Spårning 2.0: spikfilter, pausad start med play/nedräkning, paus, steg, historikkarta

Baserat på analys av verklig GPS-data (25 av 180 segment var ut-och-tillbaka-
spikar = 527 av 1090 m fejkdistans; filtret simulerat på datan: 9,1 → 5,4 km/h
= realistisk gångfart):
- 1 s-sampling + lag-buffrat spikfilter: en punkt committas först när nästa
  setts; triangel-kollapser (ut ≥4 m och direkt tillbaka) slängs
- Douglas-Peucker-nedbantning (4 m) före sparning — 182 → 16 punkter i testet
- Start i READY (pausad): play → inställbar nedräkning (0–15 s, standard 3)
  → aktiv; paus/fortsätt med bruten positionskedja så pausförflyttning
  inte räknas; tid ackumuleras bara i aktiv fas
- Stegräkning via TYPE_STEP_COUNTER under aktiv tid (ACTIVITY_RECOGNITION-
  behörighet; steg sparas på aktiviteten och räknas i dagsmätaren/målen
  när Health Connect saknas)
- Historikkarta: 🗺-knapp på spårade aktiviteter → OSM-karta med rutten
- Version 0.12.0

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01C2GA94E1f3cmrvdQLQhYdg

.gitea/workflows/release.yaml

@@ -3,10 +3,12 @@ name: release
 # På varje push till main: bygg signerad release-APK och lägg den på en
 # rullande "latest"-release på släppsidan i Gitea.
 #
-# Runnern är Pi5 (arm64). Googles aapt2 finns bara för linux x86_64, därför
-# används en statiskt byggd arm64-aapt2 (lzhiyong/android-sdk-tools) via
-# gradle-flaggan android.aapt2FromMavenOverride. Resten av Android-bygget
-# (kotlinc, d8, apksigner) är JVM-baserat och kör fint på arm64.
+# Byggs ALLTID på brasse-linux01 (label linux-amd64) — Pi5:n OOM:ar på
+# APK-bygget, och Gitea saknar runner-prioritet så delade labels gav slumpen.
+# Är huvuddatorn av köas jobbet tills runnern är tillbaka.
+# På arm64 används en statiskt byggd aapt2 (lzhiyong/android-sdk-tools) —
+# Googles aapt2 finns bara för linux x86_64. Resten av Android-bygget är
+# JVM-baserat och arkitekturoberoende.
 on:
   push:
     branches: [main]
@@ -18,7 +20,7 @@ env:
 
 jobs:
   build-release:
-    runs-on: ubuntu-latest
+    runs-on: linux-amd64
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -52,7 +54,7 @@ jobs:
           key: gradle-${{ hashFiles('gradle/wrapper/gradle-wrapper.properties', 'gradle/libs.versions.toml') }}
           restore-keys: gradle-
 
-      - name: Installera JDK 17 + Android SDK (arm64)
+      - name: Installera JDK 17 + Android SDK
         run: |
           set -e
           echo "== apt: JDK 17 + verktyg =="
@@ -70,11 +72,17 @@ jobs:
           (yes || true) | "$ANDROID_HOME/cmdline-tools/latest/bin/sdkmanager" --licenses > /dev/null
           echo "== installerar platform-35 + build-tools =="
           "$ANDROID_HOME/cmdline-tools/latest/bin/sdkmanager" "platforms;android-35" "build-tools;34.0.0" > /dev/null
-          echo "== hämtar arm64-aapt2 (Googles är x86_64-only) =="
+          if [ "$(uname -m)" = "aarch64" ]; then
+            echo "== arm64: statisk aapt2 (Googles är x86_64-only) =="
             mkdir -p "$HOME/ci-tools"
             wget -nv "$AAPT2_ARM64_URL" -O /tmp/sdk-tools-arm64.zip
             unzip -qo /tmp/sdk-tools-arm64.zip -d "$HOME/ci-tools"
             chmod +x "$HOME/ci-tools/build-tools/aapt2"
+            echo "AAPT2_BIN=$HOME/ci-tools/build-tools/aapt2" >> "$GITHUB_ENV"
+          else
+            echo "== x86_64: Googles aapt2 ur build-tools =="
+            echo "AAPT2_BIN=$ANDROID_HOME/build-tools/34.0.0/aapt2" >> "$GITHUB_ENV"
+          fi
           echo "ANDROID_HOME=$ANDROID_HOME" >> "$GITHUB_ENV"
           echo "== SDK-setup klar =="
 
@@ -82,22 +90,44 @@ jobs:
         run: |
           set -e
           export JAVA_HOME=$(dirname $(dirname $(readlink -f $(which java))))
-          # Snäll mot Pi5:n — begränsa gradles parallellism
+          if [ "$(uname -m)" = "aarch64" ]; then
+            # Snäll mot Pi5:n — begränsad parallellism + arm64-aapt2
             nice -n 10 ./gradlew --no-daemon --console=plain \
               -Dorg.gradle.workers.max=2 \
-            -Pandroid.aapt2FromMavenOverride="$HOME/ci-tools/build-tools/aapt2" \
+              -Pandroid.aapt2FromMavenOverride="$AAPT2_BIN" \
               :app:assembleRelease
+          else
+            ./gradlew --no-daemon --console=plain :app:assembleRelease
+          fi
           mkdir -p build
           cp app/build/outputs/apk/release/app-release.apk build/FitnessDroid.apk
           (cd build && sha256sum FitnessDroid.apk > checksums.txt && ls -la)
+          # version.json för appens inbyggda uppdateringskoll
+          VN=$("$AAPT2_BIN" dump badging build/FitnessDroid.apk \
+            | sed -n "s/.*versionName='\([^']*\)'.*/\1/p" | head -1)
+          SHA=$(cut -d' ' -f1 build/checksums.txt)
+          jq -n \
+            --argjson code "${{ github.run_number }}" \
+            --arg name "$VN" \
+            --arg sha "$SHA" \
+            --arg url "https://gitea.brasse-pc.eu/${{ github.repository }}/releases/download/latest/FitnessDroid.apk" \
+            '{versionCode:$code, versionName:$name, sha256:$sha, apkUrl:$url}' \
+            > build/version.json
+          cat build/version.json
 
       - name: Skapa/uppdatera latest-release + ladda upp APK
         env:
-          API: http://gitea-d:3000/api/v1
           REPO: ${{ github.repository }}
           TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           set -e
+          # gitea-d finns bara på Pi5:ns dockernät; annars publika URL:en
+          if curl -s -m 3 "http://gitea-d:3000/api/v1/version" -o /dev/null 2>/dev/null; then
+            API="http://gitea-d:3000/api/v1"
+          else
+            API="https://gitea.brasse-pc.eu/api/v1"
+          fi
+          echo "API: $API"
           TAG="latest"
           BASE="https://gitea.brasse-pc.eu/$REPO/releases/download/$TAG"
           BODY=$(cat <<EOF
@@ -124,7 +154,7 @@ jobs:
               -d "$(jq -n --arg body "$BODY" '{body:$body}')" -o /dev/null
           fi
           echo "release id: $rid"
-          for f in FitnessDroid.apk checksums.txt; do
+          for f in FitnessDroid.apk checksums.txt version.json; do
             aid=$(curl -s "$API/repos/$REPO/releases/$rid/assets" \
               -H "Authorization: token $TOKEN" | jq -r ".[] | select(.name==\"$f\") | .id")
             if [ -n "$aid" ] && [ "$aid" != "null" ]; then

LICENSE

@@ -0,0 +1,675 @@
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+
+  A patent license is "discriminatory" if it does not include within
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+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
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+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
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+
+  13. Use with the GNU Affero General Public License.
+
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+
+  14. Revised Versions of this License.
+
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+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
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+Program specifies that a certain numbered version of the GNU General
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+option of following the terms and conditions either of that numbered
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+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
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+  15. Disclaimer of Warranty.
+
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+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
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+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
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+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    {one line to give the program's name and a brief idea of what it does.}
+    Copyright (C) {year}  {name of author}
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    {project}  Copyright (C) {year}  {fullname}
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+

README.md

@@ -65,10 +65,38 @@ keytool -genkeypair -keystore signing/fitnessdroid.jks -alias fitnessdroid \
 
 ## CI
 
-`.gitea/workflows/release.yaml` bygger en signerad APK på Pi5-runnern (arm64)
-vid varje push till `main` och lägger den på den rullande `latest`-releasen.
-Eftersom Googles aapt2 bara finns för x86_64 använder bygget en statiskt byggd
-arm64-aapt2 via `android.aapt2FromMavenOverride`.
+`.gitea/workflows/release.yaml` bygger en signerad APK vid varje push till
+`main` och lägger den på den rullande `latest`-releasen. Bygget körs på
+runnern `brasse-linux01-runner` (x86_64, label `linux-amd64`) — Pi5:n orkar
+inte APK-bygget. Workflowen är ändå arkitekturvillkorad: på arm64 används en
+statiskt byggd aapt2 via `android.aapt2FromMavenOverride`.
+
+## Aktiviteter, kcal-mätare & mål
+
+Utöver gympass loggar appen **aktiviteter** (promenad, löpning, vandring,
+fäktning/HEMA m.fl. — ~64 typer ur MET-kompendiet) med GPS-livespårning
+(osmdroid/OSM-karta, fartgrind mot GPS-hopp, accelerometer-rörelsevakt),
+RPE-slider för tidsbaserade aktiviteter och offline-kö. Hemskärmen visar
+**dagens kalorier** (aktivt loggat / telefonens steg via Health Connect /
+passiv BMR) och **mål** med progress (kcal, pass, steg, aktiviteter, km —
+per dag/vecka/månad). Statistiken har en konditionssektion ❤️.
+Plan & detaljer: [`doc/activities-plan.md`](doc/activities-plan.md).
+
+## Bluetooth-våg
+
+Appen kan hämta vägningar (vikt + muskel/fett/vatten-%) direkt från en
+BLE-personvåg med [openScale](https://github.com/oliexdev/openScale)s
+drivrutiner (vendrade under `app/src/main/java/com/health/openscale/`).
+Koppla vågen under *Inställningar → Bluetooth-våg* och väg dig från profilen.
+Först ut: Biltema 84-1002 (PT-727), som är en Exingtech Y1 ("VScale").
+Detaljer: [`doc/openscale-integration.md`](doc/openscale-integration.md).
+
+## Licens
+
+GPL-3.0 (se [`LICENSE`](LICENSE)). Relicensierad från och med BT-vågstödet —
+openScales drivrutiner är GPL-3.0, vilket kräver att hela appen är det.
+BLE-biblioteket [Blessed-Kotlin](https://github.com/weliem/blessed-kotlin)
+är MIT.
 
 Mer om arkitektur och planer: [`doc/plan.md`](doc/plan.md) och
 [wikin](https://gitea.brasse-pc.eu/brasse/FitnessDroid/wiki).

app/build.gradle.kts

@@ -5,6 +5,7 @@ plugins {
     alias(libs.plugins.kotlin.android)
     alias(libs.plugins.kotlin.compose)
     alias(libs.plugins.kotlin.serialization)
+    alias(libs.plugins.ksp)
 }
 
 // Signeringsnyckeln är inte incheckad. Lokalt ligger den i signing/ (gitignorerad),
@@ -28,7 +29,7 @@ android {
         minSdk = 31
         targetSdk = 35
         versionCode = ciRunNumber ?: 1
-        versionName = "0.1.0" + (ciRunNumber?.let { "+build.$it" } ?: "-dev")
+        versionName = "0.12.0" + (ciRunNumber?.let { "+build.$it" } ?: "-dev")
     }
 
     signingConfigs {
@@ -62,6 +63,7 @@ android {
     }
     buildFeatures {
         compose = true
+        buildConfig = true
     }
 }
 
@@ -79,6 +81,12 @@ dependencies {
     implementation(libs.androidx.navigation.compose)
     implementation(libs.androidx.datastore.preferences)
     implementation(libs.okhttp)
+    implementation(libs.blessed.kotlin)
+    implementation(libs.osmdroid)
+    implementation(libs.health.connect)
     implementation(libs.kotlinx.serialization.json)
+    implementation(libs.androidx.room.runtime)
+    implementation(libs.androidx.room.ktx)
+    ksp(libs.androidx.room.compiler)
     debugImplementation(libs.androidx.compose.ui.tooling)
 }

app/src/main/AndroidManifest.xml

@@ -1,7 +1,40 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <queries>
+        <package android:name="com.google.android.apps.healthdata" />
+    </queries>
 
     <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.VIBRATE" />
+    <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
+
+    <!-- BT-våg (openScale-drivrutiner). minSdk 31 → bara de nya BLE-permissionerna behövs. -->
+    <uses-permission android:name="android.permission.BLUETOOTH_SCAN"
+        android:usesPermissionFlags="neverForLocation" />
+    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
+    <uses-feature android:name="android.hardware.bluetooth_le" android:required="false" />
+
+    <!-- GPS-spårning av aktiviteter (foreground service med notis) -->
+    <!-- tools:remove="android:maxSdkVersion": blessed-kotlin deklarerar plats-
+         behörigheterna med maxSdkVersion=30 (BLE-skanning behövde plats bara
+         t.o.m. Android 11) och manifest-mergern ärver annars in begränsningen —
+         då försvinner behörigheten helt på Android 12+ och GPS-spårningen
+         kan aldrig fråga. -->
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"
+        tools:remove="android:maxSdkVersion" />
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"
+        tools:remove="android:maxSdkVersion" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_LOCATION" />
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+    <uses-feature android:name="android.hardware.location.gps" android:required="false" />
+
+    <!-- Stegsynk via Health Connect (etapp 5) -->
+    <uses-permission android:name="android.permission.health.READ_STEPS" />
+    <!-- Telefonens stegsensor under spårade aktiviteter -->
+    <uses-permission android:name="android.permission.ACTIVITY_RECOGNITION" />
 
     <application
         android:name=".FitnessDroidApplication"
@@ -10,6 +43,21 @@
         android:supportsRtl="true"
         android:theme="@style/Theme.FitnessDroid">
 
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="${applicationId}.fileprovider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/file_paths" />
+        </provider>
+
+        <service
+            android:name=".data.TrackingService"
+            android:exported="false"
+            android:foregroundServiceType="location" />
+
         <activity
             android:name=".MainActivity"
             android:exported="true"
@@ -18,6 +66,14 @@
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
+            <!-- Health Connect: visa varför appen vill läsa steg -->
+            <intent-filter>
+                <action android:name="androidx.health.ACTION_SHOW_PERMISSIONS_RATIONALE" />
+            </intent-filter>
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW_PERMISSION_USAGE" />
+                <category android:name="android.intent.category.HEALTH_PERMISSIONS" />
+            </intent-filter>
         </activity>
     </application>
 </manifest>

app/src/main/java/com/health/openscale/core/bluetooth/ScaleCommunicator.kt

@@ -0,0 +1,113 @@
+/*
+ * openScale
+ * Copyright (C) 2025 olie.xdev <olie.xdeveloper@googlemail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.health.openscale.core.bluetooth
+
+import androidx.compose.runtime.Composable
+import com.health.openscale.core.bluetooth.data.ScaleMeasurement
+import com.health.openscale.core.bluetooth.data.ScaleUser
+import kotlinx.coroutines.flow.SharedFlow
+import kotlinx.coroutines.flow.StateFlow
+
+/**
+ * Domain events emitted by a [ScaleCommunicator].
+ *
+ * Notes for broadcast-only devices (advertisement parsing, no GATT):
+ * - The adapter emits [Listening] when scanning starts for the target MAC.
+ * - When a final (stabilized) measurement was published and scanning stops, it emits [BroadcastComplete].
+ * - For such devices, [Connected] is typically never emitted.
+ */
+sealed class BluetoothEvent {
+    enum class UserInteractionType {
+        CHOOSE_USER,
+        ENTER_CONSENT
+    }
+
+    /** Emitted when scanning starts for a broadcast-only device. */
+    data class Listening(val deviceAddress: String) : BluetoothEvent()
+
+    /** Emitted after a broadcast-only flow has completed (e.g., stabilized measurement parsed). */
+    data class BroadcastComplete(val deviceAddress: String) : BluetoothEvent()
+
+    /** Emitted when a GATT connection has been established. */
+    data class Connected(val deviceName: String, val deviceAddress: String) : BluetoothEvent()
+
+    /** Emitted when an existing GATT connection has been disconnected. */
+    data class Disconnected(val deviceAddress: String, val reason: String? = null) : BluetoothEvent()
+
+    /** Emitted when a connection attempt to a device failed. */
+    data class ConnectionFailed(val deviceAddress: String, val error: String) : BluetoothEvent()
+
+    /** Emitted when a parsed measurement is available. */
+    data class MeasurementReceived(
+        val measurement: ScaleMeasurement,
+        val deviceAddress: String
+    ) : BluetoothEvent()
+
+    /** Emitted for generic device-related errors. */
+    data class Error(val deviceAddress: String, val error: String) : BluetoothEvent()
+
+    /** Emitted for miscellaneous device/user-visible messages. */
+    data class DeviceMessage(val message: String, val deviceAddress: String) : BluetoothEvent()
+
+    /** Emitted when user interaction is required (e.g., pick user, enter consent code). */
+    data class UserInteractionRequired(
+        val deviceIdentifier: String,
+        val data: Any?,
+        val interactionType: UserInteractionType,
+    ) : BluetoothEvent()
+}
+
+/**
+ * A generic interface for communicating with Bluetooth scales.
+ * Implementations may be GATT-based or broadcast-only (advertisement parsing).
+ */
+interface ScaleCommunicator {
+
+    /** Indicates whether a connection attempt (or scan for broadcast devices) is in progress. */
+    val isConnecting: StateFlow<Boolean>
+
+    /** Indicates whether a GATT connection is active. For broadcast-only devices this is always `false`. */
+    val isConnected: StateFlow<Boolean>
+
+    /** Start communicating with a device identified by [address]. Binds the session to [scaleUser]. */
+    fun connect(address: String, scaleUser: ScaleUser?)
+
+    /** Terminate the current session (disconnect or stop scanning). */
+    fun disconnect()
+
+    /** Request a measurement (if supported; some devices only push asynchronously). */
+    fun requestMeasurement()
+
+    /**
+     * Renders the device-specific configuration UI.
+     * This allows the device handler to inject custom settings fields
+     * (like bind keys or user slots) into the settings screen.
+     */
+    @Composable
+    fun DeviceConfigurationUi()
+
+    /** Stream of [BluetoothEvent] emitted by the communicator. */
+    fun getEventsFlow(): SharedFlow<BluetoothEvent>
+
+    /** Deliver feedback for a previously requested user interaction. */
+    suspend fun processUserInteractionFeedback(
+        interactionType: BluetoothEvent.UserInteractionType,
+        appUserId: Int,
+        feedbackData: Any
+    )
+}

app/src/main/java/com/health/openscale/core/bluetooth/ScaleFactory.kt

@@ -0,0 +1,172 @@
+/*
+ * openScale
+ * Copyright (C) 2025 olie.xdev <olie.xdeveloper@googlemail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * FitnessDroid-anpassning: Hilt-DI borttagen (manuell DI), och handler-listan
+ * innehåller än så länge bara de drivrutiner som portats. Fler portas från
+ * openScale allteftersom — behåll upstream-ordningen när listan växer
+ * (första matchande handler vinner).
+ */
+package com.health.openscale.core.bluetooth
+
+import android.content.Context
+import com.health.openscale.core.bluetooth.scales.DebugGattHandler
+import com.health.openscale.core.bluetooth.scales.DeviceSupport
+import com.health.openscale.core.bluetooth.scales.ExingtechY1Handler
+import com.health.openscale.core.bluetooth.scales.GattScaleAdapter
+import com.health.openscale.core.bluetooth.scales.BroadcastScaleAdapter
+import com.health.openscale.core.bluetooth.scales.LinkMode
+import com.health.openscale.core.bluetooth.scales.ScaleDeviceHandler
+import com.health.openscale.core.bluetooth.scales.SppScaleAdapter
+import com.health.openscale.core.bluetooth.scales.TuningProfile
+import com.health.openscale.core.facade.MeasurementFacade
+import com.health.openscale.core.facade.SettingsFacade
+import com.health.openscale.core.facade.UserFacade
+import com.health.openscale.core.service.ScannedDeviceInfo
+import com.health.openscale.core.utils.LogManager
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.firstOrNull
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.withTimeout
+import kotlin.time.Duration.Companion.milliseconds
+
+/**
+ * Factory class responsible for creating appropriate [ScaleCommunicator] instances
+ * for different Bluetooth scale devices.
+ */
+class ScaleFactory(
+    private val applicationContext: Context,
+    private val settingsFacade: SettingsFacade,
+    private val measurementFacade: MeasurementFacade,
+    private val userFacade: UserFacade,
+) {
+    private val TAG = "ScaleHandlerFactory"
+
+    private val modernKotlinHandlers: List<ScaleDeviceHandler> = createHandlers()
+
+    companion object {
+        /**
+         * Builds the list of modern Kotlin-based device handlers.
+         *
+         * Order matters: [createCommunicator] returns the FIRST handler whose
+         * [ScaleDeviceHandler.supportFor] is non-null.
+         */
+        internal fun createHandlers(): List<ScaleDeviceHandler> = listOf(
+            // Portade från openScale hittills:
+            ExingtechY1Handler(), // Biltema 84-1002 (PT-727) annonserar som "VScale"
+        )
+    }
+
+    /**
+     * Reads the current value of a settings [Flow] from a non-suspending context.
+     */
+    private fun <T> readSettingBlocking(flow: Flow<T>): T? = runCatching {
+        runBlocking(Dispatchers.IO) {
+            withTimeout(250.milliseconds) { flow.firstOrNull() }
+        }
+    }.getOrNull()
+
+    private fun createModernCommunicator(
+        handler: ScaleDeviceHandler,
+        support: DeviceSupport
+    ): ScaleCommunicator? {
+        val effectiveTuning: TuningProfile = run {
+            val saved: String? = readSettingBlocking(settingsFacade.savedBluetoothTuneProfile)
+
+            saved?.let { runCatching { TuningProfile.valueOf(it) }.getOrNull() }
+                ?: support.tuningProfile
+        }
+
+        return when (support.linkMode) {
+            LinkMode.CONNECT_GATT ->
+                GattScaleAdapter(
+                    applicationContext,
+                    settingsFacade,
+                    measurementFacade,
+                    userFacade,
+                    handler,
+                    effectiveTuning
+                )
+
+            LinkMode.BROADCAST_ONLY ->
+                BroadcastScaleAdapter(
+                    applicationContext,
+                    settingsFacade,
+                    measurementFacade,
+                    userFacade,
+                    handler,
+                    effectiveTuning
+                )
+
+            LinkMode.CLASSIC_SPP ->
+                SppScaleAdapter(
+                    applicationContext,
+                    settingsFacade,
+                    measurementFacade,
+                    userFacade,
+                    handler,
+                    effectiveTuning
+                )
+        }
+    }
+
+    /**
+     * Creates the most suitable [ScaleCommunicator] for the given scanned device.
+     */
+    fun createCommunicator(deviceInfo: ScannedDeviceInfo): ScaleCommunicator? {
+        val primaryIdentifier = deviceInfo.name
+        LogManager.d(TAG, "createCommunicator: Searching for communicator for '${primaryIdentifier}' (${deviceInfo.address}). Handler hint: '${deviceInfo.determinedHandlerDisplayName}'")
+
+        if (readSettingBlocking(settingsFacade.developerModeEnabled) == true) {
+            LogManager.i(TAG, "Developer mode active → routing '$primaryIdentifier' to DebugGattHandler. No measurement will be stored.")
+            return createModernCommunicator(DebugGattHandler(), DebugGattHandler.SUPPORT)
+        }
+
+        for (handler in modernKotlinHandlers) {
+            val support = handler.supportFor(deviceInfo)
+            if (support != null) {
+                LogManager.i(TAG, "Modern handler '${support.displayName}' supports '$primaryIdentifier'.")
+                val modern = createModernCommunicator(handler, support)
+                if (modern != null) {
+                    LogManager.i(TAG, "Modern communicator '${modern.javaClass.simpleName}' created for '$primaryIdentifier' with linkMode=${support.linkMode}.")
+                    return modern
+                }
+                LogManager.w(TAG, "Modern handler '${support.displayName}' supports '$primaryIdentifier', but no communicator is available.")
+            }
+        }
+
+        LogManager.w(TAG, "No suitable communicator found for device (name: '${deviceInfo.name}', address: '${deviceInfo.address}', handler hint: '${deviceInfo.determinedHandlerDisplayName}').")
+        return null
+    }
+
+    fun getDeviceSupportFor(name: String, address: String): DeviceSupport? {
+        val info = ScannedDeviceInfo(name, address, 0, emptyList(), null)
+        return modernKotlinHandlers.firstNotNullOfOrNull { it.supportFor(info) }
+    }
+
+    /**
+     * Checks if any known handler can theoretically support the given device.
+     */
+    fun getSupportingHandlerInfo(deviceInfo: ScannedDeviceInfo): Pair<Boolean, String?> {
+        for (handler in modernKotlinHandlers) {
+            val support = handler.supportFor(deviceInfo)
+            if (support != null) return true to support.displayName
+        }
+
+        return false to null
+    }
+}

app/src/main/java/com/health/openscale/core/bluetooth/data/ScaleMeasurement.kt

@@ -0,0 +1,75 @@
+/*
+ * openScale
+ * Copyright (C) 2025 olie.xdev <olie.xdeveloper@googlemail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.health.openscale.core.bluetooth.data
+
+import com.health.openscale.core.data.WeightUnit
+import java.util.Date
+
+/**
+ * Represents a single measurement record from a scale, potentially combined from multiple BLE packets.
+ */
+data class ScaleMeasurement(
+    var userId: Int = 0xFF, // openScale's internal app user ID
+    var dateTime: Date? = null,
+    var weight: Float = 0.0f,    // must be in kg
+    var fat: Float = 0.0f,   // must be in percentage
+    var water: Float = 0.0f, // must be in percentage
+    var muscle: Float = 0.0f, // must be in percentage
+    var visceralFat: Float = 0.0f, // must be in percentage
+    var bone: Float = 0.0f,  // must be in kg
+    var lbm : Float = 0.0f, // must be in kg
+    var bmr: Float = 0.0f,       // Basal Metabolic Rate in kcal
+    var heartRate: Int = 0, // must be bpm
+    var impedance: Double = 0.0, // Ohms — high-frequency band when the scale is dual-band
+    var impedanceLow: Double = 0.0, // Ohms — low-frequency band; 0 when not reported
+    var ecw: Float = 0.0f, // Extracellular water, % of body weight
+    var icw: Float = 0.0f, // Intracellular water, % of body weight
+    var protein: Float = 0.0f, // Protein, % of body weight
+    var bcm: Float = 0.0f, // Body cell mass, kg
+) {
+
+    // --- Utility methods ---
+
+    fun hasWeight(): Boolean = this.weight > 0f
+
+    fun mergeWith(other: ScaleMeasurement) = apply {
+        if (other.weight > 0f && this.weight <= 0f) this.weight = other.weight
+        if (other.fat > 0f && this.fat <= 0f) this.fat = other.fat
+        if (other.water > 0f && this.water <= 0f) this.water = other.water
+        if (other.muscle > 0f && this.muscle <= 0f) this.muscle = other.muscle
+        if (other.visceralFat > 0f && this.visceralFat <= 0f) this.visceralFat = other.visceralFat
+        if (other.bone > 0f && this.bone <= 0f) this.bone = other.bone
+        if (other.lbm > 0f && this.lbm <= 0f) this.lbm = other.lbm
+        if (other.bmr > 0f && this.bmr <= 0f) this.bmr = other.bmr
+        if (other.heartRate > 0f && this.heartRate <= 0f) this.heartRate = other.heartRate
+        if (other.impedance > 0.0 && this.impedance <= 0.0) this.impedance = other.impedance
+        if (other.impedanceLow > 0.0 && this.impedanceLow <= 0.0) this.impedanceLow = other.impedanceLow
+        if (other.ecw > 0f && this.ecw <= 0f) this.ecw = other.ecw
+        if (other.icw > 0f && this.icw <= 0f) this.icw = other.icw
+        if (other.protein > 0f && this.protein <= 0f) this.protein = other.protein
+        if (other.bcm > 0f && this.bcm <= 0f) this.bcm = other.bcm
+
+        if (other.userId != 0xFF &&
+            (this.userId == 0xFF || this.userId == -1)) { // -1 was common init value
+            this.userId = other.userId
+        }
+
+        if (this.dateTime == null && other.dateTime != null) this.dateTime = other.dateTime
+    }
+}
+

app/src/main/java/com/health/openscale/core/bluetooth/data/ScaleUser.kt

@@ -0,0 +1,65 @@
+/*
+ * openScale
+ * Copyright (C) 2025 olie.xdev <olie.xdeveloper@googlemail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.health.openscale.core.bluetooth.data
+
+import com.health.openscale.core.data.ActivityLevel
+import com.health.openscale.core.data.GenderType
+import com.health.openscale.core.data.WeightUnit
+import java.util.Calendar
+import java.util.Date
+
+data class ScaleUser (
+    var id: Int = 0,
+    var userName: String = "",
+    var birthday: Date = Date(),
+    var bodyHeight: Float = -1f, // always in cm
+    var gender: GenderType = GenderType.MALE,
+    var initialWeight: Float = 0f, // always in kg
+    var goalWeight: Float = 0f, // always in kg
+    var scaleUnit: WeightUnit = WeightUnit.KG,
+    var activityLevel: ActivityLevel = ActivityLevel.SEDENTARY
+){
+    fun getAge(todayDate: Date?): Int {
+        val calToday = Calendar.getInstance()
+        if (todayDate != null) {
+            calToday.setTime(todayDate)
+        }
+
+        val calBirthday = Calendar.getInstance()
+        calBirthday.setTime(birthday)
+
+        return yearsBetween(calBirthday, calToday)
+    }
+
+    val age: Int
+        get() = getAge(null)
+
+    private fun yearsBetween(start: Calendar, end: Calendar): Int {
+        var years = end.get(Calendar.YEAR) - start.get(Calendar.YEAR)
+
+        val startMonth = start.get(Calendar.MONTH)
+        val endMonth = end.get(Calendar.MONTH)
+        if (endMonth < startMonth
+            || (endMonth == startMonth
+                    && end.get(Calendar.DAY_OF_MONTH) < start.get(Calendar.DAY_OF_MONTH))
+        ) {
+            years -= 1
+        }
+        return years
+    }
+}

app/src/main/java/com/health/openscale/core/bluetooth/scales/BroadcastScaleAdapter.kt

@@ -0,0 +1,249 @@
+/*
+ * openScale
+ * Copyright (C) 2025 olie.xdev <olie.xdeveloper@googlemail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.health.openscale.core.bluetooth.scales
+
+import android.bluetooth.le.ScanResult
+import android.os.SystemClock
+import androidx.compose.runtime.Composable
+import eu.brassepc.fitnessdroid.R
+import com.health.openscale.core.bluetooth.BluetoothEvent
+import com.health.openscale.core.bluetooth.data.ScaleUser
+import com.health.openscale.core.facade.MeasurementFacade
+import com.health.openscale.core.facade.SettingsFacade
+import com.health.openscale.core.facade.UserFacade
+import com.health.openscale.core.utils.LogManager
+import com.welie.blessed.BluetoothCentralManager
+import com.welie.blessed.BluetoothCentralManagerCallback
+import com.welie.blessed.BluetoothPeripheral
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.launch
+import java.util.UUID
+import kotlin.time.Duration.Companion.milliseconds
+
+// -------------------------------------------------------------------------------------------------
+// Broadcast adapter (no GATT)
+// - uses Blessed to scan for a specific address and forwards advertisements to handler.onAdvertisement()
+// - applies tuning: max scan window, retry/backoff, RSSI filter, packet de-dup, stabilization window
+// - attaches handler with a no-op transport immediately on start
+// -------------------------------------------------------------------------------------------------
+
+class BroadcastScaleAdapter(
+    context: android.content.Context,
+    settingsFacade: SettingsFacade,
+    measurementFacade: MeasurementFacade,
+    userFacade: UserFacade,
+    handler: ScaleDeviceHandler,
+    profile: TuningProfile = TuningProfile.Balanced
+) : ModernScaleAdapter(context, settingsFacade, measurementFacade, userFacade, handler) {
+
+    private val tuning: BleBroadcastTuning = profile.forBroadcast()
+
+    private lateinit var central: BluetoothCentralManager
+    private var broadcastAttached = false
+    private var scanTimeoutJob: Job? = null
+    private var attempt = 0
+    private var isScanning = false
+
+    // de-duplication: contentHash -> lastSeenMs
+    private val dedupSeen = LinkedHashMap<Int, Long>(64, 0.75f, true)
+    private var lastForwardAtMs = 0L
+
+    private fun now() = SystemClock.elapsedRealtime()
+
+    private val centralCallback = object : BluetoothCentralManagerCallback() {
+        override fun onDiscovered(peripheral: BluetoothPeripheral, scanResult: ScanResult) {
+            // Filter: only target MAC
+            if (peripheral.address != targetAddress) return
+
+            // Filter: optional RSSI threshold
+            val rssi = scanResult.rssi
+            tuning.minRssiDbm?.let { if (rssi < it) return }
+
+            // De-dup: collapse identical packets within packetDedupWindowMs
+            val bytes = scanResult.scanRecord?.bytes
+
+            LogManager.d(TAG,"Discovered advertisement from ${peripheral.address} RSSI=$rssi ${bytes?.toHexPreview(24)}")
+
+            val hash = contentHash(bytes, rssi)
+            val t = now()
+            val last = dedupSeen[hash]
+            if (last != null && (t - last) <= tuning.packetDedupWindowMs) {
+                LogManager.w(TAG, "Deduplicated packet hash=$hash from ${peripheral.address}")
+                return
+            }
+            dedupSeen[hash] = t
+            trimDedup(t)
+
+            // Attach handler as soon as we see the target device (if not already)
+            ensureAttached(peripheral.address)
+
+            // Optional stabilization: avoid forwarding bursts too quickly
+            if (t - lastForwardAtMs < tuning.stabilizeWindowMs) {
+                LogManager.w(TAG, "Skipping forwarding to handler (stabilize window) from ${peripheral.address}")
+                return
+            }
+
+            val user = selectedUserSnapshot ?: return
+            LogManager.d(TAG,"Forwarding advertisement to handler: ${peripheral.address} RSSI=$rssi ${bytes?.toHexPreview(24)}")
+            val action = handler.onAdvertisement(scanResult, user)
+            LogManager.d(TAG, "Handler returned $action for ${peripheral.address}")
+
+            when (action) {
+                BroadcastAction.IGNORED -> LogManager.d(TAG, "Advertisement IGNORED for ${peripheral.address}")
+                BroadcastAction.CONSUMED_KEEP_SCANNING -> {
+                    LogManager.d(TAG, "Advertisement CONSUMED for ${peripheral.address}")
+                    lastForwardAtMs = t
+                    _events.tryEmit(
+                        BluetoothEvent.DeviceMessage(
+                            context.getString(R.string.bt_info_waiting_for_measurement),
+                            peripheral.address
+                        )
+                    )
+                }
+                BroadcastAction.CONSUMED_STOP -> {
+                    lastForwardAtMs = t
+                    LogManager.d(TAG, "Measurement stabilized → BroadcastComplete for ${peripheral.address}")
+                    _events.tryEmit(BluetoothEvent.BroadcastComplete(peripheral.address))
+                    stopScanInternal()
+                    cleanup()
+                    broadcastAttached = false
+                }
+            }
+        }
+    }
+
+    @Composable
+    override fun DeviceConfigurationUi() {
+        // Delegate to the actual protocol handler
+        handler.DeviceConfigurationUi()
+    }
+
+    private fun ensureCentral() {
+        if (!::central.isInitialized) {
+            central = BluetoothCentralManager(context, centralCallback, mainHandler)
+        }
+    }
+
+    private fun ensureAttached(address: String) {
+        if (broadcastAttached) return
+        val driverSettings = FacadeDriverSettings(
+            facade = settingsFacade,
+            scope = scope,
+            handlerNamespace = handler::class.simpleName ?: "Handler"
+        )
+        handler.attach(noopTransport, appCallbacks, driverSettings, dataProvider, scope)
+        broadcastAttached = true
+        _events.tryEmit(BluetoothEvent.Listening(address))
+    }
+
+    private fun startScanAttempt(address: String) {
+        // reset per-attempt state
+        isScanning = true
+        lastForwardAtMs = 0
+        dedupSeen.clear()
+
+        // Blessed does not expose ScanSettings directly; we emulate tuning at our level
+        try {
+            central.scanForPeripheralsWithAddresses(setOf(address))
+            LogManager.d(TAG, "Broadcast scan started (attempt ${attempt + 1}/${tuning.common.maxRetries}) for $address")
+        } catch (e: Exception) {
+            LogManager.e(TAG, "Failed to start broadcast scan: ${e.message}", e)
+            _events.tryEmit(BluetoothEvent.ConnectionFailed(address, e.message ?: context.getString(R.string.bt_error_generic)))
+            cleanup()
+            return
+        }
+
+        // Arm scan timeout for this attempt
+        scanTimeoutJob?.cancel()
+        scanTimeoutJob = scope.launch {
+            delay(tuning.maxScanMs.milliseconds)
+            if (!isScanning) return@launch
+            LogManager.w(TAG, "Broadcast scan timed out for $address")
+            stopScanInternal()
+
+            attempt++
+            if (attempt <= tuning.common.maxRetries) {
+                delay(tuning.common.retryBackoffMs.milliseconds)
+                startScanAttempt(address)
+            } else {
+                cleanup()
+                // keep attached? we detach to be consistent with failure
+                runCatching { handler.handleDisconnected() }
+                runCatching { handler.detach() }
+                broadcastAttached = false
+            }
+        }
+    }
+
+    private fun stopScanInternal() {
+        scanTimeoutJob?.cancel(); scanTimeoutJob = null
+        runCatching { if (::central.isInitialized) central.stopScan() }
+        isScanning = false
+        lastDisconnectAtMs = now()
+    }
+
+    private fun trimDedup(t: Long) {
+        // simple time-based eviction
+        val it = dedupSeen.entries.iterator()
+        while (it.hasNext()) {
+            val e = it.next()
+            if (t - e.value > tuning.packetDedupWindowMs) it.remove()
+            else break // map is access-ordered, earliest first
+        }
+    }
+
+    private fun contentHash(bytes: ByteArray?, rssi: Int): Int {
+        if (bytes == null || bytes.isEmpty()) return rssi // fallback
+        // A lightweight rolling hash (faster than Arrays.hashCode in hot path)
+        var h = 1125899907
+        for (b in bytes) h = (h * 131) xor (b.toInt() and 0xFF)
+        // mix in coarse rssi bucket to avoid treating level-only jitter as new data
+        val bucket = (rssi / 3) // bucketize
+        return (h shl 1) xor bucket
+    }
+
+    private val noopTransport = object : ScaleDeviceHandler.Transport {
+        override fun setNotifyOn(service: UUID, characteristic: UUID) {}
+        override fun write(service: UUID, characteristic: UUID, payload: ByteArray, withResponse: Boolean) {}
+        override fun read(service: UUID, characteristic: UUID) {}
+        override fun disconnect() { doDisconnect() }
+        override fun getPeripheral(): BluetoothPeripheral? = null
+        override fun hasCharacteristic(service: UUID, characteristic: UUID): Boolean = false
+    }
+
+    override fun doConnect(address: String, selectedUser: ScaleUser) {
+        ensureCentral()
+
+        // Attach early so UI can show “Listening…”
+        ensureAttached(address)
+
+        _isConnecting.value = false
+        _isConnected.value = false
+
+        attempt = 0
+        startScanAttempt(address)
+    }
+
+    override fun doDisconnect() {
+        stopScanInternal()
+        runCatching { handler.handleDisconnected() }
+        runCatching { handler.detach() }
+        broadcastAttached = false
+    }
+}

app/src/main/java/com/health/openscale/core/bluetooth/scales/DebugGattHandler.kt

@@ -0,0 +1,193 @@
+/*
+ * openScale
+ * Copyright (C) 2025 olie.xdev <olie.xdeveloper@googlemail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+package com.health.openscale.core.bluetooth.scales
+
+import android.bluetooth.BluetoothGattCharacteristic
+import com.health.openscale.core.bluetooth.data.ScaleUser
+import com.health.openscale.core.service.ScannedDeviceInfo
+import java.util.Locale
+import java.util.UUID
+
+/**
+ * ## DebugGattHandler
+ *
+ * A pure **inspection** handler that:
+ *
+ * - Only activates while developer mode is enabled in the Bluetooth settings; it is not part of
+ *   the handler registry and never claims a device on its own.
+ * - On connect, **dumps the full GATT table** (all services and characteristics) by
+ *   asking the adapter/transport for the current `BluetoothPeripheral`.
+ * - Optionally performs a few safe reads/subscriptions on common services to trigger
+ *   some traffic (helpful to verify notifications).
+ * - Logs **every incoming notification** with a compact hex & ASCII preview.
+ *
+ * This handler **never publishes measurements** and is intended solely for diagnostics.
+ *
+ * ### Adapter requirement
+ * The adapter/transport must expose `debugGetPeripheral(): BluetoothPeripheral?`.
+ * In `GattScaleAdapter`, implement it by returning the current `BluetoothPeripheral`.
+ *
+ * ### Why this lives here
+ * We keep all formatting, pretty-printing, and logging **inside this handler**, while
+ * the adapter stays minimal and unopinionated.
+ */
+class DebugGattHandler : ScaleDeviceHandler() {
+    companion object {
+        /**
+         * The support descriptor this handler runs with. Exposed because the handler is no longer
+         * part of the registry: [com.health.openscale.core.bluetooth.ScaleFactory] instantiates it
+         * directly when developer mode is on and needs the descriptor to pick the adapter.
+         */
+        val SUPPORT = DeviceSupport(
+            displayName = "Debug",
+            capabilities = emptySet(),   // no functional features
+            implemented = emptySet(),
+            tuningProfile = TuningProfile.Balanced,
+            linkMode = LinkMode.CONNECT_GATT
+        )
+    }
+
+    /**
+     * Never claims a device by itself. Developer mode is a separate setting
+     * ([com.health.openscale.core.facade.SettingsFacade.developerModeEnabled]); routing it through
+     * the device name used to overwrite the saved scale's identity, which silently broke the
+     * pairing (issue #1478).
+     */
+    override fun supportFor(device: ScannedDeviceInfo): DeviceSupport? = null
+
+    /**
+     * On connect:
+     * 1) Dump the **entire** GATT service/characteristic tree.
+     * 2) Optionally poke a few common characteristics (best-effort).
+     * 3) Arm light-weight subscriptions to typical measurement characteristics,
+     *    if present (best-effort; errors are logged).
+     */
+    override fun onConnected(user: ScaleUser) {
+        logD("Connected in Debug mode. Dumping full GATT services/characteristics…")
+        dumpAllGatt()
+
+        // --- Optional sanity probes (best-effort; they can fail silently) -----
+        // Generic Access: Device Name
+        readSafe(uuid16(0x1800), uuid16(0x2A00))
+        // Device Information: Manufacturer / Model / FW / SW
+        readSafe(uuid16(0x180A), uuid16(0x2A29))
+        readSafe(uuid16(0x180A), uuid16(0x2A24))
+        readSafe(uuid16(0x180A), uuid16(0x2A26))
+        readSafe(uuid16(0x180A), uuid16(0x2A28))
+        // Battery Level
+        readSafe(uuid16(0x180F), uuid16(0x2A19))
+
+        // Subscribe to common measurement characteristics if present
+        setNotifySafe(uuid16(0x181D), uuid16(0x2A9D)) // Weight Scale -> Weight Measurement
+        setNotifySafe(uuid16(0x181B), uuid16(0x2A9C)) // Body Comp   -> Body Composition Measurement
+
+        logD("Debug handler armed. Incoming NOTIFY frames will be logged; no data is stored.")
+    }
+
+    /**
+     * Every incoming notification is logged in a concise form:
+     * - Pretty UUID (16-bit when possible)
+     * - Hex preview (up to 64 bytes)
+     * - ASCII preview (non-printables as '?')
+     */
+    override fun onNotification(characteristic: UUID, data: ByteArray, user: ScaleUser) {
+        val hex = data.toHexPreview(64)
+        val ascii = data.toAsciiPreview(64)
+        logD("NOTIFY chr=${prettyUuid(characteristic)}  $hex  ascii=$ascii")
+    }
+
+    // ---------------------------------------------------------------------------------------------
+    // Dump utilities
+    // ---------------------------------------------------------------------------------------------
+
+    /**
+     * Dump all discovered GATT services and their characteristics (with property flags).
+     * Uses the transport's `debugGetPeripheral()` hook to access the raw peripheral.
+     */
+    private fun dumpAllGatt() {
+        val peripheral = getPeripheral()
+        if (peripheral == null) {
+            logD("No peripheral available yet (transport.debugGetPeripheral() returned null).")
+            return
+        }
+
+        val services = peripheral.services
+        logD("=== GATT Service Dump BEGIN ===")
+        if (services.isEmpty()) {
+            logD( "(no services)")
+            logD( "=== GATT Service Dump END ===")
+            return
+        }
+
+        for (svc in services) {
+            logD( "Service ${prettyUuid(svc.uuid)}")
+            val chars = svc.characteristics ?: emptyList()
+            for (ch in chars) {
+                logD("  └─ Char ${prettyUuid(ch.uuid)} props=${propsToString(ch.properties)}"
+                )
+            }
+        }
+        logD("=== GATT Service Dump END ===")
+    }
+
+    // ---------------------------------------------------------------------------------------------
+    // Safe wrappers (never throw; best-effort operations)
+    // ---------------------------------------------------------------------------------------------
+
+    private fun setNotifySafe(service: UUID, characteristic: UUID) {
+        logD("→ setNotifyOn svc=${prettyUuid(service)} chr=${prettyUuid(characteristic)}")
+        runCatching { setNotifyOn(service, characteristic) }
+            .onFailure { logD("setNotifyOn failed: ${it.message ?: it::class.simpleName}") }
+    }
+
+    private fun readSafe(service: UUID, characteristic: UUID) {
+        logD("→ read svc=${prettyUuid(service)} chr=${prettyUuid(characteristic)} (best effort)")
+        runCatching { readFrom(service, characteristic) }
+            .onFailure { logD("read failed: ${it.message ?: it::class.simpleName}") }
+    }
+
+    // ---------------------------------------------------------------------------------------------
+    // Pretty-print helpers
+    // ---------------------------------------------------------------------------------------------
+
+    /**
+     * Convert a standard 128-bit UUID with the Bluetooth base into a compact **0xNNNN** form.
+     * Leaves full UUIDs intact for vendor/custom values.
+     */
+    private fun prettyUuid(u: UUID): String {
+        val s = u.toString().lowercase(Locale.ROOT)
+        return if (s.startsWith("0000") && s.endsWith("-0000-1000-8000-00805f9b34fb"))
+            "0x" + s.substring(4, 8)
+        else
+            s
+    }
+
+    /**
+     * Turn Android GATT property flags into a readable pipe-separated string.
+     * Example: `READ|WRITE_NR|NOTIFY|INDICATE`
+     */
+    private fun propsToString(p: Int): String {
+        val flags = mutableListOf<String>()
+        if ((p and BluetoothGattCharacteristic.PROPERTY_READ) != 0) flags += "READ"
+        if ((p and BluetoothGattCharacteristic.PROPERTY_WRITE) != 0) flags += "WRITE"
+        if ((p and BluetoothGattCharacteristic.PROPERTY_WRITE_NO_RESPONSE) != 0) flags += "WRITE_NR"
+        if ((p and BluetoothGattCharacteristic.PROPERTY_NOTIFY) != 0) flags += "NOTIFY"
+        if ((p and BluetoothGattCharacteristic.PROPERTY_INDICATE) != 0) flags += "INDICATE"
+        if ((p and BluetoothGattCharacteristic.PROPERTY_SIGNED_WRITE) != 0) flags += "SIGNED"
+        if ((p and BluetoothGattCharacteristic.PROPERTY_BROADCAST) != 0) flags += "BROADCAST"
+        if ((p and BluetoothGattCharacteristic.PROPERTY_EXTENDED_PROPS) != 0) flags += "EXT"
+        return if (flags.isEmpty()) "0" else flags.joinToString("|")
+    }
+}

app/src/main/java/com/health/openscale/core/bluetooth/scales/ExingtechY1Handler.kt

@@ -0,0 +1,138 @@
+/*
+ * openScale
+ * Copyright (C) 2025 olie.xdev <olie.xdeveloper@googlemail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.health.openscale.core.bluetooth.scales
+
+import eu.brassepc.fitnessdroid.R
+import com.health.openscale.core.bluetooth.data.ScaleMeasurement
+import com.health.openscale.core.bluetooth.data.ScaleUser
+import com.health.openscale.core.service.ScannedDeviceInfo
+import com.health.openscale.core.utils.ConverterUtils
+import java.util.Date
+import java.util.Locale
+import java.util.UUID
+
+/**
+ * Handler for Exingtech Y1 scales (often advertising as "VScale").
+ *
+ * Protocol:
+ *  - Custom Service:      f433bd80-75b8-11e2-97d9-0002a5d5c51b
+ *  - Notify Characteristic: 1a2ea400-75b9-11e2-be05-0002a5d5c51b
+ *  - Write Characteristic:  29f11080-75b9-11e2-8bf6-0002a5d5c51b
+ *
+ * Flow:
+ *  1) Enable NOTIFY on data characteristic.
+ *  2) Write user block: [0x10, userId, gender(0=male/1=female), age, height(cm)].
+ *  3) Wait for a 20-byte result frame; the first one may only contain weight.
+ *     Publish when body composition (fat) is present (data[6] != 0xFF).
+ */
+class ExingtechY1Handler : ScaleDeviceHandler() {
+
+    private val SERVICE: UUID =
+        UUID.fromString("f433bd80-75b8-11e2-97d9-0002a5d5c51b")
+    private val CHAR_NOTIFY: UUID =
+        UUID.fromString("1a2ea400-75b9-11e2-be05-0002a5d5c51b")
+    private val CHAR_CMD: UUID =
+        UUID.fromString("29f11080-75b9-11e2-8bf6-0002a5d5c51b")
+
+    override fun supportFor(device: ScannedDeviceInfo): DeviceSupport? {
+        val name = device.name.lowercase(Locale.US)
+        val byName = (name == "vscale")
+
+        val byService = device.serviceUuids.any {
+            it.equals(SERVICE)
+        }
+
+        if (!byName && !byService) return null
+
+        val caps = setOf(
+            DeviceCapability.BODY_COMPOSITION,
+            DeviceCapability.USER_SYNC
+        )
+
+        return DeviceSupport(
+            displayName = "Exingtech Y1 (VScale)",
+            capabilities = caps,
+            implemented = caps,
+            linkMode = LinkMode.CONNECT_GATT
+        )
+    }
+
+    override fun onConnected(user: ScaleUser) {
+        // Enable notifications for result frames
+        setNotifyOn(SERVICE, CHAR_NOTIFY)
+
+        // Send user block (id is truncated to 1 byte like legacy driver)
+        val userIdOneByte = (user.id and 0xFF).toByte()
+        val gender = if (user.gender.isMale()) 0x00 else 0x01
+        val age = (user.age and 0xFF).toByte()
+        val height = (user.bodyHeight.toInt() and 0xFF).toByte()
+
+        val cmd = byteArrayOf(
+            0x10,
+            userIdOneByte,
+            gender.toByte(),
+            age,
+            height
+        )
+        writeTo(SERVICE, CHAR_CMD, cmd, withResponse = true)
+
+        // Prompt user
+        userInfo(R.string.bt_info_step_on_scale)
+    }
+
+    override fun onNotification(characteristic: UUID, data: ByteArray, user: ScaleUser) {
+        if (characteristic != CHAR_NOTIFY) return
+        if (data.size != 20) return
+
+        // The first notify can be "weight only"; full composition follows.
+        // In legacy code we waited until fat != 0xFF.
+        val fatHi = data[6]
+        if (fatHi.toInt() and 0xFF == 0xFF) {
+            logD("VScale: weight-only frame, waiting for full composition…")
+            return
+        }
+
+        publish(parseMeasurement(data))
+    }
+
+    // --- Parsing --------------------------------------------------------------
+
+    private fun parseMeasurement(frame: ByteArray): ScaleMeasurement {
+        // Big-endian 16-bit fields, matching legacy ConverterUtils.fromUnsignedInt16Be
+        val weight = ConverterUtils.fromUnsignedInt16Be(frame, 4) / 10.0f
+        val fat = ConverterUtils.fromUnsignedInt16Be(frame, 6) / 10.0f
+        val water = ConverterUtils.fromUnsignedInt16Be(frame, 8) / 10.0f
+        val bone = ConverterUtils.fromUnsignedInt16Be(frame, 10) / 10.0f
+        val muscle = ConverterUtils.fromUnsignedInt16Be(frame, 12) / 10.0f
+        val visceralIndex = (frame[14].toInt() and 0xFF).toFloat()
+        // calorie (offset 15) and BMI (offset 17) exist but are computed by app; skip.
+
+        return ScaleMeasurement().apply {
+            dateTime = Date()
+            this.weight = weight
+            this.fat = fat
+            this.water = water
+            this.muscle = muscle
+            this.bone = bone
+            this.visceralFat = visceralIndex
+        }.also {
+            logD("VScale result kg=${it.weight} fat=${it.fat} water=${it.water} muscle=${it.muscle} bone=${it.bone} visc=${it.visceralFat}"
+            )
+        }
+    }
+}

app/src/main/java/com/health/openscale/core/bluetooth/scales/GattScaleAdapter.kt

@@ -0,0 +1,428 @@
+/*
+ * openScale
+ * Copyright (C) 2025 olie.xdev <olie.xdeveloper@googlemail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.health.openscale.core.bluetooth.scales
+
+import android.bluetooth.BluetoothGattCharacteristic
+import android.bluetooth.le.ScanResult
+import android.content.Context
+import android.os.SystemClock
+import androidx.compose.runtime.Composable
+import eu.brassepc.fitnessdroid.R
+import com.health.openscale.core.bluetooth.BluetoothEvent
+import com.health.openscale.core.bluetooth.data.ScaleUser
+import com.health.openscale.core.facade.MeasurementFacade
+import com.health.openscale.core.facade.SettingsFacade
+import com.health.openscale.core.facade.UserFacade
+import com.health.openscale.core.utils.LogManager
+import com.welie.blessed.BluetoothCentralManager
+import com.welie.blessed.BluetoothCentralManagerCallback
+import com.welie.blessed.BluetoothPeripheral
+import com.welie.blessed.BluetoothPeripheralCallback
+import com.welie.blessed.ConnectionPriority
+import com.welie.blessed.GattStatus
+import com.welie.blessed.HciStatus
+import com.welie.blessed.WriteType
+import kotlinx.coroutines.CompletableDeferred
+import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.withTimeout
+import java.util.UUID
+import java.util.concurrent.ConcurrentHashMap
+import kotlin.time.Duration.Companion.milliseconds
+
+// -------------------------------------------------------------------------------------------------
+// GATT adapter (BLE)
+// - scans for a specific address and connects via Blessed
+// - enables notifications, handles read/write with pacing (BleTuning)
+// - forwards notifications to handler.onNotification()
+// -------------------------------------------------------------------------------------------------
+
+class GattScaleAdapter(
+    context: Context,
+    settingsFacade: SettingsFacade,
+    measurementFacade: MeasurementFacade,
+    userFacade: UserFacade,
+    handler: ScaleDeviceHandler,
+    profile: TuningProfile = TuningProfile.Balanced
+) : ModernScaleAdapter(context, settingsFacade, measurementFacade, userFacade, handler) {
+
+    private val tuning: BleGattTuning = profile.forGatt()
+    private lateinit var central: BluetoothCentralManager
+    private var currentPeripheral: BluetoothPeripheral? = null
+
+    private val opQueue = Channel<suspend () -> Unit>(Channel.UNLIMITED)
+
+    private data class PendingOp(
+        val id: Long,
+        val deferred: CompletableDeferred<Unit>
+    )
+
+    private val deferredMap = ConcurrentHashMap<UUID, PendingOp>()
+    private var nextOpId = 0L
+
+    private val ioMutex = Mutex()
+
+    private var connectAttempts = 0
+
+    init {
+        // Worker coroutine processes queued BLE operations sequentially
+        scope.launch {
+            for (op in opQueue) {
+                // wait until BLE connection is established
+                while (!_isConnected.value) {
+                    delay(10.milliseconds)
+                }
+
+                try {
+                    ioMutex.lock()
+                    op()
+                } catch (t: Throwable) {
+                    LogManager.e(TAG, "BLE operation failed", t)
+                } finally {
+                    ioMutex.unlock()
+                }
+            }
+        }
+    }
+
+    @Composable
+    override fun DeviceConfigurationUi() {
+        // Delegate to the actual protocol handler
+        handler.DeviceConfigurationUi()
+    }
+
+    private suspend fun ioGap(ms: Long) {
+        if (ms > 0) delay(ms.milliseconds)
+    }
+
+    // -------------------------------------------------------------------------------------------------
+    // Bluetooth central callbacks
+    // -------------------------------------------------------------------------------------------------
+    private val centralCallback = object : BluetoothCentralManagerCallback() {
+        override fun onDiscovered(peripheral: BluetoothPeripheral, scanResult: ScanResult) {
+            if (peripheral.address != targetAddress) return
+            LogManager.i(TAG, "Found $targetAddress → stop scan + connect")
+            central.stopScan()
+            scope.launch {
+                if (tuning.connectAfterScanDelayMs > 0) delay(tuning.connectAfterScanDelayMs.milliseconds)
+                central.connect(peripheral, peripheralCallback)
+            }
+        }
+
+        override fun onConnected(peripheral: BluetoothPeripheral) {
+            scope.launch {
+                currentPeripheral = peripheral
+                _isConnected.value = true
+                _isConnecting.value = false
+                _events.tryEmit(BluetoothEvent.Connected(peripheral.name, peripheral.address))
+            }
+        }
+
+        override fun onConnectionFailed(peripheral: BluetoothPeripheral, status: HciStatus) {
+            scope.launch {
+                LogManager.e(TAG, "Connection failed ${peripheral.address}: $status")
+                if (connectAttempts < tuning.common.maxRetries) {
+                    val nextTry = connectAttempts + 1
+                    _events.tryEmit(
+                        BluetoothEvent.DeviceMessage(
+                            context.getString(R.string.bt_info_reconnecting_try, nextTry, tuning.common.maxRetries),
+                            peripheral.address
+                        )
+                    )
+                    connectAttempts = nextTry
+                    delay(tuning.common.retryBackoffMs.milliseconds)
+                    runCatching { central.stopScan() }
+                    central.scanForPeripheralsWithAddresses(setOf(peripheral.address))
+                    _isConnecting.value = true
+                } else {
+                    _events.tryEmit(BluetoothEvent.ConnectionFailed(peripheral.address, status.toString()))
+                    cleanup()
+                }
+            }
+        }
+
+        override fun onDisconnected(peripheral: BluetoothPeripheral, status: HciStatus) {
+            scope.launch {
+                LogManager.i(TAG, "Disconnected ${peripheral.address}: $status")
+                runCatching { handler.handleDisconnected() }
+                runCatching { handler.detach() }
+                lastDisconnectAtMs = SystemClock.elapsedRealtime()
+                if (peripheral.address == targetAddress) {
+                    _events.tryEmit(BluetoothEvent.Disconnected(peripheral.address, status.toString()))
+                    cleanup()
+                }
+            }
+        }
+    }
+
+    // -------------------------------------------------------------------------------------------------
+    // Peripheral callback receives all GATT events
+    // -------------------------------------------------------------------------------------------------
+    private val peripheralCallback = object : BluetoothPeripheralCallback() {
+        override fun onServicesDiscovered(peripheral: BluetoothPeripheral) {
+            LogManager.d(TAG, "Services discovered for ${peripheral.address}")
+            currentPeripheral = peripheral
+
+            if (tuning.requestHighConnectionPriority) runCatching { peripheral.requestConnectionPriority(ConnectionPriority.HIGH) }
+            if (tuning.requestMtuBytes > 23) runCatching { peripheral.requestMtu(tuning.requestMtuBytes) }
+
+            val user = selectedUserSnapshot ?: run {
+                central.cancelConnection(peripheral); return
+            }
+
+            val driverSettings = FacadeDriverSettings(
+                facade = settingsFacade,
+                scope = scope,
+                handlerNamespace = handler::class.simpleName ?: "Handler"
+            )
+
+            handler.attach(transport, appCallbacks, driverSettings, dataProvider, scope)
+            handler.handleConnected(user)
+        }
+
+        override fun onCharacteristicWrite(
+            peripheral: BluetoothPeripheral,
+            value: ByteArray,
+            characteristic: BluetoothGattCharacteristic,
+            status: GattStatus
+        ) {
+            LogManager.d(TAG,"\u2190 write response chr=${characteristic.uuid} len=${value.size} status=${status} ${value.toHexPreview(24)}")
+
+            deferredMap[characteristic.uuid]?.let { op ->
+                op.deferred.complete(Unit)
+                deferredMap.remove(characteristic.uuid)
+            }
+        }
+
+        override fun onNotificationStateUpdate(
+            peripheral: BluetoothPeripheral,
+            characteristic: BluetoothGattCharacteristic,
+            status: GattStatus
+        ) {
+            LogManager.d(TAG,"\u2190 notify state chr=${characteristic.uuid} status=${status}")
+
+            deferredMap[characteristic.uuid]?.let { op ->
+                op.deferred.complete(Unit)
+                deferredMap.remove(characteristic.uuid)
+            }
+        }
+
+        override fun onCharacteristicUpdate(
+            peripheral: BluetoothPeripheral,
+            value: ByteArray,
+            characteristic: BluetoothGattCharacteristic,
+            status: GattStatus
+        ) {
+            LogManager.d(TAG,"\u2190 received data chr=${characteristic.uuid} len=${value.size} status=${status} ${value.toHexPreview(24)}")
+
+            handler.handleNotification(characteristic.uuid, value)
+
+            deferredMap[characteristic.uuid]?.let { op ->
+                op.deferred.complete(Unit)
+                deferredMap.remove(characteristic.uuid)
+            }
+        }
+    }
+
+    // -------------------------------------------------------------------------------------------------
+    // Transport exposed to handler; operations are queued automatically
+    // -------------------------------------------------------------------------------------------------
+    private val transport = object : ScaleDeviceHandler.Transport {
+
+        override fun setNotifyOn(service: UUID, characteristic: UUID) {
+            opQueue.trySend {
+                val p = currentPeripheral ?: return@trySend
+                LogManager.d(TAG, "→ set notify on chr=$characteristic svc=$service")
+
+                val opId = ++nextOpId
+                val deferred = CompletableDeferred<Unit>()
+                deferredMap[characteristic] = PendingOp(opId, deferred)
+
+                val started = p.startNotify(service, characteristic)
+                if (!started) {
+                    LogManager.w(TAG, "Failed to initiate notify for $characteristic")
+                   // appCallbacks.onWarn(R.string.bt_warn_notify_failed, characteristic.toString())
+                    deferred.complete(Unit)
+                    deferredMap.remove(characteristic)
+                }
+
+                try {
+                    // Wait with timeout from tuning
+                    withTimeout(tuning.operationTimeoutMs.milliseconds) {
+                        deferred.await()
+                    }
+                } catch (_: Exception) {
+                    LogManager.w(TAG, "Timeout waiting for notify on $characteristic")
+                } finally {
+                    val current = deferredMap[characteristic]
+                    if (current?.id == opId) {
+                        deferredMap.remove(characteristic)
+                    }
+                    deferred.cancel()
+                }
+
+                ioGap(tuning.notifySetupDelayMs)
+            }
+        }
+
+        override fun write(service: UUID, characteristic: UUID, payload: ByteArray, withResponse: Boolean) {
+            opQueue.trySend {
+                val p = currentPeripheral ?: return@trySend
+                val ch = p.getCharacteristic(service, characteristic) ?: return@trySend
+
+                val opId = ++nextOpId
+                val deferred = CompletableDeferred<Unit>()
+                deferredMap[characteristic] = PendingOp(opId, deferred)
+
+                val supportsWriteNoResponse = ch.properties and BluetoothGattCharacteristic.PROPERTY_WRITE_NO_RESPONSE != 0
+                val supportsWriteResponse = ch.properties and BluetoothGattCharacteristic.PROPERTY_WRITE != 0
+
+                val type = when {
+                    withResponse && supportsWriteResponse -> WriteType.WITH_RESPONSE
+                    !withResponse && supportsWriteNoResponse -> WriteType.WITHOUT_RESPONSE
+                    supportsWriteResponse -> {
+                        LogManager.w(TAG, "Characteristic $characteristic does not support WITHOUT_RESPONSE, using WITH_RESPONSE instead")
+                        WriteType.WITH_RESPONSE
+                    }
+                    supportsWriteNoResponse -> {
+                        LogManager.w(TAG, "Characteristic $characteristic does not support WITH_RESPONSE, using WITHOUT_RESPONSE instead")
+                        WriteType.WITHOUT_RESPONSE
+                    }
+                    else -> {
+                        LogManager.w(TAG, "Characteristic $characteristic does not support writing")
+                        return@trySend
+                    }
+                }
+
+                ioGap(if (withResponse) tuning.writeWithResponseDelayMs else tuning.writeWithoutResponseDelayMs)
+                p.writeCharacteristic(service, characteristic, payload, type)
+
+                LogManager.d(TAG,"\u2192 write to chr=$characteristic svc=$service len=${payload.size} withResp=$withResponse ${payload.toHexPreview(24)}")
+
+                try {
+                    withTimeout(tuning.operationTimeoutMs.milliseconds) {
+                        deferred.await()
+                    }
+                } catch (_: Throwable) {
+                    LogManager.w(TAG, "Timeout waiting for write on $characteristic")
+                } finally {
+                    val current = deferredMap[characteristic]
+                    if (current?.id == opId) {
+                        deferredMap.remove(characteristic)
+                    }
+                    deferred.cancel()
+                }
+
+                ioGap(tuning.postWriteDelayMs)
+            }
+        }
+
+        override fun read(service: UUID, characteristic: UUID) {
+            opQueue.trySend {
+                val p = currentPeripheral ?: return@trySend
+                p.getCharacteristic(service, characteristic) ?: return@trySend
+
+                val opId = ++nextOpId
+                val deferred = CompletableDeferred<Unit>()
+                deferredMap[characteristic] = PendingOp(opId, deferred)
+
+                p.readCharacteristic(service, characteristic)
+
+                LogManager.d(TAG,"\u2192 read from chr=$characteristic svc=$service")
+
+                try {
+                    withTimeout(tuning.operationTimeoutMs.milliseconds) {
+                        deferred.await()
+                    }
+                } catch (_: Throwable) {
+                    LogManager.w(TAG, "Timeout waiting for read on $characteristic")
+                } finally {
+                    val current = deferredMap[characteristic]
+                    if (current?.id == opId) {
+                        deferredMap.remove(characteristic)
+                    }
+                    deferred.cancel()
+                }
+
+                ioGap(tuning.postReadDelayMs)
+            }
+        }
+
+        override fun disconnect() {
+            currentPeripheral?.let { central.cancelConnection(it) }
+        }
+
+        override fun getPeripheral(): BluetoothPeripheral? = currentPeripheral
+
+        override fun hasCharacteristic(service: UUID, characteristic: UUID): Boolean {
+            val p = currentPeripheral ?: return false
+            return p.getCharacteristic(service, characteristic) != null
+        }
+    }
+
+    // -------------------------------------------------------------------------------------------------
+    // Connection management
+    // -------------------------------------------------------------------------------------------------
+    override fun doConnect(address: String, selectedUser: ScaleUser) {
+        if (!::central.isInitialized) {
+            central = BluetoothCentralManager(context, centralCallback, mainHandler)
+        }
+
+        val sinceLastDisconnect = SystemClock.elapsedRealtime() - lastDisconnectAtMs
+        val waitMs = (tuning.common.reconnectCooldownMs - sinceLastDisconnect).coerceAtLeast(0)
+
+        connectAttempts = 0
+        _isConnected.value = false
+        _isConnecting.value = true
+
+        runCatching { central.stopScan() }
+
+        scope.launch {
+            if (waitMs > 0) delay(waitMs.milliseconds)
+            try {
+                central.scanForPeripheralsWithAddresses(setOf(address))
+            } catch (e: Exception) {
+                LogManager.e(TAG, "Failed to start scan/connect: ${e.message}", e)
+                _events.tryEmit(
+                    BluetoothEvent.ConnectionFailed(
+                        address,
+                        e.message ?: context.getString(R.string.bt_error_generic)
+                    )
+                )
+                cleanup()
+            }
+        }
+    }
+
+    override fun doDisconnect() {
+        runCatching { if (::central.isInitialized) central.stopScan() }
+        currentPeripheral?.let { runCatching { central.cancelConnection(it) } }
+        currentPeripheral = null
+    }
+
+    override fun close() {
+        // Stop accepting new BLE operations and release the Blessed central
+        // (its broadcast receivers) before the base cancels the coroutine scope,
+        // which terminates the busy-waiting op-queue worker.
+        runCatching { opQueue.close() }
+        runCatching { if (::central.isInitialized) central.close() }
+        super.close()
+    }
+}

app/src/main/java/com/health/openscale/core/bluetooth/scales/ModernScaleAdapter.kt

@@ -0,0 +1,552 @@
+/*
+ * openScale
+ * Copyright (C) 2025 olie.xdev <olie.xdeveloper@googlemail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.health.openscale.core.bluetooth.scales
+
+import android.bluetooth.le.ScanSettings
+import android.os.Handler
+import android.os.Looper
+import androidx.annotation.StringRes
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.SignalCellularAlt
+import androidx.compose.material.icons.filled.SignalCellularAlt1Bar
+import androidx.compose.material.icons.outlined.SignalCellularAlt2Bar
+import androidx.compose.ui.graphics.vector.ImageVector
+import eu.brassepc.fitnessdroid.R
+import com.health.openscale.core.bluetooth.BluetoothEvent
+import com.health.openscale.core.bluetooth.ScaleCommunicator
+import com.health.openscale.core.bluetooth.data.ScaleMeasurement
+import com.health.openscale.core.bluetooth.data.ScaleUser
+import com.health.openscale.core.data.MeasurementTypeKey
+import com.health.openscale.core.data.MeasurementValue
+import com.health.openscale.core.data.UnitType
+import com.health.openscale.core.data.User
+import com.health.openscale.core.facade.MeasurementFacade
+import com.health.openscale.core.facade.SettingsFacade
+import com.health.openscale.core.facade.UserFacade
+import com.health.openscale.core.model.MeasurementWithValues
+import com.health.openscale.core.utils.ConverterUtils
+import com.health.openscale.core.utils.LogManager
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.cancel
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.SharedFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asSharedFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.flatMapLatest
+import kotlinx.coroutines.flow.flowOf
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.withTimeout
+import kotlinx.coroutines.withTimeoutOrNull
+import java.util.Date
+import java.util.concurrent.ConcurrentHashMap
+import kotlin.math.min
+import kotlin.time.Duration.Companion.milliseconds
+
+// -------------------------------------------------------------------------------------------------
+// Shared tuning for BLE pacing & retry (used by GATT adapter).
+// -------------------------------------------------------------------------------------------------
+
+// Common knobs every link can use
+data class CommonTuning(
+    val reconnectCooldownMs: Long = 2000,
+    val retryBackoffMs: Long = 1500,
+    val maxRetries: Int = 3
+)
+
+// GATT-specific
+data class BleGattTuning(
+    val common: CommonTuning = CommonTuning(),
+    val notifySetupDelayMs: Long = 120,
+    val writeWithResponseDelayMs: Long = 80,
+    val writeWithoutResponseDelayMs: Long = 35,
+    val postWriteDelayMs: Long = 20,
+    val postReadDelayMs: Long = 20,
+    val connectAfterScanDelayMs: Long = 650,
+    val requestHighConnectionPriority: Boolean = false,
+    val requestMtuBytes: Int = 185,
+    val operationTimeoutMs: Long = 1000
+)
+
+// Broadcast scanner tuning
+data class BleBroadcastTuning(
+    val common: CommonTuning = CommonTuning(),
+    val scanMode: Int = ScanSettings.SCAN_MODE_LOW_LATENCY,
+    val maxScanMs: Long = 20_000,
+    val restartBackoffMs: Long = 1500,
+    val packetDedupWindowMs: Long = 750,
+    val stabilizeWindowMs: Long = 1200,
+    val minRssiDbm: Int? = null // e.g. -90
+)
+
+// Classic SPP tuning
+data class BtSppTuning(
+    val common: CommonTuning = CommonTuning(),
+    val connectTimeoutMs: Long = 10_000,
+    val readTimeoutMs: Long = 3000,
+    val writeChunkBytes: Int = 256,
+    val interChunkDelayMs: Long = 10,
+    val soKeepAlive: Boolean = true
+)
+
+enum class TuningProfile(
+    @param:StringRes val labelRes: Int,
+    val icon: ImageVector
+) {
+    Conservative(
+        labelRes = R.string.tuning_conservative,
+        icon = Icons.Filled.SignalCellularAlt1Bar
+    ),
+    Balanced(
+        labelRes = R.string.tuning_balanced,
+        icon = Icons.Outlined.SignalCellularAlt2Bar
+    ),
+    Aggressive(
+        labelRes = R.string.tuning_aggressive,
+        icon = Icons.Filled.SignalCellularAlt
+    )
+}
+fun TuningProfile.forGatt(): BleGattTuning = when (this) {
+    TuningProfile.Balanced -> BleGattTuning(
+        common = CommonTuning(2200, 1500, 3),
+        notifySetupDelayMs = 120,
+        writeWithResponseDelayMs = 80,
+        writeWithoutResponseDelayMs = 35,
+        postWriteDelayMs = 20,
+        postReadDelayMs = 20,
+        connectAfterScanDelayMs = 650,
+        requestHighConnectionPriority = false,
+        requestMtuBytes = 185,
+        operationTimeoutMs = 1000
+    )
+    TuningProfile.Conservative -> BleGattTuning(
+        common = CommonTuning(2500, 1800, 3),
+        notifySetupDelayMs = 160,
+        writeWithResponseDelayMs = 100,
+        writeWithoutResponseDelayMs = 50,
+        postWriteDelayMs = 30,
+        postReadDelayMs = 30,
+        connectAfterScanDelayMs = 800,
+        requestHighConnectionPriority = false,
+        requestMtuBytes = 0,
+        operationTimeoutMs = 2000
+    )
+    TuningProfile.Aggressive -> BleGattTuning(
+        common = CommonTuning(1200, 1200, 2),
+        notifySetupDelayMs = 80,
+        writeWithResponseDelayMs = 60,
+        writeWithoutResponseDelayMs = 25,
+        postWriteDelayMs = 15,
+        postReadDelayMs = 15,
+        connectAfterScanDelayMs = 400,
+        requestHighConnectionPriority = true,
+        requestMtuBytes = 247,
+        operationTimeoutMs = 500
+    )
+}
+
+fun TuningProfile.forBroadcast(): BleBroadcastTuning = when (this) {
+    TuningProfile.Balanced -> BleBroadcastTuning(common = CommonTuning(2200,1500,3))
+    TuningProfile.Conservative -> BleBroadcastTuning(
+        common = CommonTuning(2500,1800,3),
+        scanMode = ScanSettings.SCAN_MODE_BALANCED,
+        maxScanMs = 30_000
+    )
+    TuningProfile.Aggressive -> BleBroadcastTuning(
+        common = CommonTuning(1200,1200,2),
+        scanMode = ScanSettings.SCAN_MODE_LOW_LATENCY,
+        maxScanMs = 15_000,
+        stabilizeWindowMs = 900
+    )
+}
+
+fun TuningProfile.forSpp(): BtSppTuning = when (this) {
+    TuningProfile.Balanced -> BtSppTuning()
+    TuningProfile.Conservative -> BtSppTuning(connectTimeoutMs = 12_000, interChunkDelayMs = 15)
+    TuningProfile.Aggressive -> BtSppTuning(connectTimeoutMs = 8_000, interChunkDelayMs = 5)
+}
+
+// -------------------------------------------------------------------------------------------------
+// Small persisted driver settings wrapper backed by SettingsFacade (shared by all adapters).
+// -------------------------------------------------------------------------------------------------
+
+class FacadeDriverSettings(
+    private val facade: SettingsFacade,
+    private val scope: CoroutineScope,
+    handlerNamespace: String
+) : ScaleDeviceHandler.DriverSettings {
+
+    private val prefix = "ble/$handlerNamespace/"
+    private val mem = ConcurrentHashMap<String, String>()
+
+    override fun getInt(key: String, default: Int): Int {
+        val k = prefix + key
+        mem[k]?.toIntOrNull()?.let { return it }
+        val v = runCatching {
+            runBlocking(Dispatchers.IO) { withTimeout(300.milliseconds) { facade.observeSetting(k, default).first() } }
+        }.getOrElse { default }
+        mem[k] = v.toString()
+        return v
+    }
+
+    override fun putInt(key: String, value: Int) {
+        val k = prefix + key
+        mem[k] = value.toString()
+        scope.launch { facade.saveSetting(k, value) }
+    }
+
+    override fun getString(key: String, default: String?): String? {
+        val k = prefix + key
+        mem[k]?.let { return it }
+        val raw = runCatching {
+            runBlocking(Dispatchers.IO) { withTimeout(300.milliseconds) { facade.observeSetting(k, default ?: "").first() } }
+        }.getOrElse { default ?: "" }
+        val result = if (raw.isEmpty() && default == null) null else raw
+        result?.let { mem[k] = it }
+        return result
+    }
+
+    override fun putString(key: String, value: String) {
+        val k = prefix + key
+        mem[k] = value
+        scope.launch { facade.saveSetting(k, value) }
+    }
+
+    override fun remove(key: String) {
+        val k = prefix + key
+        mem.remove(k)
+        scope.launch { facade.saveSetting(k, "") }
+    }
+}
+
+// -------------------------------------------------------------------------------------------------
+// ModernScaleAdapter (abstract base)
+// - Owns app integration, user/measurements snapshots, event streams, handler wiring.
+// - Concrete subclasses implement link-specific connect/disconnect logic.
+// -------------------------------------------------------------------------------------------------
+
+@OptIn(ExperimentalCoroutinesApi::class)
+abstract class ModernScaleAdapter(
+    protected val context: android.content.Context,
+    protected val settingsFacade: SettingsFacade,
+    protected val measurementFacade: MeasurementFacade,
+    protected val userFacade: UserFacade,
+    protected val handler: ScaleDeviceHandler
+) : ScaleCommunicator, AutoCloseable {
+
+    protected val TAG = this::class.simpleName ?: "ModernScaleAdapter"
+
+    // ---- coroutine & lifecycle -----------------------------------------------------------------
+    protected val scope = CoroutineScope(Dispatchers.Default + SupervisorJob())
+    protected val mainHandler = Handler(Looper.getMainLooper())
+
+    // ---- session targeting ---------------------------------------------------------------------
+    protected var targetAddress: String? = null
+    protected var lastDisconnectAtMs: Long = 0L
+
+    // ---- UI streams ----------------------------------------------------------------------------
+    val _events = MutableSharedFlow<BluetoothEvent>(replay = 1, extraBufferCapacity = 8)
+    override fun getEventsFlow(): SharedFlow<BluetoothEvent> = _events.asSharedFlow()
+
+    protected val _isConnecting = MutableStateFlow(false)
+    override val isConnecting: StateFlow<Boolean> = _isConnecting.asStateFlow()
+
+    protected val _isConnected = MutableStateFlow(false)
+    override val isConnected: StateFlow<Boolean> = _isConnected.asStateFlow()
+
+    // ---- app snapshots for handler.DataProvider -------------------------------------------------
+    @Volatile protected var selectedUserSnapshot: ScaleUser? = null
+    @Volatile protected var usersSnapshot: List<ScaleUser> = emptyList()
+    @Volatile protected var lastSnapshot: Map<Int, ScaleMeasurement> = emptyMap()
+
+    init {
+        val driverSettings = FacadeDriverSettings(
+            facade = settingsFacade,
+            scope = scope,
+            handlerNamespace = handler.javaClass.simpleName
+        )
+        handler.attachSettings(driverSettings)
+
+        // Keep a *live* non-blocking snapshot of the current user.
+        scope.launch {
+            userFacade.observeSelectedUser().collect { u ->
+                selectedUserSnapshot = u?.let(::mapUser)
+            }
+        }
+        // Keep a *fresh enough* snapshot of users & their latest measurement.
+        scope.launch {
+            userFacade.observeAllUsers()
+                .flatMapLatest { users ->
+                    usersSnapshot = users.map(::mapUser)
+                    if (users.isEmpty()) {
+                        flowOf(emptyMap())
+                    } else {
+                        combine(users.map { u -> measurementFacade.getMeasurementsForUser(u.id) }) { lists ->
+                            val out = HashMap<Int, ScaleMeasurement>(users.size)
+                            users.forEachIndexed { idx, u ->
+                                val newest = lists[idx].maxByOrNull { it.measurement.timestamp }
+                                mapMeasurement(newest)?.let { out[u.id] = it }
+                            }
+                            out
+                        }
+                    }
+                }
+                .collect { latestMap -> lastSnapshot = latestMap }
+        }
+    }
+
+    // ---- ScaleCommunicator entry points ---------------------------------------------------------
+
+    /**
+     * Template method: base validates input & selected user, then calls [doConnect].
+     * Many handlers expect a selected user from app state;
+     */
+    final override fun connect(address: String, scaleUser: ScaleUser?) {
+        targetAddress = address
+        _isConnecting.value = true
+
+        scope.launch {
+            val user: ScaleUser? =
+                scaleUser
+                    ?: selectedUserSnapshot
+                    ?: withTimeoutOrNull(750.milliseconds) {
+                        userFacade.observeSelectedUser().first()
+                    }?.let(::mapUser)
+
+            if (user == null) {
+                _events.tryEmit(
+                    BluetoothEvent.ConnectionFailed(
+                        address,
+                        context.getString(R.string.bt_error_no_user_selected)
+                    )
+                )
+                _isConnecting.value = false
+                return@launch
+            }
+
+            runCatching {
+                doConnect(address, user)
+            }.onFailure { t ->
+                _events.tryEmit(
+                    BluetoothEvent.ConnectionFailed(
+                        address,
+                        t.message ?: "—"
+                    )
+                )
+                _isConnecting.value = false
+            }
+        }
+    }
+
+    /**
+     * Template method: calls [doDisconnect] and resets shared state.
+     */
+    final override fun disconnect() {
+        doDisconnect()
+        cleanup()
+    }
+
+    /**
+     * Default UX helper for devices that only push data via NOTIFY or broadcasts.
+     * Subclasses can override if they can actively trigger measurement on device.
+     */
+    override fun requestMeasurement() {
+        val addr = targetAddress ?: "unknown"
+        _events.tryEmit(
+            BluetoothEvent.DeviceMessage(
+                context.getString(R.string.bt_info_waiting_for_measurement),
+                addr
+            )
+        )
+    }
+
+    override suspend fun processUserInteractionFeedback(
+        interactionType: BluetoothEvent.UserInteractionType,
+        appUserId: Int,
+        feedbackData: Any
+    ) {
+        scope.launch {
+            runCatching {
+                handler.onUserInteractionFeedback(interactionType, appUserId, feedbackData)
+            }.onFailure { t ->
+                val addr = targetAddress ?: "unknown"
+                LogManager.e(TAG, "Delivering user feedback failed: ${t.message}", t)
+                _events.tryEmit(
+                    BluetoothEvent.DeviceMessage(
+                        context.getString(R.string.bt_error_delivery_user_feedback, t.message ?: "—"),
+                        addr
+                    )
+                )
+            }
+        }
+    }
+
+    // ---- abstract link hooks -------------------------------------------------------------------
+
+    protected abstract fun doConnect(address: String, selectedUser: ScaleUser)
+    protected abstract fun doDisconnect()
+
+    // ---- callbacks & data provider for handlers ------------------------------------------------
+
+    protected val appCallbacks = object : ScaleDeviceHandler.Callbacks {
+        override fun onPublish(measurement: ScaleMeasurement) {
+            val addr = targetAddress ?: "unknown"
+            _events.tryEmit(BluetoothEvent.MeasurementReceived(measurement, addr))
+        }
+
+        override fun onInfo(@StringRes resId: Int, vararg args: Any) {
+            val addr = targetAddress ?: "unknown"
+            _events.tryEmit(BluetoothEvent.DeviceMessage(context.getString(resId, *args), addr))
+        }
+
+        override fun onWarn(@StringRes resId: Int, vararg args: Any) {
+            val addr = targetAddress ?: "unknown"
+            _events.tryEmit(BluetoothEvent.DeviceMessage(context.getString(resId, *args), addr))
+        }
+
+        override fun onError(@StringRes resId: Int, t: Throwable?, vararg args: Any) {
+            val addr = targetAddress ?: "unknown"
+            val msg = context.getString(resId, *args)
+            LogManager.e(TAG, msg, t)
+            _events.tryEmit(BluetoothEvent.DeviceMessage(msg, addr))
+        }
+
+        override fun onUserInteractionRequired(interactionType: BluetoothEvent.UserInteractionType, data: Any?) {
+            val addr = targetAddress ?: "unknown"
+            _events.tryEmit(BluetoothEvent.UserInteractionRequired(addr, data, interactionType))
+        }
+
+        override fun resolveString(@StringRes resId: Int, vararg args: Any): String =
+            context.getString(resId, *args)
+    }
+
+    protected val dataProvider = object : ScaleDeviceHandler.DataProvider {
+        override fun currentUser(): ScaleUser = selectedUserSnapshot
+            ?: error("No selected user snapshot available")
+        override fun usersForDevice(): List<ScaleUser> = usersSnapshot
+        override fun lastMeasurementFor(userId: Int): ScaleMeasurement? = lastSnapshot[userId]
+    }
+
+    protected fun cleanup() {
+        _isConnected.value = false
+        _isConnecting.value = false
+        // keep targetAddress to allow higher layer to retry if wanted
+    }
+
+    override fun close() {
+        runCatching { scope.cancel() }
+    }
+
+    // ---- mapping helpers (core -> legacy DTOs used by handlers) --------------------------------
+
+    protected fun mapUser(u: User): ScaleUser =
+        ScaleUser().apply {
+            runCatching { id = u.id }
+            runCatching { userName = u.name }
+            when (val b = runCatching { u.birthDate }.getOrNull()) {
+                is Long -> birthday = Date(b)
+            }
+            runCatching { bodyHeight = u.heightCm }
+            runCatching { gender = u.gender }
+            runCatching { activityLevel = u.activityLevel }
+
+            runCatching {
+                runBlocking(scope.coroutineContext) {
+                    val userGoals = userFacade.getAllGoalsForUser(u.id).first()
+
+                    val goalWeightGoal = userGoals.find { it.measurementTypeId == MeasurementTypeKey.WEIGHT.id }
+                    if (goalWeightGoal != null) {
+                        val goalType = measurementFacade.getAllMeasurementTypes().first()
+                            .find { it.id == goalWeightGoal.measurementTypeId }
+
+                        if (goalType != null) {
+                            goalWeight = ConverterUtils.convertFloatValueUnit(
+                                value = goalWeightGoal.goalValue,
+                                fromUnit = goalType.unit,
+                                toUnit = UnitType.KG
+                            )
+                        }
+                    }
+
+                    val allMeasurements = measurementFacade.getMeasurementsForUser(u.id).first()
+
+                    val oldestWeightMeasurementValue = allMeasurements
+                        .sortedBy { it.measurement.timestamp }
+                        .firstNotNullOfOrNull { measurementWithValues ->
+                            measurementWithValues.values.find { it.type.key == MeasurementTypeKey.WEIGHT }
+                        }
+
+                    if (oldestWeightMeasurementValue != null) {
+                        initialWeight = ConverterUtils.convertFloatValueUnit(
+                            value = oldestWeightMeasurementValue.value.floatValue ?: 0f,
+                            fromUnit = oldestWeightMeasurementValue.type.unit,
+                            toUnit = UnitType.KG
+                        )
+                    }
+
+                    val allTypes = measurementFacade.getAllMeasurementTypes().first()
+
+                    val weightType = allTypes.find { it.key == MeasurementTypeKey.WEIGHT }
+                    if (weightType != null) {
+                        scaleUnit = weightType.unit.toWeightUnit()
+                    }
+                }
+            }
+        }
+
+    protected fun mapMeasurement(mwv: MeasurementWithValues?): ScaleMeasurement? {
+        if (mwv == null) return null
+        val m = ScaleMeasurement()
+        runCatching { m.userId = mwv.measurement.userId }
+        runCatching { m.dateTime = Date(mwv.measurement.timestamp) }
+
+        fun valueOf(key: MeasurementTypeKey): MeasurementValue? =
+            mwv.values.firstOrNull { it.type.key == key }?.value
+
+        valueOf(MeasurementTypeKey.WEIGHT)?.let { m.weight = it.floatValue ?: 0f }
+        valueOf(MeasurementTypeKey.BODY_FAT)?.let { m.fat = it.floatValue ?: 0f }
+        valueOf(MeasurementTypeKey.WATER)?.let { m.water = it.floatValue ?: 0f }
+        valueOf(MeasurementTypeKey.MUSCLE)?.let { m.muscle = it.floatValue ?: 0f }
+        valueOf(MeasurementTypeKey.VISCERAL_FAT)?.let { m.visceralFat = it.floatValue ?: 0f }
+        valueOf(MeasurementTypeKey.LBM)?.let { m.lbm = it.floatValue ?: 0f }
+        valueOf(MeasurementTypeKey.BONE)?.let { m.bone = it.floatValue ?: 0f }
+
+        return m
+    }
+
+    /** Pretty print a few leading bytes of a payload for logs. */
+    fun ByteArray.toHexPreview(limit: Int): String {
+        if (limit <= 0 || isEmpty()) return "(payload ${size}b)"
+        val show = min(size, limit)
+        val sb = StringBuilder("payload=[")
+        for (i in 0 until show) {
+            if (i > 0) sb.append(' ')
+            sb.append(String.format("%02X", this[i]))
+        }
+        if (size > limit) sb.append(" …(+").append(size - limit).append("b)")
+        sb.append(']')
+        return sb.toString()
+    }
+}

app/src/main/java/com/health/openscale/core/bluetooth/scales/ScaleDeviceHandler.kt

@@ -0,0 +1,410 @@
+/*
+ * openScale
+ * Copyright (C) 2025 olie.xdev <olie.xdeveloper@googlemail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.health.openscale.core.bluetooth.scales
+
+import android.bluetooth.le.ScanResult
+import androidx.annotation.StringRes
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.AutoGraph
+import androidx.compose.material.icons.filled.FitnessCenter
+import androidx.compose.material.icons.filled.Group
+import androidx.compose.material.icons.filled.History
+import androidx.compose.material.icons.filled.Schedule
+import androidx.compose.material.icons.filled.Tune
+import androidx.compose.material.icons.outlined.BatteryStd
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.res.stringResource
+import eu.brassepc.fitnessdroid.R
+import com.health.openscale.core.bluetooth.BluetoothEvent.UserInteractionType
+import com.health.openscale.core.bluetooth.data.ScaleMeasurement
+import com.health.openscale.core.bluetooth.data.ScaleUser
+import com.health.openscale.core.service.ScannedDeviceInfo
+import com.health.openscale.core.utils.LogManager
+import com.welie.blessed.BluetoothPeripheral
+import kotlinx.coroutines.CoroutineScope
+import java.util.UUID
+import kotlin.math.min
+
+/**
+ * What a handler declares about a device it supports.
+ *
+ * @property displayName Human-friendly name shown in the UI (e.g., "Yunmai Mini").
+ * @property capabilities Features the device *can* support in theory.
+ * @property implemented  Features this handler actually implements today (may be a subset).
+ * @property tuningProfile Optional link timing/retry preferences (see [TuningProfile]).
+ * @property linkMode     Whether the device uses GATT or broadcast-only advertisements.
+ */
+data class DeviceSupport(
+    val displayName: String,
+    val capabilities: Set<DeviceCapability>,
+    val implemented: Set<DeviceCapability>,
+    val tuningProfile: TuningProfile = TuningProfile.Balanced,
+    val linkMode: LinkMode = LinkMode.CONNECT_GATT
+)
+
+/** High-level capabilities a scale might offer. */
+enum class DeviceCapability(
+    @param:StringRes val labelRes: Int,
+    val icon: ImageVector
+) {
+    BODY_COMPOSITION( R.string.cap_body_composition, Icons.Filled.FitnessCenter ),
+    TIME_SYNC(        R.string.cap_time_sync,        Icons.Filled.Schedule ),
+    USER_SYNC(        R.string.cap_user_sync,        Icons.Filled.Group ),
+    HISTORY_READ(     R.string.cap_history_read,     Icons.Filled.History ),
+    LIVE_WEIGHT_STREAM(R.string.cap_live_weight,     Icons.Filled.AutoGraph ),
+    UNIT_CONFIG(      R.string.cap_unit_config,      Icons.Filled.Tune ),
+    BATTERY_LEVEL(    R.string.cap_battery,          Icons.Outlined.BatteryStd )
+}
+
+/**
+ * Defines whether a device communicates via a GATT connection
+ * or only via broadcast advertisements.
+ */
+enum class LinkMode { CONNECT_GATT, BROADCAST_ONLY, CLASSIC_SPP }
+
+/**
+ * Signals how the handler consumed an advertisement.
+ * - IGNORED: payload not relevant; adapter keeps scanning silently.
+ * - CONSUMED_KEEP_SCANNING: payload processed, but we want to continue scanning (e.g., waiting for stability).
+ * - CONSUMED_STOP: final payload processed; adapter should stop scanning and finish the session.
+ */
+enum class BroadcastAction { IGNORED, CONSUMED_KEEP_SCANNING, CONSUMED_STOP }
+
+/**
+ * # ScaleDeviceHandler
+ *
+ * Minimal base class for a **device-specific** BLE protocol handler.
+ *
+ * For GATT devices, the app (via `ModernScaleAdapter`) injects a BLE [Transport] and [Callbacks],
+ * then calls [onConnected] and forwards notifications to [onNotification].
+ *
+ * For broadcast-only devices, the adapter attaches a **no-op** transport and forwards
+ * advertisement frames to [onAdvertisement]. The handler can call [publish] to emit results.
+ *
+ * Threading: the adapter serializes and paces BLE I/O. Avoid sleeps or blocking work inside your
+ * handler; just call the helpers in the order your protocol requires.
+ */
+abstract class ScaleDeviceHandler {
+    val TAG = this::class.simpleName ?: "ScaleDeviceHandler"
+
+    companion object {
+        // Pseudo UUIDs for Classic/SPP
+        val CLASSIC_DATA_UUID: UUID =
+            UUID.fromString("00000000-0000-0000-0000-00000000C1A5")
+    }
+    /**
+     * Identify whether this handler supports the given scanned device.
+     * Return a [DeviceSupport] description if yes, or `null` if not.
+     */
+    abstract fun supportFor(device: ScannedDeviceInfo): DeviceSupport?
+
+    /**
+     * Optional UI component for device-specific settings.
+     * Override this in concrete handlers to show custom input fields.
+     */
+    @Composable
+    open fun DeviceConfigurationUi() {
+        // Default message when no specific configuration is required
+        Box(
+            modifier = Modifier.fillMaxWidth(),
+            contentAlignment = Alignment.Center
+        ) {
+            Text(
+                text = stringResource(R.string.no_special_configuration_available),
+                style = MaterialTheme.typography.bodyMedium,
+                color = MaterialTheme.colorScheme.onSurfaceVariant
+            )
+        }
+    }
+
+    // --- Lifecycle entry points called by the adapter -------------------------
+
+    internal fun attachSettings(settings: DriverSettings) {
+        this.settings = settings
+    }
+
+    internal fun attach(transport: Transport, callbacks: Callbacks, settings: DriverSettings, data: DataProvider, scope: CoroutineScope) {
+        this.transport = transport
+        this.callbacks = callbacks
+        this.settings = settings
+        this.data = data
+        this._scope = scope
+        logD("attach()")
+    }
+
+    internal fun handleConnected(user: ScaleUser) {
+        logD("handleConnected(userId=${user.id}, height=${user.bodyHeight}, age=${user.age})")
+        try {
+            onConnected(user)
+        } catch (t: Throwable) {
+            logE("onConnected failed: ${t.message}", t)
+            callbacks?.onError(
+                R.string.bt_error_handler_connect_failed,
+                t,
+                t.message ?: "—"
+            )
+        }
+    }
+
+    internal fun handleNotification(characteristic: UUID, data: ByteArray) {
+        val u = currentAppUser()
+        try {
+            onNotification(characteristic, data, u)
+        } catch (t: Throwable) {
+            logE("onNotification failed for $characteristic: ${t.message}", t)
+            callbacks?.onError(
+                R.string.bt_error_handler_parse_error,
+                t,
+                characteristic.toString(),
+                t.message ?: "—"
+            )
+        }
+    }
+
+    internal fun handleDisconnected() {
+        logD("handleDisconnected()")
+        try {
+            onDisconnected()
+        } catch (t: Throwable) {
+            logW("onDisconnected threw: ${t.message}")
+        } finally {
+        }
+    }
+
+    internal fun detach() {
+        logD("detach()")
+        transport = null
+        callbacks = null
+    }
+
+    // --- To be implemented by concrete handlers --------------------------------
+
+    /** Called after services are discovered and the link is ready for I/O (GATT devices only). */
+    protected open fun onConnected(user: ScaleUser) = Unit
+
+    /** Called for each incoming notification (GATT devices only). */
+    protected open fun onNotification(characteristic: UUID, data: ByteArray, user: ScaleUser) = Unit
+
+    /** Optional cleanup hook. */
+    protected open fun onDisconnected() = Unit
+
+    /**
+     * Called for each advertisement seen for the target device (broadcast-only devices).
+     * Default implementation ignores the advertisement.
+     */
+    open fun onAdvertisement(result: ScanResult, user: ScaleUser): BroadcastAction = BroadcastAction.IGNORED
+
+    // --- Protected helper methods (use these from your handler) ----------------
+
+    /** Enable notifications for a characteristic. */
+    protected fun setNotifyOn(service: UUID, characteristic: UUID) {
+        transport?.setNotifyOn(service, characteristic)
+            ?: logW("setNotifyOn called without transport")
+    }
+
+    /**
+     * Write a command to a characteristic.
+     * @param withResponse true for `Write With Response` (default), false for `Write Without Response`.
+     */
+    protected fun writeTo(
+        service: UUID,
+        characteristic: UUID,
+        payload: ByteArray,
+        withResponse: Boolean = true
+    ) {
+        transport?.write(service, characteristic, payload, withResponse)
+            ?: logW("writeTo called without transport")
+    }
+
+    /** Read a characteristic (rare for scales; most data comes via NOTIFY). */
+    protected fun readFrom(service: UUID, characteristic: UUID) {
+        transport?.read(service, characteristic)
+            ?: logW("readFrom called without transport")
+    }
+
+    /** Publish a fully parsed measurement to the app. */
+    protected fun publish(measurement: ScaleMeasurement) {
+        logI("\u2190 publish measurement to app")
+        callbacks?.onPublish(measurement)
+            ?: logW("publish called without callbacks")
+    }
+
+    /** Ask the adapter to terminate the link. */
+    protected fun requestDisconnect() {
+        logD("\u2192 request BLE disconnect")
+        transport?.disconnect()
+    }
+
+    fun hasCharacteristic(service: UUID, characteristic: UUID): Boolean {
+        val hasUUID = transport?.hasCharacteristic(service, characteristic) ?: false
+        if (!hasUUID)
+            logD("hasCharacteristic: $service/$characteristic → false")
+        return hasUUID
+    }
+
+    protected fun getPeripheral(): BluetoothPeripheral? {
+        return transport?.getPeripheral()
+    }
+
+    /** Helper to build a 16-bit Bluetooth Base UUID (e.g., `uuid16(0xFFE4)`). */
+    protected fun uuid16(short: Int): UUID =
+        UUID.fromString(String.format("0000%04x-0000-1000-8000-00805f9b34fb", short))
+
+    protected fun resolveString(@StringRes resId: Int, vararg args: Any): String =
+        callbacks?.resolveString(resId, *args) ?: "res:$resId"
+
+    protected fun settingsGetInt(key: String, default: Int = -1): Int = settings.getInt(key, default)
+    protected fun settingsPutInt(key: String, value: Int) { settings.putInt(key, value) }
+
+    protected fun settingsGetString(key: String, default: String? = null): String? = settings.getString(key, default)
+    protected fun settingsPutString(key: String, value: String) { settings.putString(key, value) }
+
+    protected fun currentAppUser(): ScaleUser = data.currentUser()
+    protected fun usersForDevice(): List<ScaleUser> = data.usersForDevice()
+    protected fun lastMeasurementFor(userId: Int): ScaleMeasurement? = data.lastMeasurementFor(userId)
+
+    // --- Logging shortcuts (route to LogManager under a single TAG) ------------
+
+    protected fun logD(msg: String) = LogManager.d(TAG, msg)
+    protected fun logI(msg: String) = LogManager.i(TAG, msg)
+    protected fun logW(msg: String) = LogManager.w(TAG, msg, null)
+    protected fun logE(msg: String, t: Throwable? = null) = LogManager.e(TAG, msg, t)
+
+    // Human-readable messages for users (e.g., snackbars/toasts)
+    protected fun userInfo(@StringRes resId: Int, vararg args: Any) {
+        callbacks?.onInfo(resId, *args) ?: logD("userInfo dropped: res=$resId")
+    }
+    protected fun userWarn(@StringRes resId: Int, vararg args: Any) {
+        callbacks?.onWarn(resId, *args) ?: logW("userWarn dropped: res=$resId")
+    }
+    protected fun userError(@StringRes resId: Int, vararg args: Any, t: Throwable? = null) {
+        callbacks?.onError(resId, t, *args) ?: logE("userError dropped: res=$resId", t)
+    }
+
+    protected fun requestUserInteraction(
+        interactionType: UserInteractionType,
+        data: Any?
+    ) {
+        callbacks?.onUserInteractionRequired(interactionType, data)
+            ?: logW("requestUserInteraction dropped: $interactionType")
+    }
+
+    open suspend fun onUserInteractionFeedback(
+        interactionType: UserInteractionType,
+        appUserId: Int,
+        feedbackData: Any) { /* no-op */ }
+
+    // --- Wiring provided by the adapter ---------------------------------------
+
+    private var transport: Transport? = null
+    private var callbacks: Callbacks? = null
+    private lateinit var settings: DriverSettings
+    private lateinit var data: DataProvider
+    private var _scope: CoroutineScope? = null
+
+    /**
+     * Lifecycle-bound coroutine scope provided by the adapter (cancelled when the communicator
+     * is closed). Handlers that need timeout/fallback coroutines should use this instead of
+     * creating their own scope. Valid after [attach] — i.e. inside onConnected/onNotification.
+     */
+    protected val scope: CoroutineScope
+        get() = _scope ?: error("ScaleDeviceHandler.scope accessed before attach()")
+    /**
+     * BLE transport the adapter provides. No threading/queueing implied here—
+     * the adapter already serializes and paces I/O.
+     */
+    interface Transport {
+        fun setNotifyOn(service: UUID, characteristic: UUID)
+        fun write(service: UUID, characteristic: UUID, payload: ByteArray, withResponse: Boolean = true)
+        fun read(service: UUID, characteristic: UUID)
+        fun disconnect()
+        fun getPeripheral(): BluetoothPeripheral? = null
+        fun hasCharacteristic(service: UUID, characteristic: UUID): Boolean
+    }
+
+    // ----- DataProvider: live app data the handler can query -----
+    interface DataProvider {
+        /** Currently selected app user (may be null if none). */
+        fun currentUser(): ScaleUser
+
+        /** Fresh snapshot of app users that are relevant for this device. */
+        fun usersForDevice(): List<ScaleUser>
+
+        /** Latest saved measurement for the given user (or null if none). */
+        fun lastMeasurementFor(userId: Int): ScaleMeasurement?
+    }
+
+    interface DriverSettings {
+        fun getInt(key: String, default: Int = -1): Int
+        fun putInt(key: String, value: Int)
+
+        fun getString(key: String, default: String? = null): String?
+        fun putString(key: String, value: String)
+
+        fun remove(key: String)
+    }
+
+    /** App callbacks to emit parsed results and user-visible messages. */
+    interface Callbacks {
+        fun onPublish(measurement: ScaleMeasurement)
+        fun onInfo(@StringRes resId: Int, vararg args: Any) { /* optional */ }
+        fun onWarn(@StringRes resId: Int, vararg args: Any) { /* optional */ }
+        fun onError(@StringRes resId: Int, t: Throwable? = null, vararg args: Any) { /* optional */ }
+
+        fun onUserInteractionRequired(interactionType: UserInteractionType, data: Any?) { /* optional */ }
+        fun resolveString(@StringRes resId: Int, vararg args: Any): String
+    }
+
+    // --- Small utils -----------------------------------------------------------
+
+    /** Pretty print a few leading bytes of a payload for logs. */
+    fun ByteArray.toHexPreview(limit: Int): String {
+        if (limit <= 0 || isEmpty()) return "(payload ${size}b)"
+        val show = min(size, limit)
+        val sb = StringBuilder("payload=[")
+        for (i in 0 until show) {
+            if (i > 0) sb.append(' ')
+            sb.append(String.format("%02X", this[i]))
+        }
+        if (size > limit) sb.append(" …(+").append(size - limit).append("b)")
+        sb.append(']')
+        return sb.toString()
+    }
+
+    /**
+     * ASCII preview of the first `max` bytes; non-printable bytes are rendered as '?'.
+     */
+    fun ByteArray.toAsciiPreview(max: Int = 64): String {
+        if (isEmpty()) return ""
+        val n = min(size, max)
+        val sb = StringBuilder(n)
+        for (i in 0 until n) {
+            val ch = (this[i].toInt() and 0xFF).toChar()
+            sb.append(if (ch.isISOControl()) '?' else ch)
+        }
+        if (size > max) sb.append("…(+").append(size - max).append("b)")
+        return sb.toString()
+    }
+}

app/src/main/java/com/health/openscale/core/bluetooth/scales/SppScaleAdapter.kt

@@ -0,0 +1,324 @@
+/*
+ * openScale
+ * Copyright (C) 2025 olie.xdev <olie.xdeveloper@googlemail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.health.openscale.core.bluetooth.scales
+
+import android.annotation.SuppressLint
+import android.bluetooth.BluetoothAdapter
+import android.bluetooth.BluetoothDevice
+import android.bluetooth.BluetoothManager
+import android.bluetooth.BluetoothSocket
+import android.content.Context
+import android.os.SystemClock
+import androidx.compose.runtime.Composable
+import androidx.core.content.getSystemService
+import eu.brassepc.fitnessdroid.R
+import com.health.openscale.core.bluetooth.BluetoothEvent
+import com.health.openscale.core.bluetooth.data.ScaleUser
+import com.health.openscale.core.facade.MeasurementFacade
+import com.health.openscale.core.facade.SettingsFacade
+import com.health.openscale.core.facade.UserFacade
+import com.health.openscale.core.utils.LogManager
+import com.welie.blessed.BluetoothPeripheral
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.isActive
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
+import kotlinx.coroutines.withContext
+import java.io.InputStream
+import java.io.OutputStream
+import java.util.UUID
+import kotlin.math.min
+import kotlin.time.Duration.Companion.milliseconds
+
+/**
+ * SPP (Bluetooth Classic / RFCOMM) adapter that plugs a [ScaleDeviceHandler] into a raw byte stream.
+ *
+ * Tuning usage:
+ * - Reconnect cooldown between attempts (common.reconnectCooldownMs)
+ * - Bounded retry on initial connect (common.maxRetries + common.retryBackoffMs)
+ * - Connect timeout (connectTimeoutMs)
+ * - Chunked writes (writeChunkBytes + interChunkDelayMs)
+ * - Small settle delay after connect (derived from interChunkDelayMs)
+ */
+class SppScaleAdapter(
+    context: Context,
+    settingsFacade: SettingsFacade,
+    measurementFacade: MeasurementFacade,
+    userFacade: UserFacade,
+    handler: ScaleDeviceHandler,
+    profile: TuningProfile = TuningProfile.Balanced
+) : ModernScaleAdapter(context, settingsFacade, measurementFacade, userFacade, handler) {
+
+    private val tuning: BtSppTuning = profile.forSpp()
+
+    private var sppSocket: BluetoothSocket? = null
+    private var sppReaderJob: Job? = null
+    private var sppIn: InputStream? = null
+    private var sppOut: OutputStream? = null
+
+    private val writeMutex = Mutex()
+
+    @Composable
+    override fun DeviceConfigurationUi() {
+        // Delegate to the actual protocol handler
+        handler.DeviceConfigurationUi()
+    }
+
+    @SuppressLint("MissingPermission")
+    override fun doConnect(address: String, selectedUser: ScaleUser) {
+        val btManager: BluetoothManager? = context.getSystemService()
+        val adapter: BluetoothAdapter? = btManager?.adapter
+
+        if (adapter == null) {
+            _events.tryEmit(BluetoothEvent.ConnectionFailed(address, context.getString(R.string.bt_error_no_bluetooth_adapter)))
+            return
+        }
+
+        val device: BluetoothDevice = try {
+            adapter.getRemoteDevice(address)
+        } catch (_: Throwable) {
+            _events.tryEmit(BluetoothEvent.ConnectionFailed(address, context.getString(R.string.bt_error_no_device_found)))
+            return
+        }
+
+        _isConnecting.value = true
+        _isConnected.value = false
+
+        scope.launch(Dispatchers.IO) {
+            // Cooldown between attempts
+            val since = SystemClock.elapsedRealtime() - lastDisconnectAtMs
+            if (since in 1 until tuning.common.reconnectCooldownMs) {
+                delay((tuning.common.reconnectCooldownMs - since).milliseconds)
+            }
+
+            safeCancelDiscovery(adapter)
+
+            var attempt = 0
+            while (isActive) {
+                try {
+                    LogManager.i(TAG, "Attempting SPP connection (attempt ${attempt + 1})")
+                    val socket = device.createRfcommSocketToServiceRecord(ScaleDeviceHandler.CLASSIC_DATA_UUID)
+                    sppSocket = socket
+
+                    // --- Connect with manual timeout guard ---
+                    var connected = false
+                    // Start the blocking connect() in a child job
+                    val connectJob = launch(Dispatchers.IO) {
+                        socket.connect() // blocking call
+                        connected = true
+                        LogManager.i(TAG, "SPP connect() succeeded")
+                    }
+                    // Start a guard that closes the socket if connect takes too long
+                    val guardJob = launch(Dispatchers.IO) {
+                        val to = tuning.connectTimeoutMs
+                        if (to > 0) {
+                            delay(to.milliseconds)
+                            if (!connected) {
+                                LogManager.w(TAG, "Connect timeout reached ($to ms), closing socket")
+                                // Force the connect() to abort by closing the socket
+                                runCatching { socket.close() }
+                            }
+                        }
+                    }
+
+                    // Wait until either connect finishes or guard closes the socket
+                    connectJob.join()
+                    guardJob.cancel()
+
+                    // If connect failed, connect() would have thrown and we’d be in catch{}
+                    sppIn = socket.inputStream
+                    sppOut = socket.outputStream
+
+                    // Small settle delay before wiring the handler
+                    val settleDelay = maxOf(50L, tuning.interChunkDelayMs * 3)
+                    delay(settleDelay.milliseconds)
+
+                    _isConnecting.value = false
+                    _isConnected.value = true
+
+                    val name = safeDeviceName(device)
+                    val addr = safeDeviceAddress(device)
+                    LogManager.i(TAG, "Connected to device $name [$addr]")
+                    _events.tryEmit(BluetoothEvent.Connected(name, addr))
+
+                    // Attach handler
+                    val driverSettings = FacadeDriverSettings(
+                        facade = settingsFacade,
+                        scope = scope,
+                        handlerNamespace = handler::class.simpleName ?: "Handler"
+                    )
+                    handler.attach(sppTransport, appCallbacks, driverSettings, dataProvider, scope)
+                    handler.handleConnected(selectedUser)
+
+                    // Reader loop (idle-timeout via available()+delay)
+                    sppReaderJob = launch(Dispatchers.IO) {
+                        val buf = ByteArray(1024)
+                        var lastRx = SystemClock.elapsedRealtime()
+                        try {
+                            while (isActive) {
+                                val ins = sppIn ?: break
+                                val avail = runCatching { ins.available() }.getOrDefault(0)
+
+                                if (avail > 0) {
+                                    val n = ins.read(buf, 0, min(buf.size, avail))
+                                    if (n <= 0) break
+                                    lastRx = SystemClock.elapsedRealtime()
+                                    val payload = buf.copyOf(n)
+                                    LogManager.d(TAG, "Received $n bytes from SPP ${payload.toHexPreview(24)}")
+                                    handler.handleNotification(ScaleDeviceHandler.CLASSIC_DATA_UUID, payload)
+                                } else {
+                                    delay(50.milliseconds)
+                                    val idle = SystemClock.elapsedRealtime() - lastRx
+                                    if (tuning.readTimeoutMs > 0 && idle >= tuning.readTimeoutMs) {
+                                        LogManager.w(TAG, "Read idle timeout reached, disconnecting")
+                                        sppTransport.disconnect()
+                                        break
+                                    }
+                                }
+                            }
+                        } catch (t: Throwable) {
+                            LogManager.w(TAG, "SPP read error: ${t.message}", t)
+                        } finally {
+                            withContext(Dispatchers.Main) {
+                                val da = safeDeviceAddress(device)
+                                LogManager.i(TAG, "Reader loop finished, emitting disconnect")
+                                _events.tryEmit(BluetoothEvent.Disconnected(da, "SPP stream closed"))
+                                lastDisconnectAtMs = SystemClock.elapsedRealtime()
+                                cleanup()
+                                doDisconnect()
+                            }
+                        }
+                    }
+
+                    // success → exit retry loop
+                    break
+                } catch (t: Throwable) {
+                    attempt++
+                    LogManager.e(TAG, "SPP connect failed (attempt $attempt/${tuning.common.maxRetries}): ${t.message}", t)
+
+                    if (attempt <= tuning.common.maxRetries) {
+                        _events.tryEmit(
+                            BluetoothEvent.DeviceMessage(
+                                context.getString(R.string.bt_info_reconnecting_try, attempt, tuning.common.maxRetries),
+                                address
+                            )
+                        )
+                        delay(tuning.common.retryBackoffMs.milliseconds)
+                        safeCancelDiscovery(adapter)
+                        continue
+                    } else {
+                        _events.tryEmit(BluetoothEvent.ConnectionFailed(address, t.message ?: "SPP connect failed"))
+                        lastDisconnectAtMs = SystemClock.elapsedRealtime()
+                        cleanup()
+                        doDisconnect()
+                        break
+                    }
+                }
+            }
+        }
+    }
+
+
+    override fun doDisconnect() {
+        sppReaderJob?.cancel(); sppReaderJob = null
+        runCatching { sppIn?.close() };   sppIn = null
+        runCatching { sppOut?.close() };  sppOut = null
+        runCatching { sppSocket?.close() }; sppSocket = null
+        runCatching { handler.handleDisconnected() }
+        runCatching { handler.detach() }
+        _isConnected.value = false
+        _isConnecting.value = false
+        lastDisconnectAtMs = SystemClock.elapsedRealtime()
+    }
+
+    // --- Transport exposed to the handler --------------------------------------------------------
+
+    private val sppTransport = object : ScaleDeviceHandler.Transport {
+        override fun setNotifyOn(service: UUID, characteristic: UUID) {
+            // Not applicable for SPP: stream is always "notifying"
+        }
+
+        override fun write(service: UUID, characteristic: UUID, payload: ByteArray, withResponse: Boolean) {
+            // RFCOMM is a stream; we still pace writes and chunk large payloads
+            scope.launch(Dispatchers.IO) {
+                writeMutex.withLock {
+                    try {
+                        LogManager.d(TAG, "Starting write of ${payload.size} bytes to SPP: ${payload.toHexPreview(24)}")
+                        val chunk = maxOf(1, tuning.writeChunkBytes)
+                        var i = 0
+                        while (i < payload.size) {
+                            val end = min(i + chunk, payload.size)
+                            sppOut?.write(payload, i, end - i)
+                            sppOut?.flush()
+                            val writtenChunk = payload.copyOfRange(i, end)
+                            LogManager.d(TAG, "Wrote chunk ${i / chunk + 1}: ${writtenChunk.toHexPreview(16)}")
+                            i = end
+                            if (i < payload.size && tuning.interChunkDelayMs > 0) {
+                                delay(tuning.interChunkDelayMs.milliseconds)
+                            }
+                        }
+                        LogManager.i(TAG, "Finished writing ${payload.size} bytes to SPP")
+                    } catch (t: Throwable) {
+                        LogManager.e(TAG, "SPP write failed: ${t.message}", t)
+                        appCallbacks.onWarn(R.string.bt_warn_write_failed_status,"SPP",t.message ?: "write failed")
+                    }
+                }
+            }
+        }
+
+        override fun read(service: UUID, characteristic: UUID) {
+            // Not applicable for SPP; reads are handled by the continuous reader loop
+        }
+
+        override fun disconnect() {
+            doDisconnect()
+        }
+
+        override fun getPeripheral(): BluetoothPeripheral? = null
+
+        override fun hasCharacteristic(
+            service: UUID,
+            characteristic: UUID
+        ): Boolean {
+            // Not applicable for SPP
+            return false
+        }
+    }
+
+    // --- Helpers with defensive permission handling ---------------------------------------------
+
+    @SuppressLint("MissingPermission")
+    private fun safeCancelDiscovery(adapter: BluetoothAdapter) {
+        try {
+            if (adapter.isDiscovering) adapter.cancelDiscovery()
+        } catch (se: SecurityException) {
+            LogManager.w(TAG, "cancelDiscovery blocked by missing permission", se)
+        }
+    }
+
+    @SuppressLint("MissingPermission")
+    private fun safeDeviceName(device: BluetoothDevice): String =
+        try { device.name } catch (_: SecurityException) { null } ?: "Unknown"
+
+    @SuppressLint("MissingPermission")
+    private fun safeDeviceAddress(device: BluetoothDevice): String =
+        try { device.address } catch (_: SecurityException) { "unknown" }
+}

app/src/main/java/com/health/openscale/core/data/Enums.kt

@@ -0,0 +1,180 @@
+/*
+ * openScale
+ * Copyright (C) 2025 olie.xdev <olie.xdeveloper@googlemail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * FitnessDroid: nedbantad kopia av openScales Enums.kt — bara det som
+ * bluetooth-drivrutinerna behöver (strängresurser/ikoner urplockade).
+ */
+package com.health.openscale.core.data
+
+enum class GenderType {
+    MALE,
+    FEMALE;
+
+    fun isMale(): Boolean {
+        return this == MALE
+    }
+}
+
+enum class ActivityLevel {
+    SEDENTARY, MILD, MODERATE, HEAVY, EXTREME;
+
+    fun toInt(): Int {
+        when (this) {
+            SEDENTARY -> return 0
+            MILD -> return 1
+            MODERATE -> return 2
+            HEAVY -> return 3
+            EXTREME -> return 4
+        }
+    }
+
+    companion object {
+        @JvmStatic
+        fun fromInt(unit: Int): ActivityLevel {
+            when (unit) {
+                0 -> return SEDENTARY
+                1 -> return MILD
+                2 -> return MODERATE
+                3 -> return HEAVY
+                4 -> return EXTREME
+            }
+            return SEDENTARY
+        }
+    }
+}
+
+enum class WeightUnit {
+    KG, LB, ST;
+
+    override fun toString(): String {
+        when (this) {
+            LB -> return "lb"
+            ST -> return "st"
+            KG -> return "kg"
+        }
+    }
+
+    fun toInt(): Int {
+        when (this) {
+            LB -> return 1
+            ST -> return 2
+            KG -> return 0
+        }
+    }
+
+    companion object {
+        @JvmStatic
+        fun fromInt(unit: Int): WeightUnit {
+            when (unit) {
+                1 -> return LB
+                2 -> return ST
+                else -> return KG
+            }
+        }
+    }
+}
+
+enum class MeasurementTypeKey(val id: Int) {
+    WEIGHT(1),
+    BMI(2),
+    BODY_FAT(3),
+    WATER(4),
+    MUSCLE(5),
+    LBM(6),
+    BONE(7),
+    WAIST(8),
+    WHR(9),
+    WHTR(10),
+    HIPS(11),
+    VISCERAL_FAT(12),
+    CHEST(13),
+    THIGH(14),
+    BICEPS(15),
+    NECK(16),
+    CALIPER_1(17),
+    CALIPER_2(18),
+    CALIPER_3(19),
+    CALIPER(20),
+    BMR(21),
+    TDEE(22),
+    HEART_RATE(23),
+    CALORIES(24),
+    DATE(25),
+    TIME(26),
+    COMMENT(27),
+    USER(28),
+    IMPEDANCE(29),
+    IMPEDANCE_LOW(30),
+    ECW(31),
+    ICW(32),
+    PROTEIN(33),
+    BCM(34),
+    CUSTOM(99);
+}
+
+enum class MeasureUnit {
+    CM, INCH;
+
+    override fun toString(): String {
+        when (this) {
+            CM -> return "cm"
+            INCH -> return "in"
+        }
+    }
+
+    fun toInt(): Int {
+        when (this) {
+            CM -> return 0
+            INCH -> return 1
+        }
+    }
+
+    companion object {
+        @JvmStatic
+        fun fromInt(unit: Int): MeasureUnit {
+            when (unit) {
+                1 -> return INCH
+                else -> return CM
+            }
+        }
+    }
+}
+
+enum class UnitType(val displayName: String) {
+    KG("kg"),
+    LB("lb"),
+    ST("st"),
+    PERCENT("%"),
+    CM("cm"),
+    INCH("in"),
+    KCAL("kcal"),
+    BPM("bpm"),
+    OHM("Ω"),
+    NONE("");
+
+    fun isWeightUnit(): Boolean {
+        return this == KG || this == LB || this == ST
+    }
+
+    fun toWeightUnit(): WeightUnit {
+        return when (this) {
+            LB -> WeightUnit.LB
+            ST -> WeightUnit.ST
+            else -> WeightUnit.KG
+        }
+    }
+}

app/src/main/java/com/health/openscale/core/data/User.kt

@@ -0,0 +1,39 @@
+/*
+ * FitnessDroid-shim för openScales User-entitet (upstream är en Room-entitet).
+ * Bara fälten som bluetooth-adaptrarnas mapUser() läser.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ */
+package com.health.openscale.core.data
+
+data class User(
+    val id: Int = 1,
+    val name: String = "",
+    /** Födelsedag i epoch-millis (null = okänd) */
+    val birthDate: Long? = null,
+    /** Längd i cm */
+    val heightCm: Float = -1f,
+    val gender: GenderType = GenderType.MALE,
+    val activityLevel: ActivityLevel = ActivityLevel.SEDENTARY,
+)
+
+/** Målvikt m.m. — används av mapUser(); FitnessDroid har inga mål ännu. */
+data class Goal(
+    val measurementTypeId: Int,
+    val goalValue: Float,
+)
+
+/** Mättyp med enhet — används för att avgöra vågens viktenhet. */
+data class MeasurementType(
+    val id: Int,
+    val key: MeasurementTypeKey,
+    val unit: UnitType,
+)
+
+/** Ett enskilt mätvärde. */
+data class MeasurementValue(
+    val floatValue: Float?,
+)

app/src/main/java/com/health/openscale/core/facade/Facades.kt

@@ -0,0 +1,86 @@
+/*
+ * FitnessDroid-shims för openScales facades (upstream pratar med Room +
+ * inställningssystem). Här backas de av DataStore respektive appens profil,
+ * med exakt den yta som bluetooth-paketet använder:
+ *
+ *  - SettingsFacade: drivrutinernas key/value-inställningar + tuning-profil
+ *  - UserFacade: aktuell användare (längd/ålder/kön) som drivrutinerna behöver
+ *  - MeasurementFacade: senaste mätningar (används av vissa drivrutiner för
+ *    igenkänning av användare) — tom tills vidare
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ */
+package com.health.openscale.core.facade
+
+import android.content.Context
+import androidx.datastore.preferences.core.edit
+import androidx.datastore.preferences.core.intPreferencesKey
+import androidx.datastore.preferences.core.stringPreferencesKey
+import androidx.datastore.preferences.preferencesDataStore
+import com.health.openscale.core.data.Goal
+import com.health.openscale.core.data.MeasurementType
+import com.health.openscale.core.data.MeasurementTypeKey
+import com.health.openscale.core.data.UnitType
+import com.health.openscale.core.data.User
+import com.health.openscale.core.model.MeasurementWithValues
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.flowOf
+import kotlinx.coroutines.flow.map
+
+private val Context.driverDataStore by preferencesDataStore(name = "openscale_driver")
+
+class SettingsFacade(private val context: Context) {
+
+    /** Sparad BLE-tuning-profil ("Conservative"/"Balanced"/"Aggressive"), null = handlerns default. */
+    val savedBluetoothTuneProfile: Flow<String?> =
+        context.driverDataStore.data.map { it[stringPreferencesKey("tuning_profile")] }
+
+    /** openScales utvecklarläge (dumpar GATT-trädet i loggen istället för att mäta). */
+    val developerModeEnabled: Flow<Boolean> =
+        context.driverDataStore.data.map { it[stringPreferencesKey("developer_mode")] == "true" }
+
+    fun observeSetting(key: String, default: Int): Flow<Int> =
+        context.driverDataStore.data.map { it[intPreferencesKey(key)] ?: default }
+
+    fun observeSetting(key: String, default: String): Flow<String> =
+        context.driverDataStore.data.map { it[stringPreferencesKey(key)] ?: default }
+
+    suspend fun saveSetting(key: String, value: Int) {
+        context.driverDataStore.edit { it[intPreferencesKey(key)] = value }
+    }
+
+    suspend fun saveSetting(key: String, value: String) {
+        context.driverDataStore.edit { it[stringPreferencesKey(key)] = value }
+    }
+}
+
+class UserFacade {
+
+    private val selectedUser = MutableStateFlow<User?>(null)
+
+    /** Appen uppdaterar den aktuella användaren (längd/ålder/kön) härifrån. */
+    fun setSelectedUser(user: User?) {
+        selectedUser.value = user
+    }
+
+    fun observeSelectedUser(): StateFlow<User?> = selectedUser
+
+    fun observeAllUsers(): Flow<List<User>> = selectedUser.map { listOfNotNull(it) }
+
+    fun getAllGoalsForUser(userId: Int): Flow<List<Goal>> = flowOf(emptyList())
+}
+
+class MeasurementFacade {
+
+    /** Senaste mätningar per användare — används av vissa drivrutiner för användar-igenkänning. */
+    fun getMeasurementsForUser(userId: Int): Flow<List<MeasurementWithValues>> = flowOf(emptyList())
+
+    fun getAllMeasurementTypes(): Flow<List<MeasurementType>> = flowOf(
+        listOf(MeasurementType(MeasurementTypeKey.WEIGHT.id, MeasurementTypeKey.WEIGHT, UnitType.KG))
+    )
+}

app/src/main/java/com/health/openscale/core/model/MeasurementWithValues.kt

@@ -0,0 +1,28 @@
+/*
+ * FitnessDroid-shim för openScales MeasurementWithValues (upstream är en
+ * Room-relation). Bara det som bluetooth-adaptrarnas mapMeasurement() läser.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ */
+package com.health.openscale.core.model
+
+import com.health.openscale.core.data.MeasurementType
+import com.health.openscale.core.data.MeasurementValue
+
+data class Measurement(
+    val userId: Int,
+    val timestamp: Long,
+)
+
+data class ValueWithType(
+    val type: MeasurementType,
+    val value: MeasurementValue,
+)
+
+data class MeasurementWithValues(
+    val measurement: Measurement,
+    val values: List<ValueWithType>,
+)

app/src/main/java/com/health/openscale/core/service/BleScanner.kt

@@ -0,0 +1,357 @@
+/*
+ * openScale
+ * Copyright (C) 2025 olie.xdev <olie.xdeveloper@googlemail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.health.openscale.core.service
+
+import android.annotation.SuppressLint
+import android.bluetooth.BluetoothManager
+import android.bluetooth.le.ScanResult
+import android.content.Context
+import android.os.Handler
+import android.os.Looper
+import android.util.SparseArray
+import com.health.openscale.core.bluetooth.ScaleFactory
+import com.health.openscale.core.utils.LogManager
+import com.welie.blessed.BluetoothCentralManager
+import com.welie.blessed.BluetoothCentralManagerCallback
+import com.welie.blessed.BluetoothPeripheral
+import com.welie.blessed.ScanFailure
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import java.util.UUID
+import androidx.core.util.isNotEmpty
+import kotlin.time.Duration.Companion.milliseconds
+
+/**
+ * Data class to hold information about a scanned Bluetooth LE device.
+ *
+ * @property name The advertised name of the device. Can be null.
+ * @property address The MAC address of the device.
+ * @property rssi The received signal strength indicator (RSSI) in dBm.
+ * @property serviceUuids A list of service UUIDs advertised by the device.
+ * @property manufacturerData Manufacturer-specific data advertised by the device.
+ * @property serviceData Service-data payloads advertised by the device.
+ * @property isSupported Flag indicating whether openScale has a handler for this device.
+ * @property determinedHandlerDisplayName The display name of the handler determined for this device, if any.
+ */
+data class ScannedDeviceInfo(
+    var name: String,
+    val address: String,
+    val rssi: Int,
+    val serviceUuids: List<UUID>,
+    val manufacturerData: SparseArray<ByteArray>?,
+    val serviceData: Map<UUID, ByteArray> = emptyMap(),
+    var isSupported: Boolean = false,
+    var determinedHandlerDisplayName: String? = null
+)
+
+/**
+ * Manages Bluetooth LE device scanning operations using the Blessed library.
+ *
+ * This class handles starting, stopping, and processing scan results. It exposes
+ * [StateFlow]s for discovered devices, scanning status, and scan errors, allowing
+ * UI components or ViewModels to observe scanning activity.
+ *
+ * @param context The application context.
+ * @param externalScope A [CoroutineScope] (typically from a ViewModel) for launching tasks like scan timeouts.
+ * @param scaleFactory An instance of [ScaleFactory] used to determine device support and handler information.
+ */
+class BluetoothScannerManager(
+    private val context: Context,
+    private val externalScope: CoroutineScope,
+    private val scaleFactory: ScaleFactory
+) {
+    private companion object {
+        const val TAG = "BluetoothScannerMgr"
+    }
+
+    // Ensures Blessed library callbacks are executed on the main thread.
+    private val blessedBluetoothHandler = Handler(Looper.getMainLooper())
+    private val centralManager: BluetoothCentralManager by lazy {
+        BluetoothCentralManager(context, centralManagerCallback, blessedBluetoothHandler)
+    }
+
+    private val _scannedDevices = MutableStateFlow<List<ScannedDeviceInfo>>(emptyList())
+    /**
+     * Emits the current list of discovered and processed [ScannedDeviceInfo] objects.
+     * The list is sorted by support status (supported first), then by RSSI (strongest signal first),
+     * and finally by device name.
+     */
+    val scannedDevices: StateFlow<List<ScannedDeviceInfo>> = _scannedDevices.asStateFlow()
+
+    private val _isScanning = MutableStateFlow(false)
+    /**
+     * Emits `true` if a Bluetooth LE scan is currently active, `false` otherwise.
+     */
+    val isScanning: StateFlow<Boolean> = _isScanning.asStateFlow()
+
+    private val _scanError = MutableStateFlow<String?>(null)
+    /**
+     * Emits error messages related to the scanning process.
+     * Emits `null` if there is no current error or an error has been cleared.
+     */
+    val scanError: StateFlow<String?> = _scanError.asStateFlow()
+
+    private var scanTimeoutJob: Job? = null
+    // Stores unique devices found during a scan, keyed by MAC address, for efficient updates.
+    private val deviceMap = mutableMapOf<String, ScannedDeviceInfo>()
+
+    /**
+     * Starts a Bluetooth LE scan for a specified duration.
+     *
+     * Prerequisites (e.g., Bluetooth enabled, permissions granted) are checked.
+     * If a scan is already in progress, this method returns without action.
+     *
+     * @param scanDurationMs The duration in milliseconds for the scan.
+     *                       The scan automatically stops after this period if not manually stopped earlier.
+     */
+    @SuppressLint("MissingPermission") // Permissions are expected to be checked by the calling ViewModel.
+    fun startScan(scanDurationMs: Long) {
+        if (!validateScanPrerequisites()) {
+            return
+        }
+
+        if (_isScanning.value || centralManager.isScanning) {
+            LogManager.d(TAG, "Scan is already in progress.")
+            return
+        }
+        LogManager.i(TAG, "Starting device scan for $scanDurationMs ms.")
+
+        deviceMap.clear()
+        _scannedDevices.value = emptyList()
+        _scanError.value = null // Clear previous errors.
+        _isScanning.value = true
+
+        try {
+            centralManager.scanForPeripherals()
+        } catch (e: Exception) {
+            LogManager.e(TAG, "Exception while starting scan: ${e.message}", e)
+            _scanError.value = "Error starting scan: ${e.localizedMessage ?: "Unknown error"}"
+            _isScanning.value = false
+            return
+        }
+
+        scanTimeoutJob?.cancel()
+        scanTimeoutJob = externalScope.launch {
+            delay(scanDurationMs.milliseconds)
+            if (_isScanning.value) {
+                LogManager.i(TAG, "Scan timeout reached after $scanDurationMs ms.")
+                stopScanInternal(isTimeout = true)
+            }
+        }
+    }
+
+    /**
+     * Stops the currently active Bluetooth LE scan.
+     */
+    fun stopScan() {
+        stopScanInternal(isTimeout = false)
+    }
+
+    /**
+     * Internal implementation for stopping the scan.
+     * @param isTimeout Indicates if the stop was triggered by a timeout.
+     */
+    private fun stopScanInternal(isTimeout: Boolean) {
+        if (!_isScanning.value && !centralManager.isScanning) {
+            return // Scan not active.
+        }
+        LogManager.i(TAG, "Stopping device scan. Triggered by timeout: $isTimeout")
+        scanTimeoutJob?.cancel()
+        scanTimeoutJob = null
+
+        try {
+            if (centralManager.isScanning) {
+                centralManager.stopScan()
+            }
+        } catch (e: Exception) {
+            LogManager.e(TAG, "Exception while stopping scan: ${e.message}", e)
+            // Optionally, an error could be set here, but it's often not critical for a stop action.
+        }
+        _isScanning.value = false
+
+        if (isTimeout && deviceMap.isEmpty()) {
+            _scanError.value = "No devices found."
+        }
+        LogManager.d(TAG, "Scan stopped. Found devices: ${deviceMap.size}")
+    }
+
+    /**
+     * Validates if conditions are met to start a scan (e.g., Bluetooth enabled).
+     * Note: Permission checks are the responsibility of the calling ViewModel.
+     *
+     * @return `true` if prerequisites are met, `false` otherwise.
+     *         If `false`, `_scanError` is updated with the reason.
+     */
+    private fun validateScanPrerequisites(): Boolean {
+        val bluetoothManager = context.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager?
+        if (bluetoothManager?.adapter?.isEnabled != true) {
+            LogManager.w(TAG, "Scan prerequisites not met: Bluetooth is disabled.")
+            _scanError.value = "Bluetooth is disabled. Please enable it to scan."
+            return false
+        }
+
+        if (_isScanning.value) {
+            LogManager.d(TAG, "Scan is already in progress (checked in validate).")
+            return false
+        }
+        _scanError.value = null // Clear errors if prerequisites are met.
+        return true
+    }
+
+    /**
+     * Clears any active scan error message from `scanError` StateFlow.
+     */
+    fun clearScanError() {
+        if (_scanError.value != null) {
+            _scanError.value = null
+        }
+    }
+
+    /**
+     * Releases resources used by the scanner, including the Blessed [BluetoothCentralManager].
+     * Call this when the scanner is no longer needed (e.g., in ViewModel's `onCleared`).
+     */
+    fun close() {
+        LogManager.i(TAG, "Closing BluetoothScannerManager.")
+        stopScanInternal(isTimeout = false) // Ensure scan is stopped.
+        try {
+            // Crucial to close BluetoothCentralManager to release system resources
+            // and unregister internal broadcast receivers used by the Blessed library.
+            centralManager.close()
+            LogManager.d(TAG, "Blessed BluetoothCentralManager closed successfully.")
+        } catch (e: Exception) {
+            LogManager.e(TAG, "Error closing Blessed BluetoothCentralManager: ${e.message}", e)
+        }
+    }
+
+    private val centralManagerCallback = object : BluetoothCentralManagerCallback() {
+        @SuppressLint("MissingPermission") // Permissions are handled before scan initiation.
+        override fun onDiscovered(peripheral: BluetoothPeripheral, scanResult: ScanResult) {
+            val deviceName = peripheral.name
+            val deviceAddress = peripheral.address
+            val rssi = scanResult.rssi
+            val serviceUuids: List<UUID> = scanResult.scanRecord?.serviceUuids?.mapNotNull { it?.uuid } ?: emptyList()
+            val manufacturerData: SparseArray<ByteArray>? = scanResult.scanRecord?.manufacturerSpecificData
+            val serviceData: Map<UUID, ByteArray> = scanResult.scanRecord?.serviceData
+                ?.mapKeys { it.key.uuid }
+                ?.mapValues { it.value.copyOf() }
+                ?: emptyMap()
+
+            val newDevice = ScannedDeviceInfo(
+                name = deviceName,
+                address = deviceAddress,
+                rssi = rssi,
+                serviceUuids = serviceUuids,
+                manufacturerData = manufacturerData,
+                serviceData = serviceData,
+                isSupported = false, // will be determined in the next getSupportingHandlerInfo
+                determinedHandlerDisplayName = null // // will be determined in the next getSupportingHandlerInfo
+            )
+
+            val (isSupported, handlerName) = scaleFactory.getSupportingHandlerInfo(newDevice)
+
+            newDevice.isSupported = isSupported
+            newDevice.determinedHandlerDisplayName = handlerName
+
+            val existingDevice = deviceMap[newDevice.address]
+            var listShouldBeUpdated = false
+
+            if (existingDevice != null) {
+                // Update criteria: if RSSI changed, or if key device info (name, support, handler, services, manufacturer data) has improved or changed.
+                val nameChangedToKnown = newDevice.name.isNotEmpty() && existingDevice.name.isEmpty()
+                val supportStatusImproved = !existingDevice.isSupported && newDevice.isSupported
+                val handlerChanged = newDevice.determinedHandlerDisplayName != existingDevice.determinedHandlerDisplayName
+                val serviceUuidsUpdated = newDevice.serviceUuids.isNotEmpty() && newDevice.serviceUuids != existingDevice.serviceUuids
+                val manuDataUpdated = newDevice.manufacturerData != null && !newDevice.manufacturerData.contentEquals(existingDevice.manufacturerData)
+                val serviceDataUpdated = newDevice.serviceData.isNotEmpty() && !newDevice.serviceData.contentEquals(existingDevice.serviceData)
+
+                if (newDevice.rssi != existingDevice.rssi || nameChangedToKnown || supportStatusImproved || handlerChanged || serviceUuidsUpdated || manuDataUpdated || serviceDataUpdated) {
+                    deviceMap[newDevice.address] = existingDevice.copy(
+                        name = newDevice.name.ifEmpty { existingDevice.name }, // Prefer new name if available.
+                        rssi = newDevice.rssi,
+                        isSupported = existingDevice.isSupported || newDevice.isSupported, // Retain 'supported' status if ever true.
+                        determinedHandlerDisplayName = newDevice.determinedHandlerDisplayName ?: existingDevice.determinedHandlerDisplayName,
+                        serviceUuids = if (newDevice.serviceUuids.isNotEmpty()) newDevice.serviceUuids else existingDevice.serviceUuids,
+                        manufacturerData = newDevice.manufacturerData ?: existingDevice.manufacturerData,
+                        serviceData = newDevice.serviceData.ifEmpty { existingDevice.serviceData }
+                    )
+                    listShouldBeUpdated = true
+                }
+            } else {
+                // Add new device if it's supported, or has a meaningful name, or provides service/manufacturer data.
+                // This avoids populating the list with devices that have no identifying information and are not supported.
+                if (newDevice.isSupported ||
+                    newDevice.name.isNotEmpty() ||
+                    newDevice.serviceUuids.isNotEmpty() ||
+                    (newDevice.manufacturerData != null && newDevice.manufacturerData.isNotEmpty()) ||
+                    newDevice.serviceData.isNotEmpty()
+                ) {
+                    deviceMap[newDevice.address] = newDevice
+                    listShouldBeUpdated = true
+                }
+            }
+
+            if (listShouldBeUpdated) {
+                // Filter ensures only devices that are supported or have a meaningful name (not generic "Unknown Device") are emitted.
+                // Sorting provides a consistent and user-friendly order.
+                _scannedDevices.value = deviceMap.values
+                    .filter { it.isSupported || (it.name.isNotEmpty() && it.name != "Unbekanntes Gerät" && it.name != "Unknown Device") }
+                    .sortedWith(compareByDescending<ScannedDeviceInfo> { it.isSupported }
+                        .thenByDescending { it.rssi }
+                        .thenBy { it.name.ifEmpty { "zzzz" }.lowercase() }) // "zzzz" ensures unnamed devices sort last.
+                    .toList()
+            }
+        }
+
+        override fun onScanFailed(scanFailure: ScanFailure) {
+            LogManager.e(TAG, "Bluetooth scan failed: $scanFailure")
+            externalScope.launch {
+                _scanError.value = "Bluetooth Scan Failed: $scanFailure"
+                _isScanning.value = false
+                scanTimeoutJob?.cancel() // Stop scan timeout if scan fails.
+            }
+        }
+    }
+
+}
+
+private fun SparseArray<ByteArray>?.contentEquals(other: SparseArray<ByteArray>?): Boolean {
+    if (this == null || other == null) return this == other
+    if (size() != other.size()) return false
+    for (i in 0 until size()) {
+        val key = keyAt(i)
+        val otherIndex = other.indexOfKey(key)
+        if (otherIndex < 0) return false
+        if (!valueAt(i).contentEquals(other.valueAt(otherIndex))) return false
+    }
+    return true
+}
+
+private fun Map<UUID, ByteArray>.contentEquals(other: Map<UUID, ByteArray>): Boolean {
+    if (size != other.size) return false
+    for ((key, value) in this) {
+        val otherValue = other[key] ?: return false
+        if (!value.contentEquals(otherValue)) return false
+    }
+    return true
+}

app/src/main/java/com/health/openscale/core/utils/ConverterUtils.kt

@@ -0,0 +1,266 @@
+/*
+ * openScale
+ * Copyright (C) 2025 olie.xdev <olie.xdeveloper@googlemail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.health.openscale.core.utils
+
+import com.health.openscale.core.data.MeasureUnit
+import com.health.openscale.core.data.UnitType
+import com.health.openscale.core.data.WeightUnit
+import kotlin.math.floor
+import kotlin.math.roundToInt
+
+
+object ConverterUtils {
+    private const val KG_LB: Float = 2.20462f
+    private const val KG_ST: Float = 0.157473f
+    private const val CM_IN: Float = 0.393701f
+
+    private const val LB_PER_ST_DOUBLE: Double = 14.0
+
+    @JvmStatic
+    fun toKilogram(value: Float, unit: WeightUnit): Float {
+        when (unit) {
+            WeightUnit.LB -> return value / KG_LB
+            WeightUnit.ST -> return value / KG_ST
+            WeightUnit.KG -> return value
+        }
+    }
+
+    @JvmStatic
+    fun fromKilogram(kg: Float, unit: WeightUnit): Float {
+        when (unit) {
+            WeightUnit.LB -> return kg * KG_LB
+            WeightUnit.ST -> return kg * KG_ST
+            WeightUnit.KG -> return kg
+        }
+    }
+
+    @JvmStatic
+    fun toCentimeter(value: Float, unit: MeasureUnit): Float {
+        when (unit) {
+            MeasureUnit.INCH -> return value / CM_IN
+            MeasureUnit.CM -> return value
+        }
+    }
+
+    @JvmStatic
+    fun fromCentimeter(cm: Float, unit: MeasureUnit): Float {
+        when (unit) {
+            MeasureUnit.INCH -> return cm * CM_IN
+            MeasureUnit.CM -> return cm
+        }
+    }
+
+    @JvmStatic
+    fun decimalStToStLb(stDec: Double): Pair<Int, Int> {
+        val totalLb = stDec * LB_PER_ST_DOUBLE
+        var st = floor(totalLb / LB_PER_ST_DOUBLE).toInt()
+        var lb = (totalLb - st * LB_PER_ST_DOUBLE).roundToInt()
+        if (lb == 14) { st += 1; lb = 0 } // normalize carry
+        return st to lb
+    }
+
+    @JvmStatic
+    fun stLbToStDecimal(st: Int, lb: Int): Double =
+        st + (lb / LB_PER_ST_DOUBLE)
+
+    @JvmStatic
+    fun fromSignedInt16Le(data: ByteArray, offset: Int): Int {
+        var value = data[offset + 1].toInt() shl 8
+        value += data[offset].toInt() and 0xFF
+        return value
+    }
+    @JvmStatic
+    fun fromSignedInt16Be(data: ByteArray, offset: Int): Int {
+        var value = data[offset].toInt() shl 8
+        value += data[offset + 1].toInt() and 0xFF
+        return value
+    }
+    @JvmStatic
+    fun fromUnsignedInt16Le(data: ByteArray, offset: Int): Int {
+        return fromSignedInt16Le(data, offset) and 0xFFFF
+    }
+    @JvmStatic
+    fun fromUnsignedInt16Be(data: ByteArray, offset: Int): Int {
+        return fromSignedInt16Be(data, offset) and 0xFFFF
+    }
+    @JvmStatic
+    fun toInt16Le(data: ByteArray, offset: Int, value: Int) {
+        data[offset + 0] = (value and 0xFF).toByte()
+        data[offset + 1] = ((value shr 8) and 0xFF).toByte()
+    }
+    @JvmStatic
+    fun toInt16Be(data: ByteArray, offset: Int, value: Int) {
+        data[offset + 0] = ((value shr 8) and 0xFF).toByte()
+        data[offset + 1] = (value and 0xFF).toByte()
+    }
+    @JvmStatic
+    fun toInt16Le(value: Int): ByteArray {
+        val data = ByteArray(2)
+        toInt16Le(data, 0, value)
+        return data
+    }
+    @JvmStatic
+    fun toInt16Be(value: Int): ByteArray {
+        val data = ByteArray(2)
+        toInt16Be(data, 0, value)
+        return data
+    }
+    @JvmStatic
+    fun fromSignedInt24Le(data: ByteArray, offset: Int): Int {
+        var value = data[offset + 2].toInt() shl 16
+        value += (data[offset + 1].toInt() and 0xFF) shl 8
+        value += data[offset].toInt() and 0xFF
+        return value
+    }
+    @JvmStatic
+    fun fromSignedInt24Be(data: ByteArray, offset: Int): Int {
+        var value = data[offset].toInt() shl 16
+        value += (data[offset + 1].toInt() and 0xFF) shl 8
+        value += data[offset + 2].toInt() and 0xFF
+        return value
+    }
+    @JvmStatic
+    fun fromUnsignedInt24Le(data: ByteArray, offset: Int): Int {
+        return fromSignedInt24Le(data, offset) and 0xFFFFFF
+    }
+    @JvmStatic
+    fun fromUnsignedInt24Be(data: ByteArray, offset: Int): Int {
+        return fromSignedInt24Be(data, offset) and 0xFFFFFF
+    }
+    @JvmStatic
+    fun fromSignedInt32Le(data: ByteArray, offset: Int): Int {
+        var value = data[offset + 3].toInt() shl 24
+        value += (data[offset + 2].toInt() and 0xFF) shl 16
+        value += (data[offset + 1].toInt() and 0xFF) shl 8
+        value += data[offset].toInt() and 0xFF
+        return value
+    }
+    @JvmStatic
+    fun fromSignedInt32Be(data: ByteArray, offset: Int): Int {
+        var value = data[offset].toInt() shl 24
+        value += (data[offset + 1].toInt() and 0xFF) shl 16
+        value += (data[offset + 2].toInt() and 0xFF) shl 8
+        value += data[offset + 3].toInt() and 0xFF
+        return value
+    }
+    @JvmStatic
+    fun fromUnsignedInt32Le(data: ByteArray, offset: Int): Long {
+        return fromSignedInt32Le(data, offset).toLong() and 0xFFFFFFFFL
+    }
+    @JvmStatic
+    fun fromUnsignedInt32Be(data: ByteArray, offset: Int): Long {
+        return fromSignedInt32Be(data, offset).toLong() and 0xFFFFFFFFL
+    }
+    @JvmStatic
+    fun toInt32Le(data: ByteArray, offset: Int, value: Long) {
+        data[offset + 3] = ((value shr 24) and 0xFFL).toByte()
+        data[offset + 2] = ((value shr 16) and 0xFFL).toByte()
+        data[offset + 1] = ((value shr 8) and 0xFFL).toByte()
+        data[offset + 0] = (value and 0xFFL).toByte()
+    }
+    @JvmStatic
+    fun toInt32Be(data: ByteArray, offset: Int, value: Long) {
+        data[offset + 0] = ((value shr 24) and 0xFFL).toByte()
+        data[offset + 1] = ((value shr 16) and 0xFFL).toByte()
+        data[offset + 2] = ((value shr 8) and 0xFFL).toByte()
+        data[offset + 3] = (value and 0xFFL).toByte()
+    }
+    @JvmStatic
+    fun toInt32Le(value: Long): ByteArray {
+        val data = ByteArray(4)
+        toInt32Le(data, 0, value)
+        return data
+    }
+    @JvmStatic
+    fun toInt32Be(value: Long): ByteArray {
+        val data = ByteArray(4)
+        toInt32Be(data, 0, value)
+        return data
+    }
+
+    /**
+     * Converts a Float value from one UnitType to another, if a conversion is defined.
+     * Returns the original value if no conversion is applicable or units are the same.
+     *
+     * @param value The float value to convert.
+     * @param fromUnit The original UnitType of the value.
+     * @param toUnit The target UnitType for the value.
+     * @return The converted float value, or the original value if no conversion is done.
+     */
+    @JvmStatic
+    fun convertFloatValueUnit(value: Float, fromUnit: UnitType, toUnit: UnitType): Float {
+        if (fromUnit == toUnit) return value
+
+        // KG -> Andere Gewichtseinheiten
+        if (fromUnit == UnitType.KG) {
+            return when (toUnit) {
+                UnitType.LB -> fromKilogram(value, WeightUnit.LB)
+                UnitType.ST -> fromKilogram(value, WeightUnit.ST)
+                else -> value // Keine Umrechnung zu anderen Typen von KG aus
+            }
+        }
+        // LB -> Andere Gewichtseinheiten (erst zu KG, dann zum Ziel)
+        if (fromUnit == UnitType.LB) {
+            val kgValue = toKilogram(value, WeightUnit.LB)
+            return when (toUnit) {
+                UnitType.KG -> kgValue
+                UnitType.ST -> fromKilogram(kgValue, WeightUnit.ST)
+                else -> value
+            }
+        }
+        // ST -> Andere Gewichtseinheiten (erst zu KG, dann zum Ziel)
+        if (fromUnit == UnitType.ST) {
+            val kgValue = toKilogram(value, WeightUnit.ST)
+            return when (toUnit) {
+                UnitType.KG -> kgValue
+                UnitType.LB -> fromKilogram(kgValue, WeightUnit.LB)
+                else -> value
+            }
+        }
+
+        // CM -> Andere Längeneinheiten
+        if (fromUnit == UnitType.CM) {
+            return when (toUnit) {
+                UnitType.INCH -> fromCentimeter(value, MeasureUnit.INCH)
+                else -> value
+            }
+        }
+
+        if (fromUnit == UnitType.INCH) {
+            val cmValue = toCentimeter(value, MeasureUnit.INCH)
+            return when (toUnit) {
+                UnitType.CM -> cmValue
+                else -> value
+            }
+        }
+
+        return value
+    }
+
+    /**
+     * Removes all non-digit characters from [input] and truncates the result to [maxLen] characters.
+     *
+     * @param input  The raw string to sanitize.
+     * @param maxLen The maximum number of digit characters to retain.
+     * @return       A string containing only digit characters, at most [maxLen] characters long.
+     */
+    @JvmStatic
+    fun sanitizeDigits(input: String, maxLen: Int): String =
+        input.filter { it.isDigit() }.take(maxLen)
+
+}

app/src/main/java/com/health/openscale/core/utils/LogManager.kt

@@ -0,0 +1,19 @@
+/*
+ * FitnessDroid-shim för openScales LogManager.
+ * Upstream har filloggning m.m. — här räcker Androids vanliga logcat.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ */
+package com.health.openscale.core.utils
+
+import android.util.Log
+
+object LogManager {
+    fun d(tag: String, msg: String) { Log.d(tag, msg) }
+    fun i(tag: String, msg: String) { Log.i(tag, msg) }
+    fun w(tag: String, msg: String, t: Throwable? = null) { Log.w(tag, msg, t) }
+    fun e(tag: String, msg: String, t: Throwable? = null) { Log.e(tag, msg, t) }
+}

app/src/main/java/eu/brassepc/fitnessdroid/FitnessDroidApplication.kt

@@ -3,16 +3,38 @@ package eu.brassepc.fitnessdroid
 import android.app.Application
 import android.content.Context
 import eu.brassepc.fitnessdroid.data.AuthRepository
+import eu.brassepc.fitnessdroid.data.CredentialStore
 import eu.brassepc.fitnessdroid.data.GraphQlClient
 import eu.brassepc.fitnessdroid.data.GymApi
+import eu.brassepc.fitnessdroid.data.GymRepository
+import eu.brassepc.fitnessdroid.data.RestTimerController
+import eu.brassepc.fitnessdroid.data.ScaleManager
+import eu.brassepc.fitnessdroid.data.StepsSync
+import eu.brassepc.fitnessdroid.data.SettingsStore
+import eu.brassepc.fitnessdroid.data.SyncEngine
 import eu.brassepc.fitnessdroid.data.TokenStore
+import eu.brassepc.fitnessdroid.data.UpdateChecker
+import eu.brassepc.fitnessdroid.data.local.AppDatabase
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
 
 /** Enkel manuell DI-container — appen är för liten för Hilt. */
 class AppContainer(context: Context) {
+    val appScope = CoroutineScope(SupervisorJob() + Dispatchers.IO)
     val tokenStore = TokenStore(context)
+    val settingsStore = SettingsStore(context)
+    val credentialStore = CredentialStore(context)
     val graphQlClient = GraphQlClient { tokenStore.apiUrl() }
-    val authRepository = AuthRepository(tokenStore, graphQlClient)
+    val authRepository = AuthRepository(tokenStore, graphQlClient, credentialStore, settingsStore)
     val gymApi = GymApi(graphQlClient, authRepository)
+    val database = AppDatabase.build(context)
+    val syncEngine = SyncEngine(database, graphQlClient, authRepository, appScope)
+    val gymRepository = GymRepository(database, graphQlClient, authRepository, syncEngine, tokenStore, appScope)
+    val restTimer = RestTimerController(context, settingsStore, appScope)
+    val updateChecker = UpdateChecker(context)
+    val scaleManager = ScaleManager(context, settingsStore, appScope)
+    val stepsSync = StepsSync(context, gymApi)
 }
 
 class FitnessDroidApplication : Application() {

app/src/main/java/eu/brassepc/fitnessdroid/data/ActivityKcal.kt

@@ -0,0 +1,179 @@
+package eu.brassepc.fitnessdroid.data
+
+import kotlin.math.max
+
+/**
+ * Kcal-uppskattning för aktiviteter — Kotlin-port av serverns
+ * ActivityCalorieService så att live-siffran under spårning stämmer med det
+ * som sparas. Netto-kcal (MET−1) eftersom BMR räknas separat i dagsmätaren.
+ */
+object ActivityKcal {
+
+    fun estimate(
+        met: Double,
+        category: String,
+        isDistanceBased: Boolean,
+        weightKg: Double?,
+        durationSeconds: Int,
+        distanceMeters: Double?,
+        elevationGainMeters: Double?,
+        rpe: Double?,
+    ): Double? {
+        if (weightKg == null || weightKg <= 0 || durationSeconds <= 0) return null
+
+        val hours = durationSeconds / 3600.0
+        var effectiveMet = met
+        val speedKmh = if (distanceMeters != null && distanceMeters > 0) {
+            (distanceMeters / 1000.0) / hours
+        } else null
+
+        if (isDistanceBased && speedKmh != null) {
+            effectiveMet = when (category) {
+                "WALK" -> walkingMet(speedKmh, hiking = false)
+                "HIKE" -> walkingMet(speedKmh, hiking = true)
+                "RUN" -> runningMet(speedKmh)
+                "CYCLE" -> cyclingMet(speedKmh)
+                else -> effectiveMet
+            }
+        } else if (!isDistanceBased && rpe != null) {
+            effectiveMet *= 0.5 + rpe.coerceIn(0.0, 10.0) / 10.0
+        }
+
+        var kcal = (max(effectiveMet, 1.0) - 1.0) * weightKg * hours
+        if (elevationGainMeters != null && elevationGainMeters > 0) {
+            kcal += 0.0067 * weightKg * elevationGainMeters
+        }
+        return kcal
+    }
+
+    private fun walkingMet(kmh: Double, hiking: Boolean): Double {
+        val met = when {
+            kmh < 3.2 -> 2.8
+            kmh < 4.0 -> 3.0
+            kmh < 4.8 -> 3.5
+            kmh < 5.6 -> 4.3
+            kmh < 6.4 -> 5.0
+            kmh < 7.2 -> 7.0
+            else -> 8.3
+        }
+        return if (hiking) max(met + 1.5, 5.3) else met
+    }
+
+    private fun runningMet(kmh: Double): Double = (kmh * 1.02).coerceIn(6.0, 19.0)
+
+    private fun cyclingMet(kmh: Double): Double = when {
+        kmh < 15.0 -> 4.0
+        kmh < 19.0 -> 5.8
+        kmh < 22.5 -> 8.0
+        kmh < 25.7 -> 10.0
+        kmh < 30.0 -> 12.0
+        else -> 15.8
+    }
+
+    /**
+     * Gissa aktivitetstyp (nyckel) för ett spårat distanspass — används för
+     * "Ser ut som X"-förslaget i sammanfattningen.
+     */
+    fun guessTypeKey(avgKmh: Double, elevationGainPerKm: Double): String = when {
+        avgKmh < 2.0 -> "walking_casual"
+        avgKmh < 6.5 -> if (elevationGainPerKm > 25) "hiking_forest" else "walking_city"
+        avgKmh < 9.0 -> "jogging"
+        avgKmh < 14.0 -> "running"
+        else -> "cycling"
+    }
+}
+
+/** Google encoded polyline (precision 1e5) — samma format som webben avkodar. */
+fun encodePolyline(points: List<Pair<Double, Double>>): String {
+    val sb = StringBuilder()
+    var lastLat = 0L
+    var lastLon = 0L
+    for ((lat, lon) in points) {
+        val iLat = Math.round(lat * 1e5)
+        val iLon = Math.round(lon * 1e5)
+        encodeDiff(iLat - lastLat, sb)
+        encodeDiff(iLon - lastLon, sb)
+        lastLat = iLat
+        lastLon = iLon
+    }
+    return sb.toString()
+}
+
+private fun encodeDiff(diff: Long, sb: StringBuilder) {
+    var v = diff shl 1
+    if (diff < 0) v = v.inv()
+    while (v >= 0x20) {
+        sb.append((((v and 0x1f) or 0x20) + 63).toInt().toChar())
+        v = v shr 5
+    }
+    sb.append((v + 63).toInt().toChar())
+}
+
+
+/** Avkoda Google encoded polyline (precision 1e5) → [(lat, lon)]. */
+fun decodePolyline(encoded: String): List<Pair<Double, Double>> {
+    val points = mutableListOf<Pair<Double, Double>>()
+    var index = 0
+    var lat = 0L
+    var lon = 0L
+    while (index < encoded.length) {
+        for (which in 0..1) {
+            var result = 0L
+            var shift = 0
+            while (true) {
+                val b = (encoded[index].code - 63).toLong()
+                index++
+                result = result or ((b and 0x1f) shl shift)
+                shift += 5
+                if (b < 0x20) break
+            }
+            val delta = if ((result and 1L) != 0L) (result shr 1).inv() else (result shr 1)
+            if (which == 0) lat += delta else lon += delta
+        }
+        points.add(lat / 1e5 to lon / 1e5)
+    }
+    return points
+}
+
+/**
+ * Douglas–Peucker-nedbantning av en rutt: tar bort punkter som ligger inom
+ * [epsilonMeters] från linjen mellan sina grannar. Kraftigt färre punkter i
+ * databasen utan att ruttens form ändras nämnvärt.
+ */
+fun simplifyRoute(points: List<Pair<Double, Double>>, epsilonMeters: Double = 4.0): List<Pair<Double, Double>> {
+    if (points.size < 3) return points
+    val lat0 = Math.toRadians(points[0].first)
+    // approximativ projektion till meter (räcker gott för korta rutter)
+    fun xy(p: Pair<Double, Double>) = (p.second * 111_320 * Math.cos(lat0)) to (p.first * 110_540)
+    val proj = points.map { xy(it) }
+    val keep = BooleanArray(points.size)
+    keep[0] = true
+    keep[points.size - 1] = true
+
+    val stack = ArrayDeque<Pair<Int, Int>>()
+    stack.addLast(0 to points.size - 1)
+    while (stack.isNotEmpty()) {
+        val (a, b) = stack.removeLast()
+        val (ax, ay) = proj[a]
+        val (bx, by) = proj[b]
+        val dx = bx - ax
+        val dy = by - ay
+        val norm = Math.hypot(dx, dy).coerceAtLeast(1e-9)
+        var worst = -1
+        var worstDist = 0.0
+        for (i in a + 1 until b) {
+            val (px, py) = proj[i]
+            val d = Math.abs(dy * (px - ax) - dx * (py - ay)) / norm
+            if (d > worstDist) {
+                worstDist = d
+                worst = i
+            }
+        }
+        if (worstDist > epsilonMeters && worst > 0) {
+            keep[worst] = true
+            stack.addLast(a to worst)
+            stack.addLast(worst to b)
+        }
+    }
+    return points.filterIndexed { i, _ -> keep[i] }
+}

app/src/main/java/eu/brassepc/fitnessdroid/data/AuthRepository.kt

@@ -2,6 +2,7 @@ package eu.brassepc.fitnessdroid.data
 
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
 import kotlinx.serialization.json.booleanOrNull
@@ -26,6 +27,8 @@ sealed interface AuthState {
 class AuthRepository(
     private val store: TokenStore,
     private val client: GraphQlClient,
+    private val credentials: CredentialStore,
+    private val settings: SettingsStore,
 ) {
     private val _state = MutableStateFlow<AuthState>(AuthState.Restoring)
     val state: StateFlow<AuthState> = _state
@@ -59,14 +62,40 @@ class AuthRepository(
             refreshToken = refreshToken,
             expirationEpochMs = parseExpiration(expiration),
         )
+        // Spara uppgifterna krypterat för tyst återinloggning (inställbart).
+        if (settings.settings.first().autoRelogin) {
+            runCatching { credentials.save(username.trim(), password) }
+        }
         _state.value = AuthState.LoggedIn(userName)
     }
 
+    /**
+     * Servern har avvisat vår session (refresh-token död, session utgången).
+     * Sista utvägen innan riktig utloggning: logga in tyst igen med de
+     * sparade uppgifterna. Returnerar ny JWT eller null.
+     */
+    private suspend fun trySilentRelogin(): String? {
+        if (!settings.settings.first().autoRelogin) return null
+        val creds = credentials.load() ?: return null
+        return try {
+            login(creds.username, creds.password, store.apiUrl())
+            store.read().token
+        } catch (e: GraphQlException) {
+            // Fel lösenord/användare — uppgifterna är inte giltiga längre.
+            runCatching { credentials.clear() }
+            null
+        }
+        // IOException bubblar uppåt: nätfel ska ge retry, inte utloggning.
+    }
+
     /** Återställ sessionen vid appstart, som webbens restoreSession(). */
     suspend fun restoreSession() {
         val saved = store.read()
         if (saved.sessionId.isNullOrEmpty() || saved.refreshToken.isNullOrEmpty()) {
-            _state.value = AuthState.LoggedOut
+            // Inga tokens alls — men kanske sparade uppgifter (t.ex. efter
+            // att servern rensat sessioner). Prova tyst innan login-skärmen.
+            val relogged = runCatching { trySilentRelogin() }.getOrNull()
+            if (relogged == null) _state.value = AuthState.LoggedOut
             return
         }
         try {
@@ -78,18 +107,22 @@ class AuthRepository(
                 ?.get("isValid")?.jsonPrimitive?.booleanOrNull == true
             if (valid) {
                 _state.value = AuthState.LoggedIn(saved.username.orEmpty())
+            } else if (trySilentRelogin() != null) {
+                // login() har redan satt LoggedIn — utloggningen märktes aldrig.
             } else {
                 store.clearSession()
                 _state.value = AuthState.LoggedOut
             }
         } catch (e: Exception) {
             // Nätverksfel vid uppstart: släpp in användaren om JWT:n inte hunnit
-            // gå ut, annars visa inloggningen igen.
+            // gå ut. Har den gått ut: prova tyst återinloggning (kan också
+            // faila på nätet — då login-skärmen, synken tar det sen).
             val stillValid = (saved.expirationEpochMs ?: 0) > System.currentTimeMillis()
-            _state.value = if (stillValid) {
-                AuthState.LoggedIn(saved.username.orEmpty())
-            } else {
-                AuthState.LoggedOut
+            _state.value = when {
+                stillValid -> AuthState.LoggedIn(saved.username.orEmpty())
+                runCatching { trySilentRelogin() }.getOrNull() != null ->
+                    AuthState.LoggedIn(store.read().username.orEmpty())
+                else -> AuthState.LoggedOut
             }
         }
     }
@@ -110,6 +143,7 @@ class AuthRepository(
         val sessionId = saved.sessionId
         val refreshToken = saved.refreshToken
         if (sessionId == null || refreshToken == null) {
+            trySilentRelogin()?.let { return it }
             forceLogout()
             throw GraphQlException(listOf("Sessionen har gått ut, logga in igen"))
         }
@@ -127,12 +161,17 @@ class AuthRepository(
             val newRefresh = result?.get("newRefreshToken")?.jsonPrimitive?.contentOrNullSafe()
             val newExpiration = result?.get("accessTokenExpiration")?.jsonPrimitive?.contentOrNullSafe()
             if (!success || newToken == null || newRefresh == null) {
+                trySilentRelogin()?.let { return it }
                 forceLogout()
                 throw GraphQlException(listOf("Sessionen har gått ut, logga in igen"))
             }
             store.updateTokens(newToken, newRefresh, parseExpiration(newExpiration))
             newToken
         } catch (e: GraphQlException) {
+            // Servern avvisade refresh-tokenen. Försök logga in tyst igen med
+            // sparade uppgifter innan riktig utloggning. Nätfel (IOException)
+            // bubblar istället uppåt så synkmotorn kan försöka igen.
+            trySilentRelogin()?.let { return it }
             forceLogout()
             throw GraphQlException(listOf("Sessionen har gått ut, logga in igen"))
         }
@@ -145,6 +184,8 @@ class AuthRepository(
                 client.execute(LOGOUT, buildJsonObject { put("s", saved.sessionId) })
             }
         }
+        // Manuell utloggning = släng även de sparade uppgifterna.
+        runCatching { credentials.clear() }
         forceLogout()
     }
 

app/src/main/java/eu/brassepc/fitnessdroid/data/Bmr.kt

@@ -0,0 +1,20 @@
+package eu.brassepc.fitnessdroid.data
+
+import java.time.LocalDate
+
+/**
+ * Basalmetabolism (kcal/dygn) enligt Mifflin–St Jeor:
+ * 10·vikt + 6.25·längd − 5·ålder + 5 (man) / −161 (kvinna).
+ * null om något av underlagen saknas.
+ */
+fun bmrKcalPerDay(
+    weightKg: Double?,
+    heightCm: Double?,
+    birthYear: Int?,
+    isFemale: Boolean?,
+): Double? {
+    if (weightKg == null || heightCm == null || birthYear == null || isFemale == null) return null
+    val age = (LocalDate.now().year - birthYear).coerceIn(0, 120)
+    val k = if (isFemale) -161.0 else 5.0
+    return 10.0 * weightKg + 6.25 * heightCm - 5.0 * age + k
+}

app/src/main/java/eu/brassepc/fitnessdroid/data/CredentialStore.kt

@@ -0,0 +1,85 @@
+package eu.brassepc.fitnessdroid.data
+
+import android.content.Context
+import android.security.keystore.KeyGenParameterSpec
+import android.security.keystore.KeyProperties
+import android.util.Base64
+import androidx.datastore.preferences.core.edit
+import androidx.datastore.preferences.core.stringPreferencesKey
+import androidx.datastore.preferences.preferencesDataStore
+import kotlinx.coroutines.flow.first
+import java.security.KeyStore
+import javax.crypto.Cipher
+import javax.crypto.KeyGenerator
+import javax.crypto.SecretKey
+import javax.crypto.spec.GCMParameterSpec
+
+private val Context.credDataStore by preferencesDataStore(name = "credentials")
+
+/**
+ * Sparar inloggningsuppgifterna för tyst återinloggning. Lösenordet
+ * AES/GCM-krypteras med en nyckel i Android Keystore — nyckeln lämnar
+ * aldrig enheten och ciphertexten är värdelös utan den.
+ */
+class CredentialStore(private val context: Context) {
+
+    data class Credentials(val username: String, val password: String)
+
+    suspend fun save(username: String, password: String) {
+        val cipher = Cipher.getInstance(TRANSFORM)
+        cipher.init(Cipher.ENCRYPT_MODE, key())
+        val ct = cipher.doFinal(password.toByteArray(Charsets.UTF_8))
+        val blob = Base64.encodeToString(cipher.iv, Base64.NO_WRAP) + ":" +
+            Base64.encodeToString(ct, Base64.NO_WRAP)
+        context.credDataStore.edit {
+            it[KEY_USER] = username
+            it[KEY_PW] = blob
+        }
+    }
+
+    suspend fun load(): Credentials? {
+        val prefs = context.credDataStore.data.first()
+        val user = prefs[KEY_USER] ?: return null
+        val blob = prefs[KEY_PW] ?: return null
+        return runCatching {
+            val (ivB64, ctB64) = blob.split(":", limit = 2)
+            val cipher = Cipher.getInstance(TRANSFORM)
+            cipher.init(
+                Cipher.DECRYPT_MODE,
+                key(),
+                GCMParameterSpec(128, Base64.decode(ivB64, Base64.NO_WRAP)),
+            )
+            Credentials(
+                user,
+                cipher.doFinal(Base64.decode(ctB64, Base64.NO_WRAP)).toString(Charsets.UTF_8),
+            )
+        }.getOrNull()
+    }
+
+    suspend fun clear() {
+        context.credDataStore.edit { it.clear() }
+    }
+
+    private fun key(): SecretKey {
+        val ks = KeyStore.getInstance("AndroidKeyStore").apply { load(null) }
+        (ks.getKey(KEY_ALIAS, null) as? SecretKey)?.let { return it }
+        val generator = KeyGenerator.getInstance(KeyProperties.KEY_ALGORITHM_AES, "AndroidKeyStore")
+        generator.init(
+            KeyGenParameterSpec.Builder(
+                KEY_ALIAS,
+                KeyProperties.PURPOSE_ENCRYPT or KeyProperties.PURPOSE_DECRYPT,
+            )
+                .setBlockModes(KeyProperties.BLOCK_MODE_GCM)
+                .setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_NONE)
+                .build()
+        )
+        return generator.generateKey()
+    }
+
+    companion object {
+        private const val KEY_ALIAS = "fitnessdroid-credentials"
+        private const val TRANSFORM = "AES/GCM/NoPadding"
+        private val KEY_USER = stringPreferencesKey("username")
+        private val KEY_PW = stringPreferencesKey("password_encrypted")
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/data/GraphQlClient.kt

@@ -47,6 +47,11 @@ class GraphQlClient(private val urlProvider: suspend () -> String) {
 
         http.newCall(request).execute().use { response ->
             val text = response.body?.string().orEmpty()
+            // 5xx = servern/proxyn nere — behandla som nätfel (retry) och inte
+            // som ett logiskt API-fel (som t.ex. loggar ut användaren).
+            if (response.code >= 500) {
+                throw java.io.IOException("HTTP ${response.code} från servern")
+            }
             val root = runCatching { json.parseToJsonElement(text).jsonObject }.getOrNull()
                 ?: throw GraphQlException(listOf("HTTP ${response.code}: oväntat svar från servern"))
 

app/src/main/java/eu/brassepc/fitnessdroid/data/GymApi.kt

@@ -1,8 +1,62 @@
 package eu.brassepc.fitnessdroid.data
 
 import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.buildJsonObject
 import kotlinx.serialization.json.decodeFromJsonElement
+import kotlinx.serialization.json.jsonArray
 import kotlinx.serialization.json.jsonObject
+import kotlinx.serialization.json.put
+
+@Serializable
+data class ActivityType(
+    val id: Int,
+    val key: String,
+    val nameSv: String,
+    val nameEn: String = "",
+    val met: Double = 4.0,
+    val category: String = "OTHER",
+    val isDistanceBased: Boolean = false,
+    val isCardio: Boolean = false,
+    val iconKey: String? = null,
+)
+
+@Serializable
+data class Activity(
+    val id: String,
+    val startedAt: String,
+    val durationSeconds: Int,
+    val distanceMeters: Double? = null,
+    val elevationGainMeters: Double? = null,
+    val estimatedKcal: Double? = null,
+    val rpe: Double? = null,
+    val source: String = "manual",
+    val notes: String? = null,
+    val steps: Int? = null,
+    val routePolyline: String? = null,
+    val activityType: ActivityType,
+)
+
+@Serializable
+data class DailySummary(
+    val gymKcal: Double = 0.0,
+    val activityKcal: Double = 0.0,
+    val activeKcal: Double = 0.0,
+    val gymSessionCount: Int = 0,
+    val activityCount: Int = 0,
+    val distanceMeters: Double = 0.0,
+    val bmrKcalPerDay: Double? = null,
+    val phoneKcal: Double? = null,
+    val steps: Int? = null,
+)
+
+@Serializable
+data class GoalProgress(
+    val id: Int,
+    val metric: String,
+    val period: String,
+    val targetValue: Double,
+    val currentValue: Double,
+)
 
 @Serializable
 data class Profile(
@@ -10,6 +64,10 @@ data class Profile(
     val displayName: String? = null,
     val email: String? = null,
     val bodyWeightKg: Double? = null,
+    val heightCm: Double? = null,
+    val birthYear: Int? = null,
+    /** "male"/"female" — serverns konvention */
+    val sex: String? = null,
 )
 
 /** Autentiserade anrop mot gym-API:t. Query-strängarna speglar gymTrackerApi.js. */
@@ -18,14 +76,182 @@ class GymApi(
     private val auth: AuthRepository,
 ) {
     suspend fun myProfile(): Profile {
-        val data = client.execute(MY_PROFILE, token = auth.bearerToken())
+        // Fallback till gamla fältuppsättningen mot en äldre server.
+        val data = try {
+            client.execute(MY_PROFILE, token = auth.bearerToken())
+        } catch (e: GraphQlException) {
+            client.execute(MY_PROFILE_LEGACY, token = auth.bearerToken())
+        }
         val profile = data["myProfile"]?.jsonObject
             ?: throw GraphQlException(listOf("Kunde inte hämta profilen"))
         return client.json.decodeFromJsonElement(profile)
     }
 
+    /** Kroppsdata till servern. null = rör ej, -1/"" = rensa (serverns konvention). */
+    suspend fun updateProfile(heightCm: Double?, birthYear: Int?, sex: String?): Profile {
+        val data = client.execute(
+            "mutation(\$h: Float,\$y: Int,\$s: String){updateProfile(heightCm:\$h,birthYear:\$y,sex:\$s){username displayName email bodyWeightKg heightCm birthYear sex}}",
+            buildJsonObject {
+                heightCm?.let { put("h", it) }
+                birthYear?.let { put("y", it) }
+                sex?.let { put("s", it) }
+            },
+            auth.bearerToken(),
+        )
+        val profile = data["updateProfile"]?.jsonObject
+            ?: throw GraphQlException(listOf("Kunde inte spara kroppsdata"))
+        return client.json.decodeFromJsonElement(profile)
+    }
+
+    /* ---------- Aktiviteter ---------- */
+
+    suspend fun activityTypes(): List<ActivityType> {
+        val data = client.execute(
+            "query{activityTypes{id key nameSv nameEn met category isDistanceBased isCardio iconKey}}",
+            token = auth.bearerToken(),
+        )
+        return data["activityTypes"]!!.jsonArray.map { client.json.decodeFromJsonElement<ActivityType>(it) }
+    }
+
+    suspend fun activities(limit: Int = 50): List<Activity> {
+        val data = client.execute(
+            "query(\$l:Int){activities(limit:\$l){$ACTIVITY_FIELDS}}",
+            buildJsonObject { put("l", limit) },
+            auth.bearerToken(),
+        )
+        return data["activities"]!!.jsonArray.map { client.json.decodeFromJsonElement<Activity>(it) }
+    }
+
+    /**
+     * Logga aktivitet. Servern beräknar kcal (MET/tempo/RPE) om estimatedKcal
+     * utelämnas. null = utelämna fält.
+     */
+    suspend fun addActivity(
+        activityTypeId: Int,
+        startedAtIso: String,
+        durationSeconds: Int,
+        distanceMeters: Double? = null,
+        elevationGainMeters: Double? = null,
+        rpe: Double? = null,
+        estimatedKcal: Double? = null,
+        source: String? = null,
+        routePolyline: String? = null,
+        notes: String? = null,
+        steps: Int? = null,
+    ): Activity {
+        val data = client.execute(
+            "mutation(\$input: AddActivityInput!){addActivity(input:\$input){$ACTIVITY_FIELDS}}",
+            buildJsonObject {
+                put("input", buildJsonObject {
+                    put("activityTypeId", activityTypeId)
+                    put("startedAt", startedAtIso)
+                    put("durationSeconds", durationSeconds)
+                    distanceMeters?.let { put("distanceMeters", it) }
+                    elevationGainMeters?.let { put("elevationGainMeters", it) }
+                    rpe?.let { put("rpe", it) }
+                    steps?.let { put("steps", it) }
+                    estimatedKcal?.let { put("estimatedKcal", it) }
+                    source?.let { put("source", it) }
+                    routePolyline?.let { put("routePolyline", it) }
+                    notes?.let { put("notes", it) }
+                })
+            },
+            auth.bearerToken(),
+        )
+        return client.json.decodeFromJsonElement(data["addActivity"]!!)
+    }
+
+    /** null = rör ej, -1/"" = rensa (serverns konvention). */
+    suspend fun updateActivity(
+        id: String,
+        activityTypeId: Int? = null,
+        startedAtIso: String? = null,
+        durationSeconds: Int? = null,
+        distanceMeters: Double? = null,
+        elevationGainMeters: Double? = null,
+        rpe: Double? = null,
+        notes: String? = null,
+    ): Activity {
+        val data = client.execute(
+            "mutation(\$input: UpdateActivityInput!){updateActivity(input:\$input){$ACTIVITY_FIELDS}}",
+            buildJsonObject {
+                put("input", buildJsonObject {
+                    put("id", id)
+                    activityTypeId?.let { put("activityTypeId", it) }
+                    startedAtIso?.let { put("startedAt", it) }
+                    durationSeconds?.let { put("durationSeconds", it) }
+                    distanceMeters?.let { put("distanceMeters", it) }
+                    elevationGainMeters?.let { put("elevationGainMeters", it) }
+                    rpe?.let { put("rpe", it) }
+                    notes?.let { put("notes", it) }
+                })
+            },
+            auth.bearerToken(),
+        )
+        return client.json.decodeFromJsonElement(data["updateActivity"]!!)
+    }
+
+    suspend fun deleteActivity(id: String) {
+        client.execute(
+            "mutation(\$id: UUID!){deleteActivity(id:\$id)}",
+            buildJsonObject { put("id", id) },
+            auth.bearerToken(),
+        )
+    }
+
+    /** Dagens sammanställning; [dayStartIso] = lokala midnatt som instant. */
+    suspend fun dailySummary(dayStartIso: String): DailySummary {
+        val data = client.execute(
+            "query(\$d:DateTime){dailySummary(date:\$d){gymKcal activityKcal activeKcal gymSessionCount activityCount distanceMeters bmrKcalPerDay phoneKcal steps}}",
+            buildJsonObject { put("d", dayStartIso) },
+            auth.bearerToken(),
+        )
+        return client.json.decodeFromJsonElement(data["dailySummary"]!!)
+    }
+
+    /* ---------- Mål ---------- */
+
+    /** Mål med progress; klienten skickar sina lokala periodstarter som instants. */
+    suspend fun goalsWithProgress(
+        dayStartIso: String,
+        weekStartIso: String,
+        monthStartIso: String,
+    ): List<GoalProgress> {
+        val data = client.execute(
+            "query(\$d:DateTime!,\$w:DateTime!,\$m:DateTime!){goalsWithProgress(dayStart:\$d,weekStart:\$w,monthStart:\$m){id metric period targetValue currentValue}}",
+            buildJsonObject {
+                put("d", dayStartIso); put("w", weekStartIso); put("m", monthStartIso)
+            },
+            auth.bearerToken(),
+        )
+        return data["goalsWithProgress"]!!.jsonArray.map { client.json.decodeFromJsonElement<GoalProgress>(it) }
+    }
+
+    /** Synka upp dagens/gårdagens steg; [dayStartIso] = lokalt dygn 00:00 som instant. */
+    suspend fun upsertDailySteps(dayStartIso: String, steps: Int) {
+        client.execute(
+            "mutation(\$d:DateTime!,\$s:Int!){upsertDailySteps(date:\$d,steps:\$s)}",
+            buildJsonObject { put("d", dayStartIso); put("s", steps) },
+            auth.bearerToken(),
+        )
+    }
+
+    /** targetValue <= 0 tar bort målet. */
+    suspend fun setGoal(metric: String, period: String, targetValue: Double) {
+        client.execute(
+            "mutation(\$m:String!,\$p:String!,\$t:Float!){setGoal(metric:\$m,period:\$p,targetValue:\$t)}",
+            buildJsonObject { put("m", metric); put("p", period); put("t", targetValue) },
+            auth.bearerToken(),
+        )
+    }
+
     companion object {
+        private const val ACTIVITY_FIELDS =
+            "id startedAt durationSeconds distanceMeters elevationGainMeters estimatedKcal rpe source notes steps routePolyline " +
+                "activityType{id key nameSv nameEn met category isDistanceBased isCardio iconKey}"
         private const val MY_PROFILE =
+            "query{myProfile{username displayName email bodyWeightKg heightCm birthYear sex}}"
+        private const val MY_PROFILE_LEGACY =
             "query{myProfile{username displayName email bodyWeightKg}}"
     }
 }

app/src/main/java/eu/brassepc/fitnessdroid/data/GymRepository.kt

@@ -0,0 +1,871 @@
+package eu.brassepc.fitnessdroid.data
+
+import eu.brassepc.fitnessdroid.data.local.AppDatabase
+import eu.brassepc.fitnessdroid.data.local.CachedExerciseType
+import eu.brassepc.fitnessdroid.data.local.CachedMuscle
+import eu.brassepc.fitnessdroid.data.local.CachedMuscleGroup
+import eu.brassepc.fitnessdroid.data.local.CachedStartCard
+import eu.brassepc.fitnessdroid.data.local.LocalExercise
+import eu.brassepc.fitnessdroid.data.local.LocalSession
+import eu.brassepc.fitnessdroid.data.local.LocalSet
+import eu.brassepc.fitnessdroid.data.local.PendingOp
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.launch
+import kotlinx.serialization.json.booleanOrNull
+import kotlinx.serialization.json.buildJsonObject
+import kotlinx.serialization.json.doubleOrNull
+import kotlinx.serialization.json.int
+import kotlinx.serialization.json.intOrNull
+import kotlinx.serialization.json.jsonArray
+import kotlinx.serialization.json.jsonObject
+import kotlinx.serialization.json.jsonPrimitive
+import kotlinx.serialization.json.put
+
+/**
+ * Lokal-först-repository. Allt UI läser Room-flows; alla skrivningar sker
+ * lokalt först och läggs på op-kön som [SyncEngine] driver mot servern.
+ */
+class GymRepository(
+    private val db: AppDatabase,
+    private val client: GraphQlClient,
+    private val auth: AuthRepository,
+    private val sync: SyncEngine,
+    private val store: TokenStore,
+    private val scope: CoroutineScope,
+) {
+    val activeSession = db.sessionDao().activeSession()
+    val exerciseTypes = db.cacheDao().exerciseTypes()
+    val muscleGroups = db.cacheDao().muscleGroups()
+    val muscles = db.cacheDao().muscles()
+    val startCards = db.cacheDao().startCards()
+    val pendingCount = db.opDao().pendingCount()
+    val syncStatus = sync.status
+
+    fun exercises(sessionId: Long) = db.sessionDao().exercises(sessionId)
+    fun setsForSession(sessionId: Long) = db.sessionDao().setsForSession(sessionId)
+
+    private suspend fun enqueue(kind: String, targetLocalId: Long) {
+        db.opDao().enqueue(
+            PendingOp(kind = kind, targetLocalId = targetLocalId, createdAtEpochMs = System.currentTimeMillis())
+        )
+        sync.kick()
+    }
+
+    /* ---------- Passhantering ---------- */
+
+    suspend fun startFreeSession(name: String? = null): Long {
+        val id = db.sessionDao().insertSession(
+            LocalSession(name = name, startedAtEpochMs = System.currentTimeMillis())
+        )
+        enqueue(OpKind.START_SESSION, id)
+        return id
+    }
+
+    /** Starta från favoritpass/mall-kort: skapar passet + alla övningar lokalt. */
+    suspend fun startFromCard(card: CachedStartCard): Long {
+        val sessionId = db.sessionDao().insertSession(
+            LocalSession(name = card.title, startedAtEpochMs = System.currentTimeMillis())
+        )
+        enqueue(OpKind.START_SESSION, sessionId)
+        card.exerciseTypeIds.split(",").mapNotNull { it.trim().toIntOrNull() }
+            .forEachIndexed { index, typeId ->
+                val exId = db.sessionDao().insertExercise(
+                    LocalExercise(sessionId = sessionId, exerciseTypeId = typeId, order = index + 1)
+                )
+                enqueue(OpKind.ADD_EXERCISE, exId)
+            }
+        return sessionId
+    }
+
+    suspend fun addExercise(sessionId: Long, exerciseTypeId: Int): Long {
+        val order = db.sessionDao().exerciseCount(sessionId) + 1
+        val id = db.sessionDao().insertExercise(
+            LocalExercise(sessionId = sessionId, exerciseTypeId = exerciseTypeId, order = order)
+        )
+        enqueue(OpKind.ADD_EXERCISE, id)
+        refreshLastPerformance(exerciseTypeId)
+        return id
+    }
+
+    suspend fun logSet(
+        exerciseId: Long,
+        reps: Int?,
+        weight: Double?,
+        distanceMeters: Double?,
+        durationSeconds: Int?,
+        rpe: Double?,
+        isWarmup: Boolean,
+    ): Long {
+        val order = db.sessionDao().setCount(exerciseId) + 1
+        val id = db.sessionDao().insertSet(
+            LocalSet(
+                exerciseId = exerciseId,
+                order = order,
+                reps = reps,
+                weight = weight,
+                distanceMeters = distanceMeters,
+                durationSeconds = durationSeconds,
+                rpe = rpe,
+                isWarmup = isWarmup,
+                loggedAtEpochMs = System.currentTimeMillis(),
+            )
+        )
+        enqueue(OpKind.ADD_SET, id)
+        // Uppdatera cachens "senaste prestation" för förifyllnad nästa gång.
+        db.sessionDao().exercise(exerciseId)?.let { ex ->
+            db.cacheDao().updateLastPerformance(ex.exerciseTypeId, weight, reps, durationSeconds, distanceMeters)
+        }
+        return id
+    }
+
+    suspend fun updateSet(set: LocalSet) {
+        db.sessionDao().updateSet(set)
+        // Inte synkad än? Då bär den väntande ADD_SET-opsen de nya värdena
+        // automatiskt (den läser raden när den körs). Annars: egen update-op.
+        if (set.serverId != null) enqueue(OpKind.UPDATE_SET, set.id)
+    }
+
+    suspend fun deleteSet(setId: Long) {
+        val set = db.sessionDao().set(setId) ?: return
+        db.sessionDao().deleteSet(setId)
+        // Osynkat set: den väntande ADD-opsen blir en no-op när raden är borta.
+        // Synkat set: ta bort på servern också (server-id:t i op:en, raden finns inte kvar).
+        set.serverId?.let { serverId ->
+            db.opDao().enqueue(
+                PendingOp(
+                    kind = OpKind.REMOVE_SET,
+                    targetLocalId = serverId.toLong(),
+                    createdAtEpochMs = System.currentTimeMillis(),
+                )
+            )
+            sync.kick()
+        }
+    }
+
+    suspend fun completeSession(
+        sessionId: Long,
+        durationSecondsOverride: Int? = null,
+        editedStartEpochMs: Long? = null,
+    ) {
+        val session = db.sessionDao().session(sessionId) ?: return
+        db.sessionDao().updateSession(
+            session.copy(
+                status = "completed",
+                durationSecondsOverride = durationSecondsOverride,
+                editedStartEpochMs = editedStartEpochMs,
+                startedAtEpochMs = editedStartEpochMs ?: session.startedAtEpochMs,
+            )
+        )
+        enqueue(OpKind.COMPLETE_SESSION, sessionId)
+    }
+
+    suspend fun bodyWeightKg(): Double? = store.bodyWeightKg()
+    suspend fun displayName(): String? = store.displayName()
+
+    /* ---------- Aktiviteter (offline-kö) ---------- */
+
+    /** Aktiviteter som väntar på synk — visas överst i aktivitetslistan. */
+    val pendingActivities = db.opDao().pendingActivities()
+
+    /**
+     * Köa en aktivitet lokalt och låt synk-kön skicka den när nätet är
+     * tillbaka (samma mönster som passen). Servern räknar ut kcal vid synk.
+     */
+    suspend fun queueActivity(activity: eu.brassepc.fitnessdroid.data.local.PendingActivity) {
+        val id = db.opDao().enqueueActivity(activity)
+        enqueue(OpKind.ADD_ACTIVITY, id)
+    }
+
+    /* ---------- Kroppsmätningar ---------- */
+
+    suspend fun fetchBodyMeasurements(): List<BodyMeasurement> {
+        val data = client.execute(
+            "query{bodyMeasurements{id date weightKg musclePercent fatPercent waterPercent}}",
+            token = auth.bearerToken(),
+        )
+        return data["bodyMeasurements"]!!.jsonArray.map { m ->
+            val o = m.jsonObject
+            BodyMeasurement(
+                id = o["id"]!!.jsonPrimitive.content,
+                date = o["date"]?.jsonPrimitive?.contentOrNull() ?: "",
+                weightKg = o["weightKg"]?.jsonPrimitive?.doubleOrNull ?: 0.0,
+                musclePercent = o["musclePercent"]?.jsonPrimitive?.doubleOrNull,
+                fatPercent = o["fatPercent"]?.jsonPrimitive?.doubleOrNull,
+                waterPercent = o["waterPercent"]?.jsonPrimitive?.doubleOrNull,
+            )
+        }
+    }
+
+    /** Ny mätning. Faller tillbaka på gamla updateBodyWeight mot äldre API. */
+    suspend fun addBodyMeasurement(
+        weightKg: Double,
+        dateIso: String? = null,
+        musclePercent: Double? = null,
+        fatPercent: Double? = null,
+        waterPercent: Double? = null,
+    ) {
+        try {
+            client.execute(
+                "mutation(\$input: AddBodyMeasurementInput!){addBodyMeasurement(input:\$input){id}}",
+                buildJsonObject {
+                    put("input", buildJsonObject {
+                        put("weightKg", weightKg)
+                        dateIso?.let { put("date", it) }
+                        musclePercent?.let { put("musclePercent", it) }
+                        fatPercent?.let { put("fatPercent", it) }
+                        waterPercent?.let { put("waterPercent", it) }
+                    })
+                },
+                auth.bearerToken(),
+            )
+        } catch (e: GraphQlException) {
+            client.execute(
+                "mutation(\$w: Float){updateBodyWeight(bodyWeightKg:\$w){bodyWeightKg}}",
+                buildJsonObject { put("w", weightKg) },
+                auth.bearerToken(),
+            )
+        }
+        store.saveBodyWeight(weightKg)
+    }
+
+    /** null = rör inte fältet, -1 = rensa (serverns konvention). */
+    suspend fun updateBodyMeasurement(
+        id: String,
+        weightKg: Double,
+        dateIso: String?,
+        musclePercent: Double? = null,
+        fatPercent: Double? = null,
+        waterPercent: Double? = null,
+    ) {
+        client.execute(
+            "mutation(\$input: UpdateBodyMeasurementInput!){updateBodyMeasurement(input:\$input){id}}",
+            buildJsonObject {
+                put("input", buildJsonObject {
+                    put("id", id)
+                    put("weightKg", weightKg)
+                    dateIso?.let { put("date", it) }
+                    musclePercent?.let { put("musclePercent", it) }
+                    fatPercent?.let { put("fatPercent", it) }
+                    waterPercent?.let { put("waterPercent", it) }
+                })
+            },
+            auth.bearerToken(),
+        )
+    }
+
+    suspend fun deleteBodyMeasurement(id: String) {
+        client.execute(
+            "mutation(\$id: UUID!){deleteBodyMeasurement(id:\$id)}",
+            buildJsonObject { put("id", id) },
+            auth.bearerToken(),
+        )
+    }
+
+    /** Cachade personbästa som (exerciseTypeId, reps) → bästa vikt. */
+    suspend fun personalBests(): Map<Pair<Int, Int>, Double> =
+        db.cacheDao().personalBests().associate { (it.exerciseTypeId to it.reps) to it.weight }
+
+    /* ---------- Referensdata / cache ---------- */
+
+    /** Hämta om all referensdata. Tyst vid nätfel — cachen gäller tills vidare. */
+    fun refreshAllAsync() {
+        scope.launch {
+            runCatching { refreshReferenceData() }
+            runCatching { adoptServerActiveSession() }
+            sync.kick()
+        }
+    }
+
+    private suspend fun refreshReferenceData() {
+        val token = auth.bearerToken()
+
+        // Varje sektion för sig, och de nya API-fälten (iconKey,
+        // defaultRestSeconds) med fallback — en äldre server ska aldrig
+        // kunna lämna hela cachen tom.
+        runCatching {
+            val groups = try {
+                client.execute("query{muscleGroups{id name iconKey}}", token = token)
+            } catch (e: GraphQlException) {
+                client.execute("query{muscleGroups{id name}}", token = token)
+            }
+            db.cacheDao().upsertMuscleGroups(
+                groups["muscleGroups"]!!.jsonArray.map {
+                    val o = it.jsonObject
+                    CachedMuscleGroup(
+                        o["id"]!!.jsonPrimitive.int,
+                        o["name"]!!.jsonPrimitive.content,
+                        o["iconKey"]?.jsonPrimitive?.contentOrNull(),
+                    )
+                }
+            )
+        }
+
+        runCatching {
+            val muscles = client.execute("query{muscles{id name muscleGroupId}}", token = token)
+            db.cacheDao().upsertMuscles(
+                muscles["muscles"]!!.jsonArray.map {
+                    val o = it.jsonObject
+                    CachedMuscle(
+                        o["id"]!!.jsonPrimitive.int,
+                        o["name"]!!.jsonPrimitive.content,
+                        o["muscleGroupId"]?.jsonPrimitive?.intOrNull,
+                    )
+                }
+            )
+        }
+
+        runCatching {
+            val pbs = client.execute(
+                "query{personalBests{exerciseTypeId repRecords{reps weight}}}",
+                token = token,
+            )
+            val rows = pbs["personalBests"]!!.jsonArray.flatMap { p ->
+                val po = p.jsonObject
+                val typeId = po["exerciseTypeId"]!!.jsonPrimitive.int
+                po["repRecords"]!!.jsonArray.mapNotNull { r ->
+                    val ro = r.jsonObject
+                    val reps = ro["reps"]?.jsonPrimitive?.intOrNull ?: return@mapNotNull null
+                    val weight = ro["weight"]?.jsonPrimitive?.doubleOrNull ?: return@mapNotNull null
+                    eu.brassepc.fitnessdroid.data.local.CachedPb(
+                        key = "$typeId-$reps",
+                        exerciseTypeId = typeId,
+                        reps = reps,
+                        weight = weight,
+                    )
+                }
+            }
+            db.cacheDao().clearPersonalBests()
+            db.cacheDao().upsertPersonalBests(rows)
+        }
+
+        runCatching {
+            val prof = client.execute("query{myProfile{bodyWeightKg displayName}}", token = token)
+            val p = prof["myProfile"]?.jsonObject
+            store.saveBodyWeight(p?.get("bodyWeightKg")?.jsonPrimitive?.doubleOrNull)
+            store.saveDisplayName(p?.get("displayName")?.jsonPrimitive?.contentOrNull())
+        }
+
+        val favIds: Set<Int> = runCatching {
+            client.execute("query{favoriteExercises{id}}", token = token)["favoriteExercises"]!!
+                .jsonArray.map { it.jsonObject["id"]!!.jsonPrimitive.int }.toSet()
+        }.getOrDefault(emptySet())
+
+        val typeFields =
+            "id name description metValue tracksWeight tracksReps tracksDistance tracksDuration isBodyweight"
+        val types = try {
+            client.execute(
+                "query{exerciseTypes{$typeFields defaultRestSeconds exerciseTypeMuscles{muscle{id}}}}",
+                token = token,
+            )
+        } catch (e: GraphQlException) {
+            client.execute(
+                "query{exerciseTypes{$typeFields exerciseTypeMuscles{muscle{id}}}}",
+                token = token,
+            )
+        }
+        db.cacheDao().replaceExerciseTypes(
+            types["exerciseTypes"]!!.jsonArray.map {
+                val o = it.jsonObject
+                CachedExerciseType(
+                    id = o["id"]!!.jsonPrimitive.int,
+                    name = o["name"]!!.jsonPrimitive.content,
+                    description = o["description"]?.jsonPrimitive?.contentOrNull(),
+                    metValue = o["metValue"]?.jsonPrimitive?.doubleOrNull ?: 5.0,
+                    tracksWeight = o["tracksWeight"]?.jsonPrimitive?.booleanOrNull ?: false,
+                    tracksReps = o["tracksReps"]?.jsonPrimitive?.booleanOrNull ?: false,
+                    tracksDistance = o["tracksDistance"]?.jsonPrimitive?.booleanOrNull ?: false,
+                    tracksDuration = o["tracksDuration"]?.jsonPrimitive?.booleanOrNull ?: false,
+                    isBodyweight = o["isBodyweight"]?.jsonPrimitive?.booleanOrNull ?: false,
+                    defaultRestSeconds = o["defaultRestSeconds"]?.jsonPrimitive?.intOrNull,
+                    muscleIds = o["exerciseTypeMuscles"]?.jsonArray
+                        ?.mapNotNull { m -> m.jsonObject["muscle"]?.jsonObject?.get("id")?.jsonPrimitive?.intOrNull }
+                        ?.joinToString(",") ?: "",
+                    isFavorite = o["id"]!!.jsonPrimitive.int in favIds,
+                )
+            }
+        )
+
+        // Startkort: mallar + favoritpass
+        val cards = mutableListOf<CachedStartCard>()
+        runCatching {
+            val templates = client.execute(
+                "query{workoutTemplates{id name exercises{order exerciseType{id}}}}",
+                token = token,
+            )
+            templates["workoutTemplates"]!!.jsonArray.forEachIndexed { i, t ->
+                val o = t.jsonObject
+                val ids = o["exercises"]!!.jsonArray
+                    .sortedBy { e -> e.jsonObject["order"]?.jsonPrimitive?.intOrNull ?: 0 }
+                    .mapNotNull { e -> e.jsonObject["exerciseType"]?.jsonObject?.get("id")?.jsonPrimitive?.intOrNull }
+                cards += CachedStartCard(
+                    key = "template-${o["id"]!!.jsonPrimitive.int}",
+                    title = o["name"]!!.jsonPrimitive.content,
+                    subtitle = "Mall · ${ids.size} övningar",
+                    exerciseTypeIds = ids.joinToString(","),
+                    templateId = o["id"]!!.jsonPrimitive.int,
+                    sortOrder = i,
+                )
+            }
+        }
+        runCatching {
+            val favs = client.execute(
+                "query{favoriteGymSessions{id name gymSessionExercises{order exerciseType{id}}}}",
+                token = token,
+            )
+            favs["favoriteGymSessions"]!!.jsonArray.forEachIndexed { i, s ->
+                val o = s.jsonObject
+                val ids = o["gymSessionExercises"]!!.jsonArray
+                    .sortedBy { e -> e.jsonObject["order"]?.jsonPrimitive?.intOrNull ?: 0 }
+                    .mapNotNull { e -> e.jsonObject["exerciseType"]?.jsonObject?.get("id")?.jsonPrimitive?.intOrNull }
+                cards += CachedStartCard(
+                    key = "favsession-${o["id"]!!.jsonPrimitive.int}",
+                    title = o["name"]?.jsonPrimitive?.contentOrNull() ?: "Favoritpass",
+                    subtitle = "Favorit · ${ids.size} övningar",
+                    exerciseTypeIds = ids.joinToString(","),
+                    sortOrder = 100 + i,
+                )
+            }
+        }
+        db.cacheDao().clearStartCards()
+        db.cacheDao().upsertStartCards(cards)
+    }
+
+    /** Om servern har ett aktivt pass men appen saknar ett: ta över det lokalt. */
+    private suspend fun adoptServerActiveSession() {
+        if (db.sessionDao().activeSessionIdNow() != null) return
+        val token = auth.bearerToken()
+        val data = client.execute(
+            "query{activeGymSession{id name notes startTime gymSessionExercises{id order notes exerciseType{id} sets{id order reps weight distanceMeters durationSeconds rpe isWarmup isCompleted}}}}",
+            token = token,
+        )
+        val s = data["activeGymSession"] ?: return
+        if (s is kotlinx.serialization.json.JsonNull) return
+        val o = s.jsonObject
+        val sessionId = db.sessionDao().insertSession(
+            LocalSession(
+                serverId = o["id"]!!.jsonPrimitive.int,
+                name = o["name"]?.jsonPrimitive?.contentOrNull(),
+                notes = o["notes"]?.jsonPrimitive?.contentOrNull(),
+                startedAtEpochMs = System.currentTimeMillis(),
+            )
+        )
+        o["gymSessionExercises"]?.jsonArray?.forEach { e ->
+            val eo = e.jsonObject
+            val exId = db.sessionDao().insertExercise(
+                LocalExercise(
+                    sessionId = sessionId,
+                    serverId = eo["id"]!!.jsonPrimitive.int,
+                    exerciseTypeId = eo["exerciseType"]!!.jsonObject["id"]!!.jsonPrimitive.int,
+                    order = eo["order"]?.jsonPrimitive?.intOrNull ?: 0,
+                    notes = eo["notes"]?.jsonPrimitive?.contentOrNull(),
+                )
+            )
+            eo["sets"]?.jsonArray?.forEach { st ->
+                val so = st.jsonObject
+                db.sessionDao().insertSet(
+                    LocalSet(
+                        exerciseId = exId,
+                        serverId = so["id"]!!.jsonPrimitive.int,
+                        order = so["order"]?.jsonPrimitive?.intOrNull ?: 0,
+                        reps = so["reps"]?.jsonPrimitive?.intOrNull,
+                        weight = so["weight"]?.jsonPrimitive?.doubleOrNull,
+                        distanceMeters = so["distanceMeters"]?.jsonPrimitive?.doubleOrNull,
+                        durationSeconds = so["durationSeconds"]?.jsonPrimitive?.intOrNull,
+                        rpe = so["rpe"]?.jsonPrimitive?.doubleOrNull,
+                        isWarmup = so["isWarmup"]?.jsonPrimitive?.booleanOrNull ?: false,
+                        isCompleted = so["isCompleted"]?.jsonPrimitive?.booleanOrNull ?: true,
+                        loggedAtEpochMs = System.currentTimeMillis(),
+                    )
+                )
+            }
+        }
+    }
+
+    private fun refreshLastPerformance(exerciseTypeId: Int) {
+        scope.launch {
+            runCatching {
+                val data = client.execute(
+                    "query(\$id:Int!){lastExercisePerformance(exerciseTypeId:\$id){sets{reps weight distanceMeters durationSeconds}}}",
+                    buildJsonObject { put("id", exerciseTypeId) },
+                    auth.bearerToken(),
+                )
+                val perf = data["lastExercisePerformance"] ?: return@launch
+                if (perf is kotlinx.serialization.json.JsonNull) return@launch
+                val best = perf.jsonObject["sets"]?.jsonArray?.lastOrNull()?.jsonObject ?: return@launch
+                db.cacheDao().updateLastPerformance(
+                    exerciseTypeId,
+                    best["weight"]?.jsonPrimitive?.doubleOrNull,
+                    best["reps"]?.jsonPrimitive?.intOrNull,
+                    best["durationSeconds"]?.jsonPrimitive?.intOrNull,
+                    best["distanceMeters"]?.jsonPrimitive?.doubleOrNull,
+                )
+            }
+        }
+    }
+
+    fun toggleFavoriteExercise(exerciseTypeId: Int, favorite: Boolean) {
+        scope.launch {
+            db.cacheDao().setExerciseFavorite(exerciseTypeId, favorite)
+            runCatching {
+                val mutation = if (favorite) {
+                    "mutation(\$id:Int!){addFavoriteExercise(exerciseTypeId:\$id){id}}"
+                } else {
+                    "mutation(\$id:Int!){removeFavoriteExercise(exerciseTypeId:\$id)}"
+                }
+                client.execute(mutation, buildJsonObject { put("id", exerciseTypeId) }, auth.bearerToken())
+            }
+        }
+    }
+
+    /** Full detalj för ett avslutat pass. */
+    suspend fun fetchSessionDetail(id: Int): SessionDetail {
+        val data = client.execute(
+            "query(\$id:Int!){gymSession(id:\$id){id name notes date startTime endTime durationSecondsOverride estimatedCalories gymSessionExercises{order exerciseType{name} sets{order reps weight distanceMeters durationSeconds rpe isWarmup}}}}",
+            buildJsonObject { put("id", id) },
+            auth.bearerToken(),
+        )
+        val o = data["gymSession"]!!.jsonObject
+        return SessionDetail(
+            id = o["id"]!!.jsonPrimitive.int,
+            name = o["name"]?.jsonPrimitive?.contentOrNull() ?: "Pass",
+            date = (o["date"]?.jsonPrimitive?.contentOrNull()
+                ?: o["startTime"]?.jsonPrimitive?.contentOrNull()).orEmpty(),
+            notes = o["notes"]?.jsonPrimitive?.contentOrNull(),
+            calories = o["estimatedCalories"]?.jsonPrimitive?.doubleOrNull,
+            durationMinutes = durationMinutes(
+                o["durationSecondsOverride"]?.jsonPrimitive?.intOrNull,
+                o["startTime"]?.jsonPrimitive?.contentOrNull(),
+                o["endTime"]?.jsonPrimitive?.contentOrNull(),
+            ),
+            exercises = o["gymSessionExercises"]!!.jsonArray
+                .sortedBy { it.jsonObject["order"]?.jsonPrimitive?.intOrNull ?: 0 }
+                .map { e ->
+                    val eo = e.jsonObject
+                    SessionDetailExercise(
+                        name = eo["exerciseType"]?.jsonObject?.get("name")?.jsonPrimitive?.contentOrNull()
+                            ?: "Övning",
+                        sets = eo["sets"]!!.jsonArray.map(::parseHistorySet)
+                            .sortedBy { it.order },
+                    )
+                },
+        )
+    }
+
+    /**
+     * Historik för en övning: tidigare pass med dess set, plus tyngsta
+     * lyften de senaste tre månaderna. Filtreras klient-side ur de
+     * senaste avslutade passen.
+     */
+    suspend fun fetchExerciseHistory(exerciseTypeId: Int, limit: Int = 40): ExerciseHistory {
+        val data = client.execute(
+            "query(\$s:String,\$l:Int){gymSessions(status:\$s,limit:\$l){name date startTime gymSessionExercises{exerciseType{id} sets{order reps weight distanceMeters durationSeconds rpe isWarmup}}}}",
+            buildJsonObject { put("s", "completed"); put("l", limit) },
+            auth.bearerToken(),
+        )
+        val entries = data["gymSessions"]!!.jsonArray.mapNotNull { s ->
+            val o = s.jsonObject
+            val sets = o["gymSessionExercises"]!!.jsonArray
+                .filter {
+                    it.jsonObject["exerciseType"]?.jsonObject?.get("id")?.jsonPrimitive?.intOrNull == exerciseTypeId
+                }
+                .flatMap { it.jsonObject["sets"]!!.jsonArray }
+                .map(::parseHistorySet)
+                .sortedBy { it.order }
+            if (sets.isEmpty()) return@mapNotNull null
+            ExerciseHistoryEntry(
+                date = (o["date"]?.jsonPrimitive?.contentOrNull()
+                    ?: o["startTime"]?.jsonPrimitive?.contentOrNull()).orEmpty().take(10),
+                sessionName = o["name"]?.jsonPrimitive?.contentOrNull() ?: "Pass",
+                sets = sets,
+            )
+        }.sortedByDescending { it.date }
+
+        val cutoff = java.time.LocalDate.now().minusMonths(3).toString()
+        val topLifts = entries
+            .filter { it.date >= cutoff }
+            .flatMap { entry ->
+                entry.sets.filter { !it.isWarmup && it.weight != null }
+                    .map { TopLift(entry.date, it.weight!!, it.reps) }
+            }
+            .sortedWith(compareByDescending<TopLift> { it.weight }.thenByDescending { it.reps ?: 0 })
+            .take(10)
+
+        return ExerciseHistory(entries = entries, topLifts = topLifts)
+    }
+
+    private fun parseHistorySet(element: kotlinx.serialization.json.JsonElement): HistorySet {
+        val so = element.jsonObject
+        return HistorySet(
+            order = so["order"]?.jsonPrimitive?.intOrNull ?: 0,
+            weight = so["weight"]?.jsonPrimitive?.doubleOrNull,
+            reps = so["reps"]?.jsonPrimitive?.intOrNull,
+            distanceMeters = so["distanceMeters"]?.jsonPrimitive?.doubleOrNull,
+            durationSeconds = so["durationSeconds"]?.jsonPrimitive?.intOrNull,
+            rpe = so["rpe"]?.jsonPrimitive?.doubleOrNull,
+            isWarmup = so["isWarmup"]?.jsonPrimitive?.booleanOrNull ?: false,
+        )
+    }
+
+    /** Statistik för en period: KPI:er + muskelvolym + PB-lista. */
+    suspend fun fetchStats(period: String, referenceDate: String? = null): StatsBundle {
+        val token = auth.bearerToken()
+
+        val summaryData = client.execute(
+            "query(\$p:String!,\$d:String){gymSessionSummary(period:\$p,referenceDate:\$d){" +
+                "sessionCount totalDurationMinutes avgDurationMinutes totalCalories totalVolumeKg totalSets totalReps " +
+                "sessionsPerWeek currentStreakWeeks " +
+                "previous{sessionCount totalDurationMinutes totalCalories totalVolumeKg totalSets} " +
+                "trend{label totalVolumeKg sessionCount} " +
+                "highlights{heaviestLift{exerciseName weight reps date} newPrCount}}}",
+            buildJsonObject { put("p", period); referenceDate?.let { put("d", it) } },
+            token,
+        )
+        val s = summaryData["gymSessionSummary"]!!.jsonObject
+        val prev = s["previous"]?.takeIf { it !is kotlinx.serialization.json.JsonNull }?.jsonObject
+        val highlights = s["highlights"]?.takeIf { it !is kotlinx.serialization.json.JsonNull }?.jsonObject
+        val heaviest = highlights?.get("heaviestLift")
+            ?.takeIf { it !is kotlinx.serialization.json.JsonNull }?.jsonObject
+
+        val muscleVolumes: Map<String, Double> = runCatching {
+            val ws = client.execute(
+                "query(\$p:String!,\$d:String){workoutStats(period:\$p,referenceDate:\$d){muscleGroupStats{muscleGroupName totalVolume}}}",
+                buildJsonObject { put("p", period); referenceDate?.let { put("d", it) } },
+                token,
+            )
+            ws["workoutStats"]!!.jsonObject["muscleGroupStats"]!!.jsonArray.associate {
+                val o = it.jsonObject
+                (o["muscleGroupName"]?.jsonPrimitive?.contentOrNull() ?: "?") to
+                    (o["totalVolume"]?.jsonPrimitive?.doubleOrNull ?: 0.0)
+            }
+        }.getOrDefault(emptyMap())
+
+        val pbs: List<PbEntry> = runCatching {
+            val pb = client.execute(
+                "query{personalBests{exerciseTypeName repRecords{reps weight date}}}",
+                token = token,
+            )
+            pb["personalBests"]!!.jsonArray.map { p ->
+                val po = p.jsonObject
+                PbEntry(
+                    exerciseName = po["exerciseTypeName"]?.jsonPrimitive?.contentOrNull() ?: "Övning",
+                    records = po["repRecords"]!!.jsonArray.mapNotNull { r ->
+                        val ro = r.jsonObject
+                        PbRecord(
+                            reps = ro["reps"]?.jsonPrimitive?.intOrNull ?: return@mapNotNull null,
+                            weight = ro["weight"]?.jsonPrimitive?.doubleOrNull ?: return@mapNotNull null,
+                            date = ro["date"]?.jsonPrimitive?.contentOrNull()?.take(10) ?: "",
+                        )
+                    }.sortedBy { it.reps },
+                )
+            }.sortedBy { it.exerciseName }
+        }.getOrDefault(emptyList())
+
+        fun kpi(key: String) = s[key]?.jsonPrimitive?.doubleOrNull ?: 0.0
+        fun prevKpi(key: String) = prev?.get(key)?.jsonPrimitive?.doubleOrNull
+
+        return StatsBundle(
+            sessionCount = kpi("sessionCount").toInt(),
+            prevSessionCount = prevKpi("sessionCount")?.toInt(),
+            totalDurationMinutes = kpi("totalDurationMinutes").toInt(),
+            prevDurationMinutes = prevKpi("totalDurationMinutes")?.toInt(),
+            totalCalories = kpi("totalCalories"),
+            prevCalories = prevKpi("totalCalories"),
+            totalVolumeKg = kpi("totalVolumeKg"),
+            prevVolumeKg = prevKpi("totalVolumeKg"),
+            totalSets = kpi("totalSets").toInt(),
+            totalReps = kpi("totalReps").toInt(),
+            sessionsPerWeek = kpi("sessionsPerWeek"),
+            streakWeeks = kpi("currentStreakWeeks").toInt(),
+            trend = s["trend"]?.jsonArray?.map {
+                val o = it.jsonObject
+                TrendBucket(
+                    label = o["label"]?.jsonPrimitive?.contentOrNull() ?: "",
+                    volumeKg = o["totalVolumeKg"]?.jsonPrimitive?.doubleOrNull ?: 0.0,
+                    sessionCount = o["sessionCount"]?.jsonPrimitive?.intOrNull ?: 0,
+                )
+            }.orEmpty(),
+            heaviestLift = heaviest?.let {
+                "${it["exerciseName"]?.jsonPrimitive?.contentOrNull()}: " +
+                    "${it["weight"]?.jsonPrimitive?.doubleOrNull ?: 0.0} kg × " +
+                    "${it["reps"]?.jsonPrimitive?.intOrNull ?: 0}"
+            },
+            newPrCount = highlights?.get("newPrCount")?.jsonPrimitive?.intOrNull ?: 0,
+            muscleVolumes = muscleVolumes,
+            personalBests = pbs,
+        )
+    }
+
+    /** Serverns kaloriberäkning och tidsfördelning för ett pass. */
+    suspend fun fetchSessionStats(id: Int): SessionStats {
+        val data = client.execute(
+            "query(\$id:Int!){gymSessionStats(id:\$id){durationMinutes estimatedCalories totalSets totalReps totalVolumeKg exerciseBreakdown{exerciseTypeId exerciseName allocatedSeconds estimatedCalories totalSets totalReps maxWeight volumeKg}}}",
+            buildJsonObject { put("id", id) },
+            auth.bearerToken(),
+        )
+        val o = data["gymSessionStats"]!!.jsonObject
+        return SessionStats(
+            durationMinutes = o["durationMinutes"]?.jsonPrimitive?.intOrNull,
+            estimatedCalories = o["estimatedCalories"]?.jsonPrimitive?.doubleOrNull,
+            totalSets = o["totalSets"]?.jsonPrimitive?.intOrNull ?: 0,
+            totalReps = o["totalReps"]?.jsonPrimitive?.intOrNull ?: 0,
+            totalVolumeKg = o["totalVolumeKg"]?.jsonPrimitive?.doubleOrNull ?: 0.0,
+            breakdown = o["exerciseBreakdown"]?.jsonArray?.map { e ->
+                val eo = e.jsonObject
+                val typeId = eo["exerciseTypeId"]?.jsonPrimitive?.intOrNull
+                ExerciseStats(
+                    exerciseTypeId = typeId,
+                    name = eo["exerciseName"]?.jsonPrimitive?.contentOrNull() ?: "Övning",
+                    allocatedSeconds = eo["allocatedSeconds"]?.jsonPrimitive?.intOrNull,
+                    estimatedCalories = eo["estimatedCalories"]?.jsonPrimitive?.doubleOrNull,
+                    metValue = typeId?.let { db.cacheDao().exerciseType(it)?.metValue },
+                )
+            }.orEmpty(),
+        )
+    }
+
+    /** Historik hämtas direkt (ingen offline-garanti i v1). */
+    suspend fun fetchHistory(limit: Int = 30): List<HistoryItem> {
+        val data = client.execute(
+            "query(\$s:String,\$l:Int){gymSessions(status:\$s,limit:\$l){id name date startTime endTime durationSecondsOverride estimatedCalories gymSessionExercises{id sets{id weight reps}}}}",
+            buildJsonObject { put("s", "completed"); put("l", limit) },
+            auth.bearerToken(),
+        )
+        return data["gymSessions"]!!.jsonArray.map { s ->
+            val o = s.jsonObject
+            val sets = o["gymSessionExercises"]!!.jsonArray.flatMap { it.jsonObject["sets"]!!.jsonArray }
+            val volume = sets.sumOf { st ->
+                val so = st.jsonObject
+                (so["weight"]?.jsonPrimitive?.doubleOrNull ?: 0.0) * (so["reps"]?.jsonPrimitive?.intOrNull ?: 0)
+            }
+            HistoryItem(
+                id = o["id"]!!.jsonPrimitive.int,
+                name = o["name"]?.jsonPrimitive?.contentOrNull() ?: "Pass",
+                date = o["date"]?.jsonPrimitive?.contentOrNull()
+                    ?: o["startTime"]?.jsonPrimitive?.contentOrNull() ?: "",
+                exerciseCount = o["gymSessionExercises"]!!.jsonArray.size,
+                setCount = sets.size,
+                volumeKg = volume,
+                calories = o["estimatedCalories"]?.jsonPrimitive?.doubleOrNull,
+                durationMinutes = durationMinutes(
+                    o["durationSecondsOverride"]?.jsonPrimitive?.intOrNull,
+                    o["startTime"]?.jsonPrimitive?.contentOrNull(),
+                    o["endTime"]?.jsonPrimitive?.contentOrNull(),
+                ),
+            )
+        }
+    }
+
+    /** Passlängd i minuter: manuell rättning vinner, annars slut − start. */
+    private fun durationMinutes(overrideSeconds: Int?, start: String?, end: String?): Int? {
+        overrideSeconds?.let { return it / 60 }
+        if (start == null || end == null) return null
+        return runCatching {
+            val s = java.time.OffsetDateTime.parse(start)
+            val e = java.time.OffsetDateTime.parse(end)
+            java.time.Duration.between(s, e).toMinutes().toInt().takeIf { it >= 0 }
+        }.getOrNull()
+    }
+}
+
+data class HistoryItem(
+    val id: Int,
+    val name: String,
+    val date: String,
+    val exerciseCount: Int,
+    val setCount: Int,
+    val volumeKg: Double,
+    val calories: Double?,
+    val durationMinutes: Int? = null,
+)
+
+data class HistorySet(
+    val order: Int,
+    val weight: Double?,
+    val reps: Int?,
+    val distanceMeters: Double?,
+    val durationSeconds: Int?,
+    val rpe: Double?,
+    val isWarmup: Boolean,
+)
+
+data class SessionDetail(
+    val id: Int,
+    val name: String,
+    val date: String,
+    val notes: String?,
+    val calories: Double?,
+    val durationMinutes: Int? = null,
+    val exercises: List<SessionDetailExercise>,
+)
+
+data class SessionDetailExercise(
+    val name: String,
+    val sets: List<HistorySet>,
+)
+
+data class ExerciseHistoryEntry(
+    val date: String,
+    val sessionName: String,
+    val sets: List<HistorySet>,
+)
+
+data class TopLift(val date: String, val weight: Double, val reps: Int?)
+
+data class ExerciseHistory(
+    val entries: List<ExerciseHistoryEntry>,
+    val topLifts: List<TopLift>,
+)
+
+data class SessionStats(
+    val durationMinutes: Int?,
+    val estimatedCalories: Double?,
+    val totalSets: Int,
+    val totalReps: Int,
+    val totalVolumeKg: Double,
+    val breakdown: List<ExerciseStats>,
+)
+
+data class ExerciseStats(
+    val exerciseTypeId: Int?,
+    val name: String,
+    val allocatedSeconds: Int?,
+    val estimatedCalories: Double?,
+    val metValue: Double?,
+)
+
+data class BodyMeasurement(
+    val id: String,
+    val date: String,
+    val weightKg: Double,
+    val musclePercent: Double?,
+    val fatPercent: Double?,
+    val waterPercent: Double?,
+)
+
+data class TrendBucket(val label: String, val volumeKg: Double, val sessionCount: Int)
+data class PbRecord(val reps: Int, val weight: Double, val date: String)
+data class PbEntry(val exerciseName: String, val records: List<PbRecord>)
+
+data class StatsBundle(
+    val sessionCount: Int,
+    val prevSessionCount: Int?,
+    val totalDurationMinutes: Int,
+    val prevDurationMinutes: Int?,
+    val totalCalories: Double,
+    val prevCalories: Double?,
+    val totalVolumeKg: Double,
+    val prevVolumeKg: Double?,
+    val totalSets: Int,
+    val totalReps: Int,
+    val sessionsPerWeek: Double,
+    val streakWeeks: Int,
+    val trend: List<TrendBucket>,
+    val heaviestLift: String?,
+    val newPrCount: Int,
+    /** muskelgruppnamn → volym kg (för kroppskartan) */
+    val muscleVolumes: Map<String, Double>,
+    val personalBests: List<PbEntry>,
+)
+
+private fun kotlinx.serialization.json.JsonPrimitive.contentOrNull(): String? =
+    if (this is kotlinx.serialization.json.JsonNull) null else content

app/src/main/java/eu/brassepc/fitnessdroid/data/RestTimer.kt

@@ -0,0 +1,102 @@
+package eu.brassepc.fitnessdroid.data
+
+import android.content.Context
+import android.media.RingtoneManager
+import android.os.VibrationEffect
+import android.os.VibratorManager
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.launch
+
+data class RestState(
+    val totalSeconds: Int,
+    val endsAtEpochMs: Long,
+    val secondsLeft: Int,
+    val finished: Boolean = false,
+)
+
+/**
+ * Vilotimern. Räknar mot en absolut sluttid (överlever att appen pausas)
+ * och larmar enligt inställningarna när tiden är ute.
+ */
+class RestTimerController(
+    private val context: Context,
+    private val settingsStore: SettingsStore,
+    private val scope: CoroutineScope,
+) {
+    private val _state = MutableStateFlow<RestState?>(null)
+    val state: StateFlow<RestState?> = _state
+
+    private var ticker: Job? = null
+
+    fun start(seconds: Int? = null) {
+        scope.launch {
+            val settings = settingsStore.settings.first()
+            val total = seconds ?: settings.defaultRestSeconds
+            _state.value = RestState(
+                totalSeconds = total,
+                endsAtEpochMs = System.currentTimeMillis() + total * 1000L,
+                secondsLeft = total,
+            )
+            startTicker()
+        }
+    }
+
+    fun adjust(deltaSeconds: Int) {
+        val current = _state.value ?: return
+        if (current.finished) return
+        _state.value = current.copy(
+            endsAtEpochMs = (current.endsAtEpochMs + deltaSeconds * 1000L)
+                .coerceAtLeast(System.currentTimeMillis()),
+            totalSeconds = (current.totalSeconds + deltaSeconds).coerceAtLeast(5),
+        )
+    }
+
+    fun dismiss() {
+        ticker?.cancel()
+        _state.value = null
+    }
+
+    private fun startTicker() {
+        ticker?.cancel()
+        ticker = scope.launch {
+            while (true) {
+                val current = _state.value ?: return@launch
+                val left = (((current.endsAtEpochMs - System.currentTimeMillis()) + 999) / 1000)
+                    .coerceAtLeast(0).toInt()
+                if (left != current.secondsLeft) {
+                    _state.value = current.copy(secondsLeft = left)
+                }
+                if (left <= 0) {
+                    _state.value = _state.value?.copy(secondsLeft = 0, finished = true)
+                    alert()
+                    // Låt "klart"-läget synas en stund, försvinn sedan självmant.
+                    delay(8_000)
+                    if (_state.value?.finished == true) _state.value = null
+                    return@launch
+                }
+                delay(250)
+            }
+        }
+    }
+
+    private suspend fun alert() {
+        when (settingsStore.settings.first().restAlert) {
+            RestAlert.SOUND -> runCatching {
+                val uri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION)
+                RingtoneManager.getRingtone(context, uri)?.play()
+            }
+            RestAlert.VIBRATE -> runCatching {
+                val vm = context.getSystemService(Context.VIBRATOR_MANAGER_SERVICE) as VibratorManager
+                vm.defaultVibrator.vibrate(
+                    VibrationEffect.createWaveform(longArrayOf(0, 350, 150, 350, 150, 500), -1)
+                )
+            }
+            RestAlert.VISUAL, RestAlert.NONE -> Unit
+        }
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/data/ScaleManager.kt

@@ -0,0 +1,110 @@
+package eu.brassepc.fitnessdroid.data
+
+import android.content.Context
+import com.health.openscale.core.bluetooth.BluetoothEvent
+import com.health.openscale.core.bluetooth.ScaleCommunicator
+import com.health.openscale.core.bluetooth.ScaleFactory
+import com.health.openscale.core.data.GenderType
+import com.health.openscale.core.data.User
+import com.health.openscale.core.facade.MeasurementFacade
+import com.health.openscale.core.facade.SettingsFacade
+import com.health.openscale.core.facade.UserFacade
+import com.health.openscale.core.service.BluetoothScannerManager
+import com.health.openscale.core.service.ScannedDeviceInfo
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.launch
+import java.util.Calendar
+
+/**
+ * Brygga mellan appen och de vendrade openScale-drivrutinerna.
+ * Äger facade-shims, [ScaleFactory] och skannern, och exponerar ett enkelt
+ * flöde för UI:t: skanna → spara våg → väg dig (events + mätresultat).
+ */
+class ScaleManager(
+    context: Context,
+    private val settingsStore: SettingsStore,
+    private val scope: CoroutineScope,
+) {
+    private val appContext = context.applicationContext
+
+    private val settingsFacade = SettingsFacade(appContext)
+    private val userFacade = UserFacade()
+    private val measurementFacade = MeasurementFacade()
+
+    val factory = ScaleFactory(appContext, settingsFacade, measurementFacade, userFacade)
+    val scanner by lazy { BluetoothScannerManager(appContext, scope, factory) }
+
+    private var communicator: ScaleCommunicator? = null
+    private var eventJob: Job? = null
+
+    /** Senaste händelsen från vågen — UI:t visar status utifrån denna. */
+    private val _lastEvent = MutableStateFlow<BluetoothEvent?>(null)
+    val lastEvent: StateFlow<BluetoothEvent?> = _lastEvent.asStateFlow()
+
+    /**
+     * Uppdatera drivrutinernas användarprofil från appens inställningar.
+     * Impedansvågar (som Exingtech Y1) får kön/ålder/längd skrivna till sig
+     * och räknar ut kroppssammansättningen ombord.
+     */
+    private suspend fun refreshScaleUser() {
+        val s = settingsStore.settings.first()
+        val birthMillis = s.birthYear?.let { year ->
+            Calendar.getInstance().apply { set(year, Calendar.JULY, 1, 12, 0, 0) }.timeInMillis
+        }
+        userFacade.setSelectedUser(
+            User(
+                id = 1,
+                name = "FitnessDroid",
+                birthDate = birthMillis,
+                heightCm = s.heightCm?.toFloat() ?: -1f,
+                gender = if (s.isFemale == true) GenderType.FEMALE else GenderType.MALE,
+            )
+        )
+    }
+
+    /** Har användaren fyllt i kroppsdatan som vågen behöver? */
+    suspend fun hasBodyData(): Boolean {
+        val s = settingsStore.settings.first()
+        return s.heightCm != null && s.birthYear != null && s.isFemale != null
+    }
+
+    /**
+     * Anslut till den sparade vågen och börja lyssna på händelser.
+     * Resultatet (inklusive [BluetoothEvent.MeasurementReceived]) kommer i [lastEvent].
+     * @return false om ingen våg är sparad eller ingen drivrutin matchar.
+     */
+    suspend fun connectSavedScale(): Boolean {
+        val s = settingsStore.settings.first()
+        val address = s.scaleAddress ?: return false
+        val name = s.scaleName ?: ""
+
+        refreshScaleUser()
+        disconnect()
+
+        val info = ScannedDeviceInfo(name, address, 0, emptyList(), null)
+        val comm = factory.createCommunicator(info) ?: return false
+        communicator = comm
+
+        _lastEvent.value = null
+        eventJob = scope.launch {
+            comm.getEventsFlow().collect { _lastEvent.value = it }
+        }
+        comm.connect(address, null)
+        return true
+    }
+
+    fun disconnect() {
+        eventJob?.cancel()
+        eventJob = null
+        communicator?.let { comm ->
+            runCatching { comm.disconnect() }
+            runCatching { (comm as? AutoCloseable)?.close() }
+        }
+        communicator = null
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/data/SettingsStore.kt

@@ -0,0 +1,194 @@
+package eu.brassepc.fitnessdroid.data
+
+import android.content.Context
+import androidx.datastore.preferences.core.edit
+import androidx.datastore.preferences.core.intPreferencesKey
+import androidx.datastore.preferences.core.stringPreferencesKey
+import androidx.datastore.preferences.preferencesDataStore
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.map
+
+private val Context.settingsDataStore by preferencesDataStore(name = "settings")
+
+enum class RestTimerStyle { FULLSCREEN, BANNER }
+enum class RestAlert { SOUND, VIBRATE, VISUAL, NONE }
+
+data class AppSettings(
+    val restTimerStyle: RestTimerStyle = RestTimerStyle.FULLSCREEN,
+    val restAlert: RestAlert = RestAlert.VIBRATE,
+    val defaultRestSeconds: Int = 90,
+    /** Steg för viktstepparna i passläget (kg) */
+    val weightStep: Double = 2.5,
+    /** Spara inloggningen krypterat och logga in tyst igen vid behov */
+    val autoRelogin: Boolean = true,
+    /** Egna stångvikter i skivkalkylatorn (utöver snabbvalen 20/0 kg) */
+    val customBarWeights: List<Double> = listOf(15.0),
+    /** Sparad Bluetooth-våg (MAC-adress + BLE-namn + drivrutinens visningsnamn) */
+    val scaleAddress: String? = null,
+    val scaleName: String? = null,
+    val scaleDriver: String? = null,
+    /** Kroppsdata som impedansvågar behöver (skickas till vågen vid vägning) */
+    val heightCm: Double? = null,
+    val birthYear: Int? = null,
+    /** null = inte satt, false = man, true = kvinna */
+    val isFemale: Boolean? = null,
+    /** Visa teknisk logg på spårskärmen (felsökning) */
+    val trackLogEnabled: Boolean = false,
+    /** GPS-filter: förkasta fixar med sämre noggrannhet än detta (meter) */
+    val gpsAccuracyLimitM: Int = 35,
+    /** GPS-filter: max tillåten positionsfart som multipel av Doppler-farten */
+    val gpsSpeedFactor: Double = 2.0,
+    /** GPS-filter: fartgolv (km/h) när Doppler-fart saknas/är noll */
+    val gpsSpeedFloorKmh: Int = 12,
+    /** Rörelsevakt: frys spår/distans när accelerometern säger stilla */
+    val motionGuardEnabled: Boolean = true,
+    /** Rörelsevaktens känslighet (m/s² avvikelse från vila; lägre = känsligare) */
+    val motionThreshold: Double = 0.35,
+    /** Nedräkning (sekunder) när man trycker play på en aktivitet */
+    val countdownSeconds: Int = 3,
+)
+
+class SettingsStore(private val context: Context) {
+
+    val settings: Flow<AppSettings> = context.settingsDataStore.data.map { prefs ->
+        AppSettings(
+            restTimerStyle = prefs[KEY_TIMER_STYLE]?.let {
+                runCatching { RestTimerStyle.valueOf(it) }.getOrNull()
+            } ?: RestTimerStyle.FULLSCREEN,
+            restAlert = prefs[KEY_REST_ALERT]?.let {
+                runCatching { RestAlert.valueOf(it) }.getOrNull()
+            } ?: RestAlert.VIBRATE,
+            defaultRestSeconds = prefs[KEY_REST_SECONDS] ?: 90,
+            weightStep = prefs[KEY_WEIGHT_STEP]?.toDoubleOrNull() ?: 2.5,
+            autoRelogin = prefs[KEY_AUTO_RELOGIN]?.toBooleanStrictOrNull() ?: true,
+            customBarWeights = prefs[KEY_CUSTOM_BARS]?.split(",")
+                ?.mapNotNull { it.toDoubleOrNull() }
+                // migrera från gamla enkel-värdet
+                ?: prefs[KEY_CUSTOM_BAR]?.toDoubleOrNull()?.let { listOf(it) }
+                ?: listOf(15.0),
+            scaleAddress = prefs[KEY_SCALE_ADDRESS],
+            scaleName = prefs[KEY_SCALE_NAME],
+            scaleDriver = prefs[KEY_SCALE_DRIVER],
+            heightCm = prefs[KEY_HEIGHT_CM]?.toDoubleOrNull(),
+            birthYear = prefs[KEY_BIRTH_YEAR],
+            isFemale = prefs[KEY_IS_FEMALE]?.toBooleanStrictOrNull(),
+            trackLogEnabled = prefs[KEY_TRACK_LOG]?.toBooleanStrictOrNull() ?: false,
+            gpsAccuracyLimitM = prefs[KEY_GPS_ACC] ?: 35,
+            gpsSpeedFactor = prefs[KEY_GPS_FACTOR]?.toDoubleOrNull() ?: 2.0,
+            gpsSpeedFloorKmh = prefs[KEY_GPS_FLOOR] ?: 12,
+            motionGuardEnabled = prefs[KEY_MOTION_GUARD]?.toBooleanStrictOrNull() ?: true,
+            motionThreshold = prefs[KEY_MOTION_THRESHOLD]?.toDoubleOrNull() ?: 0.35,
+            countdownSeconds = prefs[KEY_COUNTDOWN] ?: 3,
+        )
+    }
+
+    suspend fun setCountdownSeconds(value: Int) {
+        context.settingsDataStore.edit { it[KEY_COUNTDOWN] = value.coerceIn(0, 15) }
+    }
+
+    suspend fun setMotionGuardEnabled(value: Boolean) {
+        context.settingsDataStore.edit { it[KEY_MOTION_GUARD] = value.toString() }
+    }
+
+    suspend fun setMotionThreshold(value: Double) {
+        context.settingsDataStore.edit {
+            it[KEY_MOTION_THRESHOLD] = (Math.round(value.coerceIn(0.1, 1.5) * 100) / 100.0).toString()
+        }
+    }
+
+    suspend fun setGpsAccuracyLimit(value: Int) {
+        context.settingsDataStore.edit { it[KEY_GPS_ACC] = value.coerceIn(10, 100) }
+    }
+
+    suspend fun setGpsSpeedFactor(value: Double) {
+        context.settingsDataStore.edit { it[KEY_GPS_FACTOR] = value.coerceIn(1.2, 5.0).toString() }
+    }
+
+    suspend fun setGpsSpeedFloor(value: Int) {
+        context.settingsDataStore.edit { it[KEY_GPS_FLOOR] = value.coerceIn(4, 40) }
+    }
+
+    suspend fun setTrackLogEnabled(value: Boolean) {
+        context.settingsDataStore.edit { it[KEY_TRACK_LOG] = value.toString() }
+    }
+
+    suspend fun setScale(address: String?, name: String?, driver: String?) {
+        context.settingsDataStore.edit { prefs ->
+            if (address == null) {
+                prefs.remove(KEY_SCALE_ADDRESS); prefs.remove(KEY_SCALE_NAME); prefs.remove(KEY_SCALE_DRIVER)
+            } else {
+                prefs[KEY_SCALE_ADDRESS] = address
+                prefs[KEY_SCALE_NAME] = name ?: ""
+                prefs[KEY_SCALE_DRIVER] = driver ?: ""
+            }
+        }
+    }
+
+    suspend fun setBodyData(heightCm: Double?, birthYear: Int?, isFemale: Boolean?) {
+        context.settingsDataStore.edit { prefs ->
+            heightCm?.let { prefs[KEY_HEIGHT_CM] = it.toString() } ?: prefs.remove(KEY_HEIGHT_CM)
+            birthYear?.let { prefs[KEY_BIRTH_YEAR] = it } ?: prefs.remove(KEY_BIRTH_YEAR)
+            isFemale?.let { prefs[KEY_IS_FEMALE] = it.toString() } ?: prefs.remove(KEY_IS_FEMALE)
+        }
+    }
+
+    suspend fun addCustomBarWeight(value: Double) {
+        val v = value.coerceIn(0.1, 100.0)
+        context.settingsDataStore.edit { prefs ->
+            val current = prefs[KEY_CUSTOM_BARS]?.split(",")
+                ?.mapNotNull { it.toDoubleOrNull() } ?: listOf(15.0)
+            prefs[KEY_CUSTOM_BARS] = (current + v).distinct().sorted().joinToString(",")
+        }
+    }
+
+    suspend fun removeCustomBarWeight(value: Double) {
+        context.settingsDataStore.edit { prefs ->
+            val current = prefs[KEY_CUSTOM_BARS]?.split(",")
+                ?.mapNotNull { it.toDoubleOrNull() } ?: listOf(15.0)
+            prefs[KEY_CUSTOM_BARS] = current.filter { it != value }.joinToString(",")
+        }
+    }
+
+    suspend fun setWeightStep(value: Double) {
+        context.settingsDataStore.edit { it[KEY_WEIGHT_STEP] = value.toString() }
+    }
+
+    suspend fun setAutoRelogin(value: Boolean) {
+        context.settingsDataStore.edit { it[KEY_AUTO_RELOGIN] = value.toString() }
+    }
+
+    suspend fun setRestTimerStyle(value: RestTimerStyle) {
+        context.settingsDataStore.edit { it[KEY_TIMER_STYLE] = value.name }
+    }
+
+    suspend fun setRestAlert(value: RestAlert) {
+        context.settingsDataStore.edit { it[KEY_REST_ALERT] = value.name }
+    }
+
+    suspend fun setDefaultRestSeconds(value: Int) {
+        context.settingsDataStore.edit { it[KEY_REST_SECONDS] = value.coerceIn(10, 600) }
+    }
+
+    companion object {
+        private val KEY_TIMER_STYLE = stringPreferencesKey("rest_timer_style")
+        private val KEY_REST_ALERT = stringPreferencesKey("rest_alert")
+        private val KEY_REST_SECONDS = intPreferencesKey("default_rest_seconds")
+        private val KEY_WEIGHT_STEP = stringPreferencesKey("weight_step")
+        private val KEY_AUTO_RELOGIN = stringPreferencesKey("auto_relogin")
+        private val KEY_CUSTOM_BAR = stringPreferencesKey("custom_bar_weight")
+        private val KEY_CUSTOM_BARS = stringPreferencesKey("custom_bar_weights")
+        private val KEY_SCALE_ADDRESS = stringPreferencesKey("scale_address")
+        private val KEY_SCALE_NAME = stringPreferencesKey("scale_name")
+        private val KEY_SCALE_DRIVER = stringPreferencesKey("scale_driver")
+        private val KEY_HEIGHT_CM = stringPreferencesKey("height_cm")
+        private val KEY_BIRTH_YEAR = intPreferencesKey("birth_year")
+        private val KEY_IS_FEMALE = stringPreferencesKey("is_female")
+        private val KEY_TRACK_LOG = stringPreferencesKey("track_log_enabled")
+        private val KEY_GPS_ACC = intPreferencesKey("gps_accuracy_limit_m")
+        private val KEY_GPS_FACTOR = stringPreferencesKey("gps_speed_factor")
+        private val KEY_GPS_FLOOR = intPreferencesKey("gps_speed_floor_kmh")
+        private val KEY_MOTION_GUARD = stringPreferencesKey("motion_guard_enabled")
+        private val KEY_MOTION_THRESHOLD = stringPreferencesKey("motion_threshold")
+        private val KEY_COUNTDOWN = intPreferencesKey("countdown_seconds")
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/data/StepsSync.kt

@@ -0,0 +1,80 @@
+package eu.brassepc.fitnessdroid.data
+
+import android.content.Context
+import androidx.health.connect.client.HealthConnectClient
+import androidx.health.connect.client.permission.HealthPermission
+import androidx.health.connect.client.records.StepsRecord
+import androidx.health.connect.client.request.AggregateRequest
+import androidx.health.connect.client.time.TimeRangeFilter
+import java.time.Instant
+import java.time.LocalDate
+import java.time.ZoneId
+
+/**
+ * Steg via Health Connect: läser dagens + gårdagens stegsumma (som andra
+ * appar/telefonen loggat) och synkar upp till gym-API:t (upsertDailySteps).
+ * Servern räknar sedan in stegen i kcal-mätarens telefondel och stegmålen.
+ */
+class StepsSync(
+    private val context: Context,
+    private val gymApi: GymApi,
+) {
+    val stepsPermission: String = HealthPermission.getReadPermission(StepsRecord::class)
+
+    private var lastSyncMs = 0L
+
+    /** SDK_UNAVAILABLE / SDK_UNAVAILABLE_PROVIDER_UPDATE_REQUIRED / SDK_AVAILABLE */
+    fun sdkStatus(): Int = HealthConnectClient.getSdkStatus(context)
+
+    fun isAvailable(): Boolean = sdkStatus() == HealthConnectClient.SDK_AVAILABLE
+
+    suspend fun hasPermission(): Boolean {
+        if (!isAvailable()) return false
+        return runCatching {
+            HealthConnectClient.getOrCreate(context)
+                .permissionController.getGrantedPermissions()
+                .contains(stepsPermission)
+        }.getOrDefault(false)
+    }
+
+    /**
+     * Läs och synka. Returnerar dagens steg, eller null om HC saknas /
+     * behörighet inte getts. Fel sväljs (nästa synk försöker igen).
+     */
+    suspend fun syncNow(): Int? {
+        if (!hasPermission()) return null
+        val client = HealthConnectClient.getOrCreate(context)
+        val zone = ZoneId.systemDefault()
+        val today = LocalDate.now()
+        var todaySteps: Int? = null
+
+        for (day in listOf(today.minusDays(1), today)) {
+            val startInstant = day.atStartOfDay(zone).toInstant()
+            val endInstant = if (day == today) Instant.now()
+            else day.plusDays(1).atStartOfDay(zone).toInstant()
+
+            val steps = runCatching {
+                val result = client.aggregate(
+                    AggregateRequest(
+                        metrics = setOf(StepsRecord.COUNT_TOTAL),
+                        timeRangeFilter = TimeRangeFilter.between(startInstant, endInstant),
+                    )
+                )
+                (result[StepsRecord.COUNT_TOTAL] ?: 0L).toInt()
+            }.getOrNull() ?: continue
+
+            if (day == today) todaySteps = steps
+            runCatching {
+                gymApi.upsertDailySteps(startInstant.toString(), steps)
+            }
+        }
+        lastSyncMs = System.currentTimeMillis()
+        return todaySteps
+    }
+
+    /** Synka högst var 10:e minut — anropas t.ex. när hemskärmen visas. */
+    suspend fun syncThrottled() {
+        if (System.currentTimeMillis() - lastSyncMs < 10 * 60_000) return
+        syncNow()
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/data/SyncEngine.kt

@@ -0,0 +1,237 @@
+package eu.brassepc.fitnessdroid.data
+
+import eu.brassepc.fitnessdroid.data.local.AppDatabase
+import eu.brassepc.fitnessdroid.data.local.PendingOp
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
+import kotlinx.serialization.json.buildJsonObject
+import kotlinx.serialization.json.int
+import kotlinx.serialization.json.jsonObject
+import kotlinx.serialization.json.jsonPrimitive
+import kotlinx.serialization.json.put
+import java.io.IOException
+
+object OpKind {
+    const val START_SESSION = "start_session"
+    const val ADD_EXERCISE = "add_exercise"
+    const val ADD_SET = "add_set"
+    const val UPDATE_SET = "update_set"
+    /** targetLocalId bär server-id:t — den lokala raden är redan borta */
+    const val REMOVE_SET = "remove_set"
+    const val COMPLETE_SESSION = "complete_session"
+    /** targetLocalId pekar på pending_activity-raden */
+    const val ADD_ACTIVITY = "add_activity"
+}
+
+enum class SyncStatus { SYNCED, PENDING, OFFLINE, ERROR }
+
+/**
+ * Kör op-kön mot servern i strikt ordning (FIFO). Varje op pekar på en lokal
+ * rad; server-id:n som kommer tillbaka skrivs in på raden så att efterföljande
+ * ops kan referera dem. Nätfel → backoff och nytt försök; kön ligger kvar i
+ * Room så inget tappas om appen dödas.
+ */
+class SyncEngine(
+    private val db: AppDatabase,
+    private val client: GraphQlClient,
+    private val auth: AuthRepository,
+    private val scope: CoroutineScope,
+) {
+    private val mutex = Mutex()
+    private val _status = MutableStateFlow(SyncStatus.SYNCED)
+    val status: StateFlow<SyncStatus> = _status
+    val pendingCount = db.opDao().pendingCount()
+
+    /** Puffa igång kön; ofarlig att kalla ofta. */
+    fun kick() {
+        scope.launch { drain() }
+    }
+
+    suspend fun drain() {
+        mutex.withLock {
+            while (true) {
+                val op = db.opDao().next() ?: break
+                try {
+                    execute(op)
+                    db.opDao().done(op.id)
+                    _status.value = if (db.opDao().pendingCountNow() == 0) {
+                        SyncStatus.SYNCED
+                    } else {
+                        SyncStatus.PENDING
+                    }
+                } catch (e: IOException) {
+                    // Inget nät — försök igen senare, rör inte kön.
+                    _status.value = SyncStatus.OFFLINE
+                    scheduleRetry(op)
+                    return
+                } catch (e: GraphQlException) {
+                    // Servern sa nej. Behåll op:en för felsökning men fortsätt inte —
+                    // efterföljande ops kan bero på den här.
+                    db.opDao().update(
+                        op.copy(attempts = op.attempts + 1, lastError = e.message)
+                    )
+                    _status.value = SyncStatus.ERROR
+                    scheduleRetry(op, longDelay = true)
+                    return
+                }
+            }
+        }
+    }
+
+    private var retryScheduled = false
+    private fun scheduleRetry(op: PendingOp, longDelay: Boolean = false) {
+        if (retryScheduled) return
+        retryScheduled = true
+        scope.launch {
+            val backoff = if (longDelay) 30_000L else 5_000L
+            delay(backoff * (op.attempts + 1).coerceAtMost(6))
+            retryScheduled = false
+            drain()
+        }
+    }
+
+    private suspend fun execute(op: PendingOp) {
+        val dao = db.sessionDao()
+        when (op.kind) {
+            OpKind.START_SESSION -> {
+                val session = dao.session(op.targetLocalId) ?: return
+                if (session.serverId != null) return
+                val input = buildJsonObject {
+                    session.name?.let { put("name", it) }
+                    session.notes?.let { put("notes", it) }
+                }
+                val data = client.execute(
+                    "mutation(\$input: StartGymSessionInput!){startGymSession(input:\$input){id}}",
+                    buildJsonObject { put("input", input) },
+                    auth.bearerToken(),
+                )
+                val id = data["startGymSession"]!!.jsonObject["id"]!!.jsonPrimitive.int
+                dao.updateSession(session.copy(serverId = id))
+            }
+
+            OpKind.ADD_EXERCISE -> {
+                val exercise = dao.exercise(op.targetLocalId) ?: return
+                if (exercise.serverId != null) return
+                val session = dao.session(exercise.sessionId) ?: return
+                val sessionServerId = session.serverId
+                    ?: throw GraphQlException(listOf("Passet är inte synkat än"))
+                val input = buildJsonObject {
+                    put("gymSessionId", sessionServerId)
+                    put("exerciseTypeId", exercise.exerciseTypeId)
+                    put("order", exercise.order)
+                    exercise.notes?.let { put("notes", it) }
+                }
+                val data = client.execute(
+                    "mutation(\$input: AddSessionExerciseInput!){addExerciseToSession(input:\$input){id}}",
+                    buildJsonObject { put("input", input) },
+                    auth.bearerToken(),
+                )
+                val id = data["addExerciseToSession"]!!.jsonObject["id"]!!.jsonPrimitive.int
+                dao.updateExercise(exercise.copy(serverId = id))
+            }
+
+            OpKind.ADD_SET, OpKind.UPDATE_SET -> {
+                val set = dao.set(op.targetLocalId) ?: return
+                if (op.kind == OpKind.ADD_SET && set.serverId != null) return
+                val exercise = dao.exercise(set.exerciseId) ?: return
+                val exerciseServerId = exercise.serverId
+                    ?: throw GraphQlException(listOf("Övningen är inte synkad än"))
+                val fields = buildJsonObject {
+                    if (op.kind == OpKind.ADD_SET) {
+                        put("sessionExerciseId", exerciseServerId)
+                    } else {
+                        put("id", set.serverId ?: throw GraphQlException(listOf("Setet är inte synkat än")))
+                    }
+                    set.reps?.let { put("reps", it) }
+                    set.weight?.let { put("weight", it) }
+                    set.distanceMeters?.let { put("distanceMeters", it) }
+                    set.durationSeconds?.let { put("durationSeconds", it) }
+                    set.rpe?.let { put("rpe", it) }
+                    put("isWarmup", set.isWarmup)
+                    put("isCompleted", set.isCompleted)
+                    put("order", set.order)
+                }
+                if (op.kind == OpKind.ADD_SET) {
+                    val data = client.execute(
+                        "mutation(\$input: AddSessionSetInput!){addSessionSet(input:\$input){id}}",
+                        buildJsonObject { put("input", fields) },
+                        auth.bearerToken(),
+                    )
+                    val id = data["addSessionSet"]!!.jsonObject["id"]!!.jsonPrimitive.int
+                    dao.updateSet(set.copy(serverId = id))
+                } else {
+                    client.execute(
+                        "mutation(\$input: UpdateSessionSetInput!){updateSessionSet(input:\$input){id}}",
+                        buildJsonObject { put("input", fields) },
+                        auth.bearerToken(),
+                    )
+                }
+            }
+
+            OpKind.REMOVE_SET -> {
+                client.execute(
+                    "mutation(\$id: Int!){removeSessionSet(id:\$id)}",
+                    buildJsonObject { put("id", op.targetLocalId.toInt()) },
+                    auth.bearerToken(),
+                )
+            }
+
+            OpKind.ADD_ACTIVITY -> {
+                val a = db.opDao().pendingActivity(op.targetLocalId) ?: return
+                client.execute(
+                    "mutation(\$input: AddActivityInput!){addActivity(input:\$input){id}}",
+                    buildJsonObject {
+                        put("input", buildJsonObject {
+                            put("activityTypeId", a.activityTypeId)
+                            put("startedAt", a.startedAtIso)
+                            put("durationSeconds", a.durationSeconds)
+                            a.distanceMeters?.let { put("distanceMeters", it) }
+                            a.elevationGainMeters?.let { put("elevationGainMeters", it) }
+                            a.rpe?.let { put("rpe", it) }
+                            put("source", a.source)
+                            a.routePolyline?.let { put("routePolyline", it) }
+                            a.notes?.let { put("notes", it) }
+                        })
+                    },
+                    auth.bearerToken(),
+                )
+                db.opDao().activityDone(op.targetLocalId)
+            }
+
+            OpKind.COMPLETE_SESSION -> {
+                val session = dao.session(op.targetLocalId) ?: return
+                val sessionServerId = session.serverId
+                    ?: throw GraphQlException(listOf("Passet är inte synkat än"))
+                // Rättad starttid: flytta passets datum innan det avslutas.
+                session.editedStartEpochMs?.let { startMs ->
+                    val iso = java.time.Instant.ofEpochMilli(startMs).toString()
+                    client.execute(
+                        "mutation(\$input: UpdateGymSessionInput!){updateGymSession(input:\$input){id date}}",
+                        buildJsonObject {
+                            put("input", buildJsonObject {
+                                put("id", sessionServerId)
+                                put("date", iso)
+                            })
+                        },
+                        auth.bearerToken(),
+                    )
+                }
+                val input = buildJsonObject {
+                    put("id", sessionServerId)
+                    session.name?.let { put("name", it) }
+                    session.durationSecondsOverride?.let { put("durationSecondsOverride", it) }
+                }
+                client.execute(
+                    "mutation(\$input: CompleteGymSessionInput!){completeGymSession(input:\$input){id status}}",
+                    buildJsonObject { put("input", input) },
+                    auth.bearerToken(),
+                )
+            }
+        }
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/data/TokenStore.kt

@@ -1,6 +1,7 @@
 package eu.brassepc.fitnessdroid.data
 
 import android.content.Context
+import androidx.datastore.preferences.core.doublePreferencesKey
 import androidx.datastore.preferences.core.edit
 import androidx.datastore.preferences.core.longPreferencesKey
 import androidx.datastore.preferences.core.stringPreferencesKey
@@ -63,6 +64,25 @@ class TokenStore(private val context: Context) {
         }
     }
 
+    /** Kroppsvikten cachas från profilen — behövs för kaloriuppskattningen offline. */
+    suspend fun saveBodyWeight(kg: Double?) {
+        context.authDataStore.edit {
+            if (kg == null) it.remove(KEY_BODY_WEIGHT) else it[KEY_BODY_WEIGHT] = kg
+        }
+    }
+
+    suspend fun bodyWeightKg(): Double? =
+        context.authDataStore.data.first()[KEY_BODY_WEIGHT]
+
+    suspend fun saveDisplayName(name: String?) {
+        context.authDataStore.edit {
+            if (name.isNullOrBlank()) it.remove(KEY_DISPLAY_NAME) else it[KEY_DISPLAY_NAME] = name
+        }
+    }
+
+    suspend fun displayName(): String? =
+        context.authDataStore.data.first()[KEY_DISPLAY_NAME]
+
     /** Rensar sessionen men behåller vald API-url. */
     suspend fun clearSession() {
         context.authDataStore.edit {
@@ -83,5 +103,7 @@ class TokenStore(private val context: Context) {
         private val KEY_REFRESH_TOKEN = stringPreferencesKey("refresh_token")
         private val KEY_EXPIRATION = longPreferencesKey("expiration_epoch_ms")
         private val KEY_API_URL = stringPreferencesKey("api_url")
+        private val KEY_BODY_WEIGHT = doublePreferencesKey("body_weight_kg")
+        private val KEY_DISPLAY_NAME = stringPreferencesKey("display_name")
     }
 }

app/src/main/java/eu/brassepc/fitnessdroid/data/TrackLog.kt

@@ -0,0 +1,32 @@
+package eu.brassepc.fitnessdroid.data
+
+import android.util.Log
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import java.time.LocalTime
+import java.time.format.DateTimeFormatter
+
+/**
+ * Teknisk logg för aktivitetsspårningen — ringbuffert som visas i UI:t
+ * ("Teknisk logg" på spårskärmen) och kan delas, så fältfel går att felsöka
+ * utan adb. Speglas till logcat (tag TrackLog).
+ */
+object TrackLog {
+    private const val MAX_LINES = 400
+    private val fmt = DateTimeFormatter.ofPattern("HH:mm:ss")
+
+    private val _lines = MutableStateFlow<List<String>>(emptyList())
+    val lines: StateFlow<List<String>> = _lines
+
+    fun log(msg: String) {
+        val line = "${LocalTime.now().format(fmt)} $msg"
+        Log.d("TrackLog", msg)
+        _lines.value = (_lines.value + line).takeLast(MAX_LINES)
+    }
+
+    fun clear() {
+        _lines.value = emptyList()
+    }
+
+    fun asText(): String = _lines.value.joinToString("\n")
+}

app/src/main/java/eu/brassepc/fitnessdroid/data/TrackingService.kt

@@ -0,0 +1,642 @@
+package eu.brassepc.fitnessdroid.data
+
+import android.Manifest
+import android.app.Notification
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.app.PendingIntent
+import android.app.Service
+import android.content.Context
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.content.pm.ServiceInfo
+import android.hardware.Sensor
+import android.hardware.SensorEvent
+import android.hardware.SensorEventListener
+import android.hardware.SensorManager
+import android.location.Location
+import android.location.LocationListener
+import android.location.LocationManager
+import android.os.Looper
+import android.os.SystemClock
+import androidx.core.app.NotificationCompat
+import androidx.core.content.ContextCompat
+import eu.brassepc.fitnessdroid.MainActivity
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.cancel
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+
+/**
+ * Spårningens faser: startar i READY (pausad — GPS värmer upp), play startar
+ * en nedräkning (inställbar) och sen ACTIVE. Kan pausas/återupptas.
+ */
+enum class TrackingPhase { IDLE, READY, COUNTDOWN, ACTIVE, PAUSED }
+
+/** Läget för en pågående (eller nyss avslutad) aktivitetsspårning. */
+data class TrackingState(
+    val isActive: Boolean = false,
+    val phase: TrackingPhase = TrackingPhase.IDLE,
+    /** Sekunder kvar av nedräkningen (fas COUNTDOWN) */
+    val countdownLeft: Int = 0,
+    /** Aktivitetstypen som spåras */
+    val typeId: Int = 0,
+    val typeKey: String = "",
+    val typeName: String = "",
+    val category: String = "OTHER",
+    val met: Double = 4.0,
+    val isDistanceBased: Boolean = false,
+    val startedAtEpochMs: Long = 0,
+    val elapsedSeconds: Int = 0,
+    val distanceMeters: Double = 0.0,
+    val elevationGainMeters: Double = 0.0,
+    /** Steg räknade av telefonens sensor under aktiv tid (null = sensor saknas/nekad) */
+    val steps: Int? = null,
+    /** Committade spårpunkter (spikfiltrerade) */
+    val points: List<Pair<Double, Double>> = emptyList(),
+    /** Senast kända position oavsett kvalitet — för kartcentrering/markör */
+    val currentPosition: Pair<Double, Double>? = null,
+    val currentSpeedKmh: Double? = null,
+    val kcal: Double? = null,
+    val gpsFix: Boolean = false,
+    /** false = accelerometern säger stilla → spår/distans fryst */
+    val isMoving: Boolean = true,
+)
+
+/**
+ * Foreground-service som spårar en aktivitet: GPS-rutt, distans, höjdmeter,
+ * steg, tid och live-kcal. Positionspipeline: fartgrind (Doppler) →
+ * rörelsevakt (accelerometer) → lag-buffrat spikfilter (en punkt committas
+ * först när nästa setts; "ut-och-tillbaka"-hopp slängs) → stillastående-filter.
+ */
+class TrackingService : Service(), LocationListener, SensorEventListener {
+
+    private val scope = CoroutineScope(SupervisorJob() + Dispatchers.Default)
+    private var locationManager: LocationManager? = null
+    private var sensorManager: SensorManager? = null
+
+    private var weightKg: Double? = null
+    // GPS-filter (justerbara i inställningarna)
+    private var accuracyLimitM = 35f
+    private var speedFactor = 2.0
+    private var speedFloorMs = 12.0 / 3.6
+    private var motionGuard = true
+    private var motionThreshold = 0.35
+    private var countdownSeconds = 3
+
+    // Tidräkning: ackumulerad aktiv tid + när nuvarande aktiva stint började
+    private var accumulatedActiveMs = 0L
+    private var activeSinceElapsed = 0L
+
+    // Positionspipeline
+    private var lastCommitted: Location? = null
+    private var candidate: Location? = null
+    private var dopplerEmaMs = 0.0
+    private var rejectStreak = 0
+
+    // Höjd (glidande medel mot GPS-brus)
+    private val altitudeWindow = ArrayDeque<Double>()
+    private var smoothedAltitude: Double? = null
+
+    // Rörelsevakt
+    private val motionWindow = ArrayDeque<Double>()
+    private var isMoving = true
+
+    // Steg (TYPE_STEP_COUNTER är kumulativ sedan boot)
+    private var stepSensorAvailable = false
+    private var stepCounterLast: Long = -1
+    private var stepsDuringActivity = 0L
+
+    override fun onCreate() {
+        super.onCreate()
+        createChannel()
+    }
+
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        when (intent?.action) {
+            ACTION_STOP -> {
+                stopTracking()
+                return START_NOT_STICKY
+            }
+            ACTION_PLAY -> {
+                play()
+                return START_STICKY
+            }
+            ACTION_PAUSE -> {
+                pause()
+                return START_STICKY
+            }
+            else -> {
+                if (intent == null) return START_NOT_STICKY
+                startTracking(intent)
+            }
+        }
+        return START_STICKY
+    }
+
+    private fun startTracking(intent: Intent) {
+        val distanceBased = intent.getBooleanExtra(EXTRA_DISTANCE_BASED, false)
+        weightKg = intent.getDoubleExtra(EXTRA_WEIGHT_KG, -1.0).takeIf { it > 0 }
+        accuracyLimitM = intent.getIntExtra(EXTRA_GPS_ACC_LIMIT, 35).toFloat()
+        speedFactor = intent.getDoubleExtra(EXTRA_GPS_SPEED_FACTOR, 2.0)
+        speedFloorMs = intent.getIntExtra(EXTRA_GPS_SPEED_FLOOR, 12) / 3.6
+        motionGuard = intent.getBooleanExtra(EXTRA_MOTION_GUARD, true)
+        motionThreshold = intent.getDoubleExtra(EXTRA_MOTION_THRESHOLD, 0.35)
+        countdownSeconds = intent.getIntExtra(EXTRA_COUNTDOWN, 3)
+
+        accumulatedActiveMs = 0L
+        activeSinceElapsed = 0L
+        lastCommitted = null
+        candidate = null
+        dopplerEmaMs = 0.0
+        rejectStreak = 0
+        altitudeWindow.clear()
+        smoothedAltitude = null
+        motionWindow.clear()
+        isMoving = true
+        stepCounterLast = -1
+        stepsDuringActivity = 0
+
+        _state.value = TrackingState(
+            isActive = true,
+            phase = TrackingPhase.READY,
+            typeId = intent.getIntExtra(EXTRA_TYPE_ID, 0),
+            typeKey = intent.getStringExtra(EXTRA_TYPE_KEY) ?: "",
+            typeName = intent.getStringExtra(EXTRA_TYPE_NAME) ?: "Aktivitet",
+            category = intent.getStringExtra(EXTRA_CATEGORY) ?: "OTHER",
+            met = intent.getDoubleExtra(EXTRA_MET, 4.0),
+            isDistanceBased = distanceBased,
+            startedAtEpochMs = System.currentTimeMillis(),
+        )
+        TrackLog.clear()
+        TrackLog.log("start: ${_state.value.typeName} (distans=$distanceBased, vikt=${weightKg ?: "?"} kg) — READY, tryck play")
+        if (distanceBased) {
+            TrackLog.log(
+                "filter: acc≤${accuracyLimitM.toInt()} m, fartgrind ${speedFactor}× Doppler " +
+                    "(golv ${"%.0f".format(speedFloorMs * 3.6)} km/h), spikfilter på, nedräkning ${countdownSeconds}s"
+            )
+        }
+
+        startForeground(
+            NOTIFICATION_ID, buildNotification(),
+            ServiceInfo.FOREGROUND_SERVICE_TYPE_LOCATION,
+        )
+
+        if (distanceBased) {
+            startGps()
+            startSensors()
+        }
+
+        // Tick: nedräkning, aktiv tid, kcal, notis
+        scope.launch {
+            while (_state.value.isActive) {
+                val s = _state.value
+                when (s.phase) {
+                    TrackingPhase.COUNTDOWN -> {
+                        val left = s.countdownLeft - 1
+                        if (left <= 0) {
+                            goActive()
+                        } else {
+                            _state.value = _state.value.copy(countdownLeft = left)
+                        }
+                    }
+                    TrackingPhase.ACTIVE -> {
+                        val elapsed = currentElapsedSeconds()
+                        _state.value = _state.value.copy(
+                            elapsedSeconds = elapsed,
+                            steps = if (stepSensorAvailable) stepsDuringActivity.toInt() else _state.value.steps,
+                            kcal = ActivityKcal.estimate(
+                                met = s.met,
+                                category = s.category,
+                                isDistanceBased = s.isDistanceBased,
+                                weightKg = weightKg,
+                                durationSeconds = elapsed,
+                                distanceMeters = s.distanceMeters.takeIf { it > 0 },
+                                elevationGainMeters = s.elevationGainMeters.takeIf { it > 0 },
+                                rpe = null,
+                            ),
+                        )
+                        if (elapsed % 10 == 0) {
+                            getSystemService(NotificationManager::class.java)
+                                .notify(NOTIFICATION_ID, buildNotification())
+                        }
+                    }
+                    else -> Unit
+                }
+                delay(1000)
+            }
+        }
+    }
+
+    private fun currentElapsedSeconds(): Int {
+        val extra = if (_state.value.phase == TrackingPhase.ACTIVE && activeSinceElapsed > 0) {
+            SystemClock.elapsedRealtime() - activeSinceElapsed
+        } else 0L
+        return ((accumulatedActiveMs + extra) / 1000).toInt()
+    }
+
+    private fun play() {
+        val s = _state.value
+        if (!s.isActive || s.phase == TrackingPhase.ACTIVE || s.phase == TrackingPhase.COUNTDOWN) return
+        if (countdownSeconds > 0) {
+            TrackLog.log("play → nedräkning ${countdownSeconds}s")
+            _state.value = s.copy(phase = TrackingPhase.COUNTDOWN, countdownLeft = countdownSeconds)
+        } else {
+            goActive()
+        }
+    }
+
+    private fun goActive() {
+        activeSinceElapsed = SystemClock.elapsedRealtime()
+        stepCounterLast = -1 // ny baslinje vid nästa sensoravläsning
+        TrackLog.log("AKTIV — klockan går")
+        _state.value = _state.value.copy(
+            phase = TrackingPhase.ACTIVE,
+            countdownLeft = 0,
+            startedAtEpochMs = if (accumulatedActiveMs == 0L) System.currentTimeMillis()
+            else _state.value.startedAtEpochMs,
+        )
+        getSystemService(NotificationManager::class.java).notify(NOTIFICATION_ID, buildNotification())
+    }
+
+    private fun pause() {
+        val s = _state.value
+        if (!s.isActive || s.phase != TrackingPhase.ACTIVE) return
+        accumulatedActiveMs += SystemClock.elapsedRealtime() - activeSinceElapsed
+        activeSinceElapsed = 0L
+        // Positionskedjan bryts så pausvandring inte räknas vid återupptag
+        lastCommitted = null
+        candidate = null
+        TrackLog.log("pausad vid ${currentElapsedSeconds()}s, ${"%.0f".format(s.distanceMeters)} m")
+        _state.value = s.copy(phase = TrackingPhase.PAUSED, elapsedSeconds = (accumulatedActiveMs / 1000).toInt())
+        getSystemService(NotificationManager::class.java).notify(NOTIFICATION_ID, buildNotification())
+    }
+
+    /* ---------- GPS ---------- */
+
+    private fun startGps() {
+        if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
+            != PackageManager.PERMISSION_GRANTED
+        ) {
+            TrackLog.log("FEL: platsbehörighet saknas — ingen GPS-lyssning")
+            return
+        }
+        val lm = getSystemService(Context.LOCATION_SERVICE) as LocationManager
+        locationManager = lm
+
+        val providers = listOf(
+            LocationManager.GPS_PROVIDER,
+            LocationManager.FUSED_PROVIDER,
+            LocationManager.NETWORK_PROVIDER,
+        )
+        for (provider in providers) {
+            val exists = runCatching { lm.allProviders.contains(provider) }.getOrDefault(false)
+            val enabled = exists && runCatching { lm.isProviderEnabled(provider) }.getOrDefault(false)
+            TrackLog.log("provider $provider: ${if (!exists) "saknas" else if (enabled) "på" else "AVSTÄNGD"}")
+            if (!enabled) continue
+            runCatching {
+                // 1 s / 0 m — tät sampling ger spikfiltret mer att jobba med
+                lm.requestLocationUpdates(provider, 1000L, 0f, this, Looper.getMainLooper())
+                TrackLog.log("lyssnar på $provider (1 s)")
+            }.onFailure { TrackLog.log("FEL: kunde inte lyssna på $provider: ${it.message}") }
+        }
+
+        providers.firstNotNullOfOrNull { p ->
+            runCatching { lm.getLastKnownLocation(p) }.getOrNull()
+        }?.let { last ->
+            TrackLog.log("lastKnown: ${last.provider} acc=${if (last.hasAccuracy()) "%.0f".format(last.accuracy) else "?"} m")
+            _state.value = _state.value.copy(currentPosition = last.latitude to last.longitude)
+        }
+    }
+
+    override fun onLocationChanged(location: Location) {
+        val s = _state.value
+        if (!s.isActive || !s.isDistanceBased) return
+        val acc = if (location.hasAccuracy()) location.accuracy else -1f
+
+        // Position för kartan uppdateras alltid, oavsett kvalitet och fas
+        _state.value = _state.value.copy(
+            currentPosition = location.latitude to location.longitude,
+            gpsFix = true,
+            currentSpeedKmh = if (location.hasSpeed()) location.speed * 3.6 else _state.value.currentSpeedKmh,
+        )
+
+        // Ackumulering sker bara i ACTIVE
+        if (s.phase != TrackingPhase.ACTIVE) return
+
+        // Grind 1: noggrannhet
+        if (location.hasAccuracy() && location.accuracy > accuracyLimitM) {
+            TrackLog.log("${location.provider}: förkastad, acc=${"%.0f".format(acc)} m (>${accuracyLimitM.toInt()})")
+            return
+        }
+
+        // Doppler-fart (glidande medel)
+        if (location.hasSpeed()) {
+            dopplerEmaMs = if (dopplerEmaMs == 0.0) location.speed.toDouble()
+            else 0.7 * dopplerEmaMs + 0.3 * location.speed
+        }
+
+        // Grind 2: fartgrinden mot senast committade punkt
+        lastCommitted?.let { prev ->
+            val dtSec = (location.elapsedRealtimeNanos - prev.elapsedRealtimeNanos) / 1e9
+            if (dtSec > 0.3) {
+                val jump = prev.distanceTo(location).toDouble()
+                val impliedMs = jump / dtSec
+                val allowedMs = maxOf(speedFloorMs, dopplerEmaMs * speedFactor)
+                if (impliedMs > allowedMs) {
+                    rejectStreak++
+                    TrackLog.log(
+                        "${location.provider}: fartgrind — ${"%.0f".format(jump)} m/${"%.1f".format(dtSec)} s " +
+                            "= ${"%.0f".format(impliedMs * 3.6)} km/h (max ${"%.0f".format(allowedMs * 3.6)}), förkastad ($rejectStreak)"
+                    )
+                    if (rejectStreak >= 4) {
+                        TrackLog.log("fartgrind: ny baslinje efter $rejectStreak förkastade")
+                        lastCommitted = location
+                        candidate = null
+                        rejectStreak = 0
+                    }
+                    return
+                }
+            }
+        }
+        rejectStreak = 0
+
+        // Grind 3: rörelsevakten — stilla ⇒ frys allt utom kartposition
+        if (motionGuard && !isMoving) {
+            lastCommitted = location
+            candidate = null
+            return
+        }
+
+        // Grind 4: lag-buffrat spikfilter — committa kandidaten först när vi
+        // sett nästa punkt; "ut-och-direkt-tillbaka" slängs (triangel-kollaps).
+        val prev = lastCommitted
+        val cand = candidate
+        if (prev == null) {
+            lastCommitted = location
+            commitPoint(location, addDistance = 0.0)
+            return
+        }
+        if (cand == null) {
+            candidate = location
+            return
+        }
+
+        val d1 = prev.distanceTo(cand).toDouble()
+        val d2 = cand.distanceTo(location).toDouble()
+        val d02 = prev.distanceTo(location).toDouble()
+        val isSpike = d1 > 4.0 && (d1 + d2) > 0 && d02 < 0.6 * (d1 + d2)
+        if (isSpike) {
+            TrackLog.log("spikfilter: slängde punkt (ut ${"%.0f".format(d1)} m, tillbaka ${"%.0f".format(d2)} m, direkt ${"%.0f".format(d02)} m)")
+            candidate = location
+            return
+        }
+
+        // Kandidaten är trovärdig — committa den
+        val minMove = maxOf(2.0, (if (cand.hasAccuracy()) cand.accuracy else 5f) * 0.5)
+        commitPoint(cand, addDistance = if (d1 >= minMove) d1 else 0.0)
+        lastCommitted = cand
+        candidate = location
+    }
+
+    private fun commitPoint(location: Location, addDistance: Double) {
+        var elevGain = _state.value.elevationGainMeters
+        if (location.hasAltitude()) {
+            altitudeWindow.addLast(location.altitude)
+            if (altitudeWindow.size > 5) altitudeWindow.removeFirst()
+            val avg = altitudeWindow.average()
+            smoothedAltitude?.let { prevAlt ->
+                val delta = avg - prevAlt
+                if (delta > 1.0) elevGain += delta
+            }
+            smoothedAltitude = avg
+        }
+
+        val cur = _state.value
+        _state.value = cur.copy(
+            distanceMeters = cur.distanceMeters + addDistance,
+            elevationGainMeters = elevGain,
+            points = if (addDistance > 0 || cur.points.isEmpty()) {
+                cur.points + (location.latitude to location.longitude)
+            } else cur.points,
+        )
+    }
+
+    /* ---------- Sensorer (rörelsevakt + steg) ---------- */
+
+    private fun startSensors() {
+        val sm = getSystemService(Context.SENSOR_SERVICE) as SensorManager
+        sensorManager = sm
+        if (motionGuard) {
+            val accel = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER)
+            if (accel != null) {
+                sm.registerListener(this, accel, SensorManager.SENSOR_DELAY_UI)
+                TrackLog.log("rörelsevakt: på (tröskel $motionThreshold m/s²)")
+            } else {
+                TrackLog.log("rörelsevakt: ingen accelerometer — avstängd")
+                motionGuard = false
+            }
+        }
+        // Stegsensorn kräver ACTIVITY_RECOGNITION-behörighet (Android 10+)
+        val hasActivityPermission = ContextCompat.checkSelfPermission(
+            this, Manifest.permission.ACTIVITY_RECOGNITION,
+        ) == PackageManager.PERMISSION_GRANTED
+        val stepSensor = sm.getDefaultSensor(Sensor.TYPE_STEP_COUNTER)
+        if (stepSensor != null && hasActivityPermission) {
+            stepSensorAvailable = true
+            sm.registerListener(this, stepSensor, SensorManager.SENSOR_DELAY_UI)
+            TrackLog.log("stegsensor: på")
+        } else {
+            stepSensorAvailable = false
+            TrackLog.log("stegsensor: ${if (stepSensor == null) "saknas" else "behörighet saknas"}")
+        }
+    }
+
+    override fun onSensorChanged(event: SensorEvent) {
+        when (event.sensor.type) {
+            Sensor.TYPE_ACCELEROMETER -> {
+                val x = event.values[0].toDouble()
+                val y = event.values[1].toDouble()
+                val z = event.values[2].toDouble()
+                val deviation = kotlin.math.abs(kotlin.math.sqrt(x * x + y * y + z * z) - 9.81)
+                motionWindow.addLast(deviation)
+                if (motionWindow.size > 20) motionWindow.removeFirst()
+                if (motionWindow.size < 8) return
+                val moving = motionWindow.average() > motionThreshold
+                if (moving != isMoving) {
+                    isMoving = moving
+                    _state.value = _state.value.copy(isMoving = moving)
+                    TrackLog.log("rörelsevakt: ${if (moving) "i rörelse" else "stilla"} (nivå ${"%.2f".format(motionWindow.average())})")
+                }
+            }
+            Sensor.TYPE_STEP_COUNTER -> {
+                val counter = event.values[0].toLong()
+                if (_state.value.phase == TrackingPhase.ACTIVE) {
+                    if (stepCounterLast >= 0 && counter > stepCounterLast) {
+                        stepsDuringActivity += counter - stepCounterLast
+                    }
+                    stepCounterLast = counter
+                } else {
+                    // följ med räknaren utanför ACTIVE utan att ackumulera
+                    stepCounterLast = counter
+                }
+            }
+        }
+    }
+
+    override fun onAccuracyChanged(sensor: Sensor?, accuracy: Int) = Unit
+
+    /* ---------- Stopp & städning ---------- */
+
+    private fun stopTracking() {
+        // Räkna in pågående aktiv stint
+        if (_state.value.phase == TrackingPhase.ACTIVE && activeSinceElapsed > 0) {
+            accumulatedActiveMs += SystemClock.elapsedRealtime() - activeSinceElapsed
+            activeSinceElapsed = 0L
+        }
+        val s = _state.value
+        TrackLog.log(
+            "stopp: ${(accumulatedActiveMs / 1000)}s aktiv tid, ${"%.0f".format(s.distanceMeters)} m, " +
+                "+${"%.0f".format(s.elevationGainMeters)} hm, ${s.points.size} punkter, " +
+                "steg=${s.steps ?: "?"}, kcal=${s.kcal?.toInt() ?: "?"}"
+        )
+        sensorManager?.unregisterListener(this)
+        locationManager?.removeUpdates(this)
+        _state.value = _state.value.copy(
+            isActive = false,
+            elapsedSeconds = (accumulatedActiveMs / 1000).toInt(),
+        )
+        stopForeground(STOP_FOREGROUND_REMOVE)
+        stopSelf()
+    }
+
+    override fun onDestroy() {
+        sensorManager?.unregisterListener(this)
+        locationManager?.removeUpdates(this)
+        if (_state.value.isActive) _state.value = _state.value.copy(isActive = false)
+        scope.cancel()
+        super.onDestroy()
+    }
+
+    override fun onBind(intent: Intent?) = null
+
+    /* ---------- Notis ---------- */
+
+    private fun createChannel() {
+        val channel = NotificationChannel(
+            CHANNEL_ID, "Aktivitetsspårning", NotificationManager.IMPORTANCE_LOW,
+        ).apply { description = "Pågående aktivitet (GPS/timer)" }
+        getSystemService(NotificationManager::class.java).createNotificationChannel(channel)
+    }
+
+    private fun buildNotification(): Notification {
+        val s = _state.value
+        val open = PendingIntent.getActivity(
+            this, 0,
+            Intent(this, MainActivity::class.java),
+            PendingIntent.FLAG_IMMUTABLE,
+        )
+        val text = when (s.phase) {
+            TrackingPhase.READY -> "Redo — tryck play i appen"
+            TrackingPhase.PAUSED -> "Pausad · ${formatElapsed(s.elapsedSeconds)}"
+            else -> buildString {
+                append(formatElapsed(s.elapsedSeconds))
+                if (s.isDistanceBased) append(" · ${"%.2f".format(s.distanceMeters / 1000)} km")
+                s.kcal?.let { append(" · ${it.toInt()} kcal") }
+            }
+        }
+        return NotificationCompat.Builder(this, CHANNEL_ID)
+            .setSmallIcon(android.R.drawable.ic_menu_mylocation)
+            .setContentTitle(s.typeName)
+            .setContentText(text)
+            .setOngoing(true)
+            .setOnlyAlertOnce(true)
+            .setContentIntent(open)
+            .build()
+    }
+
+    private fun formatElapsed(sec: Int): String {
+        val h = sec / 3600
+        val m = (sec % 3600) / 60
+        val s = sec % 60
+        return if (h > 0) "%d:%02d:%02d".format(h, m, s) else "%d:%02d".format(m, s)
+    }
+
+    companion object {
+        private const val CHANNEL_ID = "activity_tracking"
+        private const val NOTIFICATION_ID = 44
+
+        const val ACTION_STOP = "eu.brassepc.fitnessdroid.TRACKING_STOP"
+        const val ACTION_PLAY = "eu.brassepc.fitnessdroid.TRACKING_PLAY"
+        const val ACTION_PAUSE = "eu.brassepc.fitnessdroid.TRACKING_PAUSE"
+        const val EXTRA_TYPE_ID = "typeId"
+        const val EXTRA_TYPE_KEY = "typeKey"
+        const val EXTRA_TYPE_NAME = "typeName"
+        const val EXTRA_CATEGORY = "category"
+        const val EXTRA_MET = "met"
+        const val EXTRA_DISTANCE_BASED = "distanceBased"
+        const val EXTRA_WEIGHT_KG = "weightKg"
+        const val EXTRA_GPS_ACC_LIMIT = "gpsAccLimit"
+        const val EXTRA_GPS_SPEED_FACTOR = "gpsSpeedFactor"
+        const val EXTRA_GPS_SPEED_FLOOR = "gpsSpeedFloor"
+        const val EXTRA_MOTION_GUARD = "motionGuard"
+        const val EXTRA_MOTION_THRESHOLD = "motionThreshold"
+        const val EXTRA_COUNTDOWN = "countdownSeconds"
+
+        private val _state = MutableStateFlow(TrackingState())
+        /** Läses av UI:t — servicen äger sanningen. */
+        val state: StateFlow<TrackingState> = _state.asStateFlow()
+
+        fun start(
+            context: Context,
+            type: ActivityType,
+            weightKg: Double?,
+            gpsAccuracyLimitM: Int = 35,
+            gpsSpeedFactor: Double = 2.0,
+            gpsSpeedFloorKmh: Int = 12,
+            motionGuardEnabled: Boolean = true,
+            motionThreshold: Double = 0.35,
+            countdownSeconds: Int = 3,
+        ) {
+            val intent = Intent(context, TrackingService::class.java).apply {
+                putExtra(EXTRA_TYPE_ID, type.id)
+                putExtra(EXTRA_TYPE_KEY, type.key)
+                putExtra(EXTRA_TYPE_NAME, type.nameSv)
+                putExtra(EXTRA_CATEGORY, type.category)
+                putExtra(EXTRA_MET, type.met)
+                putExtra(EXTRA_DISTANCE_BASED, type.isDistanceBased)
+                weightKg?.let { putExtra(EXTRA_WEIGHT_KG, it) }
+                putExtra(EXTRA_GPS_ACC_LIMIT, gpsAccuracyLimitM)
+                putExtra(EXTRA_GPS_SPEED_FACTOR, gpsSpeedFactor)
+                putExtra(EXTRA_GPS_SPEED_FLOOR, gpsSpeedFloorKmh)
+                putExtra(EXTRA_MOTION_GUARD, motionGuardEnabled)
+                putExtra(EXTRA_MOTION_THRESHOLD, motionThreshold)
+                putExtra(EXTRA_COUNTDOWN, countdownSeconds)
+            }
+            context.startForegroundService(intent)
+        }
+
+        fun play(context: Context) {
+            context.startService(
+                Intent(context, TrackingService::class.java).apply { action = ACTION_PLAY }
+            )
+        }
+
+        fun pause(context: Context) {
+            context.startService(
+                Intent(context, TrackingService::class.java).apply { action = ACTION_PAUSE }
+            )
+        }
+
+        fun stop(context: Context) {
+            context.startService(
+                Intent(context, TrackingService::class.java).apply { action = ACTION_STOP }
+            )
+        }
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/data/UpdateChecker.kt

@@ -0,0 +1,109 @@
+package eu.brassepc.fitnessdroid.data
+
+import android.content.Context
+import android.content.Intent
+import androidx.core.content.FileProvider
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.intOrNull
+import kotlinx.serialization.json.jsonObject
+import kotlinx.serialization.json.jsonPrimitive
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import java.io.File
+import java.security.MessageDigest
+import java.util.concurrent.TimeUnit
+
+data class UpdateInfo(
+    val versionCode: Long,
+    val versionName: String,
+    val apkUrl: String,
+    val sha256: String?,
+)
+
+/**
+ * Uppdateringskoll mot släppsidans version.json (skrivs av CI:t).
+ * Nedladdning till appens cache + verifiering, sedan Androids
+ * installationsdialog — samma signeringsnyckel gör att den uppdaterar
+ * rakt över befintlig installation.
+ */
+class UpdateChecker(private val context: Context) {
+
+    private val http = OkHttpClient.Builder()
+        .connectTimeout(10, TimeUnit.SECONDS)
+        .readTimeout(120, TimeUnit.SECONDS)
+        .build()
+
+    private fun installedVersionCode(): Long =
+        context.packageManager.getPackageInfo(context.packageName, 0).longVersionCode
+
+    /** null = uppdaterad, nätfel eller trasig manifest — stör aldrig användaren. */
+    suspend fun check(): UpdateInfo? = withContext(Dispatchers.IO) {
+        runCatching {
+            val request = Request.Builder().url(VERSION_URL).build()
+            http.newCall(request).execute().use { response ->
+                if (!response.isSuccessful) return@withContext null
+                val o = Json.parseToJsonElement(response.body!!.string()).jsonObject
+                val info = UpdateInfo(
+                    versionCode = (o["versionCode"]?.jsonPrimitive?.intOrNull ?: 0).toLong(),
+                    versionName = o["versionName"]?.jsonPrimitive?.content ?: "?",
+                    apkUrl = o["apkUrl"]?.jsonPrimitive?.content ?: return@withContext null,
+                    sha256 = o["sha256"]?.jsonPrimitive?.content,
+                )
+                if (info.versionCode > installedVersionCode()) info else null
+            }
+        }.getOrNull()
+    }
+
+    /** Laddar ner APK:n till cachen, verifierar sha256, returnerar filen. */
+    suspend fun download(info: UpdateInfo, onProgress: (Float) -> Unit): File =
+        withContext(Dispatchers.IO) {
+            val dir = File(context.cacheDir, "updates").apply { mkdirs() }
+            val file = File(dir, "FitnessDroid-${info.versionCode}.apk")
+            val request = Request.Builder().url(info.apkUrl).build()
+            http.newCall(request).execute().use { response ->
+                if (!response.isSuccessful) error("HTTP ${response.code}")
+                val body = response.body!!
+                val total = body.contentLength().takeIf { it > 0 }
+                val digest = MessageDigest.getInstance("SHA-256")
+                body.byteStream().use { input ->
+                    file.outputStream().use { output ->
+                        val buffer = ByteArray(64 * 1024)
+                        var read: Int
+                        var done = 0L
+                        while (input.read(buffer).also { read = it } != -1) {
+                            output.write(buffer, 0, read)
+                            digest.update(buffer, 0, read)
+                            done += read
+                            total?.let { onProgress(done.toFloat() / it) }
+                        }
+                    }
+                }
+                val actual = digest.digest().joinToString("") { "%02x".format(it) }
+                if (info.sha256 != null && !actual.equals(info.sha256, ignoreCase = true)) {
+                    file.delete()
+                    error("sha256 stämmer inte — avbryter")
+                }
+            }
+            file
+        }
+
+    /** Öppnar Androids installationsdialog för den nedladdade APK:n. */
+    fun install(file: File) {
+        val uri = FileProvider.getUriForFile(
+            context, "${context.packageName}.fileprovider", file,
+        )
+        context.startActivity(
+            Intent(Intent.ACTION_VIEW).apply {
+                setDataAndType(uri, "application/vnd.android.package-archive")
+                addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_ACTIVITY_NEW_TASK)
+            }
+        )
+    }
+
+    companion object {
+        private const val VERSION_URL =
+            "https://gitea.brasse-pc.eu/brasse/FitnessDroid/releases/download/latest/version.json"
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/data/local/AppDatabase.kt

@@ -0,0 +1,76 @@
+package eu.brassepc.fitnessdroid.data.local
+
+import android.content.Context
+import androidx.room.Database
+import androidx.room.Room
+import androidx.room.RoomDatabase
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+@Database(
+    entities = [
+        LocalSession::class,
+        LocalExercise::class,
+        LocalSet::class,
+        PendingOp::class,
+        CachedExerciseType::class,
+        CachedMuscleGroup::class,
+        CachedMuscle::class,
+        CachedStartCard::class,
+        CachedPb::class,
+        PendingActivity::class,
+    ],
+    version = 5,
+    exportSchema = false,
+)
+abstract class AppDatabase : RoomDatabase() {
+    abstract fun sessionDao(): SessionDao
+    abstract fun opDao(): OpDao
+    abstract fun cacheDao(): CacheDao
+
+    companion object {
+        private val MIGRATION_1_2 = object : Migration(1, 2) {
+            override fun migrate(db: SupportSQLiteDatabase) {
+                db.execSQL("ALTER TABLE local_session ADD COLUMN durationSecondsOverride INTEGER")
+            }
+        }
+
+        private val MIGRATION_2_3 = object : Migration(2, 3) {
+            override fun migrate(db: SupportSQLiteDatabase) {
+                db.execSQL("ALTER TABLE local_session ADD COLUMN editedStartEpochMs INTEGER")
+            }
+        }
+
+        private val MIGRATION_3_4 = object : Migration(3, 4) {
+            override fun migrate(db: SupportSQLiteDatabase) {
+                db.execSQL(
+                    "CREATE TABLE IF NOT EXISTS `cached_pb` (" +
+                        "`key` TEXT NOT NULL, `exerciseTypeId` INTEGER NOT NULL, " +
+                        "`reps` INTEGER NOT NULL, `weight` REAL NOT NULL, " +
+                        "PRIMARY KEY(`key`))"
+                )
+            }
+        }
+
+        private val MIGRATION_4_5 = object : Migration(4, 5) {
+            override fun migrate(db: SupportSQLiteDatabase) {
+                db.execSQL(
+                    "CREATE TABLE IF NOT EXISTS `pending_activity` (" +
+                        "`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, " +
+                        "`activityTypeId` INTEGER NOT NULL, `typeName` TEXT NOT NULL, " +
+                        "`isCardio` INTEGER NOT NULL DEFAULT 0, " +
+                        "`startedAtIso` TEXT NOT NULL, `durationSeconds` INTEGER NOT NULL, " +
+                        "`distanceMeters` REAL, `elevationGainMeters` REAL, `rpe` REAL, " +
+                        "`source` TEXT NOT NULL DEFAULT 'manual', " +
+                        "`routePolyline` TEXT, `notes` TEXT)"
+                )
+            }
+        }
+
+        fun build(context: Context): AppDatabase =
+            Room.databaseBuilder(context, AppDatabase::class.java, "fitnessdroid.db")
+                .addMigrations(MIGRATION_1_2, MIGRATION_2_3, MIGRATION_3_4, MIGRATION_4_5)
+                .fallbackToDestructiveMigration()
+                .build()
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/data/local/Daos.kt

@@ -0,0 +1,161 @@
+package eu.brassepc.fitnessdroid.data.local
+
+import androidx.room.Dao
+import androidx.room.Insert
+import androidx.room.Query
+import androidx.room.Transaction
+import androidx.room.Update
+import kotlinx.coroutines.flow.Flow
+
+@Dao
+interface SessionDao {
+    @Insert
+    suspend fun insertSession(session: LocalSession): Long
+
+    @Insert
+    suspend fun insertExercise(exercise: LocalExercise): Long
+
+    @Insert
+    suspend fun insertSet(set: LocalSet): Long
+
+    @Update
+    suspend fun updateSession(session: LocalSession)
+
+    @Update
+    suspend fun updateExercise(exercise: LocalExercise)
+
+    @Update
+    suspend fun updateSet(set: LocalSet)
+
+    @Query("SELECT * FROM local_session WHERE status = 'active' ORDER BY id DESC LIMIT 1")
+    fun activeSession(): Flow<LocalSession?>
+
+    @Query("SELECT * FROM local_session WHERE id = :id")
+    suspend fun session(id: Long): LocalSession?
+
+    @Query("SELECT id FROM local_session WHERE status = 'active' ORDER BY id DESC LIMIT 1")
+    suspend fun activeSessionIdNow(): Long?
+
+    @Query("SELECT * FROM local_exercise WHERE sessionId = :sessionId ORDER BY `order`")
+    fun exercises(sessionId: Long): Flow<List<LocalExercise>>
+
+    @Query("SELECT * FROM local_exercise WHERE id = :id")
+    suspend fun exercise(id: Long): LocalExercise?
+
+    @Query("SELECT * FROM local_set WHERE exerciseId IN (SELECT id FROM local_exercise WHERE sessionId = :sessionId) ORDER BY `order`")
+    fun setsForSession(sessionId: Long): Flow<List<LocalSet>>
+
+    @Query("SELECT * FROM local_set WHERE id = :id")
+    suspend fun set(id: Long): LocalSet?
+
+    @Query("SELECT COUNT(*) FROM local_exercise WHERE sessionId = :sessionId")
+    suspend fun exerciseCount(sessionId: Long): Int
+
+    @Query("SELECT COUNT(*) FROM local_set WHERE exerciseId = :exerciseId")
+    suspend fun setCount(exerciseId: Long): Int
+
+    @Query("DELETE FROM local_exercise WHERE id = :id")
+    suspend fun deleteExercise(id: Long)
+
+    @Query("DELETE FROM local_set WHERE id = :id")
+    suspend fun deleteSet(id: Long)
+}
+
+@Dao
+interface OpDao {
+    @Insert
+    suspend fun enqueue(op: PendingOp): Long
+
+    @Update
+    suspend fun update(op: PendingOp)
+
+    @Query("SELECT * FROM pending_op ORDER BY id LIMIT 1")
+    suspend fun next(): PendingOp?
+
+    @Query("DELETE FROM pending_op WHERE id = :id")
+    suspend fun done(id: Long)
+
+    @Query("SELECT COUNT(*) FROM pending_op")
+    fun pendingCount(): Flow<Int>
+
+    @Query("SELECT COUNT(*) FROM pending_op")
+    suspend fun pendingCountNow(): Int
+
+    /* ---- Aktiviteter loggade offline ---- */
+
+    @Insert
+    suspend fun enqueueActivity(activity: PendingActivity): Long
+
+    @Query("SELECT * FROM pending_activity WHERE id = :id")
+    suspend fun pendingActivity(id: Long): PendingActivity?
+
+    @Query("DELETE FROM pending_activity WHERE id = :id")
+    suspend fun activityDone(id: Long)
+
+    @Query("SELECT * FROM pending_activity ORDER BY id DESC")
+    fun pendingActivities(): Flow<List<PendingActivity>>
+}
+
+@Dao
+interface CacheDao {
+    @Query("SELECT * FROM cached_exercise_type ORDER BY isFavorite DESC, name")
+    fun exerciseTypes(): Flow<List<CachedExerciseType>>
+
+    @Query("SELECT * FROM cached_exercise_type WHERE id = :id")
+    suspend fun exerciseType(id: Int): CachedExerciseType?
+
+    @Query("SELECT * FROM cached_muscle_group ORDER BY name")
+    fun muscleGroups(): Flow<List<CachedMuscleGroup>>
+
+    @Query("SELECT * FROM cached_muscle ORDER BY name")
+    fun muscles(): Flow<List<CachedMuscle>>
+
+    @Query("SELECT * FROM cached_start_card ORDER BY sortOrder")
+    fun startCards(): Flow<List<CachedStartCard>>
+
+    @Transaction
+    suspend fun replaceExerciseTypes(rows: List<CachedExerciseType>) {
+        // Behåll lastWeight/lastReps-fälten vid refresh — de fylls på separat.
+        for (row in rows) {
+            val old = exerciseType(row.id)
+            upsertExerciseType(
+                if (old != null) row.copy(
+                    lastWeight = old.lastWeight,
+                    lastReps = old.lastReps,
+                    lastDurationSeconds = old.lastDurationSeconds,
+                    lastDistanceMeters = old.lastDistanceMeters,
+                ) else row
+            )
+        }
+    }
+
+    @androidx.room.Upsert
+    suspend fun upsertExerciseType(row: CachedExerciseType)
+
+    @androidx.room.Upsert
+    suspend fun upsertMuscleGroups(rows: List<CachedMuscleGroup>)
+
+    @androidx.room.Upsert
+    suspend fun upsertMuscles(rows: List<CachedMuscle>)
+
+    @Query("DELETE FROM cached_start_card")
+    suspend fun clearStartCards()
+
+    @androidx.room.Upsert
+    suspend fun upsertStartCards(rows: List<CachedStartCard>)
+
+    @Query("UPDATE cached_exercise_type SET lastWeight = :weight, lastReps = :reps, lastDurationSeconds = :duration, lastDistanceMeters = :distance WHERE id = :id")
+    suspend fun updateLastPerformance(id: Int, weight: Double?, reps: Int?, duration: Int?, distance: Double?)
+
+    @Query("UPDATE cached_exercise_type SET isFavorite = :favorite WHERE id = :id")
+    suspend fun setExerciseFavorite(id: Int, favorite: Boolean)
+
+    @Query("SELECT * FROM cached_pb")
+    suspend fun personalBests(): List<CachedPb>
+
+    @Query("DELETE FROM cached_pb")
+    suspend fun clearPersonalBests()
+
+    @androidx.room.Upsert
+    suspend fun upsertPersonalBests(rows: List<CachedPb>)
+}

app/src/main/java/eu/brassepc/fitnessdroid/data/local/Entities.kt

@@ -0,0 +1,152 @@
+package eu.brassepc.fitnessdroid.data.local
+
+import androidx.room.Entity
+import androidx.room.Index
+import androidx.room.PrimaryKey
+
+/**
+ * Lokal-först-modell: passet lever i Room medan du tränar och synkas till
+ * servern via op-kön ([PendingOp]) i bakgrunden. serverId är null tills
+ * motsvarande mutation gått igenom — det driver synk-indikatorerna i UI:t.
+ */
+
+@Entity(tableName = "local_session")
+data class LocalSession(
+    @PrimaryKey(autoGenerate = true) val id: Long = 0,
+    val serverId: Int? = null,
+    val name: String? = null,
+    val notes: String? = null,
+    val startedAtEpochMs: Long,
+    /** "active" eller "completed" (lokalt avslutad, ev. ej synkad än) */
+    val status: String = "active",
+    /** Manuellt rättad passtid — skickas som durationSecondsOverride vid avslut */
+    val durationSecondsOverride: Int? = null,
+    /** Manuellt rättad starttid — skickas som updateGymSession(date) vid avslut */
+    val editedStartEpochMs: Long? = null,
+)
+
+@Entity(
+    tableName = "local_exercise",
+    indices = [Index("sessionId")],
+)
+data class LocalExercise(
+    @PrimaryKey(autoGenerate = true) val id: Long = 0,
+    val sessionId: Long,
+    val serverId: Int? = null,
+    val exerciseTypeId: Int,
+    val order: Int,
+    val notes: String? = null,
+)
+
+@Entity(
+    tableName = "local_set",
+    indices = [Index("exerciseId")],
+)
+data class LocalSet(
+    @PrimaryKey(autoGenerate = true) val id: Long = 0,
+    val exerciseId: Long,
+    val serverId: Int? = null,
+    val order: Int,
+    val reps: Int? = null,
+    val weight: Double? = null,
+    val distanceMeters: Double? = null,
+    val durationSeconds: Int? = null,
+    val rpe: Double? = null,
+    val isWarmup: Boolean = false,
+    val isCompleted: Boolean = true,
+    val loggedAtEpochMs: Long,
+)
+
+/** Kön av mutationer som väntar på att nå servern. Körs strikt i id-ordning. */
+@Entity(tableName = "pending_op")
+data class PendingOp(
+    @PrimaryKey(autoGenerate = true) val id: Long = 0,
+    /** se [eu.brassepc.fitnessdroid.data.OpKind] */
+    val kind: String,
+    /** Lokalt id på raden operationen gäller (session/övning/set beroende på kind) */
+    val targetLocalId: Long,
+    val createdAtEpochMs: Long,
+    val attempts: Int = 0,
+    val lastError: String? = null,
+)
+
+/** Aktivitet som väntar på att synkas till servern (loggad offline). */
+@Entity(tableName = "pending_activity")
+data class PendingActivity(
+    @PrimaryKey(autoGenerate = true) val id: Long = 0,
+    val activityTypeId: Int,
+    /** För visning i listan innan synk */
+    val typeName: String,
+    val isCardio: Boolean = false,
+    val startedAtIso: String,
+    val durationSeconds: Int,
+    val distanceMeters: Double? = null,
+    val elevationGainMeters: Double? = null,
+    val rpe: Double? = null,
+    val source: String = "manual",
+    val routePolyline: String? = null,
+    val notes: String? = null,
+)
+
+/* ---------- Referensdata-cache (funkar offline) ---------- */
+
+@Entity(tableName = "cached_exercise_type")
+data class CachedExerciseType(
+    @PrimaryKey val id: Int,
+    val name: String,
+    val description: String? = null,
+    val metValue: Double = 5.0,
+    val tracksWeight: Boolean = false,
+    val tracksReps: Boolean = false,
+    val tracksDistance: Boolean = false,
+    val tracksDuration: Boolean = false,
+    val isBodyweight: Boolean = false,
+    /** kommaseparerade muskel-id:n */
+    val muscleIds: String = "",
+    val isFavorite: Boolean = false,
+    /** från API-tillägget ExerciseType.defaultRestSeconds; null → appens standardvila */
+    val defaultRestSeconds: Int? = null,
+    /** Senast kända prestation (för förifyllnad offline) */
+    val lastWeight: Double? = null,
+    val lastReps: Int? = null,
+    val lastDurationSeconds: Int? = null,
+    val lastDistanceMeters: Double? = null,
+)
+
+@Entity(tableName = "cached_muscle_group")
+data class CachedMuscleGroup(
+    @PrimaryKey val id: Int,
+    val name: String,
+    /** från API-tillägget MuscleGroup.iconKey; null → namnheuristik */
+    val iconKey: String? = null,
+)
+
+@Entity(tableName = "cached_muscle")
+data class CachedMuscle(
+    @PrimaryKey val id: Int,
+    val name: String,
+    val muscleGroupId: Int? = null,
+)
+
+/** Personbästa per övning och rep-antal — för PB-markering vid avslut. */
+@Entity(tableName = "cached_pb")
+data class CachedPb(
+    /** "<exerciseTypeId>-<reps>" */
+    @PrimaryKey val key: String,
+    val exerciseTypeId: Int,
+    val reps: Int,
+    val weight: Double,
+)
+
+/** Favoritpass/mallar som visas på hemskärmen, cachade för offline-start. */
+@Entity(tableName = "cached_start_card")
+data class CachedStartCard(
+    /** "template-<id>" eller "favsession-<id>" */
+    @PrimaryKey val key: String,
+    val title: String,
+    val subtitle: String,
+    /** kommaseparerade exerciseTypeId:n i ordning — används för att starta passet */
+    val exerciseTypeIds: String,
+    val templateId: Int? = null,
+    val sortOrder: Int = 0,
+)

app/src/main/java/eu/brassepc/fitnessdroid/ui/AppRoot.kt

@@ -0,0 +1,272 @@
+package eu.brassepc.fitnessdroid.ui
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.offset
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.List
+import androidx.compose.material.icons.filled.BarChart
+import androidx.compose.material.icons.filled.Home
+import androidx.compose.material.icons.filled.Person
+import androidx.compose.material.icons.filled.PlayArrow
+import androidx.compose.material3.FloatingActionButton
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.NavigationBar
+import androidx.compose.material3.NavigationBarItem
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.navigation.NavHostController
+import androidx.navigation.NavType
+import androidx.navigation.compose.NavHost
+import androidx.navigation.compose.composable
+import androidx.navigation.compose.currentBackStackEntryAsState
+import androidx.navigation.compose.rememberNavController
+import androidx.navigation.navArgument
+import eu.brassepc.fitnessdroid.ui.about.AboutScreen
+import eu.brassepc.fitnessdroid.ui.activities.ActivitiesScreen
+import eu.brassepc.fitnessdroid.ui.goals.GoalsScreen
+import eu.brassepc.fitnessdroid.ui.history.HistoryDetailScreen
+import eu.brassepc.fitnessdroid.ui.history.HistoryScreen
+import eu.brassepc.fitnessdroid.ui.home.HomeScreen
+import eu.brassepc.fitnessdroid.ui.picker.ExercisePickerScreen
+import eu.brassepc.fitnessdroid.ui.profile.ProfileScreen
+import eu.brassepc.fitnessdroid.ui.scale.ScalePairScreen
+import eu.brassepc.fitnessdroid.ui.scale.WeighScreen
+import eu.brassepc.fitnessdroid.ui.track.TrackScreen
+import eu.brassepc.fitnessdroid.ui.session.SessionScreen
+import eu.brassepc.fitnessdroid.ui.settings.SettingsScreen
+import eu.brassepc.fitnessdroid.ui.stats.StatsScreen
+
+object Routes {
+    const val HOME = "home"
+    const val HISTORY = "history"
+    const val HISTORY_DETAIL = "history/{id}"
+    const val STATS = "stats"
+    const val PROFILE = "profile"
+    const val SETTINGS = "settings"
+    const val SESSION = "session"
+    const val PICKER = "picker"
+    const val SCALE = "scale"
+    const val WEIGH = "weigh"
+    const val ABOUT = "about"
+    const val ACTIVITIES = "activities"
+    const val GOALS = "goals"
+    const val TRACK = "track/{typeId}"
+
+    fun track(typeId: Int) = "track/$typeId"
+
+    fun historyDetail(id: Int) = "history/$id"
+}
+
+private data class TabItem(val route: String, val label: String, val icon: ImageVector)
+
+private val tabs = listOf(
+    TabItem(Routes.HOME, "Hem", Icons.Default.Home),
+    TabItem(Routes.HISTORY, "Pass", Icons.AutoMirrored.Filled.List),
+    TabItem(Routes.STATS, "Statistik", Icons.Default.BarChart),
+    TabItem(Routes.PROFILE, "Profil", Icons.Default.Person),
+)
+
+@Composable
+fun AppRoot(rootViewModel: RootViewModel = viewModel(factory = RootViewModel.Factory)) {
+    val nav = rememberNavController()
+    val backStack by nav.currentBackStackEntryAsState()
+    val route = backStack?.destination?.route
+    val hasActiveSession by rootViewModel.hasActiveSession.collectAsStateWithLifecycle(false)
+    val restState by rootViewModel.restState.collectAsStateWithLifecycle()
+    val pendingCount by rootViewModel.pendingCount.collectAsStateWithLifecycle(0)
+
+    val showChrome = route in tabs.map { it.route }
+
+    Scaffold(
+        bottomBar = {
+            if (showChrome) {
+                Column {
+                    if (hasActiveSession) {
+                        MiniPlayer(
+                            restSecondsLeft = restState?.secondsLeft,
+                            pendingCount = pendingCount,
+                            onOpen = { nav.navigate(Routes.SESSION) },
+                        )
+                    }
+                    BottomBar(nav = nav, currentRoute = route, onStart = {
+                        rootViewModel.startOrResume { nav.navigate(Routes.SESSION) }
+                    })
+                }
+            }
+        },
+    ) { padding ->
+        NavHost(
+            navController = nav,
+            startDestination = Routes.HOME,
+            modifier = Modifier.padding(padding),
+        ) {
+            composable(Routes.HOME) {
+                HomeScreen(
+                    onOpenSession = { nav.navigate(Routes.SESSION) },
+                    onOpenHistory = { nav.navigate(Routes.HISTORY) },
+                    onOpenActivities = { nav.navigate(Routes.ACTIVITIES) },
+                    onOpenTrack = { typeId -> nav.navigate(Routes.track(typeId)) },
+                    onOpenGoals = { nav.navigate(Routes.GOALS) },
+                )
+            }
+            composable(Routes.GOALS) {
+                GoalsScreen(onBack = { nav.popBackStack() })
+            }
+            composable(Routes.ACTIVITIES) {
+                ActivitiesScreen(
+                    onBack = { nav.popBackStack() },
+                    onStartTracking = { typeId -> nav.navigate(Routes.track(typeId)) },
+                )
+            }
+            composable(
+                Routes.TRACK,
+                arguments = listOf(navArgument("typeId") { type = NavType.IntType }),
+            ) { entry ->
+                TrackScreen(
+                    typeId = entry.arguments?.getInt("typeId") ?: 0,
+                    onBack = { nav.popBackStack() },
+                )
+            }
+            composable(Routes.HISTORY) {
+                HistoryScreen(onOpenSession = { id -> nav.navigate(Routes.historyDetail(id)) })
+            }
+            composable(
+                Routes.HISTORY_DETAIL,
+                arguments = listOf(navArgument("id") { type = NavType.IntType }),
+            ) { entry ->
+                HistoryDetailScreen(
+                    sessionId = entry.arguments?.getInt("id") ?: 0,
+                    onBack = { nav.popBackStack() },
+                )
+            }
+            composable(Routes.STATS) { StatsScreen() }
+            composable(Routes.PROFILE) {
+                ProfileScreen(
+                    onOpenSettings = { nav.navigate(Routes.SETTINGS) },
+                    onOpenWeigh = { nav.navigate(Routes.WEIGH) },
+                    onOpenAbout = { nav.navigate(Routes.ABOUT) },
+                )
+            }
+            composable(Routes.SETTINGS) {
+                SettingsScreen(
+                    onBack = { nav.popBackStack() },
+                    onOpenScale = { nav.navigate(Routes.SCALE) },
+                )
+            }
+            composable(Routes.SCALE) { ScalePairScreen(onBack = { nav.popBackStack() }) }
+            composable(Routes.WEIGH) { WeighScreen(onBack = { nav.popBackStack() }) }
+            composable(Routes.ABOUT) { AboutScreen(onBack = { nav.popBackStack() }) }
+            composable(Routes.SESSION) {
+                SessionScreen(
+                    onBack = { nav.popBackStack() },
+                    onAddExercise = { nav.navigate(Routes.PICKER) },
+                    onSessionEnded = {
+                        nav.popBackStack(Routes.HOME, inclusive = false)
+                    },
+                )
+            }
+            composable(Routes.PICKER) {
+                ExercisePickerScreen(onDone = { nav.popBackStack() })
+            }
+        }
+    }
+}
+
+@Composable
+private fun BottomBar(nav: NavHostController, currentRoute: String?, onStart: () -> Unit) {
+    Box {
+        NavigationBar {
+            tabs.forEachIndexed { index, tab ->
+                if (index == 2) {
+                    // plats för mittknappen
+                    NavigationBarItem(
+                        selected = false,
+                        onClick = {},
+                        enabled = false,
+                        icon = {},
+                        label = { Text("") },
+                    )
+                }
+                NavigationBarItem(
+                    selected = currentRoute == tab.route,
+                    onClick = {
+                        nav.navigate(tab.route) {
+                            popUpTo(Routes.HOME) { saveState = true }
+                            launchSingleTop = true
+                            restoreState = true
+                        }
+                    },
+                    icon = { Icon(tab.icon, contentDescription = tab.label) },
+                    label = { Text(tab.label) },
+                )
+            }
+        }
+        FloatingActionButton(
+            onClick = onStart,
+            modifier = Modifier
+                .align(Alignment.TopCenter)
+                .offset(y = (-6).dp),
+            containerColor = MaterialTheme.colorScheme.primary,
+            contentColor = MaterialTheme.colorScheme.onPrimary,
+        ) {
+            Icon(Icons.Default.PlayArrow, contentDescription = "Starta pass")
+        }
+    }
+}
+
+@Composable
+private fun MiniPlayer(restSecondsLeft: Int?, pendingCount: Int, onOpen: () -> Unit) {
+    Surface(
+        color = MaterialTheme.colorScheme.secondaryContainer,
+        modifier = Modifier
+            .fillMaxWidth()
+            .clickable(onClick = onOpen),
+    ) {
+        Row(
+            modifier = Modifier.padding(horizontal = 16.dp, vertical = 10.dp),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            Icon(
+                Icons.Default.PlayArrow,
+                contentDescription = null,
+                tint = MaterialTheme.colorScheme.primary,
+            )
+            Column(modifier = Modifier.weight(1f).padding(start = 10.dp)) {
+                Text("Pass pågår", style = MaterialTheme.typography.labelLarge)
+                val sub = buildString {
+                    if (restSecondsLeft != null && restSecondsLeft > 0) {
+                        append("Vila ${restSecondsLeft / 60}:${"%02d".format(restSecondsLeft % 60)} kvar")
+                    } else {
+                        append("Tryck för att fortsätta")
+                    }
+                    if (pendingCount > 0) append(" · $pendingCount osynkat")
+                }
+                Text(
+                    sub,
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+            Text(
+                "ÖPPNA",
+                style = MaterialTheme.typography.labelLarge,
+                color = MaterialTheme.colorScheme.primary,
+            )
+        }
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/ui/FitnessDroidApp.kt

@@ -13,7 +13,6 @@ import androidx.compose.ui.Modifier
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
 import eu.brassepc.fitnessdroid.data.AuthState
-import eu.brassepc.fitnessdroid.ui.home.HomeScreen
 import eu.brassepc.fitnessdroid.ui.login.LoginScreen
 
 @Composable
@@ -35,7 +34,7 @@ fun FitnessDroidApp(appViewModel: AppViewModel = viewModel(factory = AppViewMode
                 }
             }
             AuthState.LoggedOut -> LoginScreen()
-            is AuthState.LoggedIn -> HomeScreen()
+            is AuthState.LoggedIn -> AppRoot()
         }
     }
 }

app/src/main/java/eu/brassepc/fitnessdroid/ui/RootViewModel.kt

@@ -0,0 +1,49 @@
+package eu.brassepc.fitnessdroid.ui
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.viewmodel.initializer
+import androidx.lifecycle.viewmodel.viewModelFactory
+import eu.brassepc.fitnessdroid.data.GymRepository
+import eu.brassepc.fitnessdroid.data.RestTimerController
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.stateIn
+import kotlinx.coroutines.launch
+
+class RootViewModel(
+    private val repo: GymRepository,
+    restTimer: RestTimerController,
+) : ViewModel() {
+
+    val hasActiveSession = repo.activeSession.map { it != null }
+    val restState = restTimer.state
+    val pendingCount = repo.pendingCount
+
+    private val activeSessionState = repo.activeSession
+        .stateIn(viewModelScope, SharingStarted.Eagerly, null)
+
+    init {
+        repo.refreshAllAsync()
+    }
+
+    /** Mittknappen: öppna pågående pass, eller starta ett fritt pass. */
+    fun startOrResume(onReady: () -> Unit) {
+        viewModelScope.launch {
+            if (activeSessionState.value == null) {
+                repo.startFreeSession()
+            }
+            onReady()
+        }
+    }
+
+    companion object {
+        val Factory: ViewModelProvider.Factory = viewModelFactory {
+            initializer {
+                val c = appContainer()
+                RootViewModel(c.gymRepository, c.restTimer)
+            }
+        }
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/ui/about/AboutScreen.kt

@@ -0,0 +1,136 @@
+package eu.brassepc.fitnessdroid.ui.about
+
+import android.content.Intent
+import android.net.Uri
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.automirrored.filled.OpenInNew
+import androidx.compose.material3.Card
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.unit.dp
+import eu.brassepc.fitnessdroid.BuildConfig
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun AboutScreen(onBack: () -> Unit) {
+    val context = LocalContext.current
+    fun open(url: String) {
+        runCatching { context.startActivity(Intent(Intent.ACTION_VIEW, Uri.parse(url))) }
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text("Om appen") },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = "Tillbaka")
+                    }
+                },
+            )
+        },
+    ) { padding ->
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(padding)
+                .verticalScroll(rememberScrollState())
+                .padding(16.dp),
+            verticalArrangement = Arrangement.spacedBy(14.dp),
+        ) {
+            Card(modifier = Modifier.fillMaxWidth()) {
+                Column(
+                    modifier = Modifier.padding(16.dp),
+                    verticalArrangement = Arrangement.spacedBy(6.dp),
+                ) {
+                    Text("FitnessDroid", style = MaterialTheme.typography.titleMedium)
+                    Text(
+                        "Version ${BuildConfig.VERSION_NAME}",
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                    Text(
+                        "Fri programvara under GNU GPL v3. Du får använda, ändra och " +
+                            "sprida appen vidare under samma licens.",
+                        style = MaterialTheme.typography.bodyMedium,
+                    )
+                    LinkRow("Källkod (Gitea)", "https://gitea.brasse-pc.eu/brasse/FitnessDroid", ::open)
+                    LinkRow("GNU GPL v3", "https://www.gnu.org/licenses/gpl-3.0.html", ::open)
+                }
+            }
+
+            Text("Öppen källkod som används", style = MaterialTheme.typography.titleSmall)
+
+            Card(modifier = Modifier.fillMaxWidth()) {
+                Column(
+                    modifier = Modifier.padding(16.dp),
+                    verticalArrangement = Arrangement.spacedBy(6.dp),
+                ) {
+                    Text("openScale", style = MaterialTheme.typography.titleMedium)
+                    Text(
+                        "Bluetooth-drivrutinerna för kroppsvågar kommer från openScale " +
+                            "av olie.xdev m.fl. (GPL-3.0). Stort tack!",
+                        style = MaterialTheme.typography.bodyMedium,
+                    )
+                    LinkRow("github.com/oliexdev/openScale", "https://github.com/oliexdev/openScale", ::open)
+                }
+            }
+
+            Card(modifier = Modifier.fillMaxWidth()) {
+                Column(
+                    modifier = Modifier.padding(16.dp),
+                    verticalArrangement = Arrangement.spacedBy(6.dp),
+                ) {
+                    Text("Blessed-Kotlin", style = MaterialTheme.typography.titleMedium)
+                    Text(
+                        "BLE-bibliotek av Martijn van Welie (MIT-licens).",
+                        style = MaterialTheme.typography.bodyMedium,
+                    )
+                    LinkRow("github.com/weliem/blessed-kotlin", "https://github.com/weliem/blessed-kotlin", ::open)
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun LinkRow(label: String, url: String, open: (String) -> Unit) {
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .clickable { open(url) }
+            .padding(vertical = 4.dp),
+        verticalAlignment = Alignment.CenterVertically,
+    ) {
+        Text(
+            label,
+            color = MaterialTheme.colorScheme.primary,
+            style = MaterialTheme.typography.bodyMedium,
+            modifier = Modifier.weight(1f),
+        )
+        Icon(
+            Icons.AutoMirrored.Filled.OpenInNew,
+            contentDescription = null,
+            tint = MaterialTheme.colorScheme.primary,
+        )
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/ui/activities/ActivitiesScreen.kt

@@ -0,0 +1,769 @@
+package eu.brassepc.fitnessdroid.ui.activities
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.Add
+import androidx.compose.material.icons.filled.Favorite
+import androidx.compose.material.icons.filled.Map
+import androidx.compose.material.icons.filled.PlayArrow
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.ExtendedFloatingActionButton
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Slider
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.toArgb
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.lifecycle.viewmodel.initializer
+import androidx.lifecycle.viewmodel.viewModelFactory
+import eu.brassepc.fitnessdroid.data.Activity
+import eu.brassepc.fitnessdroid.data.ActivityType
+import eu.brassepc.fitnessdroid.data.GymApi
+import eu.brassepc.fitnessdroid.ui.appContainer
+import eu.brassepc.fitnessdroid.ui.common.compact
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.launch
+import java.time.LocalDateTime
+import java.time.ZoneId
+
+val CATEGORY_LABELS = linkedMapOf(
+    "WALK" to "Promenad",
+    "RUN" to "Löpning",
+    "HIKE" to "Vandring",
+    "CYCLE" to "Cykling",
+    "SWIM" to "Simning",
+    "WATER" to "Vatten",
+    "CARDIO" to "Kondition",
+    "FITNESS" to "Rörlighet",
+    "STRENGTH" to "Styrka",
+    "MARTIAL_ARTS" to "Kampsport & fäktning",
+    "SPORT" to "Sport",
+    "WINTER" to "Vinter",
+    "OTHER" to "Övrigt",
+)
+
+val RPE_LABELS = listOf(
+    "Ingen ansträngning", "Väldigt lätt", "Lätt", "Lätt–måttlig", "Måttlig",
+    "Normal för aktiviteten", "Något ansträngande", "Ansträngande",
+    "Mycket ansträngande", "Nästan max", "Kan inte prata mer än ett par ord",
+)
+
+class ActivitiesViewModel(
+    private val gymApi: GymApi,
+    private val repo: eu.brassepc.fitnessdroid.data.GymRepository,
+) : ViewModel() {
+    val types = MutableStateFlow<List<ActivityType>>(emptyList())
+    val activities = MutableStateFlow<List<Activity>>(emptyList())
+    val message = MutableStateFlow<String?>(null)
+
+    /** Offline-loggade aktiviteter som väntar på synk. */
+    val pending = repo.pendingActivities
+
+    init { load() }
+
+    fun load() {
+        viewModelScope.launch {
+            runCatching { types.value = gymApi.activityTypes() }
+                .onFailure { message.value = "Kunde inte hämta aktivitetsbiblioteket — offline?" }
+            runCatching { activities.value = gymApi.activities() }
+        }
+    }
+
+    fun save(
+        editingId: String?,
+        type: ActivityType,
+        startedAt: LocalDateTime,
+        durationSeconds: Int,
+        distanceKm: Double?,
+        elevation: Double?,
+        rpe: Double?,
+        notes: String?,
+        onDone: () -> Unit,
+    ) {
+        viewModelScope.launch {
+            try {
+                val startedIso = startedAt.atZone(ZoneId.systemDefault()).toInstant().toString()
+                if (editingId == null) {
+                    gymApi.addActivity(
+                        activityTypeId = type.id,
+                        startedAtIso = startedIso,
+                        durationSeconds = durationSeconds,
+                        distanceMeters = distanceKm?.times(1000),
+                        elevationGainMeters = elevation,
+                        rpe = rpe,
+                        notes = notes,
+                    )
+                    message.value = "Aktiviteten loggad"
+                } else {
+                    // -1/"" = rensa på servern
+                    gymApi.updateActivity(
+                        id = editingId,
+                        activityTypeId = type.id,
+                        startedAtIso = startedIso,
+                        durationSeconds = durationSeconds,
+                        distanceMeters = distanceKm?.times(1000) ?: -1.0,
+                        elevationGainMeters = elevation ?: -1.0,
+                        rpe = rpe ?: -1.0,
+                        notes = notes ?: "",
+                    )
+                    message.value = "Aktiviteten uppdaterad"
+                }
+                load()
+                onDone()
+            } catch (e: Exception) {
+                if (editingId == null) {
+                    // Ny aktivitet offline → köa lokalt (synkas som passen)
+                    runCatching {
+                        repo.queueActivity(
+                            eu.brassepc.fitnessdroid.data.local.PendingActivity(
+                                activityTypeId = type.id,
+                                typeName = type.nameSv,
+                                isCardio = type.isCardio,
+                                startedAtIso = startedAt
+                                    .atZone(ZoneId.systemDefault()).toInstant().toString(),
+                                durationSeconds = durationSeconds,
+                                distanceMeters = distanceKm?.times(1000),
+                                elevationGainMeters = elevation,
+                                rpe = rpe,
+                                source = "manual",
+                                notes = notes,
+                            )
+                        )
+                        message.value = "Ingen kontakt med servern — sparad lokalt, synkas automatiskt."
+                        onDone()
+                    }.onFailure { message.value = "Kunde inte spara — försök igen." }
+                } else {
+                    message.value = "Kunde inte uppdatera — offline?"
+                }
+            }
+        }
+    }
+
+    fun delete(id: String, onDone: () -> Unit) {
+        viewModelScope.launch {
+            try {
+                gymApi.deleteActivity(id)
+                message.value = "Aktiviteten borttagen"
+                load()
+                onDone()
+            } catch (e: Exception) {
+                message.value = "Kunde inte ta bort — offline?"
+            }
+        }
+    }
+
+    companion object {
+        val Factory: ViewModelProvider.Factory = viewModelFactory {
+            initializer {
+                val c = appContainer()
+                ActivitiesViewModel(c.gymApi, c.gymRepository)
+            }
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun ActivitiesScreen(
+    onBack: () -> Unit,
+    onStartTracking: (Int) -> Unit = {},
+    viewModel: ActivitiesViewModel = viewModel(factory = ActivitiesViewModel.Factory),
+) {
+    val types by viewModel.types.collectAsStateWithLifecycle()
+    val activities by viewModel.activities.collectAsStateWithLifecycle()
+    val pending by viewModel.pending.collectAsStateWithLifecycle(emptyList())
+    val message by viewModel.message.collectAsStateWithLifecycle()
+    var showLog by remember { mutableStateOf(false) }
+    var showStartPicker by remember { mutableStateOf(false) }
+    var editTarget by remember { mutableStateOf<Activity?>(null) }
+    var mapTarget by remember { mutableStateOf<Activity?>(null) }
+
+    mapTarget?.let { a ->
+        RouteMapDialog(activity = a, onDismiss = { mapTarget = null })
+    }
+
+    // Uppdatera listan när man kommer tillbaka (t.ex. efter avslutad spårning)
+    androidx.compose.runtime.LaunchedEffect(Unit) { viewModel.load() }
+
+    if (showStartPicker) {
+        TypePickerDialog(
+            types = types,
+            title = "Starta aktivitet",
+            onPick = { t ->
+                showStartPicker = false
+                onStartTracking(t.id)
+            },
+            onDismiss = { showStartPicker = false },
+        )
+    }
+
+    if (showLog || editTarget != null) {
+        LogActivityDialog(
+            types = types,
+            editing = editTarget,
+            onSave = { type, start, dur, dist, elev, rpe, notes ->
+                viewModel.save(editTarget?.id, type, start, dur, dist, elev, rpe, notes) {
+                    showLog = false; editTarget = null
+                }
+            },
+            onDelete = editTarget?.let { a -> { viewModel.delete(a.id) { editTarget = null } } },
+            onDismiss = { showLog = false; editTarget = null },
+        )
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = {
+                    Row(verticalAlignment = Alignment.CenterVertically) {
+                        Icon(
+                            Icons.Default.Favorite,
+                            contentDescription = null,
+                            tint = MaterialTheme.colorScheme.primary,
+                        )
+                        Text("Aktiviteter", modifier = Modifier.padding(start = 8.dp))
+                    }
+                },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = "Tillbaka")
+                    }
+                },
+            )
+        },
+        floatingActionButton = {
+            ExtendedFloatingActionButton(onClick = { showLog = true }) {
+                Icon(Icons.Default.Add, contentDescription = null)
+                Text("Logga manuellt", modifier = Modifier.padding(start = 6.dp))
+            }
+        },
+    ) { padding ->
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(padding)
+                .padding(horizontal = 16.dp),
+            verticalArrangement = Arrangement.spacedBy(10.dp),
+        ) {
+            Button(
+                onClick = { showStartPicker = true },
+                modifier = Modifier.fillMaxWidth(),
+            ) {
+                Icon(Icons.Default.PlayArrow, contentDescription = null)
+                Text(
+                    "Starta aktivitet — GPS eller timer",
+                    modifier = Modifier.padding(start = 6.dp),
+                )
+            }
+            message?.let {
+                Text(
+                    it,
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+            if (activities.isEmpty()) {
+                Text(
+                    "Inga aktiviteter loggade än. Tryck på Logga aktivitet — " +
+                        "promenader, löprundor, fäktning och annat du gör över tid.",
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(top = 12.dp),
+                )
+            }
+            LazyColumn(verticalArrangement = Arrangement.spacedBy(8.dp)) {
+                items(pending, key = { "p${'$'}{it.id}" }) { p ->
+                    Card(modifier = Modifier.fillMaxWidth()) {
+                        Row(
+                            modifier = Modifier.padding(horizontal = 14.dp, vertical = 10.dp),
+                            verticalAlignment = Alignment.CenterVertically,
+                        ) {
+                            Column(modifier = Modifier.weight(1f)) {
+                                Text(p.typeName, style = MaterialTheme.typography.titleSmall)
+                                Text(
+                                    "${'$'}{p.startedAtIso.take(10)} · ${'$'}{formatDuration(p.durationSeconds)}" +
+                                        (p.distanceMeters?.let { " · ${'$'}{(it / 1000).compact()} km" } ?: ""),
+                                    style = MaterialTheme.typography.bodySmall,
+                                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                )
+                            }
+                            Text(
+                                "väntar på synk",
+                                style = MaterialTheme.typography.labelSmall,
+                                color = MaterialTheme.colorScheme.tertiary,
+                            )
+                        }
+                    }
+                }
+                items(activities, key = { it.id }) { a ->
+                    ActivityRow(
+                        a,
+                        onClick = { editTarget = a },
+                        onShowMap = if (a.routePolyline != null) {
+                            { mapTarget = a }
+                        } else null,
+                    )
+                }
+            }
+        }
+    }
+}
+
+/** Kategorigrupperad aktivitetsväljare — används av både start- och loggflödet. */
+@Composable
+fun TypePickerDialog(
+    types: List<ActivityType>,
+    title: String,
+    onPick: (ActivityType) -> Unit,
+    onDismiss: () -> Unit,
+) {
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text(title) },
+        text = {
+            Column(
+                modifier = Modifier.verticalScroll(rememberScrollState()),
+                verticalArrangement = Arrangement.spacedBy(2.dp),
+            ) {
+                if (types.isEmpty()) {
+                    Text(
+                        "Aktivitetsbiblioteket kunde inte hämtas — offline?",
+                        color = MaterialTheme.colorScheme.error,
+                    )
+                }
+                CATEGORY_LABELS.forEach { (cat, label) ->
+                    val inCat = types.filter { it.category == cat }
+                    if (inCat.isNotEmpty()) {
+                        Text(
+                            label,
+                            style = MaterialTheme.typography.labelMedium,
+                            color = MaterialTheme.colorScheme.primary,
+                            modifier = Modifier.padding(top = 8.dp),
+                        )
+                        inCat.forEach { t ->
+                            Row(
+                                modifier = Modifier
+                                    .fillMaxWidth()
+                                    .clickable { onPick(t) }
+                                    .padding(vertical = 6.dp),
+                                verticalAlignment = Alignment.CenterVertically,
+                            ) {
+                                if (t.isCardio) {
+                                    Icon(
+                                        Icons.Default.Favorite,
+                                        contentDescription = null,
+                                        tint = MaterialTheme.colorScheme.primary,
+                                        modifier = Modifier.padding(end = 8.dp),
+                                    )
+                                }
+                                Column {
+                                    Text(t.nameSv)
+                                    Text(
+                                        if (t.isDistanceBased) "GPS + distans" else "Timer (ingen rörelsespårning)",
+                                        style = MaterialTheme.typography.labelSmall,
+                                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                    )
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        },
+        confirmButton = {
+            TextButton(onClick = onDismiss) { Text("Avbryt") }
+        },
+    )
+}
+
+@Composable
+private fun ActivityRow(a: Activity, onClick: () -> Unit, onShowMap: (() -> Unit)? = null) {
+    Card(modifier = Modifier.fillMaxWidth().clickable(onClick = onClick)) {
+        Row(
+            modifier = Modifier.padding(horizontal = 14.dp, vertical = 10.dp),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            if (a.activityType.isCardio) {
+                Icon(
+                    Icons.Default.Favorite,
+                    contentDescription = "Kondition",
+                    tint = MaterialTheme.colorScheme.primary,
+                    modifier = Modifier.padding(end = 10.dp),
+                )
+            }
+            Column(modifier = Modifier.weight(1f)) {
+                Text(a.activityType.nameSv, style = MaterialTheme.typography.titleSmall)
+                Text(
+                    buildString {
+                        append(a.startedAt.take(10))
+                        append(" · ${formatDuration(a.durationSeconds)}")
+                        a.distanceMeters?.let {
+                            append(" · ${(it / 1000).compact()} km")
+                            val kmh = (it / 1000) / (a.durationSeconds / 3600.0)
+                            append(" · ${kmh.compact()} km/h")
+                        }
+                        a.rpe?.let { append(" · RPE ${it.toInt()}") }
+                    },
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+            a.estimatedKcal?.let {
+                Text(
+                    "${it.toInt()} kcal",
+                    style = MaterialTheme.typography.titleSmall,
+                    fontWeight = FontWeight.Bold,
+                )
+            }
+            onShowMap?.let {
+                androidx.compose.material3.IconButton(onClick = it) {
+                    Icon(
+                        Icons.Filled.Map,
+                        contentDescription = "Visa rutt",
+                        tint = MaterialTheme.colorScheme.primary,
+                    )
+                }
+            }
+        }
+    }
+}
+
+/** Fullskärmsdialog med rutten på en OSM-karta (osmdroid). */
+@Composable
+fun RouteMapDialog(activity: Activity, onDismiss: () -> Unit) {
+    val points = remember(activity.id) {
+        activity.routePolyline?.let { eu.brassepc.fitnessdroid.data.decodePolyline(it) } ?: emptyList()
+    }
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = {
+            Text("${activity.activityType.nameSv} · ${activity.startedAt.take(10)}")
+        },
+        text = {
+            if (points.size < 2) {
+                Text("Ingen rutt sparad för den här aktiviteten.")
+            } else {
+                val lineColor = MaterialTheme.colorScheme.primary.toArgb()
+                androidx.compose.ui.viewinterop.AndroidView(
+                    factory = { ctx ->
+                        org.osmdroid.config.Configuration.getInstance().apply {
+                            userAgentValue = "FitnessDroid"
+                            osmdroidBasePath = java.io.File(ctx.cacheDir, "osmdroid")
+                            osmdroidTileCache = java.io.File(ctx.cacheDir, "osmdroid/tiles")
+                        }
+                        org.osmdroid.views.MapView(ctx).apply {
+                            setTileSource(org.osmdroid.tileprovider.tilesource.TileSourceFactory.MAPNIK)
+                            setMultiTouchControls(true)
+                            val line = org.osmdroid.views.overlay.Polyline().apply {
+                                outlinePaint.color = lineColor
+                                outlinePaint.strokeWidth = 10f
+                                setPoints(points.map { (lat, lon) -> org.osmdroid.util.GeoPoint(lat, lon) })
+                            }
+                            overlays.add(line)
+                            post {
+                                zoomToBoundingBox(line.bounds.increaseByScale(1.3f), false)
+                            }
+                        }
+                    },
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .height(380.dp),
+                )
+            }
+        },
+        confirmButton = {
+            TextButton(onClick = onDismiss) { Text("Stäng") }
+        },
+    )
+}
+
+private fun formatDuration(sec: Int): String {
+    val h = sec / 3600
+    val m = (sec % 3600) / 60
+    return if (h > 0) "$h h $m min" else "$m min"
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+private fun LogActivityDialog(
+    types: List<ActivityType>,
+    editing: Activity?,
+    onSave: (ActivityType, LocalDateTime, Int, Double?, Double?, Double?, String?) -> Unit,
+    onDelete: (() -> Unit)?,
+    onDismiss: () -> Unit,
+) {
+    var selectedType by remember {
+        mutableStateOf(
+            editing?.activityType
+                ?: types.find { it.key == "walking_city" }
+                ?: types.firstOrNull()
+        )
+    }
+    var showTypePicker by remember { mutableStateOf(false) }
+    var date by remember {
+        mutableStateOf(
+            editing?.let { runCatching { java.time.OffsetDateTime.parse(it.startedAt).atZoneSameInstant(ZoneId.systemDefault()).toLocalDate() }.getOrNull() }
+                ?: java.time.LocalDate.now()
+        )
+    }
+    var time by remember {
+        mutableStateOf(
+            editing?.let { runCatching { java.time.OffsetDateTime.parse(it.startedAt).atZoneSameInstant(ZoneId.systemDefault()).toLocalTime().withSecond(0).withNano(0) }.getOrNull() }
+                ?: java.time.LocalTime.now().minusHours(1).withSecond(0).withNano(0)
+        )
+    }
+    var hours by remember { mutableStateOf(editing?.let { (it.durationSeconds / 3600).takeIf { h -> h > 0 }?.toString() } ?: "") }
+    var minutes by remember { mutableStateOf(editing?.let { ((it.durationSeconds % 3600) / 60).toString() } ?: "") }
+    var distance by remember { mutableStateOf(editing?.distanceMeters?.let { (it / 1000).compact() } ?: "") }
+    var elevation by remember { mutableStateOf(editing?.elevationGainMeters?.let { it.toInt().toString() } ?: "") }
+    var rpe by remember { mutableStateOf(editing?.rpe?.toFloat() ?: 5f) }
+    var notes by remember { mutableStateOf(editing?.notes ?: "") }
+    var showDatePicker by remember { mutableStateOf(false) }
+    var showTimePicker by remember { mutableStateOf(false) }
+
+    val durationSeconds = ((hours.toIntOrNull() ?: 0) * 3600) + ((minutes.toIntOrNull() ?: 0) * 60)
+    val canSave = selectedType != null && durationSeconds > 0
+
+    if (showTypePicker) {
+        AlertDialog(
+            onDismissRequest = { showTypePicker = false },
+            title = { Text("Välj aktivitet") },
+            text = {
+                Column(
+                    modifier = Modifier.verticalScroll(rememberScrollState()),
+                    verticalArrangement = Arrangement.spacedBy(2.dp),
+                ) {
+                    CATEGORY_LABELS.forEach { (cat, label) ->
+                        val inCat = types.filter { it.category == cat }
+                        if (inCat.isNotEmpty()) {
+                            Text(
+                                label,
+                                style = MaterialTheme.typography.labelMedium,
+                                color = MaterialTheme.colorScheme.primary,
+                                modifier = Modifier.padding(top = 8.dp),
+                            )
+                            inCat.forEach { t ->
+                                Row(
+                                    modifier = Modifier
+                                        .fillMaxWidth()
+                                        .clickable {
+                                            selectedType = t
+                                            showTypePicker = false
+                                        }
+                                        .padding(vertical = 6.dp),
+                                    verticalAlignment = Alignment.CenterVertically,
+                                ) {
+                                    if (t.isCardio) {
+                                        Icon(
+                                            Icons.Default.Favorite,
+                                            contentDescription = null,
+                                            tint = MaterialTheme.colorScheme.primary,
+                                            modifier = Modifier.padding(end = 8.dp),
+                                        )
+                                    }
+                                    Text(t.nameSv)
+                                }
+                            }
+                        }
+                    }
+                }
+            },
+            confirmButton = {
+                TextButton(onClick = { showTypePicker = false }) { Text("Stäng") }
+            },
+        )
+        return
+    }
+
+    if (showDatePicker) {
+        val dateState = androidx.compose.material3.rememberDatePickerState(
+            initialSelectedDateMillis = date.atStartOfDay(java.time.ZoneOffset.UTC).toInstant().toEpochMilli(),
+        )
+        androidx.compose.material3.DatePickerDialog(
+            onDismissRequest = { showDatePicker = false },
+            confirmButton = {
+                TextButton(onClick = {
+                    dateState.selectedDateMillis?.let {
+                        date = java.time.Instant.ofEpochMilli(it).atZone(java.time.ZoneOffset.UTC).toLocalDate()
+                    }
+                    showDatePicker = false
+                }) { Text("OK") }
+            },
+            dismissButton = { TextButton(onClick = { showDatePicker = false }) { Text("Avbryt") } },
+        ) { androidx.compose.material3.DatePicker(state = dateState) }
+    }
+
+    if (showTimePicker) {
+        val timeState = androidx.compose.material3.rememberTimePickerState(
+            initialHour = time.hour, initialMinute = time.minute, is24Hour = true,
+        )
+        AlertDialog(
+            onDismissRequest = { showTimePicker = false },
+            title = { Text("Starttid") },
+            text = { androidx.compose.material3.TimePicker(state = timeState) },
+            confirmButton = {
+                TextButton(onClick = {
+                    time = java.time.LocalTime.of(timeState.hour, timeState.minute)
+                    showTimePicker = false
+                }) { Text("OK") }
+            },
+            dismissButton = { TextButton(onClick = { showTimePicker = false }) { Text("Avbryt") } },
+        )
+    }
+
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text(if (editing == null) "Logga aktivitet" else "Rätta aktivitet") },
+        text = {
+            Column(
+                modifier = Modifier.verticalScroll(rememberScrollState()),
+                verticalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                androidx.compose.material3.FilledTonalButton(
+                    onClick = { showTypePicker = true },
+                    modifier = Modifier.fillMaxWidth(),
+                ) {
+                    if (selectedType?.isCardio == true) {
+                        Icon(
+                            Icons.Default.Favorite,
+                            contentDescription = null,
+                            modifier = Modifier.padding(end = 6.dp),
+                        )
+                    }
+                    Text(selectedType?.nameSv ?: "Välj aktivitet…")
+                }
+
+                Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                    androidx.compose.material3.OutlinedButton(
+                        onClick = { showDatePicker = true },
+                        modifier = Modifier.weight(1f),
+                    ) { Text("$date") }
+                    androidx.compose.material3.OutlinedButton(
+                        onClick = { showTimePicker = true },
+                        modifier = Modifier.weight(1f),
+                    ) { Text("%02d:%02d".format(time.hour, time.minute)) }
+                }
+
+                Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                    OutlinedTextField(
+                        value = hours,
+                        onValueChange = { hours = it },
+                        label = { Text("Timmar") },
+                        singleLine = true,
+                        keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
+                        modifier = Modifier.weight(1f),
+                    )
+                    OutlinedTextField(
+                        value = minutes,
+                        onValueChange = { minutes = it },
+                        label = { Text("Minuter") },
+                        singleLine = true,
+                        keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
+                        modifier = Modifier.weight(1f),
+                    )
+                }
+
+                if (selectedType?.isDistanceBased == true) {
+                    Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                        OutlinedTextField(
+                            value = distance,
+                            onValueChange = { distance = it },
+                            label = { Text("Distans (km)") },
+                            singleLine = true,
+                            keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Decimal),
+                            modifier = Modifier.weight(1f),
+                        )
+                        OutlinedTextField(
+                            value = elevation,
+                            onValueChange = { elevation = it },
+                            label = { Text("Höjdmeter") },
+                            singleLine = true,
+                            keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
+                            modifier = Modifier.weight(1f),
+                        )
+                    }
+                } else {
+                    Text(
+                        "Ansträngning: ${RPE_LABELS[rpe.toInt().coerceIn(0, 10)]}",
+                        style = MaterialTheme.typography.labelMedium,
+                    )
+                    Slider(
+                        value = rpe,
+                        onValueChange = { rpe = it },
+                        valueRange = 0f..10f,
+                        steps = 9,
+                    )
+                }
+
+                OutlinedTextField(
+                    value = notes,
+                    onValueChange = { notes = it },
+                    label = { Text("Anteckning (valfritt)") },
+                    singleLine = true,
+                    modifier = Modifier.fillMaxWidth(),
+                )
+
+                onDelete?.let {
+                    TextButton(onClick = it) {
+                        Text("Ta bort aktiviteten", color = MaterialTheme.colorScheme.error)
+                    }
+                }
+            }
+        },
+        confirmButton = {
+            Button(
+                onClick = {
+                    val type = selectedType ?: return@Button
+                    onSave(
+                        type,
+                        LocalDateTime.of(date, time),
+                        durationSeconds,
+                        if (type.isDistanceBased) distance.trim().replace(',', '.').toDoubleOrNull() else null,
+                        if (type.isDistanceBased) elevation.trim().toDoubleOrNull() else null,
+                        if (!type.isDistanceBased) rpe.toInt().toDouble() else null,
+                        notes.trim().ifBlank { null },
+                    )
+                },
+                enabled = canSave,
+            ) { Text("Spara") }
+        },
+        dismissButton = {
+            TextButton(onClick = onDismiss) { Text("Avbryt") }
+        },
+    )
+}

app/src/main/java/eu/brassepc/fitnessdroid/ui/common/AppSettings.kt

@@ -0,0 +1,21 @@
+package eu.brassepc.fitnessdroid.ui.common
+
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.provider.Settings
+
+/**
+ * Öppna systemets inställningssida för appen — snabbvägen att slå på
+ * behörigheter (plats, Bluetooth, notiser) som nekats eller aldrig frågats.
+ */
+fun Context.openAppSettings() {
+    runCatching {
+        startActivity(
+            Intent(
+                Settings.ACTION_APPLICATION_DETAILS_SETTINGS,
+                Uri.fromParts("package", packageName, null),
+            ).addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+        )
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/ui/common/CalorieInfo.kt

@@ -0,0 +1,123 @@
+package eu.brassepc.fitnessdroid.ui.common
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+
+/** En rad i kaloriuträkningen: en övning med MET, tilldelad tid och kcal. */
+data class CalorieRow(
+    val name: String,
+    val metValue: Double?,
+    val seconds: Int,
+    val kcal: Double?,
+)
+
+/**
+ * Klient-side-uppskattning som speglar serverns ComputeCalories:
+ * passets tid fördelas jämnt över övningarna (tidssatta set utgör golv
+ * för sin övning) och per övning gäller kcal = MET × kroppsvikt × timmar.
+ */
+fun estimateCalories(
+    exercises: List<Triple<String, Double, Int>>, // (namn, MET, golv-sekunder från tidssatta set)
+    bodyWeightKg: Double?,
+    totalSeconds: Int,
+): Pair<Double?, List<CalorieRow>> {
+    if (exercises.isEmpty()) return null to emptyList()
+    val floorsSum = exercises.sumOf { it.third }
+    val leftover = (totalSeconds - floorsSum).coerceAtLeast(0)
+    val perAuto = leftover / exercises.size.toDouble()
+    val rows = exercises.map { (name, met, floor) ->
+        val sec = (floor + perAuto).toInt()
+        CalorieRow(
+            name = name,
+            metValue = met,
+            seconds = sec,
+            kcal = bodyWeightKg?.let { met * it * (sec / 3600.0) },
+        )
+    }
+    val total = if (bodyWeightKg == null) null else rows.sumOf { it.kcal ?: 0.0 }
+    return total to rows
+}
+
+@Composable
+fun CalorieInfoDialog(
+    rows: List<CalorieRow>,
+    bodyWeightKg: Double?,
+    totalKcal: Double?,
+    onDismiss: () -> Unit,
+) {
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text("Så räknas kalorierna") },
+        text = {
+            Column(
+                modifier = Modifier.verticalScroll(rememberScrollState()),
+                verticalArrangement = Arrangement.spacedBy(10.dp),
+            ) {
+                Text(
+                    "Per övning: kcal = MET × kroppsvikt (kg) × tid (timmar). " +
+                        "Passets tid fördelas jämnt över övningarna, men set med " +
+                        "uppmätt tid räknas alltid in i sin övning.",
+                    style = MaterialTheme.typography.bodyMedium,
+                )
+                if (bodyWeightKg == null) {
+                    Text(
+                        "Ingen kroppsvikt satt i profilen — därför kan inga " +
+                            "kalorier beräknas. Sätt den på webben under Profil.",
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.error,
+                    )
+                } else {
+                    Text(
+                        "Din kroppsvikt: ${bodyWeightKg.compact()} kg",
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+                rows.forEach { row ->
+                    Row(modifier = Modifier.fillMaxWidth()) {
+                        Column(modifier = Modifier.weight(1f)) {
+                            Text(row.name, style = MaterialTheme.typography.bodyMedium)
+                            Text(
+                                buildString {
+                                    append("MET ${row.metValue?.compact() ?: "?"}")
+                                    append(" · ${row.seconds / 60} min")
+                                },
+                                style = MaterialTheme.typography.bodySmall,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                            )
+                        }
+                        Text(
+                            row.kcal?.let { "${it.toInt()} kcal" } ?: "—",
+                            style = MaterialTheme.typography.bodyMedium,
+                        )
+                    }
+                }
+                if (totalKcal != null) {
+                    Row(modifier = Modifier.fillMaxWidth().padding(top = 4.dp)) {
+                        Text(
+                            "Totalt",
+                            style = MaterialTheme.typography.titleSmall,
+                            modifier = Modifier.weight(1f),
+                        )
+                        Text("${totalKcal.toInt()} kcal", style = MaterialTheme.typography.titleSmall)
+                    }
+                }
+            }
+        },
+        confirmButton = {
+            TextButton(onClick = onDismiss) { Text("Stäng") }
+        },
+    )
+}

app/src/main/java/eu/brassepc/fitnessdroid/ui/common/Format.kt

@@ -0,0 +1,18 @@
+package eu.brassepc.fitnessdroid.ui.common
+
+import eu.brassepc.fitnessdroid.data.HistorySet
+
+fun Double.compact(): String =
+    if (this % 1.0 == 0.0) toInt().toString() else "%.1f".format(this)
+
+/** "80 kg × 8 · RPE 8" — samma format överallt där set visas. */
+fun HistorySet.describe(): String = buildString {
+    weight?.let { append("${it.compact()} kg") }
+    reps?.let {
+        if (isNotEmpty()) append(" × $it") else append("$it reps")
+    }
+    durationSeconds?.let { if (isNotEmpty()) append(" · ${it}s") else append("${it}s") }
+    distanceMeters?.let { if (isNotEmpty()) append(" · ${it.compact()} m") else append("${it.compact()} m") }
+    rpe?.let { append(" · RPE ${it.compact()}") }
+    if (isWarmup) append(" · uppvärmning")
+}

app/src/main/java/eu/brassepc/fitnessdroid/ui/common/MuscleIcons.kt

@@ -0,0 +1,50 @@
+package eu.brassepc.fitnessdroid.ui.common
+
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.DirectionsRun
+import androidx.compose.material.icons.filled.Accessibility
+import androidx.compose.material.icons.filled.AirlineSeatLegroomExtra
+import androidx.compose.material.icons.filled.FavoriteBorder
+import androidx.compose.material.icons.filled.FitnessCenter
+import androidx.compose.material.icons.filled.FrontHand
+import androidx.compose.material.icons.filled.Grid4x4
+import androidx.compose.material.icons.filled.SportsGymnastics
+import androidx.compose.material.icons.filled.SportsMartialArts
+import androidx.compose.ui.graphics.vector.ImageVector
+
+/**
+ * Ikon per muskelgrupp. I första hand via serverns iconKey
+ * (API-tillägget MuscleGroup.iconKey), i andra hand namnheuristik.
+ */
+object MuscleIcons {
+
+    fun forKey(iconKey: String?): ImageVector? = when (iconKey?.lowercase()) {
+        "chest" -> Icons.Default.FitnessCenter
+        "back" -> Icons.Default.SportsGymnastics
+        "legs" -> Icons.Default.AirlineSeatLegroomExtra
+        "shoulders" -> Icons.Default.SportsMartialArts
+        "arms" -> Icons.Default.FrontHand
+        "core" -> Icons.Default.Grid4x4
+        "cardio" -> Icons.AutoMirrored.Filled.DirectionsRun
+        "fullbody" -> Icons.Default.Accessibility
+        else -> null
+    }
+
+    fun forGroupName(name: String?): ImageVector {
+        val n = name?.lowercase().orEmpty()
+        return when {
+            "bröst" in n || "chest" in n -> Icons.Default.FitnessCenter
+            "rygg" in n || "back" in n || "lat" in n -> Icons.Default.SportsGymnastics
+            "ben" in n || "leg" in n || "quad" in n || "vad" in n -> Icons.Default.AirlineSeatLegroomExtra
+            "axl" in n || "shoulder" in n || "delt" in n -> Icons.Default.SportsMartialArts
+            "arm" in n || "bicep" in n || "tricep" in n -> Icons.Default.FrontHand
+            "mage" in n || "core" in n || "abs" in n || "bål" in n -> Icons.Default.Grid4x4
+            "kondition" in n || "cardio" in n || "löp" in n -> Icons.AutoMirrored.Filled.DirectionsRun
+            "hel" in n || "full" in n -> Icons.Default.Accessibility
+            else -> Icons.Default.FavoriteBorder
+        }
+    }
+
+    fun resolve(iconKey: String?, groupName: String?): ImageVector =
+        forKey(iconKey) ?: forGroupName(groupName)
+}

app/src/main/java/eu/brassepc/fitnessdroid/ui/goals/GoalsScreen.kt

@@ -0,0 +1,280 @@
+package eu.brassepc.fitnessdroid.ui.goals
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.Delete
+import androidx.compose.material.icons.filled.Flag
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.FilterChip
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.LinearProgressIndicator
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.lifecycle.viewmodel.initializer
+import androidx.lifecycle.viewmodel.viewModelFactory
+import eu.brassepc.fitnessdroid.data.GoalProgress
+import eu.brassepc.fitnessdroid.data.GymApi
+import eu.brassepc.fitnessdroid.ui.appContainer
+import eu.brassepc.fitnessdroid.ui.common.compact
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.launch
+import java.time.DayOfWeek
+import java.time.LocalDate
+import java.time.ZoneId
+
+val GOAL_METRIC_LABELS = linkedMapOf(
+    "KCAL" to "Aktiva kalorier",
+    "GYM_SESSIONS" to "Gympass",
+    "ACTIVITIES" to "Aktiviteter",
+    "DISTANCE_KM" to "Distans (km)",
+    "STEPS" to "Steg",
+)
+
+val GOAL_PERIOD_LABELS = linkedMapOf(
+    "DAY" to "Per dag",
+    "WEEK" to "Per vecka",
+    "MONTH" to "Per månad",
+)
+
+fun goalValueText(value: Double, metric: String): String =
+    if (metric == "DISTANCE_KM") "${value.compact()} km" else "${value.toInt()}"
+
+class GoalsViewModel(private val gymApi: GymApi) : ViewModel() {
+    val goals = MutableStateFlow<List<GoalProgress>>(emptyList())
+    val message = MutableStateFlow<String?>(null)
+
+    init { load() }
+
+    fun load() {
+        viewModelScope.launch {
+            runCatching {
+                val zone = ZoneId.systemDefault()
+                val today = LocalDate.now()
+                goals.value = gymApi.goalsWithProgress(
+                    today.atStartOfDay(zone).toInstant().toString(),
+                    today.with(DayOfWeek.MONDAY).atStartOfDay(zone).toInstant().toString(),
+                    today.withDayOfMonth(1).atStartOfDay(zone).toInstant().toString(),
+                )
+            }.onFailure { message.value = "Kunde inte hämta målen — offline?" }
+        }
+    }
+
+    fun setGoal(metric: String, period: String, target: Double) {
+        viewModelScope.launch {
+            try {
+                gymApi.setGoal(metric, period, target)
+                message.value = if (target <= 0) "Målet borttaget" else "Målet sparat"
+                load()
+            } catch (e: Exception) {
+                message.value = "Kunde inte spara — offline?"
+            }
+        }
+    }
+
+    companion object {
+        val Factory: ViewModelProvider.Factory = viewModelFactory {
+            initializer { GoalsViewModel(appContainer().gymApi) }
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun GoalsScreen(
+    onBack: () -> Unit,
+    viewModel: GoalsViewModel = viewModel(factory = GoalsViewModel.Factory),
+) {
+    val goals by viewModel.goals.collectAsStateWithLifecycle()
+    val message by viewModel.message.collectAsStateWithLifecycle()
+
+    var metric by remember { mutableStateOf("KCAL") }
+    var period by remember { mutableStateOf("DAY") }
+    var target by remember { mutableStateOf("") }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = {
+                    Row(verticalAlignment = Alignment.CenterVertically) {
+                        Icon(
+                            Icons.Default.Flag,
+                            contentDescription = null,
+                            tint = MaterialTheme.colorScheme.primary,
+                        )
+                        Text("Mål", modifier = Modifier.padding(start = 8.dp))
+                    }
+                },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = "Tillbaka")
+                    }
+                },
+            )
+        },
+    ) { padding ->
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(padding)
+                .verticalScroll(rememberScrollState())
+                .padding(16.dp),
+            verticalArrangement = Arrangement.spacedBy(14.dp),
+        ) {
+            message?.let {
+                Text(
+                    it,
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+
+            if (goals.isNotEmpty()) {
+                Card(modifier = Modifier.fillMaxWidth()) {
+                    Column(
+                        modifier = Modifier.padding(16.dp),
+                        verticalArrangement = Arrangement.spacedBy(12.dp),
+                    ) {
+                        goals.forEach { g ->
+                            GoalRow(g, onRemove = { viewModel.setGoal(g.metric, g.period, 0.0) })
+                        }
+                    }
+                }
+            } else {
+                Text(
+                    "Inga mål satta än. Sätt t.ex. 10 000 steg per dag eller 3 gympass per vecka.",
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+
+            Card(modifier = Modifier.fillMaxWidth()) {
+                Column(
+                    modifier = Modifier.padding(16.dp),
+                    verticalArrangement = Arrangement.spacedBy(10.dp),
+                ) {
+                    Text("Sätt mål", style = MaterialTheme.typography.titleSmall)
+                    Row(horizontalArrangement = Arrangement.spacedBy(6.dp)) {
+                        GOAL_METRIC_LABELS.forEach { (key, label) ->
+                            if (key in listOf("KCAL", "GYM_SESSIONS")) {
+                                FilterChip(
+                                    selected = metric == key,
+                                    onClick = { metric = key },
+                                    label = { Text(label) },
+                                )
+                            }
+                        }
+                    }
+                    Row(horizontalArrangement = Arrangement.spacedBy(6.dp)) {
+                        GOAL_METRIC_LABELS.forEach { (key, label) ->
+                            if (key in listOf("ACTIVITIES", "DISTANCE_KM", "STEPS")) {
+                                FilterChip(
+                                    selected = metric == key,
+                                    onClick = { metric = key },
+                                    label = { Text(label) },
+                                )
+                            }
+                        }
+                    }
+                    if (metric == "STEPS") {
+                        Text(
+                            "Stegdata kommer i en senare version (Health Connect) — målet " +
+                                "kan sättas redan nu men står på 0 tills dess.",
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        )
+                    }
+                    Row(horizontalArrangement = Arrangement.spacedBy(6.dp)) {
+                        GOAL_PERIOD_LABELS.forEach { (key, label) ->
+                            FilterChip(
+                                selected = period == key,
+                                onClick = { period = key },
+                                label = { Text(label) },
+                            )
+                        }
+                    }
+                    OutlinedTextField(
+                        value = target,
+                        onValueChange = { target = it },
+                        label = { Text("Målvärde") },
+                        singleLine = true,
+                        keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Decimal),
+                        modifier = Modifier.fillMaxWidth(),
+                    )
+                    Button(
+                        onClick = {
+                            target.trim().replace(',', '.').toDoubleOrNull()?.let {
+                                viewModel.setGoal(metric, period, it)
+                                target = ""
+                            }
+                        },
+                        enabled = target.trim().replace(',', '.').toDoubleOrNull()?.let { it > 0 } == true,
+                        modifier = Modifier.fillMaxWidth(),
+                    ) { Text("Spara målet") }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun GoalRow(g: GoalProgress, onRemove: (() -> Unit)? = null) {
+    Column(verticalArrangement = Arrangement.spacedBy(4.dp)) {
+        Row(verticalAlignment = Alignment.CenterVertically) {
+            Text(
+                "${GOAL_METRIC_LABELS[g.metric] ?: g.metric} · ${
+                    (GOAL_PERIOD_LABELS[g.period] ?: g.period).lowercase()
+                }",
+                style = MaterialTheme.typography.titleSmall,
+                modifier = Modifier.weight(1f),
+            )
+            Text(
+                "${goalValueText(g.currentValue, g.metric)} / ${goalValueText(g.targetValue, g.metric)}",
+                style = MaterialTheme.typography.bodySmall,
+                color = if (g.currentValue >= g.targetValue) MaterialTheme.colorScheme.primary
+                else MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+            onRemove?.let {
+                IconButton(onClick = it) {
+                    Icon(
+                        Icons.Default.Delete,
+                        contentDescription = "Ta bort mål",
+                        tint = MaterialTheme.colorScheme.error,
+                    )
+                }
+            }
+        }
+        LinearProgressIndicator(
+            progress = { (g.currentValue / g.targetValue).toFloat().coerceIn(0f, 1f) },
+            modifier = Modifier.fillMaxWidth(),
+        )
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/ui/history/HistoryDetailScreen.kt

@@ -0,0 +1,245 @@
+package eu.brassepc.fitnessdroid.ui.history
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material3.Card
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.lifecycle.viewmodel.initializer
+import androidx.lifecycle.viewmodel.viewModelFactory
+import eu.brassepc.fitnessdroid.data.GymRepository
+import eu.brassepc.fitnessdroid.data.SessionDetail
+import eu.brassepc.fitnessdroid.data.SessionStats
+import eu.brassepc.fitnessdroid.ui.appContainer
+import eu.brassepc.fitnessdroid.ui.common.CalorieInfoDialog
+import eu.brassepc.fitnessdroid.ui.common.CalorieRow
+import eu.brassepc.fitnessdroid.ui.common.describe
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.launch
+
+sealed interface DetailUiState {
+    data object Loading : DetailUiState
+    data class Error(val message: String) : DetailUiState
+    data class Ready(
+        val detail: SessionDetail,
+        val stats: SessionStats?,
+        val bodyWeightKg: Double?,
+    ) : DetailUiState
+}
+
+class HistoryDetailViewModel(private val repo: GymRepository) : ViewModel() {
+    val uiState = MutableStateFlow<DetailUiState>(DetailUiState.Loading)
+    private var loadedId: Int? = null
+
+    fun load(id: Int) {
+        if (loadedId == id && uiState.value is DetailUiState.Ready) return
+        loadedId = id
+        uiState.value = DetailUiState.Loading
+        viewModelScope.launch {
+            uiState.value = try {
+                DetailUiState.Ready(
+                    detail = repo.fetchSessionDetail(id),
+                    stats = runCatching { repo.fetchSessionStats(id) }.getOrNull(),
+                    bodyWeightKg = repo.bodyWeightKg(),
+                )
+            } catch (e: Exception) {
+                DetailUiState.Error("Kunde inte hämta passet — offline?")
+            }
+        }
+    }
+
+    companion object {
+        val Factory: ViewModelProvider.Factory = viewModelFactory {
+            initializer { HistoryDetailViewModel(appContainer().gymRepository) }
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun HistoryDetailScreen(
+    sessionId: Int,
+    onBack: () -> Unit,
+    viewModel: HistoryDetailViewModel = viewModel(factory = HistoryDetailViewModel.Factory),
+) {
+    LaunchedEffect(sessionId) { viewModel.load(sessionId) }
+    val uiState by viewModel.uiState.collectAsStateWithLifecycle()
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = {
+                    Text((uiState as? DetailUiState.Ready)?.detail?.name ?: "Pass")
+                },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = "Tillbaka")
+                    }
+                },
+            )
+        },
+    ) { padding ->
+        when (val state = uiState) {
+            is DetailUiState.Loading -> {
+                Box(
+                    modifier = Modifier.fillMaxSize().padding(padding),
+                    contentAlignment = Alignment.Center,
+                ) { CircularProgressIndicator() }
+            }
+            is DetailUiState.Error -> {
+                Box(
+                    modifier = Modifier.fillMaxSize().padding(padding),
+                    contentAlignment = Alignment.Center,
+                ) {
+                    Text(state.message, color = MaterialTheme.colorScheme.onSurfaceVariant)
+                }
+            }
+            is DetailUiState.Ready -> {
+                val d = state.detail
+                val stats = state.stats
+                var showCalorieInfo by remember { mutableStateOf(false) }
+
+                if (showCalorieInfo && stats != null) {
+                    CalorieInfoDialog(
+                        rows = stats.breakdown.map {
+                            CalorieRow(
+                                name = it.name,
+                                metValue = it.metValue,
+                                seconds = it.allocatedSeconds ?: 0,
+                                kcal = it.estimatedCalories,
+                            )
+                        },
+                        bodyWeightKg = state.bodyWeightKg,
+                        totalKcal = stats.estimatedCalories,
+                        onDismiss = { showCalorieInfo = false },
+                    )
+                }
+
+                val kcalByName = remember(stats) {
+                    stats?.breakdown?.groupBy { it.name }?.mapValues { (_, v) ->
+                        ArrayDeque(v)
+                    } ?: emptyMap()
+                }
+
+                LazyColumn(
+                    modifier = Modifier.fillMaxSize().padding(padding),
+                    contentPadding = androidx.compose.foundation.layout.PaddingValues(16.dp),
+                    verticalArrangement = Arrangement.spacedBy(10.dp),
+                ) {
+                    item {
+                        Card(modifier = Modifier.fillMaxWidth()) {
+                            Column(modifier = Modifier.padding(14.dp)) {
+                                Text(
+                                    buildString {
+                                        append(d.date.take(10))
+                                        (d.durationMinutes ?: stats?.durationMinutes)?.let {
+                                            append("  ·  ")
+                                            append(if (it >= 60) "${it / 60}h ${it % 60}m" else "$it min")
+                                        }
+                                        if (stats != null) {
+                                            append("  ·  ${stats.totalSets} set · ${stats.totalVolumeKg.toInt()} kg volym")
+                                        }
+                                    },
+                                    style = MaterialTheme.typography.bodyMedium,
+                                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                )
+                                Row(verticalAlignment = Alignment.CenterVertically) {
+                                    Text(
+                                        (stats?.estimatedCalories ?: d.calories)
+                                            ?.let { "${it.toInt()} kcal" }
+                                            ?: "Inga kalorier (kroppsvikt saknas)",
+                                        style = MaterialTheme.typography.titleMedium,
+                                        modifier = Modifier.weight(1f),
+                                    )
+                                    if (stats != null) {
+                                        TextButton(onClick = { showCalorieInfo = true }) {
+                                            Text("Hur räknas detta?")
+                                        }
+                                    }
+                                }
+                                d.notes?.takeIf { it.isNotBlank() }?.let {
+                                    Text(it, style = MaterialTheme.typography.bodyMedium)
+                                }
+                            }
+                        }
+                    }
+                    items(d.exercises) { exercise ->
+                        val exerciseKcal = kcalByName[exercise.name]?.removeFirstOrNull()
+                        Card(modifier = Modifier.fillMaxWidth()) {
+                            Column(
+                                modifier = Modifier.padding(14.dp),
+                                verticalArrangement = Arrangement.spacedBy(6.dp),
+                            ) {
+                                Row {
+                                    Text(
+                                        exercise.name,
+                                        style = MaterialTheme.typography.titleSmall,
+                                        modifier = Modifier.weight(1f),
+                                    )
+                                    exerciseKcal?.estimatedCalories?.let {
+                                        Text(
+                                            "${it.toInt()} kcal",
+                                            style = MaterialTheme.typography.labelLarge,
+                                            color = MaterialTheme.colorScheme.primary,
+                                        )
+                                    }
+                                }
+                                exercise.sets.forEach { set ->
+                                    Row {
+                                        Text(
+                                            "Set ${set.order}",
+                                            style = MaterialTheme.typography.bodySmall,
+                                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                            modifier = Modifier.padding(end = 10.dp),
+                                        )
+                                        Text(
+                                            set.describe(),
+                                            style = MaterialTheme.typography.bodySmall,
+                                        )
+                                    }
+                                }
+                                if (exercise.sets.isEmpty()) {
+                                    Text(
+                                        "Inga set loggade",
+                                        style = MaterialTheme.typography.bodySmall,
+                                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                    )
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/ui/history/HistoryScreen.kt

@@ -0,0 +1,145 @@
+package eu.brassepc.fitnessdroid.ui.history
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.lifecycle.viewmodel.initializer
+import androidx.lifecycle.viewmodel.viewModelFactory
+import eu.brassepc.fitnessdroid.data.GymRepository
+import eu.brassepc.fitnessdroid.data.HistoryItem
+import eu.brassepc.fitnessdroid.ui.appContainer
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.launch
+
+sealed interface HistoryUiState {
+    data object Loading : HistoryUiState
+    data class Error(val message: String) : HistoryUiState
+    data class Ready(val items: List<HistoryItem>) : HistoryUiState
+}
+
+class HistoryViewModel(private val repo: GymRepository) : ViewModel() {
+    val uiState = MutableStateFlow<HistoryUiState>(HistoryUiState.Loading)
+
+    init { load() }
+
+    fun load() {
+        uiState.value = HistoryUiState.Loading
+        viewModelScope.launch {
+            uiState.value = try {
+                HistoryUiState.Ready(repo.fetchHistory())
+            } catch (e: Exception) {
+                HistoryUiState.Error("Kunde inte hämta historiken — offline?")
+            }
+        }
+    }
+
+    companion object {
+        val Factory: ViewModelProvider.Factory = viewModelFactory {
+            initializer { HistoryViewModel(appContainer().gymRepository) }
+        }
+    }
+}
+
+@OptIn(androidx.compose.material3.ExperimentalMaterial3Api::class)
+@Composable
+fun HistoryScreen(
+    onOpenSession: (Int) -> Unit,
+    viewModel: HistoryViewModel = viewModel(factory = HistoryViewModel.Factory),
+) {
+    val uiState by viewModel.uiState.collectAsStateWithLifecycle()
+
+    when (val state = uiState) {
+        is HistoryUiState.Loading -> {
+            Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
+                CircularProgressIndicator()
+            }
+        }
+        is HistoryUiState.Error -> {
+            Column(
+                modifier = Modifier.fillMaxSize().padding(24.dp),
+                horizontalAlignment = Alignment.CenterHorizontally,
+                verticalArrangement = Arrangement.Center,
+            ) {
+                Text(state.message, color = MaterialTheme.colorScheme.onSurfaceVariant)
+                Button(onClick = viewModel::load, modifier = Modifier.padding(top = 12.dp)) {
+                    Text("Försök igen")
+                }
+            }
+        }
+        is HistoryUiState.Ready -> {
+            LazyColumn(
+                modifier = Modifier.fillMaxSize(),
+                contentPadding = androidx.compose.foundation.layout.PaddingValues(16.dp),
+                verticalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                item {
+                    Text("Passhistorik", style = MaterialTheme.typography.headlineSmall)
+                }
+                items(state.items, key = { it.id }) { item ->
+                    Card(
+                        onClick = { onOpenSession(item.id) },
+                        modifier = Modifier.fillMaxWidth(),
+                    ) {
+                        Column(modifier = Modifier.padding(14.dp)) {
+                            Row {
+                                Text(
+                                    item.name,
+                                    style = MaterialTheme.typography.titleSmall,
+                                    modifier = Modifier.weight(1f),
+                                )
+                                Text(
+                                    item.date.take(10),
+                                    style = MaterialTheme.typography.labelSmall,
+                                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                )
+                            }
+                            Text(
+                                buildString {
+                                    item.durationMinutes?.let {
+                                        append(if (it >= 60) "${it / 60}h ${it % 60}m" else "$it min")
+                                        append(" · ")
+                                    }
+                                    append("${item.exerciseCount} övningar · ${item.setCount} set")
+                                    if (item.volumeKg > 0) append(" · ${item.volumeKg.toInt()} kg volym")
+                                    item.calories?.let { append(" · ${it.toInt()} kcal") }
+                                },
+                                style = MaterialTheme.typography.bodySmall,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                modifier = Modifier.padding(top = 4.dp),
+                            )
+                        }
+                    }
+                }
+                if (state.items.isEmpty()) {
+                    item {
+                        Text(
+                            "Inga avslutade pass än — dags att ändra på det!",
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        )
+                    }
+                }
+            }
+        }
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/ui/home/HomeScreen.kt

@@ -1,23 +1,35 @@
 package eu.brassepc.fitnessdroid.ui.home
 
+import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
-import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyRow
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.automirrored.filled.Logout
+import androidx.compose.material.icons.filled.Bedtime
+import androidx.compose.material.icons.filled.CloudDone
+import androidx.compose.material.icons.filled.CloudOff
+import androidx.compose.material.icons.filled.CloudUpload
+import androidx.compose.material.icons.filled.Favorite
+import androidx.compose.material.icons.filled.FitnessCenter
+import androidx.compose.material.icons.filled.Flag
+import androidx.compose.material.icons.filled.LocalFireDepartment
+import androidx.compose.material.icons.filled.PhoneAndroid
+import androidx.compose.material.icons.filled.PlayArrow
+import androidx.compose.material.icons.filled.Star
+import androidx.compose.material.icons.filled.SystemUpdate
+import androidx.compose.material3.AssistChip
 import androidx.compose.material3.Button
 import androidx.compose.material3.Card
-import androidx.compose.material3.CenterAlignedTopAppBar
-import androidx.compose.material3.CircularProgressIndicator
-import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
-import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
@@ -26,95 +38,392 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
+import eu.brassepc.fitnessdroid.data.SyncStatus
 
-@OptIn(ExperimentalMaterial3Api::class)
 @Composable
-fun HomeScreen(viewModel: HomeViewModel = viewModel(factory = HomeViewModel.Factory)) {
+fun HomeScreen(
+    onOpenSession: () -> Unit,
+    onOpenHistory: () -> Unit,
+    onOpenActivities: () -> Unit = {},
+    onOpenTrack: (Int) -> Unit = {},
+    onOpenGoals: () -> Unit = {},
+    viewModel: HomeViewModel = viewModel(factory = HomeViewModel.Factory),
+) {
     val uiState by viewModel.uiState.collectAsStateWithLifecycle()
+    val updateState by viewModel.updateState.collectAsStateWithLifecycle()
+    val displayName by viewModel.displayName.collectAsStateWithLifecycle()
+    val kcalToday by viewModel.kcalToday.collectAsStateWithLifecycle()
+    val goals by viewModel.goals.collectAsStateWithLifecycle()
+
+    // ViewModellen överlever i navigationsstacken — hämta om dagens kcal
+    // varje gång skärmen kommer tillbaka (t.ex. efter loggad aktivitet).
+    androidx.compose.runtime.LaunchedEffect(Unit) { viewModel.refresh() }
 
-    Scaffold(
-        topBar = {
-            CenterAlignedTopAppBar(
-                title = { Text("FitnessDroid") },
-                actions = {
-                    IconButton(onClick = viewModel::logout) {
-                        Icon(
-                            imageVector = Icons.AutoMirrored.Filled.Logout,
-                            contentDescription = "Logga ut",
-                        )
-                    }
-                },
-            )
-        },
-    ) { padding ->
-        when (val state = uiState) {
-            is HomeUiState.Loading -> {
-                Box(
-                    modifier = Modifier
-                        .fillMaxSize()
-                        .padding(padding),
-                    contentAlignment = Alignment.Center,
-                ) {
-                    CircularProgressIndicator()
-                }
-            }
-            is HomeUiState.Error -> {
     Column(
         modifier = Modifier
             .fillMaxSize()
-                        .padding(padding)
-                        .padding(24.dp),
-                    horizontalAlignment = Alignment.CenterHorizontally,
-                    verticalArrangement = Arrangement.Center,
-                ) {
-                    Text(state.message, color = MaterialTheme.colorScheme.error)
-                    Button(onClick = viewModel::load, modifier = Modifier.padding(top = 16.dp)) {
-                        Text("Försök igen")
-                    }
-                }
-            }
-            is HomeUiState.Ready -> {
-                Column(
-                    modifier = Modifier
-                        .fillMaxSize()
-                        .padding(padding)
+            .verticalScroll(rememberScrollState())
             .padding(16.dp),
         verticalArrangement = Arrangement.spacedBy(16.dp),
     ) {
+        Row(verticalAlignment = Alignment.CenterVertically) {
+            Column(modifier = Modifier.weight(1f)) {
                 Text(
-                        "Hej ${state.profile.displayName ?: state.profile.username}!",
+                    "Tjena ${displayName ?: uiState.username}",
                     style = MaterialTheme.typography.headlineSmall,
                 )
+                Text(
+                    "Redo för ett pass?",
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+            SyncChip(status = uiState.syncStatus, pending = uiState.pendingCount)
+        }
+
+        KcalTodayCard(kcalToday)
+
+        Card(
+            modifier = Modifier
+                .fillMaxWidth()
+                .clickable(onClick = onOpenGoals),
+        ) {
+            Column(
+                modifier = Modifier.padding(16.dp),
+                verticalArrangement = Arrangement.spacedBy(10.dp),
+            ) {
+                Row(verticalAlignment = Alignment.CenterVertically) {
+                    Icon(
+                        Icons.Default.Flag,
+                        contentDescription = null,
+                        tint = MaterialTheme.colorScheme.primary,
+                    )
+                    Text(
+                        "Mål",
+                        style = MaterialTheme.typography.titleSmall,
+                        modifier = Modifier.weight(1f).padding(start = 8.dp),
+                    )
+                    Text(
+                        if (goals.isEmpty()) "Sätt mål →" else "Ändra →",
+                        style = MaterialTheme.typography.labelMedium,
+                        color = MaterialTheme.colorScheme.primary,
+                    )
+                }
+                goals.forEach { g -> eu.brassepc.fitnessdroid.ui.goals.GoalRow(g) }
+                if (goals.isEmpty()) {
+                    Text(
+                        "Kalorier, pass, aktiviteter eller km — per dag, vecka eller månad.",
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+        }
+
+        val trackingState by eu.brassepc.fitnessdroid.data.TrackingService.state.collectAsStateWithLifecycle()
+        if (trackingState.isActive) {
+            Card(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .clickable { onOpenTrack(trackingState.typeId) },
+            ) {
+                Row(
+                    modifier = Modifier.padding(16.dp),
+                    verticalAlignment = Alignment.CenterVertically,
+                ) {
+                    Icon(
+                        Icons.Default.Favorite,
+                        contentDescription = null,
+                        tint = MaterialTheme.colorScheme.primary,
+                    )
+                    Column(modifier = Modifier.weight(1f).padding(start = 10.dp)) {
+                        Text(
+                            "${trackingState.typeName} pågår",
+                            style = MaterialTheme.typography.titleSmall,
+                        )
+                        Text(
+                            buildString {
+                                val s = trackingState.elapsedSeconds
+                                append("%d:%02d".format(s / 60, s % 60))
+                                if (trackingState.isDistanceBased) {
+                                    append(" · ${"%.2f".format(trackingState.distanceMeters / 1000)} km")
+                                }
+                            },
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        )
+                    }
+                }
+            }
+        }
+
+        updateState?.let { update ->
+            Card(modifier = Modifier.fillMaxWidth()) {
+                Row(
+                    modifier = Modifier.padding(14.dp),
+                    verticalAlignment = Alignment.CenterVertically,
+                ) {
+                    Icon(
+                        Icons.Default.SystemUpdate,
+                        contentDescription = null,
+                        tint = MaterialTheme.colorScheme.primary,
+                    )
+                    Column(modifier = Modifier.weight(1f).padding(start = 10.dp)) {
+                        when (update) {
+                            is UpdateState.Available -> {
+                                Text(
+                                    "Ny version: ${update.info.versionName}",
+                                    style = MaterialTheme.typography.titleSmall,
+                                )
+                                Text(
+                                    "Laddas ner från släppsidan och installeras ovanpå",
+                                    style = MaterialTheme.typography.bodySmall,
+                                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                )
+                            }
+                            is UpdateState.Downloading -> {
+                                Text("Laddar ner …", style = MaterialTheme.typography.titleSmall)
+                                androidx.compose.material3.LinearProgressIndicator(
+                                    progress = { update.progress },
+                                    modifier = Modifier.fillMaxWidth().padding(top = 6.dp),
+                                )
+                            }
+                            is UpdateState.Failed -> {
+                                Text(
+                                    update.message,
+                                    style = MaterialTheme.typography.titleSmall,
+                                    color = MaterialTheme.colorScheme.error,
+                                )
+                            }
+                        }
+                    }
+                    if (update !is UpdateState.Downloading) {
+                        Button(onClick = viewModel::startUpdate) {
+                            Text(if (update is UpdateState.Failed) "Igen" else "Uppdatera")
+                        }
+                    }
+                }
+            }
+        }
+
+        if (uiState.hasActiveSession) {
+            Card(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .clickable(onClick = onOpenSession),
+            ) {
+                Row(
+                    modifier = Modifier.padding(16.dp),
+                    verticalAlignment = Alignment.CenterVertically,
+                ) {
+                    Icon(
+                        Icons.Default.PlayArrow,
+                        contentDescription = null,
+                        tint = MaterialTheme.colorScheme.primary,
+                    )
+                    Text(
+                        "Pass pågår — tryck för att fortsätta",
+                        modifier = Modifier.padding(start = 10.dp),
+                        style = MaterialTheme.typography.titleSmall,
+                    )
+                }
+            }
+        } else {
+            Button(
+                onClick = { viewModel.startFree(onOpenSession) },
+                modifier = Modifier.fillMaxWidth(),
+            ) {
+                Icon(Icons.Default.PlayArrow, contentDescription = null)
+                Text("Starta fritt pass", modifier = Modifier.padding(start = 6.dp))
+            }
+        }
+
+        if (uiState.startCards.isNotEmpty()) {
+            Text("Favoritpass & mallar", style = MaterialTheme.typography.titleMedium)
+            LazyRow(horizontalArrangement = Arrangement.spacedBy(10.dp)) {
+                items(uiState.startCards, key = { it.key }) { card ->
+                    Card(
+                        modifier = Modifier
+                            .width(170.dp)
+                            .clickable(enabled = !uiState.hasActiveSession) {
+                                viewModel.startFromCard(card, onOpenSession)
+                            },
+                    ) {
+                        Column(modifier = Modifier.padding(12.dp)) {
+                            Row(verticalAlignment = Alignment.CenterVertically) {
+                                Icon(
+                                    Icons.Default.Star,
+                                    contentDescription = null,
+                                    tint = MaterialTheme.colorScheme.tertiary,
+                                    modifier = Modifier.padding(end = 6.dp),
+                                )
+                                Text(
+                                    card.title,
+                                    style = MaterialTheme.typography.titleSmall,
+                                    maxLines = 1,
+                                )
+                            }
+                            Text(
+                                card.subtitle,
+                                style = MaterialTheme.typography.bodySmall,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                modifier = Modifier.padding(top = 4.dp),
+                            )
+                            Text(
+                                if (uiState.hasActiveSession) "Pass pågår" else "▶ Starta",
+                                style = MaterialTheme.typography.labelLarge,
+                                color = MaterialTheme.colorScheme.primary,
+                                modifier = Modifier.padding(top = 10.dp),
+                            )
+                        }
+                    }
+                }
+            }
+        }
+
+        Card(
+            modifier = Modifier
+                .fillMaxWidth()
+                .clickable(onClick = onOpenActivities),
+        ) {
+            Row(
+                modifier = Modifier.padding(16.dp),
+                verticalAlignment = Alignment.CenterVertically,
+            ) {
+                Icon(
+                    Icons.Default.Favorite,
+                    contentDescription = null,
+                    tint = MaterialTheme.colorScheme.primary,
+                )
+                Column(modifier = Modifier.weight(1f).padding(start = 12.dp)) {
+                    Text("Aktiviteter", style = MaterialTheme.typography.titleSmall)
+                    Text(
+                        "Promenad, löpning, fäktning — logga och se historik",
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+        }
+
+        AssistChip(
+            onClick = onOpenHistory,
+            label = { Text("Passhistorik") },
+        )
+    }
+}
+
+/** Dagens kaloriförbränning — aktivt loggat / telefon / passivt (BMR). */
+@Composable
+private fun KcalTodayCard(kcal: KcalToday) {
     Card(modifier = Modifier.fillMaxWidth()) {
         Column(
             modifier = Modifier.padding(16.dp),
             verticalArrangement = Arrangement.spacedBy(8.dp),
         ) {
-                            Text("Profil", style = MaterialTheme.typography.titleMedium)
-                            ProfileRow("Användarnamn", state.profile.username)
-                            state.profile.email?.let { ProfileRow("E-post", it) }
-                            state.profile.bodyWeightKg?.let { ProfileRow("Kroppsvikt", "$it kg") }
-                        }
-                    }
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                Icon(
+                    Icons.Default.LocalFireDepartment,
+                    contentDescription = null,
+                    tint = MaterialTheme.colorScheme.primary,
+                )
                 Text(
-                        "Pass, loggning, statistik och PB kommer i nästa steg.",
-                        style = MaterialTheme.typography.bodyMedium,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    "Dagens kalorier",
+                    style = MaterialTheme.typography.titleSmall,
+                    modifier = Modifier.weight(1f).padding(start = 8.dp),
+                )
+                Text(
+                    "${kcal.totalKcal.toInt()} kcal",
+                    style = MaterialTheme.typography.headlineSmall,
+                    color = MaterialTheme.colorScheme.primary,
                 )
             }
+
+            KcalRow(
+                icon = Icons.Default.FitnessCenter,
+                label = "Aktivt loggat",
+                value = "${kcal.activeKcal.toInt()} kcal",
+            )
+            KcalRow(
+                icon = Icons.Default.PhoneAndroid,
+                label = "Telefonen (steg)",
+                value = when {
+                    kcal.phoneKcal != null ->
+                        "${kcal.phoneKcal.toInt()} kcal" +
+                            (kcal.steps?.let { " · $it steg" } ?: "")
+                    kcal.steps != null -> "${kcal.steps} steg"
+                    else -> "aktivera i inställningarna"
+                },
+                dimValue = kcal.phoneKcal == null && kcal.steps == null,
+            )
+            KcalRow(
+                icon = Icons.Default.Bedtime,
+                label = "Passivt (BMR)",
+                value = kcal.passiveKcalSoFar?.let {
+                    "${it.toInt()} kcal · ${kcal.bmrPerDay?.toInt()} vid midnatt"
+                } ?: "—",
+            )
+
+            if (!kcal.hasBodyData) {
+                Text(
+                    "Fyll i vikt + kroppsdata (längd/födelseår/kön) i profilen " +
+                        "så kan den passiva förbränningen räknas ut.",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
             }
         }
     }
 }
 
 @Composable
-private fun ProfileRow(label: String, value: String) {
-    Row(modifier = Modifier.fillMaxWidth()) {
+private fun KcalRow(
+    icon: androidx.compose.ui.graphics.vector.ImageVector,
+    label: String,
+    value: String,
+    dimValue: Boolean = false,
+) {
+    Row(verticalAlignment = Alignment.CenterVertically) {
+        Icon(
+            icon,
+            contentDescription = null,
+            tint = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.padding(end = 8.dp),
+        )
         Text(
             label,
-            modifier = Modifier.weight(1f),
+            style = MaterialTheme.typography.bodySmall,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.weight(1f),
+        )
+        Text(
+            value,
+            style = MaterialTheme.typography.bodySmall,
+            color = if (dimValue) MaterialTheme.colorScheme.onSurfaceVariant
+            else MaterialTheme.colorScheme.onSurface,
+        )
+    }
+}
+
+@Composable
+private fun SyncChip(status: SyncStatus, pending: Int) {
+    val (icon, text) = when {
+        status == SyncStatus.OFFLINE -> Icons.Default.CloudOff to "Offline · $pending väntar"
+        status == SyncStatus.ERROR -> Icons.Default.CloudOff to "Synkfel"
+        pending > 0 -> Icons.Default.CloudUpload to "$pending osynkat"
+        else -> Icons.Default.CloudDone to "Synkat"
+    }
+    Row(verticalAlignment = Alignment.CenterVertically) {
+        Icon(
+            icon,
+            contentDescription = text,
+            tint = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.padding(end = 4.dp),
+        )
+        Text(
+            text,
+            style = MaterialTheme.typography.labelSmall,
             color = MaterialTheme.colorScheme.onSurfaceVariant,
         )
-        Text(value)
     }
 }

app/src/main/java/eu/brassepc/fitnessdroid/ui/home/HomeViewModel.kt

@@ -6,54 +6,214 @@ import androidx.lifecycle.viewModelScope
 import androidx.lifecycle.viewmodel.initializer
 import androidx.lifecycle.viewmodel.viewModelFactory
 import eu.brassepc.fitnessdroid.data.AuthRepository
-import eu.brassepc.fitnessdroid.data.GraphQlException
-import eu.brassepc.fitnessdroid.data.GymApi
-import eu.brassepc.fitnessdroid.data.Profile
+import eu.brassepc.fitnessdroid.data.AuthState
+import eu.brassepc.fitnessdroid.data.GymRepository
+import eu.brassepc.fitnessdroid.data.SyncStatus
+import eu.brassepc.fitnessdroid.data.local.CachedStartCard
 import eu.brassepc.fitnessdroid.ui.appContainer
-import kotlinx.coroutines.flow.MutableStateFlow
-import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.launch
 
-sealed interface HomeUiState {
-    data object Loading : HomeUiState
-    data class Error(val message: String) : HomeUiState
-    data class Ready(val profile: Profile) : HomeUiState
+data class HomeUiState(
+    val username: String = "",
+    val hasActiveSession: Boolean = false,
+    val startCards: List<CachedStartCard> = emptyList(),
+    val syncStatus: SyncStatus = SyncStatus.SYNCED,
+    val pendingCount: Int = 0,
+)
+
+sealed interface UpdateState {
+    data class Available(val info: eu.brassepc.fitnessdroid.data.UpdateInfo) : UpdateState
+    data class Downloading(val progress: Float) : UpdateState
+    data class Failed(val message: String) : UpdateState
+}
+
+/**
+ * Dagens kaloriförbränning, tredelad. Telefondelen (steg/auto-aktiviteter via
+ * Health Connect) kommer i en senare etapp och är null tills dess.
+ */
+data class KcalToday(
+    /** Aktivt loggat: gympass (och framöver aktiviteter) */
+    val activeKcal: Double = 0.0,
+    /** Passivt: BMR-andel av dygnet som gått */
+    val passiveKcalSoFar: Double? = null,
+    /** BMR för hela dygnet (för "i mål vid midnatt"-visning) */
+    val bmrPerDay: Double? = null,
+    /** Telefonens auto-loggade (steg) — via Health Connect */
+    val phoneKcal: Double? = null,
+    val steps: Int? = null,
+    /** false = längd/födelseår/kön saknas, mätaren kan inte räkna passivt */
+    val hasBodyData: Boolean = false,
+) {
+    val totalKcal: Double get() = activeKcal + (passiveKcalSoFar ?: 0.0) + (phoneKcal ?: 0.0)
 }
 
 class HomeViewModel(
-    private val gymApi: GymApi,
-    private val auth: AuthRepository,
+    private val repo: GymRepository,
+    auth: AuthRepository,
+    private val updateChecker: eu.brassepc.fitnessdroid.data.UpdateChecker,
+    private val gymApi: eu.brassepc.fitnessdroid.data.GymApi,
+    private val stepsSync: eu.brassepc.fitnessdroid.data.StepsSync,
 ) : ViewModel() {
 
-    private val _uiState = MutableStateFlow<HomeUiState>(HomeUiState.Loading)
-    val uiState: StateFlow<HomeUiState> = _uiState
+    val updateState = kotlinx.coroutines.flow.MutableStateFlow<UpdateState?>(null)
+
+    /** Helnamn från profilen — trevligare hälsning än användarnamnet. */
+    val displayName = kotlinx.coroutines.flow.MutableStateFlow<String?>(null)
+
+    val kcalToday = kotlinx.coroutines.flow.MutableStateFlow(KcalToday())
+    val goals = kotlinx.coroutines.flow.MutableStateFlow<List<eu.brassepc.fitnessdroid.data.GoalProgress>>(emptyList())
 
     init {
-        load()
+        viewModelScope.launch {
+            displayName.value = repo.displayName()
+            updateChecker.check()?.let { updateState.value = UpdateState.Available(it) }
+        }
+        viewModelScope.launch { refreshGoals() }
+        viewModelScope.launch {
+            refreshKcal()
+            // Passivdelen tickar med tiden — räkna om lokalt varje minut
+            // (nätverket rörs bara vid laddning).
+            while (true) {
+                kotlinx.coroutines.delay(60_000)
+                tickPassive()
+            }
+        }
     }
 
-    fun load() {
-        _uiState.value = HomeUiState.Loading
+    /** Uppdatera mätaren — anropas när hemskärmen visas (igen). */
+    fun refresh() {
+        viewModelScope.launch {
+            // Steg synkas först så att dailySummary/målen får färska värden
+            runCatching { stepsSync.syncThrottled() }
+            refreshKcal()
+            refreshGoals()
+        }
+    }
+
+    private suspend fun refreshGoals() {
+        runCatching {
+            val zone = java.time.ZoneId.systemDefault()
+            val today = java.time.LocalDate.now()
+            val day = today.atStartOfDay(zone).toInstant().toString()
+            val week = today.with(java.time.DayOfWeek.MONDAY).atStartOfDay(zone).toInstant().toString()
+            val month = today.withDayOfMonth(1).atStartOfDay(zone).toInstant().toString()
+            goals.value = gymApi.goalsWithProgress(day, week, month)
+        }
+    }
+
+    private fun secondsIntoToday(): Long = java.time.Duration.between(
+        java.time.LocalDate.now().atStartOfDay(), java.time.LocalDateTime.now()
+    ).seconds.coerceAtLeast(0)
+
+    private fun tickPassive() {
+        val current = kcalToday.value
+        kcalToday.value = current.copy(
+            passiveKcalSoFar = current.bmrPerDay?.let { it * secondsIntoToday() / 86_400.0 },
+        )
+    }
+
+    private suspend fun refreshKcal() {
+        // Serverns dailySummary är sanningen (gym + aktiviteter + BMR).
+        // Fallback: räkna själva mot äldre server utan aktiviteter.
+        val summary = runCatching {
+            val dayStart = java.time.LocalDate.now().atStartOfDay(java.time.ZoneId.systemDefault())
+            gymApi.dailySummary(dayStart.toInstant().toString())
+        }.getOrNull()
+
+        if (summary != null) {
+            kcalToday.value = KcalToday(
+                activeKcal = summary.activeKcal,
+                passiveKcalSoFar = summary.bmrKcalPerDay?.let { it * secondsIntoToday() / 86_400.0 },
+                bmrPerDay = summary.bmrKcalPerDay,
+                phoneKcal = summary.phoneKcal,
+                steps = summary.steps,
+                hasBodyData = summary.bmrKcalPerDay != null,
+            )
+            return
+        }
+
+        val today = java.time.LocalDate.now()
+        val active = runCatching {
+            repo.fetchHistory(limit = 15)
+                .filter { it.date.take(10) == today.toString() }
+                .sumOf { it.calories ?: 0.0 }
+        }.getOrElse { kcalToday.value.activeKcal }
+
+        val (bmr, hasBodyData) = runCatching {
+            val p = gymApi.myProfile()
+            val bmr = eu.brassepc.fitnessdroid.data.bmrKcalPerDay(
+                weightKg = p.bodyWeightKg,
+                heightCm = p.heightCm,
+                birthYear = p.birthYear,
+                isFemale = p.sex?.let { it == "female" },
+            )
+            bmr to (bmr != null)
+        }.getOrElse { kcalToday.value.bmrPerDay to kcalToday.value.hasBodyData }
+
+        kcalToday.value = KcalToday(
+            activeKcal = active,
+            passiveKcalSoFar = bmr?.let { it * secondsIntoToday() / 86_400.0 },
+            bmrPerDay = bmr,
+            phoneKcal = null,
+            hasBodyData = hasBodyData,
+        )
+    }
+
+    fun startUpdate() {
+        val info = (updateState.value as? UpdateState.Available)?.info ?: return
         viewModelScope.launch {
             try {
-                _uiState.value = HomeUiState.Ready(gymApi.myProfile())
-            } catch (e: GraphQlException) {
-                _uiState.value = HomeUiState.Error(e.message ?: "Något gick fel")
+                updateState.value = UpdateState.Downloading(0f)
+                val file = updateChecker.download(info) { p ->
+                    updateState.value = UpdateState.Downloading(p)
+                }
+                updateChecker.install(file)
+                // Tillbaka till "tillgänglig" om installationen avbryts.
+                updateState.value = UpdateState.Available(info)
             } catch (e: Exception) {
-                _uiState.value = HomeUiState.Error("Kunde inte nå servern")
+                updateState.value = UpdateState.Failed("Nedladdningen misslyckades — försök igen")
             }
         }
     }
 
-    fun logout() {
-        viewModelScope.launch { auth.logout() }
+    val uiState = combine(
+        repo.activeSession,
+        repo.startCards,
+        repo.syncStatus,
+        repo.pendingCount,
+        auth.state,
+    ) { session, cards, sync, pending, authState ->
+        HomeUiState(
+            username = (authState as? AuthState.LoggedIn)?.username ?: "",
+            hasActiveSession = session != null,
+            startCards = cards,
+            syncStatus = sync,
+            pendingCount = pending,
+        )
+    }.stateIn(viewModelScope, SharingStarted.WhileSubscribed(5000), HomeUiState())
+
+    fun startFree(onReady: () -> Unit) {
+        viewModelScope.launch {
+            repo.startFreeSession()
+            onReady()
+        }
+    }
+
+    fun startFromCard(card: CachedStartCard, onReady: () -> Unit) {
+        viewModelScope.launch {
+            repo.startFromCard(card)
+            onReady()
+        }
     }
 
     companion object {
         val Factory: ViewModelProvider.Factory = viewModelFactory {
             initializer {
-                val container = appContainer()
-                HomeViewModel(container.gymApi, container.authRepository)
+                val c = appContainer()
+                HomeViewModel(c.gymRepository, c.authRepository, c.updateChecker, c.gymApi, c.stepsSync)
             }
         }
     }

app/src/main/java/eu/brassepc/fitnessdroid/ui/picker/ExercisePickerScreen.kt

@@ -0,0 +1,208 @@
+package eu.brassepc.fitnessdroid.ui.picker
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.LazyRow
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.Search
+import androidx.compose.material.icons.filled.Star
+import androidx.compose.material.icons.filled.StarBorder
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.FilterChip
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.lifecycle.viewmodel.compose.viewModel
+import eu.brassepc.fitnessdroid.ui.common.MuscleIcons
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun ExercisePickerScreen(
+    onDone: () -> Unit,
+    viewModel: PickerViewModel = viewModel(factory = PickerViewModel.Factory),
+) {
+    val uiState by viewModel.uiState.collectAsStateWithLifecycle()
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text("Lägg till övning") },
+                navigationIcon = {
+                    IconButton(onClick = onDone) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = "Tillbaka")
+                    }
+                },
+            )
+        },
+    ) { padding ->
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(padding)
+                .padding(horizontal = 16.dp),
+            verticalArrangement = Arrangement.spacedBy(10.dp),
+        ) {
+            OutlinedTextField(
+                value = uiState.query,
+                onValueChange = viewModel::onQueryChange,
+                placeholder = { Text("Sök övning …") },
+                leadingIcon = { Icon(Icons.Default.Search, contentDescription = null) },
+                singleLine = true,
+                modifier = Modifier.fillMaxWidth(),
+            )
+
+            LazyRow(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                item {
+                    FilterChip(
+                        selected = uiState.selectedGroupId == null,
+                        onClick = { viewModel.selectGroup(null) },
+                        label = { Text("Alla") },
+                    )
+                }
+                items(uiState.groups, key = { it.id }) { group ->
+                    FilterChip(
+                        selected = uiState.selectedGroupId == group.id,
+                        onClick = { viewModel.selectGroup(group.id) },
+                        label = { Text(group.name) },
+                        leadingIcon = {
+                            Icon(
+                                MuscleIcons.resolve(group.iconKey, group.name),
+                                contentDescription = null,
+                                modifier = Modifier.size(16.dp),
+                            )
+                        },
+                    )
+                }
+            }
+
+            if (uiState.musclesInGroup.isNotEmpty()) {
+                LazyRow(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                    item {
+                        FilterChip(
+                            selected = uiState.selectedMuscleId == null,
+                            onClick = { viewModel.selectMuscle(null) },
+                            label = { Text("Alla i gruppen") },
+                        )
+                    }
+                    items(uiState.musclesInGroup, key = { it.id }) { muscle ->
+                        FilterChip(
+                            selected = uiState.selectedMuscleId == muscle.id,
+                            onClick = { viewModel.selectMuscle(muscle.id) },
+                            label = { Text(muscle.name) },
+                        )
+                    }
+                }
+            }
+
+            LazyColumn(
+                modifier = Modifier.weight(1f),
+                verticalArrangement = Arrangement.spacedBy(4.dp),
+            ) {
+                items(uiState.exercises, key = { it.id }) { row ->
+                    Surface(
+                        onClick = { viewModel.pick(row.id, onDone) },
+                        shape = MaterialTheme.shapes.medium,
+                        color = MaterialTheme.colorScheme.surface,
+                        modifier = Modifier.fillMaxWidth(),
+                    ) {
+                        Row(
+                            modifier = Modifier.padding(horizontal = 8.dp, vertical = 8.dp),
+                            verticalAlignment = Alignment.CenterVertically,
+                        ) {
+                            Surface(
+                                shape = CircleShape,
+                                color = MaterialTheme.colorScheme.surfaceVariant,
+                                modifier = Modifier.size(38.dp),
+                            ) {
+                                Box(contentAlignment = Alignment.Center) {
+                                    Icon(
+                                        row.icon,
+                                        contentDescription = null,
+                                        tint = MaterialTheme.colorScheme.primary,
+                                        modifier = Modifier.size(20.dp),
+                                    )
+                                }
+                            }
+                            Column(
+                                modifier = Modifier
+                                    .weight(1f)
+                                    .padding(horizontal = 10.dp),
+                            ) {
+                                Text(row.name, style = MaterialTheme.typography.titleSmall)
+                                Text(
+                                    row.subtitle,
+                                    style = MaterialTheme.typography.bodySmall,
+                                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                )
+                            }
+                            row.badges.forEach { badge ->
+                                Text(
+                                    badge,
+                                    style = MaterialTheme.typography.labelSmall,
+                                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                    modifier = Modifier.padding(start = 6.dp),
+                                )
+                            }
+                            IconButton(onClick = { viewModel.toggleFavorite(row.id, !row.favorite) }) {
+                                Icon(
+                                    if (row.favorite) Icons.Default.Star else Icons.Default.StarBorder,
+                                    contentDescription = "Favorit",
+                                    tint = if (row.favorite) {
+                                        MaterialTheme.colorScheme.tertiary
+                                    } else {
+                                        MaterialTheme.colorScheme.onSurfaceVariant
+                                    },
+                                )
+                            }
+                        }
+                    }
+                }
+                if (uiState.exercises.isEmpty()) {
+                    item {
+                        Column(
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .padding(16.dp),
+                            horizontalAlignment = Alignment.CenterHorizontally,
+                        ) {
+                            Text(
+                                if (uiState.query.isBlank() && uiState.selectedGroupId == null) {
+                                    "Övningslistan är tom — hämtar från servern …"
+                                } else {
+                                    "Inga övningar matchar — testa ett annat filter."
+                                },
+                                style = MaterialTheme.typography.bodyMedium,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                            )
+                            androidx.compose.material3.FilledTonalButton(
+                                onClick = viewModel::refresh,
+                                modifier = Modifier.padding(top = 12.dp),
+                            ) { Text("Uppdatera från servern") }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/ui/picker/PickerViewModel.kt

@@ -0,0 +1,142 @@
+package eu.brassepc.fitnessdroid.ui.picker
+
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.viewmodel.initializer
+import androidx.lifecycle.viewmodel.viewModelFactory
+import eu.brassepc.fitnessdroid.data.GymRepository
+import eu.brassepc.fitnessdroid.data.local.CachedMuscle
+import eu.brassepc.fitnessdroid.data.local.CachedMuscleGroup
+import eu.brassepc.fitnessdroid.ui.appContainer
+import eu.brassepc.fitnessdroid.ui.common.MuscleIcons
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.stateIn
+import kotlinx.coroutines.launch
+
+data class ExerciseRow(
+    val id: Int,
+    val name: String,
+    val subtitle: String,
+    val badges: List<String>,
+    val favorite: Boolean,
+    val icon: ImageVector,
+)
+
+data class PickerUiState(
+    val query: String = "",
+    val groups: List<CachedMuscleGroup> = emptyList(),
+    val musclesInGroup: List<CachedMuscle> = emptyList(),
+    val selectedGroupId: Int? = null,
+    val selectedMuscleId: Int? = null,
+    val exercises: List<ExerciseRow> = emptyList(),
+)
+
+class PickerViewModel(private val repo: GymRepository) : ViewModel() {
+
+    private val query = MutableStateFlow("")
+    private val selectedGroup = MutableStateFlow<Int?>(null)
+    private val selectedMuscle = MutableStateFlow<Int?>(null)
+
+    init {
+        // Tom cache (t.ex. första start eller misslyckad förra hämtning)?
+        // Försök fylla den direkt när väljaren öppnas.
+        viewModelScope.launch {
+            if (repo.exerciseTypes.first().isEmpty()) repo.refreshAllAsync()
+        }
+    }
+
+    fun refresh() = repo.refreshAllAsync()
+
+    private data class Filters(val query: String, val groupId: Int?, val muscleId: Int?)
+
+    private val filters = combine(query, selectedGroup, selectedMuscle) { q, g, m -> Filters(q, g, m) }
+
+    val uiState = combine(
+        repo.exerciseTypes,
+        repo.muscleGroups,
+        repo.muscles,
+        filters,
+    ) { types, groups, muscles, f ->
+        val musclesByGroup = muscles.groupBy { it.muscleGroupId }
+        val groupByMuscleId = muscles.associate { it.id to it.muscleGroupId }
+        val groupNameById = groups.associate { it.id to it.name }
+        val groupIconKeyById = groups.associate { it.id to it.iconKey }
+
+        val filtered = types.filter { t ->
+            val muscleIds = t.muscleIds.split(",").mapNotNull { it.trim().toIntOrNull() }
+            val inGroup = f.groupId == null ||
+                muscleIds.any { groupByMuscleId[it] == f.groupId }
+            val inMuscle = f.muscleId == null || f.muscleId in muscleIds
+            val matches = f.query.isBlank() || t.name.contains(f.query.trim(), ignoreCase = true)
+            inGroup && inMuscle && matches
+        }
+
+        PickerUiState(
+            query = f.query,
+            groups = groups,
+            musclesInGroup = f.groupId?.let { musclesByGroup[it] }.orEmpty(),
+            selectedGroupId = f.groupId,
+            selectedMuscleId = f.muscleId,
+            exercises = filtered.map { t ->
+                val muscleIds = t.muscleIds.split(",").mapNotNull { it.trim().toIntOrNull() }
+                val primaryGroupId = muscleIds.firstNotNullOfOrNull { groupByMuscleId[it] }
+                val groupNames = muscleIds.mapNotNull { groupByMuscleId[it] }
+                    .distinct().mapNotNull { groupNameById[it] }
+                ExerciseRow(
+                    id = t.id,
+                    name = t.name,
+                    subtitle = buildString {
+                        append(groupNames.joinToString(" · ").ifEmpty { "Övrigt" })
+                        t.lastWeight?.let { append("  ·  senast ${it.compact()} kg") }
+                    },
+                    badges = buildList {
+                        if (t.tracksWeight) add("KG")
+                        if (t.tracksReps) add("REPS")
+                        if (t.tracksDuration) add("TID")
+                        if (t.tracksDistance) add("M")
+                    },
+                    favorite = t.isFavorite,
+                    icon = MuscleIcons.resolve(
+                        primaryGroupId?.let { groupIconKeyById[it] },
+                        primaryGroupId?.let { groupNameById[it] },
+                    ),
+                )
+            },
+        )
+    }.stateIn(viewModelScope, SharingStarted.WhileSubscribed(5000), PickerUiState())
+
+    fun onQueryChange(value: String) { query.value = value }
+
+    fun selectGroup(id: Int?) {
+        selectedGroup.value = id
+        selectedMuscle.value = null
+    }
+
+    fun selectMuscle(id: Int?) { selectedMuscle.value = id }
+
+    fun toggleFavorite(exerciseTypeId: Int, favorite: Boolean) =
+        repo.toggleFavoriteExercise(exerciseTypeId, favorite)
+
+    fun pick(exerciseTypeId: Int, onDone: () -> Unit) {
+        viewModelScope.launch {
+            val sessionId = repo.activeSession.first()?.id ?: return@launch
+            repo.addExercise(sessionId, exerciseTypeId)
+            onDone()
+        }
+    }
+
+    companion object {
+        val Factory: ViewModelProvider.Factory = viewModelFactory {
+            initializer { PickerViewModel(appContainer().gymRepository) }
+        }
+    }
+}
+
+private fun Double.compact(): String =
+    if (this % 1.0 == 0.0) toInt().toString() else "%.1f".format(this)

app/src/main/java/eu/brassepc/fitnessdroid/ui/profile/ProfileScreen.kt

@@ -0,0 +1,624 @@
+package eu.brassepc.fitnessdroid.ui.profile
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.Logout
+import androidx.compose.material.icons.filled.Info
+import androidx.compose.material.icons.filled.MonitorWeight
+import androidx.compose.material.icons.filled.Settings
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.lifecycle.viewmodel.initializer
+import androidx.lifecycle.viewmodel.viewModelFactory
+import eu.brassepc.fitnessdroid.data.AuthRepository
+import eu.brassepc.fitnessdroid.data.BodyMeasurement
+import eu.brassepc.fitnessdroid.data.GymApi
+import eu.brassepc.fitnessdroid.data.GymRepository
+import eu.brassepc.fitnessdroid.data.Profile
+import eu.brassepc.fitnessdroid.ui.appContainer
+import eu.brassepc.fitnessdroid.ui.common.compact
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.launch
+
+class ProfileViewModel(
+    private val gymApi: GymApi,
+    private val auth: AuthRepository,
+    private val repo: GymRepository,
+    private val settingsStore: eu.brassepc.fitnessdroid.data.SettingsStore,
+) : ViewModel() {
+    val profile = MutableStateFlow<Profile?>(null)
+    val measurements = MutableStateFlow<List<BodyMeasurement>>(emptyList())
+    val message = MutableStateFlow<String?>(null)
+    val settings = settingsStore.settings
+
+    /** Kroppsdata sparas lokalt (för vågen/offline) och synkas till servern. */
+    fun saveBodyData(heightCm: Double?, birthYear: Int?, isFemale: Boolean?) {
+        viewModelScope.launch {
+            settingsStore.setBodyData(heightCm, birthYear, isFemale)
+            try {
+                // Tomt fält = rensa på servern (-1/"" är serverns konvention)
+                gymApi.updateProfile(
+                    heightCm = heightCm ?: -1.0,
+                    birthYear = birthYear ?: -1,
+                    sex = when (isFemale) {
+                        true -> "female"
+                        false -> "male"
+                        null -> ""
+                    },
+                )
+            } catch (e: Exception) {
+                message.value = "Kroppsdata sparad lokalt — kunde inte nå servern"
+            }
+        }
+    }
+
+    /**
+     * Håll lokala kroppsdatan i synk med servern: serverns värden vinner,
+     * men finns de bara lokalt (satta innan servern fick fälten) pushas de upp.
+     */
+    private suspend fun syncBodyData(p: Profile) {
+        val local = settingsStore.settings.first()
+        val serverHas = p.heightCm != null || p.birthYear != null || p.sex != null
+        val localHas = local.heightCm != null || local.birthYear != null || local.isFemale != null
+        if (serverHas) {
+            settingsStore.setBodyData(p.heightCm, p.birthYear, p.sex?.let { it == "female" })
+        } else if (localHas) {
+            runCatching {
+                gymApi.updateProfile(
+                    heightCm = local.heightCm,
+                    birthYear = local.birthYear,
+                    sex = local.isFemale?.let { if (it) "female" else "male" },
+                )
+            }
+        }
+    }
+
+    init { load() }
+
+    fun load() {
+        viewModelScope.launch {
+            runCatching {
+                val p = gymApi.myProfile()
+                profile.value = p
+                syncBodyData(p)
+            }
+            runCatching { measurements.value = repo.fetchBodyMeasurements().reversed() }
+        }
+    }
+
+    fun addWeight(weightKg: Double, dateIso: String?, muscle: Double?, fat: Double?, water: Double?) {
+        viewModelScope.launch {
+            try {
+                repo.addBodyMeasurement(weightKg, dateIso, muscle, fat, water)
+                message.value = "Vikten sparad"
+                load()
+            } catch (e: Exception) {
+                message.value = "Kunde inte spara — offline?"
+            }
+        }
+    }
+
+    fun updateMeasurement(
+        id: String, weightKg: Double, dateIso: String?,
+        muscle: Double?, fat: Double?, water: Double?,
+    ) {
+        viewModelScope.launch {
+            try {
+                // -1 rensar fältet på servern om användaren tömt det
+                repo.updateBodyMeasurement(
+                    id, weightKg, dateIso,
+                    muscle ?: -1.0, fat ?: -1.0, water ?: -1.0,
+                )
+                load()
+            } catch (e: Exception) {
+                message.value = "Kunde inte uppdatera — offline?"
+            }
+        }
+    }
+
+    fun deleteMeasurement(id: String) {
+        viewModelScope.launch {
+            try {
+                repo.deleteBodyMeasurement(id)
+                load()
+            } catch (e: Exception) {
+                message.value = "Kunde inte ta bort — offline?"
+            }
+        }
+    }
+
+    fun logout() {
+        viewModelScope.launch { auth.logout() }
+    }
+
+    companion object {
+        val Factory: ViewModelProvider.Factory = viewModelFactory {
+            initializer {
+                val c = appContainer()
+                ProfileViewModel(c.gymApi, c.authRepository, c.gymRepository, c.settingsStore)
+            }
+        }
+    }
+}
+
+@Composable
+fun ProfileScreen(
+    onOpenSettings: () -> Unit,
+    onOpenWeigh: () -> Unit = {},
+    onOpenAbout: () -> Unit = {},
+    viewModel: ProfileViewModel = viewModel(factory = ProfileViewModel.Factory),
+) {
+    val profile by viewModel.profile.collectAsStateWithLifecycle()
+    val measurements by viewModel.measurements.collectAsStateWithLifecycle()
+    val message by viewModel.message.collectAsStateWithLifecycle()
+    val settings by viewModel.settings.collectAsStateWithLifecycle(
+        eu.brassepc.fitnessdroid.data.AppSettings()
+    )
+    var showAddWeight by remember { mutableStateOf(false) }
+    var showBodyData by remember { mutableStateOf(false) }
+    var editTarget by remember { mutableStateOf<BodyMeasurement?>(null) }
+
+    if (showAddWeight) {
+        WeightDialog(
+            title = "Uppdatera kroppsvikt",
+            initial = profile?.bodyWeightKg,
+            initialDate = java.time.LocalDate.now(),
+            initialMuscle = null,
+            initialFat = null,
+            initialWater = null,
+            onSave = { weight, dateIso, muscle, fat, water ->
+                viewModel.addWeight(weight, dateIso, muscle, fat, water)
+                showAddWeight = false
+            },
+            onDismiss = { showAddWeight = false },
+        )
+    }
+
+    if (showBodyData) {
+        BodyDataDialog(
+            initialHeight = settings.heightCm,
+            initialBirthYear = settings.birthYear,
+            initialIsFemale = settings.isFemale,
+            onSave = { h, y, f ->
+                viewModel.saveBodyData(h, y, f)
+                showBodyData = false
+            },
+            onDismiss = { showBodyData = false },
+        )
+    }
+
+    editTarget?.let { m ->
+        WeightDialog(
+            title = "Rätta mätning",
+            initial = m.weightKg,
+            initialDate = runCatching { java.time.LocalDate.parse(m.date.take(10)) }
+                .getOrElse { java.time.LocalDate.now() },
+            initialMuscle = m.musclePercent,
+            initialFat = m.fatPercent,
+            initialWater = m.waterPercent,
+            onSave = { weight, dateIso, muscle, fat, water ->
+                viewModel.updateMeasurement(m.id, weight, dateIso, muscle, fat, water)
+                editTarget = null
+            },
+            onDelete = {
+                viewModel.deleteMeasurement(m.id)
+                editTarget = null
+            },
+            onDismiss = { editTarget = null },
+        )
+    }
+
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .verticalScroll(rememberScrollState())
+            .padding(16.dp),
+        verticalArrangement = Arrangement.spacedBy(14.dp),
+    ) {
+        Text("Profil", style = MaterialTheme.typography.headlineSmall)
+
+        Card(modifier = Modifier.fillMaxWidth()) {
+            Column(
+                modifier = Modifier.padding(16.dp),
+                verticalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                ProfileRow("Användarnamn", profile?.username ?: "…")
+                profile?.displayName?.let { ProfileRow("Namn", it) }
+                profile?.email?.let { ProfileRow("E-post", it) }
+            }
+        }
+
+        Card(modifier = Modifier.fillMaxWidth()) {
+            Column(
+                modifier = Modifier.padding(16.dp),
+                verticalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                Row(verticalAlignment = Alignment.CenterVertically) {
+                    Icon(
+                        Icons.Default.MonitorWeight,
+                        contentDescription = null,
+                        tint = MaterialTheme.colorScheme.primary,
+                    )
+                    Column(modifier = Modifier.weight(1f).padding(start = 10.dp)) {
+                        Text("Kroppsvikt", style = MaterialTheme.typography.titleSmall)
+                        Text(
+                            profile?.bodyWeightKg?.let { "${it.compact()} kg" } ?: "Inte satt",
+                            style = MaterialTheme.typography.headlineSmall,
+                        )
+                    }
+                    Button(onClick = { showAddWeight = true }) { Text("Uppdatera") }
+                }
+                if (settings.scaleAddress != null) {
+                    androidx.compose.material3.FilledTonalButton(
+                        onClick = onOpenWeigh,
+                        modifier = Modifier.fillMaxWidth(),
+                    ) {
+                        Icon(Icons.Default.MonitorWeight, contentDescription = null)
+                        Text("Väg dig med vågen", modifier = Modifier.padding(start = 8.dp))
+                    }
+                }
+                message?.let {
+                    Text(
+                        it,
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+                if (measurements.isNotEmpty()) {
+                    Text(
+                        "Historik (tryck för att rätta)",
+                        style = MaterialTheme.typography.labelSmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                    measurements.take(8).forEach { m ->
+                        Row(
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .clickable { editTarget = m }
+                                .padding(vertical = 4.dp),
+                        ) {
+                            Text(
+                                m.date.take(10),
+                                style = MaterialTheme.typography.bodySmall,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                modifier = Modifier.weight(1f),
+                            )
+                            val composition = listOfNotNull(
+                                m.musclePercent?.let { "M ${it.compact()}%" },
+                                m.fatPercent?.let { "F ${it.compact()}%" },
+                                m.waterPercent?.let { "V ${it.compact()}%" },
+                            ).joinToString(" · ")
+                            if (composition.isNotEmpty()) {
+                                Text(
+                                    composition,
+                                    style = MaterialTheme.typography.bodySmall,
+                                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                    modifier = Modifier.padding(end = 8.dp),
+                                )
+                            }
+                            Text(
+                                "${m.weightKg.compact()} kg",
+                                style = MaterialTheme.typography.bodySmall,
+                            )
+                        }
+                    }
+                }
+            }
+        }
+
+        Card(
+            modifier = Modifier
+                .fillMaxWidth()
+                .clickable { showBodyData = true },
+        ) {
+            Column(
+                modifier = Modifier.padding(16.dp),
+                verticalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                Text("Kroppsdata", style = MaterialTheme.typography.titleSmall)
+                Text(
+                    "Behövs för att vågen ska kunna räkna ut muskler/fett/vatten. " +
+                        "Tryck för att ändra.",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+                ProfileRow("Längd", settings.heightCm?.let { "${it.compact()} cm" } ?: "Inte satt")
+                ProfileRow("Födelseår", settings.birthYear?.toString() ?: "Inte satt")
+                ProfileRow(
+                    "Kön",
+                    when (settings.isFemale) {
+                        true -> "Kvinna"
+                        false -> "Man"
+                        null -> "Inte satt"
+                    },
+                )
+            }
+        }
+
+        Card(
+            modifier = Modifier
+                .fillMaxWidth()
+                .clickable(onClick = onOpenSettings),
+        ) {
+            Row(
+                modifier = Modifier.padding(16.dp),
+                verticalAlignment = Alignment.CenterVertically,
+            ) {
+                Icon(Icons.Default.Settings, contentDescription = null)
+                Column(modifier = Modifier.weight(1f).padding(start = 12.dp)) {
+                    Text("Inställningar", style = MaterialTheme.typography.titleSmall)
+                    Text(
+                        "Vilotimer, viktsteg, stänger, våg, inloggning",
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+        }
+
+        Card(
+            modifier = Modifier
+                .fillMaxWidth()
+                .clickable(onClick = onOpenAbout),
+        ) {
+            Row(
+                modifier = Modifier.padding(16.dp),
+                verticalAlignment = Alignment.CenterVertically,
+            ) {
+                Icon(Icons.Default.Info, contentDescription = null)
+                Column(modifier = Modifier.weight(1f).padding(start = 12.dp)) {
+                    Text("Om appen", style = MaterialTheme.typography.titleSmall)
+                    Text(
+                        "Version, licens (GPL-3.0) och öppen källkod",
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+        }
+
+        TextButton(onClick = viewModel::logout) {
+            Icon(Icons.AutoMirrored.Filled.Logout, contentDescription = null)
+            Text("Logga ut", modifier = Modifier.padding(start = 6.dp))
+        }
+    }
+}
+
+@OptIn(androidx.compose.material3.ExperimentalMaterial3Api::class)
+@Composable
+private fun WeightDialog(
+    title: String,
+    initial: Double?,
+    initialDate: java.time.LocalDate,
+    initialMuscle: Double?,
+    initialFat: Double?,
+    initialWater: Double?,
+    onSave: (Double, String?, Double?, Double?, Double?) -> Unit,
+    onDismiss: () -> Unit,
+    onDelete: (() -> Unit)? = null,
+) {
+    fun fmt(v: Double?) = v?.let { if (it % 1.0 == 0.0) it.toInt().toString() else it.toString() } ?: ""
+    var text by remember { mutableStateOf(fmt(initial)) }
+    var muscle by remember { mutableStateOf(fmt(initialMuscle)) }
+    var fat by remember { mutableStateOf(fmt(initialFat)) }
+    var water by remember { mutableStateOf(fmt(initialWater)) }
+    var date by remember { mutableStateOf(initialDate) }
+    var showDatePicker by remember { mutableStateOf(false) }
+    val parsed = text.trim().replace(',', '.').toDoubleOrNull()
+    fun pct(s: String) = s.trim().replace(',', '.').toDoubleOrNull()
+
+    if (showDatePicker) {
+        val dateState = androidx.compose.material3.rememberDatePickerState(
+            initialSelectedDateMillis = date.atStartOfDay(java.time.ZoneOffset.UTC)
+                .toInstant().toEpochMilli(),
+        )
+        androidx.compose.material3.DatePickerDialog(
+            onDismissRequest = { showDatePicker = false },
+            confirmButton = {
+                TextButton(onClick = {
+                    dateState.selectedDateMillis?.let { picked ->
+                        date = java.time.Instant.ofEpochMilli(picked)
+                            .atZone(java.time.ZoneOffset.UTC).toLocalDate()
+                    }
+                    showDatePicker = false
+                }) { Text("OK") }
+            },
+            dismissButton = {
+                TextButton(onClick = { showDatePicker = false }) { Text("Avbryt") }
+            },
+        ) {
+            androidx.compose.material3.DatePicker(state = dateState)
+        }
+    }
+
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text(title) },
+        text = {
+            Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
+                OutlinedTextField(
+                    value = text,
+                    onValueChange = { text = it },
+                    label = { Text("Vikt (kg)") },
+                    singleLine = true,
+                    keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Decimal),
+                    modifier = Modifier.fillMaxWidth(),
+                )
+                androidx.compose.material3.FilledTonalButton(
+                    onClick = { showDatePicker = true },
+                    modifier = Modifier.fillMaxWidth(),
+                ) {
+                    Text("Datum: $date")
+                }
+                Text(
+                    "Kroppssammansättning (valfritt)",
+                    style = MaterialTheme.typography.labelMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+                Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                    OutlinedTextField(
+                        value = muscle,
+                        onValueChange = { muscle = it },
+                        label = { Text("Muskel %") },
+                        singleLine = true,
+                        keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Decimal),
+                        modifier = Modifier.weight(1f),
+                    )
+                    OutlinedTextField(
+                        value = fat,
+                        onValueChange = { fat = it },
+                        label = { Text("Fett %") },
+                        singleLine = true,
+                        keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Decimal),
+                        modifier = Modifier.weight(1f),
+                    )
+                }
+                OutlinedTextField(
+                    value = water,
+                    onValueChange = { water = it },
+                    label = { Text("Vatten %") },
+                    singleLine = true,
+                    keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Decimal),
+                    modifier = Modifier.fillMaxWidth(),
+                )
+                onDelete?.let {
+                    TextButton(onClick = it) {
+                        Text("Ta bort mätningen", color = MaterialTheme.colorScheme.error)
+                    }
+                }
+            }
+        },
+        confirmButton = {
+            Button(
+                onClick = {
+                    parsed?.let { weight ->
+                        // Mitt på dagen UTC så datumet inte glider en dag i någon tidszon
+                        val iso = date.atTime(12, 0).atOffset(java.time.ZoneOffset.UTC)
+                            .toInstant().toString()
+                        onSave(weight, iso, pct(muscle), pct(fat), pct(water))
+                    }
+                },
+                enabled = parsed != null && parsed > 0,
+            ) { Text("Spara") }
+        },
+        dismissButton = {
+            TextButton(onClick = onDismiss) { Text("Avbryt") }
+        },
+    )
+}
+
+/** Längd/födelseår/kön — indata till BT-vågens kroppssammansättning. */
+@Composable
+private fun BodyDataDialog(
+    initialHeight: Double?,
+    initialBirthYear: Int?,
+    initialIsFemale: Boolean?,
+    onSave: (Double?, Int?, Boolean?) -> Unit,
+    onDismiss: () -> Unit,
+) {
+    fun fmt(v: Double?) = v?.let { if (it % 1.0 == 0.0) it.toInt().toString() else it.toString() } ?: ""
+    var height by remember { mutableStateOf(fmt(initialHeight)) }
+    var birthYear by remember { mutableStateOf(initialBirthYear?.toString() ?: "") }
+    var isFemale by remember { mutableStateOf(initialIsFemale) }
+
+    val parsedHeight = height.trim().replace(',', '.').toDoubleOrNull()
+    val parsedYear = birthYear.trim().toIntOrNull()
+    val currentYear = java.time.LocalDate.now().year
+    val yearOk = parsedYear == null || parsedYear in 1900..currentYear
+
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text("Kroppsdata") },
+        text = {
+            Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
+                Text(
+                    "Skickas till vågen så att den kan räkna ut muskler, fett och vatten.",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+                OutlinedTextField(
+                    value = height,
+                    onValueChange = { height = it },
+                    label = { Text("Längd (cm)") },
+                    singleLine = true,
+                    keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Decimal),
+                    modifier = Modifier.fillMaxWidth(),
+                )
+                OutlinedTextField(
+                    value = birthYear,
+                    onValueChange = { birthYear = it },
+                    label = { Text("Födelseår") },
+                    singleLine = true,
+                    isError = !yearOk,
+                    keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
+                    modifier = Modifier.fillMaxWidth(),
+                )
+                Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                    androidx.compose.material3.FilterChip(
+                        selected = isFemale == false,
+                        onClick = { isFemale = false },
+                        label = { Text("Man") },
+                        modifier = Modifier.weight(1f),
+                    )
+                    androidx.compose.material3.FilterChip(
+                        selected = isFemale == true,
+                        onClick = { isFemale = true },
+                        label = { Text("Kvinna") },
+                        modifier = Modifier.weight(1f),
+                    )
+                }
+            }
+        },
+        confirmButton = {
+            Button(
+                onClick = { onSave(parsedHeight, parsedYear, isFemale) },
+                enabled = yearOk,
+            ) { Text("Spara") }
+        },
+        dismissButton = {
+            TextButton(onClick = onDismiss) { Text("Avbryt") }
+        },
+    )
+}
+
+@Composable
+private fun ProfileRow(label: String, value: String) {
+    Row(modifier = Modifier.fillMaxWidth()) {
+        Text(
+            label,
+            modifier = Modifier.weight(1f),
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+        Text(value)
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/ui/scale/ScaleScreens.kt

@@ -0,0 +1,679 @@
+package eu.brassepc.fitnessdroid.ui.scale
+
+import android.Manifest
+import android.content.pm.PackageManager
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.Bluetooth
+import androidx.compose.material.icons.filled.BluetoothSearching
+import androidx.compose.material.icons.filled.CheckCircle
+import androidx.compose.material.icons.filled.Delete
+import androidx.compose.material.icons.filled.MonitorWeight
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.FilledTonalButton
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.core.content.ContextCompat
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.lifecycle.viewmodel.initializer
+import androidx.lifecycle.viewmodel.viewModelFactory
+import com.health.openscale.core.bluetooth.BluetoothEvent
+import com.health.openscale.core.bluetooth.data.ScaleMeasurement
+import com.health.openscale.core.service.ScannedDeviceInfo
+import eu.brassepc.fitnessdroid.data.AppSettings
+import eu.brassepc.fitnessdroid.data.GymRepository
+import eu.brassepc.fitnessdroid.data.ScaleManager
+import eu.brassepc.fitnessdroid.data.SettingsStore
+import eu.brassepc.fitnessdroid.ui.appContainer
+import eu.brassepc.fitnessdroid.ui.common.compact
+import eu.brassepc.fitnessdroid.ui.common.openAppSettings
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.stateIn
+import kotlinx.coroutines.launch
+
+/** Behörigheterna som BLE-skanning/anslutning kräver på Android 12+. */
+val BLE_PERMISSIONS = arrayOf(
+    Manifest.permission.BLUETOOTH_SCAN,
+    Manifest.permission.BLUETOOTH_CONNECT,
+)
+
+/* ==================== Anslut våg (parning) ==================== */
+
+class ScalePairViewModel(
+    private val scaleManager: ScaleManager,
+    private val settingsStore: SettingsStore,
+) : ViewModel() {
+    val settings = settingsStore.settings
+        .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5000), AppSettings())
+
+    val devices = scaleManager.scanner.scannedDevices
+    val isScanning = scaleManager.scanner.isScanning
+    val scanError = scaleManager.scanner.scanError
+
+    fun startScan() {
+        scaleManager.scanner.startScan(30_000)
+    }
+
+    fun stopScan() {
+        scaleManager.scanner.stopScan()
+    }
+
+    fun saveScale(device: ScannedDeviceInfo) {
+        viewModelScope.launch {
+            stopScan()
+            settingsStore.setScale(device.address, device.name, device.determinedHandlerDisplayName)
+        }
+    }
+
+    fun forgetScale() {
+        viewModelScope.launch { settingsStore.setScale(null, null, null) }
+    }
+
+    override fun onCleared() {
+        stopScan()
+    }
+
+    companion object {
+        val Factory: ViewModelProvider.Factory = viewModelFactory {
+            initializer {
+                val c = appContainer()
+                ScalePairViewModel(c.scaleManager, c.settingsStore)
+            }
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun ScalePairScreen(
+    onBack: () -> Unit,
+    viewModel: ScalePairViewModel = viewModel(factory = ScalePairViewModel.Factory),
+) {
+    val settings by viewModel.settings.collectAsStateWithLifecycle()
+    val devices by viewModel.devices.collectAsStateWithLifecycle()
+    val isScanning by viewModel.isScanning.collectAsStateWithLifecycle()
+    val scanError by viewModel.scanError.collectAsStateWithLifecycle()
+
+    val context = LocalContext.current
+    var permissionDenied by remember { mutableStateOf(false) }
+    val permissionLauncher = rememberLauncherForActivityResult(
+        ActivityResultContracts.RequestMultiplePermissions()
+    ) { granted ->
+        if (granted.values.all { it }) viewModel.startScan() else permissionDenied = true
+    }
+
+    fun scanWithPermission() {
+        val missing = BLE_PERMISSIONS.any {
+            ContextCompat.checkSelfPermission(context, it) != PackageManager.PERMISSION_GRANTED
+        }
+        if (missing) permissionLauncher.launch(BLE_PERMISSIONS) else viewModel.startScan()
+    }
+
+    DisposableEffect(Unit) {
+        onDispose { viewModel.stopScan() }
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text("Bluetooth-våg") },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = "Tillbaka")
+                    }
+                },
+            )
+        },
+    ) { padding ->
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(padding)
+                .verticalScroll(rememberScrollState())
+                .padding(16.dp),
+            verticalArrangement = Arrangement.spacedBy(14.dp),
+        ) {
+            settings.scaleAddress?.let { address ->
+                Card(modifier = Modifier.fillMaxWidth()) {
+                    Row(
+                        modifier = Modifier.padding(16.dp),
+                        verticalAlignment = Alignment.CenterVertically,
+                    ) {
+                        Icon(
+                            Icons.Default.MonitorWeight,
+                            contentDescription = null,
+                            tint = MaterialTheme.colorScheme.primary,
+                        )
+                        Column(modifier = Modifier.weight(1f).padding(start = 12.dp)) {
+                            Text(
+                                settings.scaleDriver ?: settings.scaleName ?: "Våg",
+                                style = MaterialTheme.typography.titleSmall,
+                            )
+                            Text(
+                                "${settings.scaleName ?: "?"} · $address",
+                                style = MaterialTheme.typography.bodySmall,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                            )
+                        }
+                        IconButton(onClick = viewModel::forgetScale) {
+                            Icon(
+                                Icons.Default.Delete,
+                                contentDescription = "Ta bort våg",
+                                tint = MaterialTheme.colorScheme.error,
+                            )
+                        }
+                    }
+                }
+            }
+
+            if (settings.scaleAddress == null) {
+                Text(
+                    "Sök efter din våg och välj den i listan. Kliv gärna på vågen under " +
+                        "sökningen — många vågar syns bara när de är vakna.",
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+
+            FilledTonalButton(
+                onClick = { if (isScanning) viewModel.stopScan() else scanWithPermission() },
+                modifier = Modifier.fillMaxWidth(),
+            ) {
+                if (isScanning) {
+                    CircularProgressIndicator(
+                        modifier = Modifier.size(18.dp),
+                        strokeWidth = 2.dp,
+                    )
+                    Text("Söker… (tryck för att stoppa)", modifier = Modifier.padding(start = 10.dp))
+                } else {
+                    Icon(Icons.Default.BluetoothSearching, contentDescription = null)
+                    Text("Sök efter våg", modifier = Modifier.padding(start = 10.dp))
+                }
+            }
+
+            if (permissionDenied) {
+                Text(
+                    "Bluetooth-behörighet nekades. Ge appen behörigheten \"Enheter i närheten\" " +
+                        "i systeminställningarna för att kunna söka efter vågen.",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.error,
+                )
+                FilledTonalButton(
+                    onClick = { context.openAppSettings() },
+                    modifier = Modifier.fillMaxWidth(),
+                ) { Text("Öppna appinställningarna") }
+            }
+            scanError?.let {
+                Text(it, style = MaterialTheme.typography.bodySmall, color = MaterialTheme.colorScheme.error)
+            }
+
+            val supported = devices.filter { it.isSupported }
+            val others = devices.filterNot { it.isSupported }
+
+            if (supported.isNotEmpty()) {
+                Text("Vågar med stöd", style = MaterialTheme.typography.titleSmall)
+                supported.forEach { d -> DeviceRow(d, onClick = { viewModel.saveScale(d) }) }
+            }
+            if (others.isNotEmpty()) {
+                Text(
+                    "Övriga enheter (ingen drivrutin matchar)",
+                    style = MaterialTheme.typography.labelSmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+                others.filter { it.name.isNotBlank() }.take(15).forEach { d ->
+                    DeviceRow(d, onClick = null)
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun DeviceRow(device: ScannedDeviceInfo, onClick: (() -> Unit)?) {
+    Card(
+        modifier = Modifier
+            .fillMaxWidth()
+            .let { if (onClick != null) it.clickable(onClick = onClick) else it },
+    ) {
+        Row(
+            modifier = Modifier.padding(horizontal = 16.dp, vertical = 12.dp),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            Icon(
+                if (device.isSupported) Icons.Default.CheckCircle else Icons.Default.Bluetooth,
+                contentDescription = null,
+                tint = if (device.isSupported) MaterialTheme.colorScheme.primary
+                else MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+            Column(modifier = Modifier.weight(1f).padding(start = 12.dp)) {
+                Text(
+                    device.determinedHandlerDisplayName ?: device.name.ifBlank { device.address },
+                    style = MaterialTheme.typography.titleSmall,
+                    fontWeight = if (device.isSupported) FontWeight.Bold else FontWeight.Normal,
+                )
+                Text(
+                    "${device.name.ifBlank { "namnlös" }} · ${device.address} · ${device.rssi} dBm",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+            if (device.isSupported) {
+                Text(
+                    "VÄLJ",
+                    style = MaterialTheme.typography.labelLarge,
+                    color = MaterialTheme.colorScheme.primary,
+                )
+            }
+        }
+    }
+}
+
+/* ==================== Väg dig ==================== */
+
+sealed class WeighState {
+    data object Idle : WeighState()
+    data class Working(val status: String) : WeighState()
+
+    /**
+     * Vikten är mottagen. [complete] = false medan vi fortfarande lyssnar efter
+     * en senare ram med kroppssammansättning (vågen skickar ofta vikten först
+     * och muskler/fett/vatten någon sekund senare).
+     */
+    data class Done(val measurement: ScaleMeasurement, val complete: Boolean) : WeighState()
+    data class Failed(val message: String) : WeighState()
+}
+
+private fun ScaleMeasurement.hasComposition(): Boolean =
+    fat > 0f || water > 0f || muscle > 0f
+
+class WeighViewModel(
+    private val scaleManager: ScaleManager,
+    private val repo: GymRepository,
+) : ViewModel() {
+    val state = MutableStateFlow<WeighState>(WeighState.Idle)
+    val saved = MutableStateFlow(false)
+    val saveError = MutableStateFlow<String?>(null)
+    val missingBodyData = MutableStateFlow(false)
+
+    private var compositionTimeout: kotlinx.coroutines.Job? = null
+
+    init {
+        viewModelScope.launch {
+            scaleManager.lastEvent.collect { event ->
+                val current = state.value
+                when (event) {
+                    null -> {}
+                    is BluetoothEvent.MeasurementReceived -> onMeasurement(event.measurement)
+                    is BluetoothEvent.Listening ->
+                        if (current !is WeighState.Done)
+                            state.value = WeighState.Working("Lyssnar efter vågen — kliv på den…")
+                    is BluetoothEvent.Connected ->
+                        if (current !is WeighState.Done)
+                            state.value = WeighState.Working("Ansluten — ställ dig barfota på vågen")
+                    is BluetoothEvent.DeviceMessage ->
+                        if (current !is WeighState.Done)
+                            state.value = WeighState.Working(event.message)
+                    is BluetoothEvent.ConnectionFailed ->
+                        if (current !is WeighState.Done)
+                            state.value = WeighState.Failed("Kunde inte ansluta: ${event.error}")
+                    is BluetoothEvent.Error ->
+                        if (current !is WeighState.Done)
+                            state.value = WeighState.Failed(event.error)
+                    is BluetoothEvent.Disconnected -> when (current) {
+                        is WeighState.Working ->
+                            state.value = WeighState.Failed("Vågen kopplade från innan mätningen blev klar")
+                        // Tappade vi länken medan vi väntade på sammansättningen
+                        // behåller vi vikten och avslutar mätningen.
+                        is WeighState.Done -> finishMeasurement()
+                        else -> {}
+                    }
+                    is BluetoothEvent.BroadcastComplete, is BluetoothEvent.UserInteractionRequired -> {}
+                }
+            }
+        }
+    }
+
+    /**
+     * Vågen kan publicera flera ramar: först bara vikt, sen en med
+     * muskler/fett/vatten. Vi mergar och blir klara först när sammansättningen
+     * kommit — eller efter en väntetid om den uteblir.
+     */
+    private fun onMeasurement(measurement: ScaleMeasurement) {
+        val previous = (state.value as? WeighState.Done)?.measurement
+        val merged = previous?.let { measurement.mergeWith(it) } ?: measurement
+
+        if (merged.hasComposition()) {
+            compositionTimeout?.cancel()
+            compositionTimeout = null
+            state.value = WeighState.Done(merged, complete = true)
+            scaleManager.disconnect()
+        } else {
+            state.value = WeighState.Done(merged, complete = false)
+            if (compositionTimeout == null) {
+                compositionTimeout = viewModelScope.launch {
+                    kotlinx.coroutines.delay(20_000)
+                    finishMeasurement()
+                }
+            }
+        }
+    }
+
+    /** Avsluta med det vi har (vikt utan sammansättning). */
+    private fun finishMeasurement() {
+        compositionTimeout?.cancel()
+        compositionTimeout = null
+        (state.value as? WeighState.Done)?.let { d ->
+            if (!d.complete) state.value = d.copy(complete = true)
+        }
+        scaleManager.disconnect()
+    }
+
+    fun start() {
+        compositionTimeout?.cancel()
+        compositionTimeout = null
+        state.value = WeighState.Working("Söker efter vågen…")
+        saved.value = false
+        saveError.value = null
+        viewModelScope.launch {
+            missingBodyData.value = !scaleManager.hasBodyData()
+            val ok = scaleManager.connectSavedScale()
+            if (!ok) state.value = WeighState.Failed("Ingen våg är vald, eller så saknas drivrutin. Gå till Inställningar → Bluetooth-våg.")
+        }
+    }
+
+    fun stop() {
+        scaleManager.disconnect()
+    }
+
+    fun save(m: ScaleMeasurement) {
+        viewModelScope.launch {
+            fun pct(v: Float): Double? = if (v > 0f) String.format(java.util.Locale.US, "%.1f", v).toDouble() else null
+            try {
+                saveError.value = null
+                repo.addBodyMeasurement(
+                    weightKg = String.format(java.util.Locale.US, "%.1f", m.weight).toDouble(),
+                    dateIso = null,
+                    musclePercent = pct(m.muscle),
+                    fatPercent = pct(m.fat),
+                    waterPercent = pct(m.water),
+                )
+                saved.value = true
+            } catch (e: Exception) {
+                saveError.value = "Kunde inte spara mätningen — offline? Prova igen."
+            }
+        }
+    }
+
+    override fun onCleared() {
+        stop()
+    }
+
+    companion object {
+        val Factory: ViewModelProvider.Factory = viewModelFactory {
+            initializer {
+                val c = appContainer()
+                WeighViewModel(c.scaleManager, c.gymRepository)
+            }
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun WeighScreen(
+    onBack: () -> Unit,
+    viewModel: WeighViewModel = viewModel(factory = WeighViewModel.Factory),
+) {
+    val state by viewModel.state.collectAsStateWithLifecycle()
+    val saved by viewModel.saved.collectAsStateWithLifecycle()
+    val saveError by viewModel.saveError.collectAsStateWithLifecycle()
+    val missingBodyData by viewModel.missingBodyData.collectAsStateWithLifecycle()
+
+    val context = LocalContext.current
+    var permissionDenied by remember { mutableStateOf(false) }
+    val permissionLauncher = rememberLauncherForActivityResult(
+        ActivityResultContracts.RequestMultiplePermissions()
+    ) { granted ->
+        if (granted.values.all { it }) viewModel.start() else permissionDenied = true
+    }
+
+    LaunchedEffect(Unit) {
+        val missing = BLE_PERMISSIONS.any {
+            ContextCompat.checkSelfPermission(context, it) != PackageManager.PERMISSION_GRANTED
+        }
+        if (missing) permissionLauncher.launch(BLE_PERMISSIONS) else viewModel.start()
+    }
+
+    DisposableEffect(Unit) {
+        onDispose { viewModel.stop() }
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text("Väg dig") },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = "Tillbaka")
+                    }
+                },
+            )
+        },
+    ) { padding ->
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(padding)
+                .verticalScroll(rememberScrollState())
+                .padding(16.dp),
+            verticalArrangement = Arrangement.spacedBy(14.dp),
+        ) {
+            if (missingBodyData) {
+                Card(
+                    modifier = Modifier.fillMaxWidth(),
+                    colors = androidx.compose.material3.CardDefaults.cardColors(
+                        containerColor = MaterialTheme.colorScheme.errorContainer,
+                    ),
+                ) {
+                    Column(
+                        modifier = Modifier.padding(16.dp),
+                        verticalArrangement = Arrangement.spacedBy(6.dp),
+                    ) {
+                        Text(
+                            "Kroppsdata saknas!",
+                            style = MaterialTheme.typography.titleSmall,
+                            color = MaterialTheme.colorScheme.onErrorContainer,
+                        )
+                        Text(
+                            "Utan längd, födelseår och kön kan vågen bara mäta vikt — " +
+                                "muskler/fett/vatten uteblir. Fyll i under Profil → Kroppsdata " +
+                                "och väg dig sedan igen.",
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onErrorContainer,
+                        )
+                    }
+                }
+            }
+
+            if (permissionDenied) {
+                Text(
+                    "Bluetooth-behörighet nekades — kan inte nå vågen.",
+                    color = MaterialTheme.colorScheme.error,
+                )
+                FilledTonalButton(
+                    onClick = { context.openAppSettings() },
+                    modifier = Modifier.fillMaxWidth(),
+                ) { Text("Öppna appinställningarna") }
+            }
+
+            when (val s = state) {
+                is WeighState.Idle -> {}
+                is WeighState.Working -> {
+                    Card(modifier = Modifier.fillMaxWidth()) {
+                        Column(
+                            modifier = Modifier.fillMaxWidth().padding(24.dp),
+                            horizontalAlignment = Alignment.CenterHorizontally,
+                            verticalArrangement = Arrangement.spacedBy(16.dp),
+                        ) {
+                            CircularProgressIndicator()
+                            Text(
+                                s.status,
+                                style = MaterialTheme.typography.titleMedium,
+                            )
+                        }
+                    }
+                }
+                is WeighState.Failed -> {
+                    Card(modifier = Modifier.fillMaxWidth()) {
+                        Column(
+                            modifier = Modifier.padding(16.dp),
+                            verticalArrangement = Arrangement.spacedBy(12.dp),
+                        ) {
+                            Text(s.message, color = MaterialTheme.colorScheme.error)
+                            Button(onClick = viewModel::start, modifier = Modifier.fillMaxWidth()) {
+                                Text("Försök igen")
+                            }
+                        }
+                    }
+                }
+                is WeighState.Done -> {
+                    val m = s.measurement
+                    Card(modifier = Modifier.fillMaxWidth()) {
+                        Column(
+                            modifier = Modifier.fillMaxWidth().padding(20.dp),
+                            verticalArrangement = Arrangement.spacedBy(10.dp),
+                        ) {
+                            Row(verticalAlignment = Alignment.CenterVertically) {
+                                Icon(
+                                    Icons.Default.MonitorWeight,
+                                    contentDescription = null,
+                                    tint = MaterialTheme.colorScheme.primary,
+                                )
+                                Text(
+                                    "${m.weight.toDouble().compact()} kg",
+                                    style = MaterialTheme.typography.displaySmall,
+                                    modifier = Modifier.padding(start = 12.dp),
+                                )
+                            }
+                            ResultRow("Muskler", m.muscle, "%")
+                            ResultRow("Fett", m.fat, "%")
+                            ResultRow("Vatten", m.water, "%")
+                            ResultRow("Benmassa", m.bone, " kg")
+                            ResultRow("Bukfett (index)", m.visceralFat, "")
+
+                            if (!s.complete) {
+                                Row(verticalAlignment = Alignment.CenterVertically) {
+                                    CircularProgressIndicator(
+                                        modifier = Modifier.size(16.dp),
+                                        strokeWidth = 2.dp,
+                                    )
+                                    Text(
+                                        "Väntar på muskler/fett/vatten — stå kvar på vågen…",
+                                        style = MaterialTheme.typography.bodySmall,
+                                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                        modifier = Modifier.padding(start = 10.dp),
+                                    )
+                                }
+                            } else if (!m.hasComposition()) {
+                                Text(
+                                    "Ingen kroppssammansättning togs emot. Kontrollera att " +
+                                        "längd/födelseår/kön är ifyllda i profilen och väg dig " +
+                                        "barfota med torra fötter.",
+                                    style = MaterialTheme.typography.bodySmall,
+                                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                )
+                            }
+
+                            saveError?.let {
+                                Text(
+                                    it,
+                                    color = MaterialTheme.colorScheme.error,
+                                    style = MaterialTheme.typography.bodySmall,
+                                )
+                            }
+                            if (saved) {
+                                Text(
+                                    "Sparad som kroppsmätning ✓",
+                                    color = MaterialTheme.colorScheme.primary,
+                                    style = MaterialTheme.typography.titleSmall,
+                                )
+                                Button(onClick = onBack, modifier = Modifier.fillMaxWidth()) {
+                                    Text("Klar")
+                                }
+                            } else {
+                                Button(
+                                    onClick = { viewModel.save(m) },
+                                    modifier = Modifier.fillMaxWidth(),
+                                ) { Text("Spara mätningen") }
+                                TextButton(
+                                    onClick = viewModel::start,
+                                    modifier = Modifier.fillMaxWidth(),
+                                ) { Text("Väg om") }
+                            }
+                        }
+                    }
+                }
+            }
+
+            Box(modifier = Modifier.fillMaxWidth(), contentAlignment = Alignment.Center) {
+                Text(
+                    "Vågen räknar ut kroppssammansättningen med hjälp av längd, " +
+                        "födelseår och kön från profilen.",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun ResultRow(label: String, value: Float, suffix: String) {
+    if (value <= 0f) return
+    Row(modifier = Modifier.fillMaxWidth()) {
+        Text(
+            label,
+            modifier = Modifier.weight(1f),
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+        Text("${value.toDouble().compact()}$suffix")
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/ui/session/PlateCalculator.kt

@@ -0,0 +1,175 @@
+package eu.brassepc.fitnessdroid.ui.session
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.FilterChip
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.ModalBottomSheet
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.dp
+
+/** Standardfärger på viktskivor (IPF-ish). Vikt i gram för exakt matematik. */
+private data class Plate(val grams: Int, val color: Color, val heightDp: Dp, val widthDp: Dp)
+
+private val PLATES = listOf(
+    Plate(25_000, Color(0xFFD32F2F), 88.dp, 13.dp),   // 25 röd
+    Plate(20_000, Color(0xFF1E64C8), 88.dp, 12.dp),   // 20 blå
+    Plate(15_000, Color(0xFFF9C513), 76.dp, 11.dp),   // 15 gul
+    Plate(10_000, Color(0xFF3E9B4F), 62.dp, 10.dp),   // 10 grön
+    Plate(5_000, Color(0xFFECECE4), 46.dp, 9.dp),     // 5 vit
+    Plate(2_500, Color(0xFF212121), 34.dp, 8.dp),     // 2,5 svart
+    Plate(1_250, Color(0xFF9E9E9E), 26.dp, 7.dp),     // 1,25 grå
+)
+
+private fun breakdown(perSideGrams: Int): Pair<List<Plate>, Int> {
+    var rest = perSideGrams
+    val result = mutableListOf<Plate>()
+    for (plate in PLATES) {
+        while (rest >= plate.grams) {
+            result += plate
+            rest -= plate.grams
+        }
+    }
+    return result to rest
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun PlateCalculatorSheet(
+    weightKg: Double,
+    customBarWeights: List<Double>,
+    onDismiss: () -> Unit,
+) {
+    var barKg by remember { mutableStateOf(20.0) }
+    val barOptions = (listOf(20.0, 0.0) + customBarWeights).distinct()
+
+    val perSideGrams = (((weightKg - barKg) / 2.0) * 1000).toInt().coerceAtLeast(0)
+    val (plates, restGrams) = breakdown(perSideGrams)
+
+    ModalBottomSheet(onDismissRequest = onDismiss) {
+        Column(
+            modifier = Modifier.padding(horizontal = 20.dp).padding(bottom = 28.dp),
+            verticalArrangement = Arrangement.spacedBy(12.dp),
+        ) {
+            Text(
+                "${weightKg.compact()} kg på stången",
+                style = MaterialTheme.typography.titleLarge,
+            )
+
+            androidx.compose.foundation.lazy.LazyRow(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                items(barOptions.size) { i ->
+                    val option = barOptions[i]
+                    FilterChip(
+                        selected = barKg == option,
+                        onClick = { barKg = option },
+                        label = {
+                            Text(
+                                when (option) {
+                                    0.0 -> "Utan stång"
+                                    20.0 -> "Stång 20 kg"
+                                    else -> "Stång ${option.compact()} kg"
+                                }
+                            )
+                        },
+                    )
+                }
+            }
+
+            if (weightKg < barKg) {
+                Text(
+                    "Vikten är lägre än stången — bara stången räcker (${barKg.compact()} kg).",
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            } else {
+                // Skivorna för ena sidan, störst innerst
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .height(96.dp),
+                    verticalAlignment = Alignment.CenterVertically,
+                ) {
+                    // stångskaft in mot mitten
+                    Box(
+                        modifier = Modifier
+                            .weight(1f)
+                            .height(8.dp)
+                            .background(Color(0xFF757575), RoundedCornerShape(3.dp)),
+                    )
+                    // låskrage
+                    Box(
+                        modifier = Modifier
+                            .padding(horizontal = 2.dp)
+                            .size(width = 8.dp, height = 24.dp)
+                            .background(Color(0xFF8D8D8D), RoundedCornerShape(2.dp)),
+                    )
+                    plates.forEach { plate ->
+                        Box(
+                            modifier = Modifier
+                                .padding(horizontal = 1.5.dp)
+                                .size(width = plate.widthDp, height = plate.heightDp)
+                                .background(plate.color, RoundedCornerShape(3.dp)),
+                        )
+                    }
+                    Box(
+                        modifier = Modifier
+                            .weight(0.3f)
+                            .height(8.dp)
+                            .background(Color(0xFF757575), RoundedCornerShape(3.dp)),
+                    )
+                }
+
+                Text(
+                    buildString {
+                        append("Per sida: ")
+                        if (plates.isEmpty()) {
+                            append("inga skivor")
+                        } else {
+                            append(
+                                plates.groupBy { it.grams }.entries
+                                    .sortedByDescending { it.key }
+                                    .joinToString(" + ") { (grams, list) ->
+                                        val kg = grams / 1000.0
+                                        if (list.size > 1) "${list.size}×${kg.compact()}" else kg.compact()
+                                    }
+                            )
+                            append(" kg")
+                        }
+                    },
+                    style = MaterialTheme.typography.titleMedium,
+                    fontWeight = FontWeight.Bold,
+                )
+
+                if (restGrams > 0) {
+                    val reachable = weightKg - (restGrams * 2 / 1000.0)
+                    Text(
+                        "Går inte att lägga exakt med standardskivor — närmast är " +
+                            "${reachable.compact()} kg (${(restGrams / 1000.0).compact()} kg/sida saknas).",
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+        }
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/ui/session/SessionViewModel.kt

@@ -0,0 +1,245 @@
+package eu.brassepc.fitnessdroid.ui.session
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.viewmodel.initializer
+import androidx.lifecycle.viewmodel.viewModelFactory
+import eu.brassepc.fitnessdroid.data.AppSettings
+import eu.brassepc.fitnessdroid.data.GymRepository
+import eu.brassepc.fitnessdroid.data.RestState
+import eu.brassepc.fitnessdroid.data.RestTimerController
+import eu.brassepc.fitnessdroid.data.SettingsStore
+import eu.brassepc.fitnessdroid.data.local.CachedExerciseType
+import eu.brassepc.fitnessdroid.data.local.LocalSet
+import eu.brassepc.fitnessdroid.ui.appContainer
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.flatMapLatest
+import kotlinx.coroutines.flow.flowOf
+import kotlinx.coroutines.flow.stateIn
+import kotlinx.coroutines.launch
+
+/** Utkast till nästa set för en övning (styrs av steppers i UI:t). */
+data class SetDraft(
+    val weight: Double? = null,
+    val reps: Int? = null,
+    val durationSeconds: Int? = null,
+    val distanceMeters: Double? = null,
+    val rpe: Double? = null,
+)
+
+data class ExercisePage(
+    val localId: Long,
+    val type: CachedExerciseType?,
+    val name: String,
+    val doneSets: List<LocalSet>,
+    val draft: SetDraft,
+    val lastPerformanceText: String?,
+)
+
+data class SessionUiState(
+    val sessionId: Long? = null,
+    val sessionName: String,
+    val startedAtEpochMs: Long = 0,
+    val pages: List<ExercisePage> = emptyList(),
+    val pendingCount: Int = 0,
+    val rest: RestState? = null,
+    val settings: AppSettings = AppSettings(),
+    val completedLocally: Boolean = false,
+) {
+    companion object { val EMPTY = SessionUiState(sessionName = "Pass") }
+}
+
+@OptIn(ExperimentalCoroutinesApi::class)
+class SessionViewModel(
+    private val repo: GymRepository,
+    private val restTimer: RestTimerController,
+    private val settingsStore: SettingsStore,
+) : ViewModel() {
+
+    /** exerciseLocalId → utkast som användaren pillat på */
+    private val drafts = MutableStateFlow<Map<Long, SetDraft>>(emptyMap())
+
+    private val sessionFlow = repo.activeSession
+
+    private val bundleFlow = sessionFlow.flatMapLatest { session ->
+        if (session == null) {
+            flowOf(SessionUiState.EMPTY)
+        } else {
+            combine(
+                repo.exercises(session.id),
+                repo.setsForSession(session.id),
+                repo.exerciseTypes,
+                drafts,
+                repo.pendingCount,
+            ) { exercises, sets, types, draftMap, pending ->
+                val typeById = types.associateBy { it.id }
+                val setsByExercise = sets.groupBy { it.exerciseId }
+                SessionUiState(
+                    sessionId = session.id,
+                    sessionName = session.name ?: "Fritt pass",
+                    startedAtEpochMs = session.startedAtEpochMs,
+                    pendingCount = pending,
+                    pages = exercises.map { ex ->
+                        val type = typeById[ex.exerciseTypeId]
+                        val done = setsByExercise[ex.id].orEmpty()
+                        ExercisePage(
+                            localId = ex.id,
+                            type = type,
+                            name = type?.name ?: "Övning ${ex.order}",
+                            doneSets = done,
+                            draft = draftMap[ex.id] ?: initialDraft(type, done),
+                            lastPerformanceText = type?.lastWeight?.let { w ->
+                                "Senast: ${w.compact()} kg" +
+                                    (type.lastReps?.let { " × $it" } ?: "")
+                            },
+                        )
+                    },
+                )
+            }
+        }
+    }
+
+    val uiState = combine(
+        bundleFlow,
+        restTimer.state,
+        settingsStore.settings,
+    ) { bundle, rest, settings ->
+        bundle.copy(rest = rest, settings = settings)
+    }.stateIn(viewModelScope, SharingStarted.WhileSubscribed(5000), SessionUiState.EMPTY)
+
+    /** Förifyll utkastet: senaste setet i passet, annars cachens senaste prestation. */
+    private fun initialDraft(type: CachedExerciseType?, done: List<LocalSet>): SetDraft {
+        val last = done.lastOrNull()
+        return SetDraft(
+            weight = last?.weight ?: type?.lastWeight
+                ?: if (type?.tracksWeight == true) 20.0 else null,
+            reps = last?.reps ?: type?.lastReps
+                ?: if (type?.tracksReps == true) 8 else null,
+            durationSeconds = last?.durationSeconds ?: type?.lastDurationSeconds
+                ?: if (type?.tracksDuration == true) 30 else null,
+            distanceMeters = last?.distanceMeters ?: type?.lastDistanceMeters
+                ?: if (type?.tracksDistance == true) 1000.0 else null,
+            rpe = last?.rpe,
+        )
+    }
+
+    fun updateDraft(exerciseId: Long, transform: (SetDraft) -> SetDraft) {
+        val page = uiState.value.pages.firstOrNull { it.localId == exerciseId } ?: return
+        drafts.value = drafts.value + (exerciseId to transform(page.draft))
+    }
+
+    fun logSet(exerciseId: Long) {
+        val page = uiState.value.pages.firstOrNull { it.localId == exerciseId } ?: return
+        val d = page.draft
+        viewModelScope.launch {
+            repo.logSet(
+                exerciseId = exerciseId,
+                reps = if (page.type?.tracksReps != false) d.reps else null,
+                weight = if (page.type?.tracksWeight != false) d.weight else null,
+                distanceMeters = if (page.type?.tracksDistance == true) d.distanceMeters else null,
+                durationSeconds = if (page.type?.tracksDuration == true) d.durationSeconds else null,
+                rpe = d.rpe,
+                isWarmup = false,
+            )
+            // API-tillägget defaultRestSeconds per övning; annars appens standard.
+            restTimer.start(page.type?.defaultRestSeconds)
+        }
+    }
+
+    fun adjustRest(delta: Int) = restTimer.adjust(delta)
+    fun skipRest() = restTimer.dismiss()
+
+    /** Rätta ett redan loggat set (synkas som update, eller bärs av väntande add). */
+    fun saveEditedSet(setId: Long, draft: SetDraft) {
+        val set = uiState.value.pages.flatMap { it.doneSets }.firstOrNull { it.id == setId } ?: return
+        viewModelScope.launch {
+            repo.updateSet(
+                set.copy(
+                    weight = draft.weight,
+                    reps = draft.reps,
+                    durationSeconds = draft.durationSeconds,
+                    distanceMeters = draft.distanceMeters,
+                    rpe = draft.rpe,
+                )
+            )
+        }
+    }
+
+    fun deleteSet(setId: Long) {
+        viewModelScope.launch { repo.deleteSet(setId) }
+    }
+
+    /* ---------- Övningshistorik-arket ---------- */
+
+    sealed interface HistorySheetState {
+        data class Loading(val exerciseName: String) : HistorySheetState
+        data class Error(val exerciseName: String) : HistorySheetState
+        data class Ready(
+            val exerciseName: String,
+            val history: eu.brassepc.fitnessdroid.data.ExerciseHistory,
+        ) : HistorySheetState
+    }
+
+    private val _historySheet = MutableStateFlow<HistorySheetState?>(null)
+    val historySheet = _historySheet.asStateFlow()
+
+    fun openExerciseHistory(page: ExercisePage) {
+        val typeId = page.type?.id ?: return
+        _historySheet.value = HistorySheetState.Loading(page.name)
+        viewModelScope.launch {
+            _historySheet.value = try {
+                HistorySheetState.Ready(page.name, repo.fetchExerciseHistory(typeId))
+            } catch (e: Exception) {
+                HistorySheetState.Error(page.name)
+            }
+        }
+    }
+
+    fun closeExerciseHistory() {
+        _historySheet.value = null
+    }
+
+    /** Kroppsvikt för kaloriuppskattningen (cachad från profilen). */
+    val bodyWeightKg = MutableStateFlow<Double?>(null)
+
+    /** Personbästa (typeId, reps) → vikt, för 🏆-markeringen vid avslut. */
+    val personalBests = MutableStateFlow<Map<Pair<Int, Int>, Double>>(emptyMap())
+
+    init {
+        viewModelScope.launch {
+            bodyWeightKg.value = repo.bodyWeightKg()
+            personalBests.value = repo.personalBests()
+        }
+    }
+
+    fun completeSession(
+        durationSecondsOverride: Int?,
+        editedStartEpochMs: Long?,
+        onDone: () -> Unit,
+    ) {
+        viewModelScope.launch {
+            val id = uiState.value.sessionId ?: sessionFlow.first()?.id ?: return@launch
+            restTimer.dismiss()
+            repo.completeSession(id, durationSecondsOverride, editedStartEpochMs)
+            onDone()
+        }
+    }
+
+    companion object {
+        val Factory: ViewModelProvider.Factory = viewModelFactory {
+            initializer {
+                val c = appContainer()
+                SessionViewModel(c.gymRepository, c.restTimer, c.settingsStore)
+            }
+        }
+    }
+}
+
+internal fun Double.compact(): String =
+    if (this % 1.0 == 0.0) toInt().toString() else "%.1f".format(this)

app/src/main/java/eu/brassepc/fitnessdroid/ui/settings/SettingsScreen.kt

@@ -0,0 +1,595 @@
+package eu.brassepc.fitnessdroid.ui.settings
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.selection.selectable
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.Close
+import androidx.compose.runtime.setValue
+import androidx.compose.material3.Card
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.FilledTonalButton
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.RadioButton
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.lifecycle.viewmodel.initializer
+import androidx.lifecycle.viewmodel.viewModelFactory
+import eu.brassepc.fitnessdroid.data.AppSettings
+import eu.brassepc.fitnessdroid.data.RestAlert
+import eu.brassepc.fitnessdroid.data.RestTimerStyle
+import eu.brassepc.fitnessdroid.data.SettingsStore
+import eu.brassepc.fitnessdroid.ui.appContainer
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.stateIn
+import kotlinx.coroutines.launch
+
+data class StepsSyncState(
+    val available: Boolean = false,
+    val granted: Boolean = false,
+    val todaySteps: Int? = null,
+    val syncing: Boolean = false,
+)
+
+class SettingsViewModel(
+    private val store: SettingsStore,
+    private val tokenStore: eu.brassepc.fitnessdroid.data.TokenStore,
+    private val credentialStore: eu.brassepc.fitnessdroid.data.CredentialStore,
+    val stepsSync: eu.brassepc.fitnessdroid.data.StepsSync,
+) : ViewModel() {
+    val stepsState = kotlinx.coroutines.flow.MutableStateFlow(StepsSyncState())
+
+    fun refreshStepsState() = viewModelScope.launch {
+        stepsState.value = stepsState.value.copy(
+            available = stepsSync.isAvailable(),
+            granted = stepsSync.hasPermission(),
+        )
+    }
+
+    fun syncStepsNow() = viewModelScope.launch {
+        stepsState.value = stepsState.value.copy(syncing = true)
+        val steps = runCatching { stepsSync.syncNow() }.getOrNull()
+        stepsState.value = stepsState.value.copy(syncing = false, todaySteps = steps)
+    }
+    val settings = store.settings
+        .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5000), AppSettings())
+
+    val apiUrl = kotlinx.coroutines.flow.MutableStateFlow("")
+
+    init {
+        viewModelScope.launch { apiUrl.value = tokenStore.apiUrl() }
+        refreshStepsState()
+    }
+
+    fun setStyle(value: RestTimerStyle) = viewModelScope.launch { store.setRestTimerStyle(value) }
+    fun setAlert(value: RestAlert) = viewModelScope.launch { store.setRestAlert(value) }
+    fun adjustRestSeconds(delta: Int) = viewModelScope.launch {
+        store.setDefaultRestSeconds(settings.value.defaultRestSeconds + delta)
+    }
+
+    fun setWeightStep(value: Double) = viewModelScope.launch { store.setWeightStep(value) }
+
+    fun addCustomBar(value: Double) = viewModelScope.launch { store.addCustomBarWeight(value) }
+    fun removeCustomBar(value: Double) = viewModelScope.launch { store.removeCustomBarWeight(value) }
+
+    fun setTrackLog(value: Boolean) = viewModelScope.launch { store.setTrackLogEnabled(value) }
+
+    fun adjustGpsAccuracy(delta: Int) = viewModelScope.launch {
+        store.setGpsAccuracyLimit(settings.value.gpsAccuracyLimitM + delta)
+    }
+    fun adjustGpsSpeedFactor(delta: Double) = viewModelScope.launch {
+        store.setGpsSpeedFactor(settings.value.gpsSpeedFactor + delta)
+    }
+    fun adjustGpsSpeedFloor(delta: Int) = viewModelScope.launch {
+        store.setGpsSpeedFloor(settings.value.gpsSpeedFloorKmh + delta)
+    }
+    fun setMotionGuard(value: Boolean) = viewModelScope.launch { store.setMotionGuardEnabled(value) }
+    fun adjustCountdown(delta: Int) = viewModelScope.launch {
+        store.setCountdownSeconds(settings.value.countdownSeconds + delta)
+    }
+    fun adjustMotionThreshold(delta: Double) = viewModelScope.launch {
+        store.setMotionThreshold(settings.value.motionThreshold + delta)
+    }
+
+    fun setAutoRelogin(value: Boolean) = viewModelScope.launch {
+        store.setAutoRelogin(value)
+        // Stängs funktionen av slängs de sparade uppgifterna direkt.
+        if (!value) runCatching { credentialStore.clear() }
+    }
+
+    fun onApiUrlChange(value: String) { apiUrl.value = value }
+
+    fun saveApiUrl() = viewModelScope.launch {
+        tokenStore.saveApiUrl(apiUrl.value.trim())
+    }
+
+    companion object {
+        val Factory: ViewModelProvider.Factory = viewModelFactory {
+            initializer {
+                val c = appContainer()
+                SettingsViewModel(c.settingsStore, c.tokenStore, c.credentialStore, c.stepsSync)
+            }
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun SettingsScreen(
+    onBack: () -> Unit,
+    onOpenScale: () -> Unit = {},
+    viewModel: SettingsViewModel = viewModel(factory = SettingsViewModel.Factory),
+) {
+    val settings by viewModel.settings.collectAsStateWithLifecycle()
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text("Inställningar") },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = "Tillbaka")
+                    }
+                },
+            )
+        },
+    ) { padding ->
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(padding)
+                .verticalScroll(rememberScrollState())
+                .padding(16.dp),
+            verticalArrangement = Arrangement.spacedBy(16.dp),
+        ) {
+            SettingsCard(title = "Bluetooth-våg") {
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .clickable(onClick = onOpenScale)
+                        .padding(horizontal = 16.dp, vertical = 12.dp),
+                    verticalAlignment = Alignment.CenterVertically,
+                ) {
+                    Column(modifier = Modifier.weight(1f)) {
+                        Text(
+                            settings.scaleDriver ?: "Ingen våg vald",
+                            fontWeight = FontWeight.Medium,
+                        )
+                        Text(
+                            settings.scaleAddress?.let { "Tryck för att byta eller ta bort" }
+                                ?: "Tryck för att söka och koppla en våg",
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        )
+                    }
+                }
+            }
+
+            SettingsCard(title = "Stegsynk (Health Connect)") {
+                val stepsState by viewModel.stepsState.collectAsStateWithLifecycle()
+                val context = androidx.compose.ui.platform.LocalContext.current
+                val hcLauncher = androidx.activity.compose.rememberLauncherForActivityResult(
+                    androidx.health.connect.client.PermissionController
+                        .createRequestPermissionResultContract()
+                ) { _ -> viewModel.refreshStepsState() }
+
+                Column(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(horizontal = 16.dp, vertical = 6.dp),
+                    verticalArrangement = Arrangement.spacedBy(8.dp),
+                ) {
+                    Text(
+                        "Läser dagens steg från telefonen (Health Connect) och räknar in " +
+                            "dem i kalorimätaren och stegmålen.",
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                    when {
+                        !stepsState.available -> {
+                            Text(
+                                "Health Connect saknas på telefonen.",
+                                color = MaterialTheme.colorScheme.error,
+                                style = MaterialTheme.typography.bodyMedium,
+                            )
+                            FilledTonalButton(
+                                onClick = {
+                                    runCatching {
+                                        context.startActivity(
+                                            android.content.Intent(
+                                                android.content.Intent.ACTION_VIEW,
+                                                android.net.Uri.parse("market://details?id=com.google.android.apps.healthdata"),
+                                            )
+                                        )
+                                    }
+                                },
+                                modifier = Modifier.fillMaxWidth(),
+                            ) { Text("Installera Health Connect") }
+                        }
+                        !stepsState.granted -> {
+                            FilledTonalButton(
+                                onClick = { hcLauncher.launch(setOf(viewModel.stepsSync.stepsPermission)) },
+                                modifier = Modifier.fillMaxWidth(),
+                            ) { Text("Aktivera stegläsning") }
+                        }
+                        else -> {
+                            Text(
+                                "Aktiv ✓" + (stepsState.todaySteps?.let { " · idag: $it steg" } ?: ""),
+                                color = MaterialTheme.colorScheme.primary,
+                                style = MaterialTheme.typography.bodyMedium,
+                            )
+                            FilledTonalButton(
+                                onClick = viewModel::syncStepsNow,
+                                enabled = !stepsState.syncing,
+                                modifier = Modifier.fillMaxWidth(),
+                            ) { Text(if (stepsState.syncing) "Synkar…" else "Synka nu") }
+                        }
+                    }
+                }
+            }
+
+            SettingsCard(title = "GPS-spårning") {
+                Text(
+                    "Filter mot GPS-brus i aktivitetsspårningen. Fartgrinden förkastar " +
+                        "positionshopp som skulle kräva högre fart än faktorn × GPS:ens " +
+                        "egen fartmätning (Doppler).",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(horizontal = 16.dp, vertical = 4.dp),
+                )
+                StepperRow(
+                    label = "Noggrannhetsgräns",
+                    value = "${settings.gpsAccuracyLimitM} m",
+                    onMinus = { viewModel.adjustGpsAccuracy(-5) },
+                    onPlus = { viewModel.adjustGpsAccuracy(5) },
+                )
+                StepperRow(
+                    label = "Fartgrind (× uppmätt fart)",
+                    value = "${settings.gpsSpeedFactor}×",
+                    onMinus = { viewModel.adjustGpsSpeedFactor(-0.5) },
+                    onPlus = { viewModel.adjustGpsSpeedFactor(0.5) },
+                )
+                StepperRow(
+                    label = "Fartgolv",
+                    value = "${settings.gpsSpeedFloorKmh} km/h",
+                    onMinus = { viewModel.adjustGpsSpeedFloor(-2) },
+                    onPlus = { viewModel.adjustGpsSpeedFloor(2) },
+                )
+                StepperRow(
+                    label = "Nedräkning vid start",
+                    value = "${settings.countdownSeconds} s",
+                    onMinus = { viewModel.adjustCountdown(-1) },
+                    onPlus = { viewModel.adjustCountdown(1) },
+                )
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(horizontal = 16.dp, vertical = 2.dp),
+                    verticalAlignment = Alignment.CenterVertically,
+                ) {
+                    Column(modifier = Modifier.weight(1f)) {
+                        Text("Rörelsevakt (accelerometer)", style = MaterialTheme.typography.bodyLarge)
+                        Text(
+                            "Fryser spår och distans när telefonen känner att du står stilla.",
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        )
+                    }
+                    androidx.compose.material3.Switch(
+                        checked = settings.motionGuardEnabled,
+                        onCheckedChange = viewModel::setMotionGuard,
+                    )
+                }
+                if (settings.motionGuardEnabled) {
+                    StepperRow(
+                        label = "Rörelsekänslighet",
+                        value = "${settings.motionThreshold} m/s²",
+                        onMinus = { viewModel.adjustMotionThreshold(-0.05) },
+                        onPlus = { viewModel.adjustMotionThreshold(0.05) },
+                    )
+                }
+                Text(
+                    "Gäller från nästa startade aktivitet. Standard: 35 m / 2,0× / 12 km/h / 0,35 m/s².",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(horizontal = 16.dp, vertical = 4.dp),
+                )
+            }
+
+            SettingsCard(title = "Felsökning") {
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(horizontal = 16.dp, vertical = 6.dp),
+                    verticalAlignment = Alignment.CenterVertically,
+                ) {
+                    Column(modifier = Modifier.weight(1f)) {
+                        Text("Teknisk spårningslogg", style = MaterialTheme.typography.bodyLarge)
+                        Text(
+                            "Visar GPS-loggen på aktivitetsskärmen (för felsökning).",
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        )
+                    }
+                    androidx.compose.material3.Switch(
+                        checked = settings.trackLogEnabled,
+                        onCheckedChange = viewModel::setTrackLog,
+                    )
+                }
+            }
+
+            SettingsCard(title = "Vilotimerns utseende") {
+                RadioRow(
+                    label = "Helskärm",
+                    description = "Timern tar över skärmen mellan seten",
+                    selected = settings.restTimerStyle == RestTimerStyle.FULLSCREEN,
+                    onClick = { viewModel.setStyle(RestTimerStyle.FULLSCREEN) },
+                )
+                RadioRow(
+                    label = "Liten banner",
+                    description = "Diskret rad längst ner på pass-sidan",
+                    selected = settings.restTimerStyle == RestTimerStyle.BANNER,
+                    onClick = { viewModel.setStyle(RestTimerStyle.BANNER) },
+                )
+            }
+
+            SettingsCard(title = "När vilan är klar") {
+                RadioRow(
+                    label = "Larmljud",
+                    description = "Spelar notissignalen",
+                    selected = settings.restAlert == RestAlert.SOUND,
+                    onClick = { viewModel.setAlert(RestAlert.SOUND) },
+                )
+                RadioRow(
+                    label = "Vibration",
+                    description = "Telefonen vibrerar",
+                    selected = settings.restAlert == RestAlert.VIBRATE,
+                    onClick = { viewModel.setAlert(RestAlert.VIBRATE) },
+                )
+                RadioRow(
+                    label = "Bara visuellt",
+                    description = "Timern byter utseende, inget ljud eller surr",
+                    selected = settings.restAlert == RestAlert.VISUAL,
+                    onClick = { viewModel.setAlert(RestAlert.VISUAL) },
+                )
+                RadioRow(
+                    label = "Ingenting",
+                    description = "Timern försvinner tyst",
+                    selected = settings.restAlert == RestAlert.NONE,
+                    onClick = { viewModel.setAlert(RestAlert.NONE) },
+                )
+            }
+
+            SettingsCard(title = "Viktsteg för + / − i passläget") {
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(horizontal = 16.dp, vertical = 8.dp),
+                    horizontalArrangement = Arrangement.spacedBy(8.dp),
+                ) {
+                    listOf(1.25, 2.5, 5.0).forEach { step ->
+                        androidx.compose.material3.FilterChip(
+                            selected = settings.weightStep == step,
+                            onClick = { viewModel.setWeightStep(step) },
+                            label = {
+                                Text(if (step % 1.0 == 0.0) "${step.toInt()} kg" else "$step kg")
+                            },
+                            modifier = Modifier.weight(1f),
+                        )
+                    }
+                }
+            }
+
+            SettingsCard(title = "Skivkalkylatorn — egna stänger") {
+                androidx.compose.foundation.lazy.LazyRow(
+                    horizontalArrangement = Arrangement.spacedBy(8.dp),
+                    contentPadding = androidx.compose.foundation.layout.PaddingValues(horizontal = 16.dp),
+                ) {
+                    items(settings.customBarWeights.size) { i ->
+                        val bar = settings.customBarWeights[i]
+                        androidx.compose.material3.InputChip(
+                            selected = false,
+                            onClick = { viewModel.removeCustomBar(bar) },
+                            label = {
+                                Text(
+                                    if (bar % 1.0 == 0.0) "${bar.toInt()} kg" else "$bar kg".replace('.', ',')
+                                )
+                            },
+                            trailingIcon = {
+                                androidx.compose.material3.Icon(
+                                    Icons.Default.Close,
+                                    contentDescription = "Ta bort",
+                                )
+                            },
+                        )
+                    }
+                }
+                var newBar by androidx.compose.runtime.remember {
+                    androidx.compose.runtime.mutableStateOf("")
+                }
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(horizontal = 16.dp, vertical = 6.dp),
+                    verticalAlignment = Alignment.CenterVertically,
+                    horizontalArrangement = Arrangement.spacedBy(8.dp),
+                ) {
+                    androidx.compose.material3.OutlinedTextField(
+                        value = newBar,
+                        onValueChange = { newBar = it },
+                        label = { Text("Ny stångvikt (t.ex. 13,7)") },
+                        singleLine = true,
+                        keyboardOptions = androidx.compose.foundation.text.KeyboardOptions(
+                            keyboardType = androidx.compose.ui.text.input.KeyboardType.Decimal,
+                        ),
+                        modifier = Modifier.weight(1f),
+                    )
+                    FilledTonalButton(onClick = {
+                        newBar.trim().replace(',', '.').toDoubleOrNull()?.let {
+                            viewModel.addCustomBar(it)
+                            newBar = ""
+                        }
+                    }) { Text("Lägg till") }
+                }
+                Text(
+                    "Snabbvalen 20 kg och utan stång finns alltid i kalkylatorn.",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(start = 16.dp, end = 16.dp, bottom = 12.dp),
+                )
+            }
+
+            SettingsCard(title = "Inloggning") {
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(horizontal = 16.dp, vertical = 6.dp),
+                    verticalAlignment = Alignment.CenterVertically,
+                ) {
+                    Column(modifier = Modifier.weight(1f)) {
+                        Text("Automatisk återinloggning", style = MaterialTheme.typography.bodyLarge)
+                        Text(
+                            "Sparar inloggningen krypterat (Android Keystore) och loggar " +
+                                "in igen tyst om servern kastat ut dig. " +
+                                "Aktiveras vid nästa inloggning.",
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        )
+                    }
+                    androidx.compose.material3.Switch(
+                        checked = settings.autoRelogin,
+                        onCheckedChange = viewModel::setAutoRelogin,
+                    )
+                }
+                val apiUrl by viewModel.apiUrl.collectAsStateWithLifecycle()
+                androidx.compose.material3.OutlinedTextField(
+                    value = apiUrl,
+                    onValueChange = viewModel::onApiUrlChange,
+                    label = { Text("API-url") },
+                    singleLine = true,
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(horizontal = 16.dp, vertical = 6.dp),
+                    trailingIcon = {
+                        androidx.compose.material3.TextButton(onClick = viewModel::saveApiUrl) {
+                            Text("Spara")
+                        }
+                    },
+                )
+                Text(
+                    "Gäller från nästa anrop. Standard: https://gymapi.brasse-pc.eu/graphql",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(start = 16.dp, end = 16.dp, bottom = 12.dp),
+                )
+            }
+
+            SettingsCard(title = "Standardvila mellan set") {
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(horizontal = 16.dp, vertical = 8.dp),
+                    verticalAlignment = Alignment.CenterVertically,
+                    horizontalArrangement = Arrangement.spacedBy(12.dp),
+                ) {
+                    FilledTonalButton(onClick = { viewModel.adjustRestSeconds(-15) }) { Text("−15 s") }
+                    Text(
+                        "${settings.defaultRestSeconds} s",
+                        style = MaterialTheme.typography.headlineSmall,
+                        fontWeight = FontWeight.Bold,
+                        modifier = Modifier.weight(1f),
+                        textAlign = androidx.compose.ui.text.style.TextAlign.Center,
+                    )
+                    FilledTonalButton(onClick = { viewModel.adjustRestSeconds(15) }) { Text("+15 s") }
+                }
+                Text(
+                    "Övningar kan få egen vilotid via API:t — då gäller den istället.",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(start = 16.dp, end = 16.dp, bottom = 12.dp),
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun SettingsCard(title: String, content: @Composable () -> Unit) {
+    Card(modifier = Modifier.fillMaxWidth()) {
+        Column {
+            Text(
+                title,
+                style = MaterialTheme.typography.titleSmall,
+                modifier = Modifier.padding(start = 16.dp, top = 14.dp, bottom = 4.dp),
+            )
+            content()
+        }
+    }
+}
+
+@Composable
+private fun StepperRow(
+    label: String,
+    value: String,
+    onMinus: () -> Unit,
+    onPlus: () -> Unit,
+) {
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(horizontal = 16.dp, vertical = 2.dp),
+        verticalAlignment = Alignment.CenterVertically,
+    ) {
+        Text(label, modifier = Modifier.weight(1f), style = MaterialTheme.typography.bodyLarge)
+        FilledTonalButton(onClick = onMinus) { Text("−") }
+        Text(
+            value,
+            modifier = Modifier.padding(horizontal = 10.dp),
+            style = MaterialTheme.typography.titleSmall,
+        )
+        FilledTonalButton(onClick = onPlus) { Text("+") }
+    }
+}
+
+@Composable
+private fun RadioRow(label: String, description: String, selected: Boolean, onClick: () -> Unit) {
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .selectable(selected = selected, onClick = onClick)
+            .padding(horizontal = 16.dp, vertical = 6.dp),
+        verticalAlignment = Alignment.CenterVertically,
+    ) {
+        RadioButton(selected = selected, onClick = onClick)
+        Column(modifier = Modifier.padding(start = 8.dp)) {
+            Text(label, style = MaterialTheme.typography.bodyLarge)
+            Text(
+                description,
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+        }
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/ui/stats/BodyHeatMap.kt

@@ -0,0 +1,133 @@
+package eu.brassepc.fitnessdroid.ui.stats
+
+import androidx.compose.foundation.Canvas
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.size
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.geometry.CornerRadius
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.geometry.Size
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.drawscope.DrawScope
+import androidx.compose.ui.graphics.lerp
+import androidx.compose.ui.unit.dp
+
+/**
+ * Stiliserad kroppskarta (fram + bak) där muskelgruppernas volym färgas som
+ * värme. Samma formspråk som designförslaget: byggd av enkla former, tydlig
+ * i litet format, temafärgad.
+ */
+
+/** Zon-nycklar på figuren. En muskelgrupp kan värma flera zoner. */
+private enum class Zone { SHOULDERS, CHEST, ARMS, FOREARMS, CORE, QUADS, CALVES, TRAPS, BACK, LOWERBACK, GLUTES, HAMSTRINGS }
+
+/** Muskelgruppnamn (svenska/engelska heuristik) → zoner. */
+private fun zonesFor(groupName: String): List<Zone> {
+    val n = groupName.lowercase()
+    return when {
+        "bröst" in n || "chest" in n -> listOf(Zone.CHEST)
+        "axl" in n || "shoulder" in n || "delt" in n -> listOf(Zone.SHOULDERS, Zone.TRAPS)
+        "arm" in n || "bicep" in n || "tricep" in n -> listOf(Zone.ARMS, Zone.FOREARMS)
+        "rygg" in n || "back" in n || "lat" in n -> listOf(Zone.BACK, Zone.LOWERBACK)
+        "mage" in n || "core" in n || "abs" in n || "bål" in n -> listOf(Zone.CORE)
+        "vad" in n || "calv" in n -> listOf(Zone.CALVES)
+        "ben" in n || "leg" in n || "quad" in n || "glut" in n || "hamstring" in n ->
+            listOf(Zone.QUADS, Zone.GLUTES, Zone.HAMSTRINGS)
+        else -> emptyList()
+    }
+}
+
+@Composable
+fun BodyHeatMap(
+    muscleVolumes: Map<String, Double>,
+    baseColor: Color,
+    hotColor: Color,
+    modifier: Modifier = Modifier,
+) {
+    val zoneHeat = HashMap<Zone, Double>()
+    muscleVolumes.forEach { (group, volume) ->
+        zonesFor(group).forEach { zone ->
+            zoneHeat[zone] = (zoneHeat[zone] ?: 0.0) + volume
+        }
+    }
+    val max = zoneHeat.values.maxOrNull()?.takeIf { it > 0 } ?: 1.0
+    fun heat(zone: Zone): Color =
+        lerp(baseColor, hotColor, ((zoneHeat[zone] ?: 0.0) / max).toFloat().coerceIn(0f, 1f))
+
+    Row(modifier = modifier) {
+        Canvas(modifier = Modifier.size(120.dp, 234.dp)) {
+            drawFigureFront(::heat)
+        }
+        Canvas(modifier = Modifier.size(120.dp, 234.dp)) {
+            drawFigureBack(::heat)
+        }
+    }
+}
+
+/* Koordinatsystem 100×195 (som designförslaget), skalas till canvasen. */
+private fun DrawScope.px(x: Double, y: Double, w: Double, h: Double, r: Double, color: Color) {
+    val sx = size.width / 100f
+    val sy = size.height / 195f
+    drawRoundRect(
+        color = color,
+        topLeft = Offset((x * sx).toFloat(), (y * sy).toFloat()),
+        size = Size((w * sx).toFloat(), (h * sy).toFloat()),
+        cornerRadius = CornerRadius((r * sx).toFloat()),
+    )
+}
+
+private fun DrawScope.head(neutral: Color) {
+    val sx = size.width / 100f
+    val sy = size.height / 195f
+    drawCircle(neutral, radius = 9f * sx, center = Offset(50f * sx, 12f * sy))
+}
+
+private fun DrawScope.drawFigureFront(heat: (Zone) -> Color) {
+    val neutral = heat(Zone.CORE).copy(alpha = 0.25f)
+    head(neutral)
+    px(43.0, 22.0, 14.0, 7.0, 3.0, neutral)                     // hals
+    // axlar
+    px(26.0, 30.0, 15.0, 12.0, 6.0, heat(Zone.SHOULDERS))
+    px(59.0, 30.0, 15.0, 12.0, 6.0, heat(Zone.SHOULDERS))
+    // bröst
+    px(33.0, 34.0, 15.0, 14.0, 6.0, heat(Zone.CHEST))
+    px(52.0, 34.0, 15.0, 14.0, 6.0, heat(Zone.CHEST))
+    // mage/core
+    px(36.0, 50.0, 28.0, 26.0, 8.0, heat(Zone.CORE))
+    // överarmar + underarmar
+    px(22.0, 40.0, 8.0, 24.0, 4.0, heat(Zone.ARMS))
+    px(70.0, 40.0, 8.0, 24.0, 4.0, heat(Zone.ARMS))
+    px(21.0, 66.0, 7.0, 20.0, 3.5, heat(Zone.FOREARMS))
+    px(72.0, 66.0, 7.0, 20.0, 3.5, heat(Zone.FOREARMS))
+    // lår
+    px(34.0, 80.0, 13.0, 42.0, 6.0, heat(Zone.QUADS))
+    px(53.0, 80.0, 13.0, 42.0, 6.0, heat(Zone.QUADS))
+    // smalben (neutralt fram)
+    px(36.0, 126.0, 10.0, 30.0, 5.0, neutral)
+    px(54.0, 126.0, 10.0, 30.0, 5.0, neutral)
+}
+
+private fun DrawScope.drawFigureBack(heat: (Zone) -> Color) {
+    val neutral = heat(Zone.CORE).copy(alpha = 0.25f)
+    head(neutral)
+    // trapezius/nacke
+    px(40.0, 22.0, 20.0, 10.0, 4.0, heat(Zone.TRAPS))
+    // rygg (lats)
+    px(34.0, 33.0, 32.0, 22.0, 8.0, heat(Zone.BACK))
+    // ländrygg
+    px(38.0, 57.0, 24.0, 18.0, 7.0, heat(Zone.LOWERBACK))
+    // armar bak
+    px(22.0, 40.0, 8.0, 24.0, 4.0, heat(Zone.ARMS))
+    px(70.0, 40.0, 8.0, 24.0, 4.0, heat(Zone.ARMS))
+    px(21.0, 66.0, 7.0, 20.0, 3.5, heat(Zone.FOREARMS))
+    px(72.0, 66.0, 7.0, 20.0, 3.5, heat(Zone.FOREARMS))
+    // säte
+    px(35.0, 77.0, 30.0, 14.0, 6.0, heat(Zone.GLUTES))
+    // baksida lår
+    px(34.0, 93.0, 13.0, 32.0, 6.0, heat(Zone.HAMSTRINGS))
+    px(53.0, 93.0, 13.0, 32.0, 6.0, heat(Zone.HAMSTRINGS))
+    // vader
+    px(36.0, 128.0, 10.0, 28.0, 5.0, heat(Zone.CALVES))
+    px(54.0, 128.0, 10.0, 28.0, 5.0, heat(Zone.CALVES))
+}

app/src/main/java/eu/brassepc/fitnessdroid/ui/stats/CompositionGraph.kt

@@ -0,0 +1,57 @@
+package eu.brassepc.fitnessdroid.ui.stats
+
+import androidx.compose.foundation.Canvas
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.Path
+import androidx.compose.ui.graphics.drawscope.Stroke
+import androidx.compose.ui.unit.dp
+import eu.brassepc.fitnessdroid.data.BodyMeasurement
+import java.time.OffsetDateTime
+
+data class CompositionSeries(val label: String, val color: Color, val values: List<Double?>)
+
+/**
+ * Flerlinjes-graf för kroppssammansättning över tid. Varje serie (muskel/
+ * fett/vatten) ritas som egen linje; null-värden hoppas över (spanGaps).
+ * Delar tidsordningen med [WeightGraph].
+ */
+@Composable
+fun CompositionGraph(
+    measurements: List<BodyMeasurement>,
+    series: List<CompositionSeries>,
+    modifier: Modifier = Modifier,
+) {
+    val order = measurements.mapIndexedNotNull { i, m ->
+        runCatching { OffsetDateTime.parse(m.date).toInstant().toEpochMilli() }.getOrNull()?.let { i to it }
+    }.sortedBy { it.second }.map { it.first }
+    if (order.size < 2) return
+
+    val allValues = series.flatMap { it.values }.filterNotNull()
+    if (allValues.isEmpty()) return
+    val lo = allValues.min() * 0.9
+    val hi = allValues.max() * 1.1
+    val span = (hi - lo).takeIf { it > 0 } ?: 1.0
+
+    Canvas(modifier = modifier.fillMaxWidth().height(160.dp)) {
+        fun x(idx: Int) = idx / (order.size - 1).toFloat() * size.width
+        fun y(v: Double) = (size.height - ((v - lo) / span).toFloat() * size.height)
+
+        series.forEach { s ->
+            val path = Path()
+            var started = false
+            order.forEachIndexed { plotIdx, measurementIdx ->
+                val v = s.values.getOrNull(measurementIdx) ?: return@forEachIndexed
+                val px = x(plotIdx)
+                val py = y(v)
+                if (!started) { path.moveTo(px, py); started = true } else path.lineTo(px, py)
+                drawCircle(s.color, radius = 5f, center = Offset(px, py))
+            }
+            if (started) drawPath(path, color = s.color, style = Stroke(width = 4f))
+        }
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/ui/stats/StatsScreen.kt

@@ -0,0 +1,682 @@
+package eu.brassepc.fitnessdroid.ui.stats
+
+import androidx.compose.foundation.background
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Favorite
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.FilterChip
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.lifecycle.viewmodel.initializer
+import androidx.lifecycle.viewmodel.viewModelFactory
+import eu.brassepc.fitnessdroid.data.GymRepository
+import eu.brassepc.fitnessdroid.data.StatsBundle
+import eu.brassepc.fitnessdroid.ui.appContainer
+import eu.brassepc.fitnessdroid.ui.common.compact
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.launch
+
+data class PeriodOption(val id: String, val label: String)
+
+val PERIODS = listOf(
+    PeriodOption("week", "Vecka"),
+    PeriodOption("month", "Månad"),
+    PeriodOption("halfyear", "Halvår"),
+    PeriodOption("year", "År"),
+    PeriodOption("all", "Totalt"),
+)
+
+sealed interface StatsUiState {
+    data object Loading : StatsUiState
+    data class Error(val message: String) : StatsUiState
+    data class Ready(val stats: StatsBundle) : StatsUiState
+}
+
+class StatsViewModel(
+    private val repo: GymRepository,
+    private val gymApi: eu.brassepc.fitnessdroid.data.GymApi,
+) : ViewModel() {
+    val period = MutableStateFlow("month")
+    val uiState = MutableStateFlow<StatsUiState>(StatsUiState.Loading)
+    val bodyMeasurements = MutableStateFlow<List<eu.brassepc.fitnessdroid.data.BodyMeasurement>>(emptyList())
+    val activities = MutableStateFlow<List<eu.brassepc.fitnessdroid.data.Activity>>(emptyList())
+
+    private fun periodStart(): java.time.Instant? {
+        val now = java.time.Instant.now()
+        return when (period.value) {
+            "week" -> now.minus(java.time.Duration.ofDays(7))
+            "month" -> now.minus(java.time.Duration.ofDays(30))
+            "halfyear" -> now.minus(java.time.Duration.ofDays(182))
+            "year" -> now.minus(java.time.Duration.ofDays(365))
+            else -> null
+        }
+    }
+
+    private fun refreshActivities() {
+        viewModelScope.launch {
+            runCatching {
+                val all = gymApi.activities(limit = 500)
+                val start = periodStart()
+                activities.value = if (start == null) all else all.filter {
+                    runCatching { java.time.OffsetDateTime.parse(it.startedAt).toInstant() >= start }
+                        .getOrDefault(false)
+                }
+            }
+        }
+    }
+
+    init {
+        load()
+        refreshMeasurements()
+        refreshActivities()
+    }
+
+    fun refreshMeasurements() {
+        viewModelScope.launch {
+            runCatching { bodyMeasurements.value = repo.fetchBodyMeasurements() }
+        }
+    }
+
+    fun setPeriod(id: String) {
+        if (period.value == id) return
+        period.value = id
+        load()
+        refreshActivities()
+    }
+
+    fun load() {
+        uiState.value = StatsUiState.Loading
+        viewModelScope.launch {
+            uiState.value = try {
+                StatsUiState.Ready(repo.fetchStats(period.value))
+            } catch (e: Exception) {
+                StatsUiState.Error("Kunde inte hämta statistiken — offline?")
+            }
+        }
+    }
+
+    companion object {
+        val Factory: ViewModelProvider.Factory = viewModelFactory {
+            initializer {
+                val c = appContainer()
+                StatsViewModel(c.gymRepository, c.gymApi)
+            }
+        }
+    }
+}
+
+@Composable
+fun StatsScreen(viewModel: StatsViewModel = viewModel(factory = StatsViewModel.Factory)) {
+    val uiState by viewModel.uiState.collectAsStateWithLifecycle()
+    val period by viewModel.period.collectAsStateWithLifecycle()
+
+    // Hämta om mätningarna varje gång fliken öppnas — ny vikt kan ha
+    // lagts in via profilen sedan sist.
+    androidx.compose.runtime.LaunchedEffect(Unit) {
+        viewModel.refreshMeasurements()
+    }
+
+    LazyColumn(
+        modifier = Modifier.fillMaxSize(),
+        contentPadding = androidx.compose.foundation.layout.PaddingValues(16.dp),
+        verticalArrangement = Arrangement.spacedBy(12.dp),
+    ) {
+        item {
+            Text("Statistik", style = MaterialTheme.typography.headlineSmall)
+        }
+        item {
+            androidx.compose.foundation.lazy.LazyRow(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                items(PERIODS, key = { it.id }) { p ->
+                    FilterChip(
+                        selected = period == p.id,
+                        onClick = { viewModel.setPeriod(p.id) },
+                        label = { Text(p.label) },
+                    )
+                }
+            }
+        }
+
+        when (val state = uiState) {
+            is StatsUiState.Loading -> item {
+                Box(
+                    modifier = Modifier.fillMaxWidth().padding(48.dp),
+                    contentAlignment = Alignment.Center,
+                ) { CircularProgressIndicator() }
+            }
+            is StatsUiState.Error -> item {
+                Column(
+                    modifier = Modifier.fillMaxWidth().padding(32.dp),
+                    horizontalAlignment = Alignment.CenterHorizontally,
+                ) {
+                    Text(state.message, color = MaterialTheme.colorScheme.onSurfaceVariant)
+                    Button(onClick = viewModel::load, modifier = Modifier.padding(top = 12.dp)) {
+                        Text("Försök igen")
+                    }
+                }
+            }
+            is StatsUiState.Ready -> {
+                val stats = state.stats
+
+                item {
+                    Row(horizontalArrangement = Arrangement.spacedBy(10.dp)) {
+                        KpiCard("Pass", "${stats.sessionCount}", delta(stats.sessionCount.toDouble(), stats.prevSessionCount?.toDouble()), Modifier.weight(1f))
+                        KpiCard("Tid", "${stats.totalDurationMinutes / 60}h ${stats.totalDurationMinutes % 60}m", delta(stats.totalDurationMinutes.toDouble(), stats.prevDurationMinutes?.toDouble()), Modifier.weight(1f))
+                    }
+                }
+                item {
+                    Row(horizontalArrangement = Arrangement.spacedBy(10.dp)) {
+                        KpiCard("Volym", "${stats.totalVolumeKg.toInt()} kg", delta(stats.totalVolumeKg, stats.prevVolumeKg), Modifier.weight(1f))
+                        KpiCard("Kalorier", "${stats.totalCalories.toInt()} kcal", delta(stats.totalCalories, stats.prevCalories), Modifier.weight(1f))
+                    }
+                }
+                item {
+                    Row(horizontalArrangement = Arrangement.spacedBy(10.dp)) {
+                        KpiCard("Streak", "${stats.streakWeeks} v", null, Modifier.weight(1f))
+                        KpiCard("Pass/vecka", "%.1f".format(stats.sessionsPerWeek), null, Modifier.weight(1f))
+                    }
+                }
+
+                item {
+                    val periodActivities by viewModel.activities.collectAsStateWithLifecycle()
+                    CardioCard(periodActivities)
+                }
+
+                if (stats.trend.size > 1) {
+                    item {
+                        Card(modifier = Modifier.fillMaxWidth()) {
+                            Column(modifier = Modifier.padding(14.dp)) {
+                                Text(
+                                    "Volym per " + when (period) {
+                                        "week", "month" -> "dag"
+                                        "halfyear" -> "vecka"
+                                        else -> "månad"
+                                    },
+                                    style = MaterialTheme.typography.titleSmall,
+                                )
+                                TrendBars(stats)
+                            }
+                        }
+                    }
+                }
+
+                item {
+                    Card(modifier = Modifier.fillMaxWidth()) {
+                        Column(modifier = Modifier.padding(14.dp)) {
+                            Text("Var hamnade volymen?", style = MaterialTheme.typography.titleSmall)
+                            if (stats.muscleVolumes.isEmpty()) {
+                                Text(
+                                    "Ingen loggad volym i perioden.",
+                                    style = MaterialTheme.typography.bodySmall,
+                                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                    modifier = Modifier.padding(top = 6.dp),
+                                )
+                            } else {
+                                Row(
+                                    modifier = Modifier.fillMaxWidth().padding(top = 10.dp),
+                                    horizontalArrangement = Arrangement.SpaceEvenly,
+                                ) {
+                                    BodyHeatMap(
+                                        muscleVolumes = stats.muscleVolumes,
+                                        baseColor = MaterialTheme.colorScheme.surfaceVariant,
+                                        hotColor = MaterialTheme.colorScheme.primary,
+                                    )
+                                }
+                                Row(
+                                    modifier = Modifier.fillMaxWidth().padding(top = 8.dp),
+                                    horizontalArrangement = Arrangement.SpaceBetween,
+                                ) {
+                                    Text("Framsida", style = MaterialTheme.typography.labelSmall, color = MaterialTheme.colorScheme.onSurfaceVariant)
+                                    Text("Mörkare = mer volym", style = MaterialTheme.typography.labelSmall, color = MaterialTheme.colorScheme.onSurfaceVariant)
+                                    Text("Baksida", style = MaterialTheme.typography.labelSmall, color = MaterialTheme.colorScheme.onSurfaceVariant)
+                                }
+                                stats.muscleVolumes.entries.sortedByDescending { it.value }.take(3)
+                                    .let { top ->
+                                        Text(
+                                            "Mest: " + top.joinToString(" · ") { "${it.key} ${it.value.toInt()} kg" },
+                                            style = MaterialTheme.typography.bodySmall,
+                                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                            modifier = Modifier.padding(top = 8.dp),
+                                        )
+                                    }
+                            }
+                        }
+                    }
+                }
+
+                item {
+                    val measurements by viewModel.bodyMeasurements.collectAsStateWithLifecycle()
+                    if (measurements.size >= 2) {
+                        Card(modifier = Modifier.fillMaxWidth()) {
+                            Column(modifier = Modifier.padding(14.dp)) {
+                                Row {
+                                    Text(
+                                        "Kroppsvikt",
+                                        style = MaterialTheme.typography.titleSmall,
+                                        modifier = Modifier.weight(1f),
+                                    )
+                                    Text(
+                                        "${measurements.last().weightKg.compact()} kg nu",
+                                        style = MaterialTheme.typography.titleSmall,
+                                        color = MaterialTheme.colorScheme.primary,
+                                    )
+                                }
+                                WeightGraph(
+                                    measurements = measurements,
+                                    lineColor = MaterialTheme.colorScheme.primary,
+                                    trendColor = MaterialTheme.colorScheme.tertiary,
+                                    pointColor = MaterialTheme.colorScheme.onSurfaceVariant,
+                                    modifier = Modifier.padding(top = 10.dp),
+                                )
+                                Row(
+                                    modifier = Modifier.fillMaxWidth().padding(top = 6.dp),
+                                    horizontalArrangement = Arrangement.SpaceBetween,
+                                ) {
+                                    Text(
+                                        measurements.first().date.take(10),
+                                        style = MaterialTheme.typography.labelSmall,
+                                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                    )
+                                    Text(
+                                        "— mjuk linje · - - trend",
+                                        style = MaterialTheme.typography.labelSmall,
+                                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                    )
+                                    Text(
+                                        measurements.last().date.take(10),
+                                        style = MaterialTheme.typography.labelSmall,
+                                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                    )
+                                }
+                            }
+                        }
+                    }
+                }
+
+                item {
+                    val measurements by viewModel.bodyMeasurements.collectAsStateWithLifecycle()
+                    val hasComposition = measurements.any {
+                        it.musclePercent != null || it.fatPercent != null || it.waterPercent != null
+                    }
+                    if (measurements.size >= 2 && hasComposition) {
+                        CompositionCard(measurements)
+                    }
+                }
+
+                if (stats.heaviestLift != null || stats.newPrCount > 0) {
+                    item {
+                        Card(modifier = Modifier.fillMaxWidth()) {
+                            Column(modifier = Modifier.padding(14.dp), verticalArrangement = Arrangement.spacedBy(4.dp)) {
+                                Text("Höjdpunkter", style = MaterialTheme.typography.titleSmall)
+                                stats.heaviestLift?.let { Text("🏋 Tyngsta lyft: $it", style = MaterialTheme.typography.bodySmall) }
+                                if (stats.newPrCount > 0) {
+                                    Text("🏆 ${stats.newPrCount} nya personbästa i perioden", style = MaterialTheme.typography.bodySmall)
+                                }
+                            }
+                        }
+                    }
+                }
+
+                if (stats.personalBests.isNotEmpty()) {
+                    item {
+                        Text(
+                            "Personbästa",
+                            style = MaterialTheme.typography.titleMedium,
+                            modifier = Modifier.padding(top = 6.dp),
+                        )
+                    }
+                    items(stats.personalBests, key = { it.exerciseName }) { pb ->
+                        Card(modifier = Modifier.fillMaxWidth()) {
+                            Column(modifier = Modifier.padding(14.dp)) {
+                                Text(pb.exerciseName, style = MaterialTheme.typography.titleSmall)
+                                Text(
+                                    pb.records.joinToString("   ") { "${it.reps}RM ${it.weight.compact()}kg" },
+                                    style = MaterialTheme.typography.bodySmall,
+                                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                    modifier = Modifier.padding(top = 4.dp),
+                                )
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+private data class CompPart(val label: String, val value: (eu.brassepc.fitnessdroid.data.BodyMeasurement) -> Double?)
+
+@Composable
+private fun CompositionCard(measurements: List<eu.brassepc.fitnessdroid.data.BodyMeasurement>) {
+    var showKg by remember { mutableStateOf(false) }
+    val latest = measurements.last()
+
+    val muscle = MaterialTheme.colorScheme.primary
+    val fat = MaterialTheme.colorScheme.tertiary
+    val water = MaterialTheme.colorScheme.secondary
+
+    val parts = listOf(
+        Triple("Muskler", muscle, CompPart("Muskler") { it.musclePercent }),
+        Triple("Fett", fat, CompPart("Fett") { it.fatPercent }),
+        Triple("Vatten", water, CompPart("Vatten") { it.waterPercent }),
+    ).filter { (_, _, p) -> measurements.any { p.value(it) != null } }
+
+    fun kgOf(m: eu.brassepc.fitnessdroid.data.BodyMeasurement, pct: Double?): Double? =
+        if (pct == null) null else m.weightKg * pct / 100.0
+
+    Card(modifier = Modifier.fillMaxWidth()) {
+        Column(modifier = Modifier.padding(14.dp)) {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                Text(
+                    "Sammansättning",
+                    style = MaterialTheme.typography.titleSmall,
+                    modifier = Modifier.weight(1f),
+                )
+                // %/kg-växel
+                Row(horizontalArrangement = Arrangement.spacedBy(6.dp)) {
+                    FilterChip(
+                        selected = !showKg,
+                        onClick = { showKg = false },
+                        label = { Text("%") },
+                    )
+                    FilterChip(
+                        selected = showKg,
+                        onClick = { showKg = true },
+                        label = { Text("kg") },
+                    )
+                }
+            }
+
+            // Senaste värden: % + omräknat till kg
+            Row(
+                modifier = Modifier.fillMaxWidth().padding(top = 10.dp),
+                horizontalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                parts.forEach { (label, color, part) ->
+                    val pct = part.value(latest)
+                    val kg = kgOf(latest, pct)
+                    Column(modifier = Modifier.weight(1f)) {
+                        Text(label, style = MaterialTheme.typography.labelSmall, color = color)
+                        Text(
+                            pct?.let { "${it.compact()}%" } ?: "–",
+                            style = MaterialTheme.typography.titleMedium,
+                            fontWeight = FontWeight.Bold,
+                        )
+                        Text(
+                            kg?.let { "≈ ${it.compact()} kg" } ?: "",
+                            style = MaterialTheme.typography.labelSmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        )
+                    }
+                }
+            }
+
+            CompositionGraph(
+                measurements = measurements,
+                series = parts.map { (label, color, part) ->
+                    CompositionSeries(
+                        label = label,
+                        color = color,
+                        values = measurements.map { m ->
+                            val pct = part.value(m)
+                            if (showKg) kgOf(m, pct) else pct
+                        },
+                    )
+                },
+                modifier = Modifier.padding(top = 12.dp),
+            )
+            Text(
+                if (showKg) "Faktisk vikt per del (kg)" else "Andel av kroppsvikten (%)",
+                style = MaterialTheme.typography.labelSmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                modifier = Modifier.padding(top = 6.dp),
+            )
+        }
+    }
+}
+
+private fun delta(current: Double, previous: Double?): String? {
+    previous ?: return null
+    if (previous == 0.0) return null
+    val pct = ((current - previous) / previous * 100).toInt()
+    return if (pct >= 0) "+$pct%" else "$pct%"
+}
+
+@Composable
+private fun KpiCard(label: String, value: String, deltaText: String?, modifier: Modifier = Modifier) {
+    Card(modifier = modifier) {
+        Column(modifier = Modifier.padding(12.dp)) {
+            Text(
+                label,
+                style = MaterialTheme.typography.labelSmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+            Text(value, style = MaterialTheme.typography.titleLarge, fontWeight = FontWeight.Bold)
+            deltaText?.let {
+                Text(
+                    "$it mot förra perioden",
+                    style = MaterialTheme.typography.labelSmall,
+                    color = if (it.startsWith("+")) {
+                        MaterialTheme.colorScheme.primary
+                    } else {
+                        MaterialTheme.colorScheme.onSurfaceVariant
+                    },
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun TrendBars(stats: StatsBundle) {
+    val max = stats.trend.maxOf { it.volumeKg }.takeIf { it > 0 } ?: 1.0
+    val listState = androidx.compose.foundation.lazy.rememberLazyListState()
+
+    // Börja längst till höger — senaste perioden är den intressanta.
+    androidx.compose.runtime.LaunchedEffect(stats.trend.size) {
+        if (stats.trend.isNotEmpty()) listState.scrollToItem(stats.trend.size - 1)
+    }
+
+    androidx.compose.foundation.lazy.LazyRow(
+        state = listState,
+        modifier = Modifier
+            .fillMaxWidth()
+            .height(112.dp)
+            .padding(top = 10.dp),
+        horizontalArrangement = Arrangement.spacedBy(6.dp),
+        verticalAlignment = Alignment.Bottom,
+    ) {
+        items(stats.trend.size) { i ->
+            val bucket = stats.trend[i]
+            Column(
+                modifier = Modifier.width(38.dp),
+                horizontalAlignment = Alignment.CenterHorizontally,
+            ) {
+                if (bucket.volumeKg > 0) {
+                    Text(
+                        if (bucket.volumeKg >= 1000) {
+                            "${(bucket.volumeKg / 1000).toInt()}t"
+                        } else {
+                            "${bucket.volumeKg.toInt()}"
+                        },
+                        style = MaterialTheme.typography.labelSmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        maxLines = 1,
+                    )
+                }
+                Box(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .height(((bucket.volumeKg / max) * 64).dp.coerceAtLeast(2.dp))
+                        .background(
+                            color = MaterialTheme.colorScheme.primary.copy(
+                                alpha = if (bucket.volumeKg > 0) 0.85f else 0.25f,
+                            ),
+                            shape = MaterialTheme.shapes.extraSmall,
+                        ),
+                )
+                Text(
+                    bucket.label,
+                    style = MaterialTheme.typography.labelSmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    maxLines = 1,
+                )
+            }
+        }
+    }
+}
+
+
+/** Konditionssektionen ❤️ — aktiviteter i vald period: KPI, vecko-km och per typ. */
+@Composable
+private fun CardioCard(activities: List<eu.brassepc.fitnessdroid.data.Activity>) {
+    if (activities.isEmpty()) return
+    val totalKm = activities.sumOf { it.distanceMeters ?: 0.0 } / 1000.0
+    val totalMin = activities.sumOf { it.durationSeconds } / 60
+    val totalKcal = activities.sumOf { it.estimatedKcal ?: 0.0 }
+
+    Card(modifier = Modifier.fillMaxWidth()) {
+        Column(
+            modifier = Modifier.padding(14.dp),
+            verticalArrangement = Arrangement.spacedBy(10.dp),
+        ) {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                androidx.compose.material3.Icon(
+                    Icons.Filled.Favorite,
+                    contentDescription = null,
+                    tint = MaterialTheme.colorScheme.primary,
+                )
+                Text(
+                    "Kondition & aktiviteter",
+                    style = MaterialTheme.typography.titleSmall,
+                    modifier = Modifier.padding(start = 8.dp),
+                )
+            }
+            Row(modifier = Modifier.fillMaxWidth()) {
+                CardioKpi("Aktiviteter", "${activities.size}", Modifier.weight(1f))
+                CardioKpi("Distans", "%.1f km".format(totalKm), Modifier.weight(1f))
+                CardioKpi("Tid", "${totalMin / 60}h ${totalMin % 60}m", Modifier.weight(1f))
+                CardioKpi("Kcal", "${totalKcal.toInt()}", Modifier.weight(1f))
+            }
+
+            // Km per vecka (senaste 8 med data)
+            val weekly = activities
+                .mapNotNull { a ->
+                    runCatching {
+                        val d = java.time.OffsetDateTime.parse(a.startedAt)
+                            .atZoneSameInstant(java.time.ZoneId.systemDefault()).toLocalDate()
+                        val week = d.with(java.time.DayOfWeek.MONDAY)
+                        week to (a.distanceMeters ?: 0.0)
+                    }.getOrNull()
+                }
+                .groupBy({ it.first }, { it.second })
+                .mapValues { (_, v) -> v.sum() / 1000.0 }
+                .toSortedMap()
+                .entries.toList().takeLast(8)
+            val maxKm = weekly.maxOfOrNull { it.value } ?: 0.0
+            if (weekly.size > 1 && maxKm > 0) {
+                Text(
+                    "Km per vecka",
+                    style = MaterialTheme.typography.labelMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+                weekly.forEach { (week, km) ->
+                    Row(verticalAlignment = Alignment.CenterVertically) {
+                        Text(
+                            "v${week.get(java.time.temporal.WeekFields.ISO.weekOfWeekBasedYear())}",
+                            style = MaterialTheme.typography.labelSmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                            modifier = Modifier.width(32.dp),
+                        )
+                        androidx.compose.foundation.layout.Box(
+                            modifier = Modifier
+                                .weight(1f)
+                                .height(14.dp),
+                        ) {
+                            androidx.compose.foundation.layout.Box(
+                                modifier = Modifier
+                                    .fillMaxWidth(fraction = (km / maxKm).toFloat().coerceIn(0.02f, 1f))
+                                    .height(14.dp)
+                                    .background(
+                                        MaterialTheme.colorScheme.primary,
+                                        MaterialTheme.shapes.small,
+                                    ),
+                            )
+                        }
+                        Text(
+                            "%.1f".format(km),
+                            style = MaterialTheme.typography.labelSmall,
+                            modifier = Modifier.padding(start = 8.dp),
+                        )
+                    }
+                }
+            }
+
+            // Per typ
+            val byType = activities.groupBy { it.activityType.nameSv }
+                .entries.sortedByDescending { it.value.size }
+            Text(
+                "Per aktivitet",
+                style = MaterialTheme.typography.labelMedium,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+            byType.take(8).forEach { (name, list) ->
+                Row(modifier = Modifier.fillMaxWidth()) {
+                    Text(
+                        name,
+                        style = MaterialTheme.typography.bodySmall,
+                        modifier = Modifier.weight(1f),
+                    )
+                    val km = list.sumOf { it.distanceMeters ?: 0.0 } / 1000.0
+                    Text(
+                        buildString {
+                            append("${list.size} st")
+                            if (km > 0.05) append(" · %.1f km".format(km))
+                            append(" · ${list.sumOf { it.durationSeconds } / 60} min")
+                        },
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun CardioKpi(label: String, value: String, modifier: Modifier = Modifier) {
+    Column(modifier = modifier, horizontalAlignment = Alignment.CenterHorizontally) {
+        Text(
+            label,
+            style = MaterialTheme.typography.labelSmall,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+        Text(value, style = MaterialTheme.typography.titleSmall)
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/ui/stats/WeightGraph.kt

@@ -0,0 +1,93 @@
+package eu.brassepc.fitnessdroid.ui.stats
+
+import androidx.compose.foundation.Canvas
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.Path
+import androidx.compose.ui.graphics.PathEffect
+import androidx.compose.ui.graphics.drawscope.Stroke
+import androidx.compose.ui.unit.dp
+import eu.brassepc.fitnessdroid.data.BodyMeasurement
+import java.time.OffsetDateTime
+
+/**
+ * Kroppsvikt över tid: råpunkter, glidande medelvärde (mjuk linje) och
+ * linjär trendlinje (streckad).
+ */
+@Composable
+fun WeightGraph(
+    measurements: List<BodyMeasurement>,
+    lineColor: Color,
+    trendColor: Color,
+    pointColor: Color,
+    modifier: Modifier = Modifier,
+) {
+    var points = measurements.mapNotNull { m ->
+        runCatching {
+            OffsetDateTime.parse(m.date).toInstant().toEpochMilli().toFloat() to m.weightKg.toFloat()
+        }.getOrNull()
+    }.sortedBy { it.first }
+    if (points.size < 2) return
+
+    // Alla mätningar inom samma dygn? Sprid dem jämnt på index istället,
+    // annars kollapsar hela grafen till en punkt.
+    if (points.last().first - points.first().first < 86_400_000f) {
+        points = points.mapIndexed { i, (_, w) -> i.toFloat() to w }
+    }
+
+    val minX = points.first().first
+    val maxX = points.last().first
+    val minW = points.minOf { it.second }
+    val maxW = points.maxOf { it.second }
+    val padW = ((maxW - minW).takeIf { it > 0f } ?: 1f) * 0.15f
+    val loW = minW - padW
+    val hiW = maxW + padW
+
+    // Glidande medelvärde (fönster 5)
+    val smooth = points.mapIndexed { i, _ ->
+        val from = (i - 2).coerceAtLeast(0)
+        val to = (i + 2).coerceAtMost(points.lastIndex)
+        val slice = points.subList(from, to + 1)
+        points[i].first to slice.map { it.second }.average().toFloat()
+    }
+
+    // Linjär regression för trendlinjen
+    val n = points.size.toFloat()
+    val meanX = points.map { it.first }.average().toFloat()
+    val meanY = points.map { it.second }.average().toFloat()
+    val denominator = points.sumOf { ((it.first - meanX) * (it.first - meanX)).toDouble() }
+    val slope = if (denominator == 0.0) 0f else {
+        (points.sumOf { ((it.first - meanX) * (it.second - meanY)).toDouble() } / denominator).toFloat()
+    }
+    val intercept = meanY - slope * meanX
+
+    Canvas(modifier = modifier.fillMaxWidth().height(160.dp)) {
+        fun x(v: Float) = (v - minX) / (maxX - minX).coerceAtLeast(1f) * size.width
+        fun y(w: Float) = size.height - (w - loW) / (hiW - loW) * size.height
+
+        // Trendlinje (streckad)
+        drawLine(
+            color = trendColor,
+            start = Offset(0f, y(slope * minX + intercept)),
+            end = Offset(size.width, y(slope * maxX + intercept)),
+            strokeWidth = 3f,
+            pathEffect = PathEffect.dashPathEffect(floatArrayOf(14f, 10f)),
+        )
+
+        // Mjuk linje (glidande medelvärde)
+        val path = Path()
+        smooth.forEachIndexed { i, (px, pw) ->
+            if (i == 0) path.moveTo(x(px), y(pw)) else path.lineTo(x(px), y(pw))
+        }
+        drawPath(path, color = lineColor, style = Stroke(width = 5f))
+
+        // Råpunkter
+        points.forEach { (px, pw) ->
+            drawCircle(color = pointColor, radius = 6f, center = Offset(x(px), y(pw)))
+        }
+    }
+}

app/src/main/java/eu/brassepc/fitnessdroid/ui/track/TrackScreen.kt

@@ -0,0 +1,758 @@
+package eu.brassepc.fitnessdroid.ui.track
+
+import android.Manifest
+import android.content.pm.PackageManager
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.Favorite
+import androidx.compose.material.icons.filled.Pause
+import androidx.compose.material.icons.filled.PlayArrow
+import androidx.compose.material.icons.filled.Stop
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Slider
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.toArgb
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.viewinterop.AndroidView
+import androidx.core.content.ContextCompat
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.lifecycle.viewmodel.initializer
+import androidx.lifecycle.viewmodel.viewModelFactory
+import eu.brassepc.fitnessdroid.data.ActivityKcal
+import eu.brassepc.fitnessdroid.data.ActivityType
+import eu.brassepc.fitnessdroid.data.GymApi
+import eu.brassepc.fitnessdroid.data.GymRepository
+import eu.brassepc.fitnessdroid.data.TrackLog
+import eu.brassepc.fitnessdroid.data.TrackingPhase
+import eu.brassepc.fitnessdroid.data.TrackingService
+import eu.brassepc.fitnessdroid.data.TrackingState
+import eu.brassepc.fitnessdroid.data.encodePolyline
+import eu.brassepc.fitnessdroid.ui.activities.RPE_LABELS
+import eu.brassepc.fitnessdroid.ui.appContainer
+import eu.brassepc.fitnessdroid.ui.common.compact
+import eu.brassepc.fitnessdroid.ui.common.openAppSettings
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.launch
+import org.osmdroid.config.Configuration
+import org.osmdroid.tileprovider.tilesource.TileSourceFactory
+import org.osmdroid.util.GeoPoint
+import org.osmdroid.views.MapView
+import org.osmdroid.views.overlay.Polyline
+import java.io.File
+import java.time.Instant
+
+class TrackViewModel(
+    private val gymApi: GymApi,
+    private val repo: GymRepository,
+    private val settingsStore: eu.brassepc.fitnessdroid.data.SettingsStore,
+) : ViewModel() {
+    val tracking = TrackingService.state
+    /** Teknisk logg visas bara om den slagits på i inställningarna. */
+    val logEnabled = settingsStore.settings.map { it.trackLogEnabled }
+    val message = MutableStateFlow<String?>(null)
+    val saved = MutableStateFlow(false)
+    /** Sammanfattningen som visas efter stopp (null = spårning pågår/ej startad) */
+    val summary = MutableStateFlow<TrackingState?>(null)
+
+    val pendingType = MutableStateFlow<ActivityType?>(null)
+    val typeLoadError = MutableStateFlow(false)
+
+    fun loadType(typeId: Int) {
+        viewModelScope.launch {
+            typeLoadError.value = false
+            if (TrackingService.state.value.isActive) return@launch
+            runCatching { gymApi.activityTypes().find { it.id == typeId } }
+                .fold(
+                    onSuccess = { t ->
+                        if (t != null) pendingType.value = t else typeLoadError.value = true
+                    },
+                    onFailure = { typeLoadError.value = true },
+                )
+        }
+    }
+
+    fun start(context: android.content.Context) {
+        val type = pendingType.value ?: return
+        viewModelScope.launch {
+            val cfg = settingsStore.settings.first()
+            TrackingService.start(
+                context, type, repo.bodyWeightKg(),
+                gpsAccuracyLimitM = cfg.gpsAccuracyLimitM,
+                gpsSpeedFactor = cfg.gpsSpeedFactor,
+                gpsSpeedFloorKmh = cfg.gpsSpeedFloorKmh,
+                motionGuardEnabled = cfg.motionGuardEnabled,
+                motionThreshold = cfg.motionThreshold,
+                countdownSeconds = cfg.countdownSeconds,
+            )
+        }
+    }
+
+    fun stop(context: android.content.Context) {
+        summary.value = tracking.value
+        TrackingService.stop(context)
+    }
+
+    fun save(rpe: Double?, overrideTypeId: Int?) {
+        val s = summary.value ?: return
+        viewModelScope.launch {
+            val startedIso = Instant.ofEpochMilli(s.startedAtEpochMs).toString()
+            val distance = s.distanceMeters.takeIf { s.isDistanceBased && it > 10 }
+            val elevation = s.elevationGainMeters.takeIf { s.isDistanceBased && it > 1 }
+            // Banta rutten före sparning — Douglas-Peucker 4 m + tak 800 punkter
+            val polyline = s.points.takeIf { it.size >= 2 }
+                ?.let { eu.brassepc.fitnessdroid.data.simplifyRoute(it) }
+                ?.let { if (it.size > 800) it.filterIndexed { i, _ -> i % (it.size / 800 + 1) == 0 } else it }
+                ?.let { encodePolyline(it) }
+            try {
+                gymApi.addActivity(
+                    activityTypeId = overrideTypeId ?: s.typeId,
+                    startedAtIso = startedIso,
+                    durationSeconds = s.elapsedSeconds.coerceAtLeast(1),
+                    distanceMeters = distance,
+                    elevationGainMeters = elevation,
+                    rpe = rpe,
+                    source = "tracked",
+                    routePolyline = polyline,
+                    steps = s.steps?.takeIf { it > 0 },
+                )
+                saved.value = true
+                message.value = null
+                TrackLog.log("sparad på servern")
+            } catch (e: Exception) {
+                // Offline → köa lokalt, synk-kön skickar när nätet är tillbaka
+                runCatching {
+                    repo.queueActivity(
+                        eu.brassepc.fitnessdroid.data.local.PendingActivity(
+                            activityTypeId = overrideTypeId ?: s.typeId,
+                            typeName = s.typeName,
+                            isCardio = true,
+                            startedAtIso = startedIso,
+                            durationSeconds = s.elapsedSeconds.coerceAtLeast(1),
+                            distanceMeters = distance,
+                            elevationGainMeters = elevation,
+                            rpe = rpe,
+                            source = "tracked",
+                            routePolyline = polyline,
+                        )
+                    )
+                    saved.value = true
+                    message.value = "Ingen kontakt med servern — sparad lokalt, synkas automatiskt."
+                    TrackLog.log("offline: köad lokalt för synk")
+                }.onFailure {
+                    message.value = "Kunde inte spara — försök igen."
+                    TrackLog.log("FEL vid sparning: ${it.message}")
+                }
+            }
+        }
+    }
+
+    companion object {
+        val Factory: ViewModelProvider.Factory = viewModelFactory {
+            initializer {
+                val c = appContainer()
+                TrackViewModel(c.gymApi, c.gymRepository, c.settingsStore)
+            }
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun TrackScreen(
+    typeId: Int,
+    onBack: () -> Unit,
+    viewModel: TrackViewModel = viewModel(factory = TrackViewModel.Factory),
+) {
+    val context = LocalContext.current
+    val tracking by viewModel.tracking.collectAsStateWithLifecycle()
+    val summary by viewModel.summary.collectAsStateWithLifecycle()
+    val saved by viewModel.saved.collectAsStateWithLifecycle()
+    val message by viewModel.message.collectAsStateWithLifecycle()
+    val logEnabled by viewModel.logEnabled.collectAsStateWithLifecycle(false)
+
+    val pendingType by viewModel.pendingType.collectAsStateWithLifecycle()
+    val typeLoadError by viewModel.typeLoadError.collectAsStateWithLifecycle()
+    var permissionDenied by remember { mutableStateOf(false) }
+    var started by remember { mutableStateOf(false) }
+
+    val permissionLauncher = rememberLauncherForActivityResult(
+        ActivityResultContracts.RequestMultiplePermissions()
+    ) { granted ->
+        // Notis-permission är trevlig men inte nödvändig; GPS krävs för distans
+        val fineOk = granted[Manifest.permission.ACCESS_FINE_LOCATION] ?: false
+        val needsGps = viewModel.pendingType.value?.isDistanceBased == true
+        if (!needsGps || fineOk) {
+            viewModel.start(context)
+            started = true
+        } else {
+            permissionDenied = true
+        }
+    }
+
+    /** Begär saknade behörigheter (eller starta direkt) — körs även från "Försök igen". */
+    fun tryStart() {
+        val type = pendingType ?: return
+        permissionDenied = false
+        val needed = buildList {
+            if (type.isDistanceBased) {
+                add(Manifest.permission.ACCESS_FINE_LOCATION)
+                add(Manifest.permission.ACCESS_COARSE_LOCATION)
+                // Stegsensorn (valfri — nekas den blir stegen bara tomma)
+                add(Manifest.permission.ACTIVITY_RECOGNITION)
+            }
+            // POST_NOTIFICATIONS finns först i Android 13 (API 33)
+            if (android.os.Build.VERSION.SDK_INT >= 33) {
+                add(Manifest.permission.POST_NOTIFICATIONS)
+            }
+        }.filter {
+            ContextCompat.checkSelfPermission(context, it) != PackageManager.PERMISSION_GRANTED
+        }
+        if (needed.isEmpty()) {
+            viewModel.start(context)
+            started = true
+        } else {
+            permissionLauncher.launch(needed.toTypedArray())
+        }
+    }
+
+    // Ladda typen (om inte en spårning redan pågår) …
+    LaunchedEffect(typeId) {
+        if (tracking.isActive) { started = true; return@LaunchedEffect }
+        viewModel.loadType(typeId)
+    }
+    // … och starta när den kommit
+    LaunchedEffect(pendingType) {
+        if (pendingType != null && !started && !tracking.isActive) tryStart()
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = {
+                    Row(verticalAlignment = Alignment.CenterVertically) {
+                        Icon(
+                            Icons.Default.Favorite,
+                            contentDescription = null,
+                            tint = MaterialTheme.colorScheme.primary,
+                        )
+                        Text(
+                            tracking.typeName.ifBlank { pendingType?.nameSv ?: "Aktivitet" },
+                            modifier = Modifier.padding(start = 8.dp),
+                        )
+                    }
+                },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = "Tillbaka")
+                    }
+                },
+            )
+        },
+    ) { padding ->
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(padding),
+        ) {
+            when {
+                summary != null -> SummaryContent(
+                    summary = summary!!,
+                    saved = saved,
+                    message = message,
+                    onSave = { rpe, overrideId -> viewModel.save(rpe, overrideId) },
+                    onDone = onBack,
+                    showLog = logEnabled,
+                )
+                permissionDenied -> Column(
+                    modifier = Modifier.padding(16.dp),
+                    verticalArrangement = Arrangement.spacedBy(12.dp),
+                ) {
+                    Text(
+                        "Platsbehörighet saknas — GPS-spårning kräver den.",
+                        color = MaterialTheme.colorScheme.error,
+                        style = MaterialTheme.typography.titleSmall,
+                    )
+                    Text(
+                        "Öppna appens inställningar och ge \"Plats\"-behörigheten " +
+                            "(Tillåt endast när appen används räcker), kom sen tillbaka " +
+                            "och tryck Försök igen.",
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                    Button(
+                        onClick = { context.openAppSettings() },
+                        modifier = Modifier.fillMaxWidth(),
+                    ) { Text("Öppna appinställningarna") }
+                    androidx.compose.material3.FilledTonalButton(
+                        onClick = { tryStart() },
+                        modifier = Modifier.fillMaxWidth(),
+                    ) { Text("Försök igen") }
+                }
+                typeLoadError -> Column(
+                    modifier = Modifier.padding(16.dp),
+                    verticalArrangement = Arrangement.spacedBy(12.dp),
+                ) {
+                    Text(
+                        "Kunde inte hämta aktivitetstypen — offline?",
+                        color = MaterialTheme.colorScheme.error,
+                    )
+                    Button(
+                        onClick = { viewModel.loadType(typeId) },
+                        modifier = Modifier.fillMaxWidth(),
+                    ) { Text("Försök igen") }
+                }
+                !tracking.isActive && !started -> Box(
+                    modifier = Modifier.fillMaxSize(),
+                    contentAlignment = Alignment.Center,
+                ) { CircularProgressIndicator() }
+                else -> LiveContent(
+                    tracking = tracking,
+                    onStop = { viewModel.stop(context) },
+                    onPlay = { TrackingService.play(context) },
+                    onPause = { TrackingService.pause(context) },
+                    showLog = logEnabled,
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun LiveContent(
+    tracking: TrackingState,
+    onStop: () -> Unit,
+    onPlay: () -> Unit,
+    onPause: () -> Unit,
+    showLog: Boolean,
+) {
+    Column(modifier = Modifier.fillMaxSize()) {
+        if (tracking.isDistanceBased) {
+            TrackMap(
+                points = tracking.points,
+                currentPosition = tracking.currentPosition,
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .weight(1f),
+            )
+        } else {
+            Box(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .weight(1f),
+                contentAlignment = Alignment.Center,
+            ) {
+                Column(horizontalAlignment = Alignment.CenterHorizontally) {
+                    Text(
+                        formatElapsed(tracking.elapsedSeconds),
+                        style = MaterialTheme.typography.displayLarge,
+                    )
+                    Text(
+                        "Rörelsespårning avstängd — bara tiden loggas",
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+        }
+
+        Card(modifier = Modifier.fillMaxWidth().padding(12.dp)) {
+            Column(
+                modifier = Modifier.padding(14.dp),
+                verticalArrangement = Arrangement.spacedBy(10.dp),
+            ) {
+                when (tracking.phase) {
+                    TrackingPhase.READY -> Row(verticalAlignment = Alignment.CenterVertically) {
+                        Column(modifier = Modifier.weight(1f)) {
+                            Text("Redo att starta", style = MaterialTheme.typography.titleSmall)
+                            Text(
+                                if (tracking.isDistanceBased && !tracking.gpsFix)
+                                    "GPS söker — vänta gärna på fix, eller kör igång direkt."
+                                else "Tryck play när du är redo.",
+                                style = MaterialTheme.typography.bodySmall,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                            )
+                        }
+                    }
+                    TrackingPhase.COUNTDOWN -> Row(
+                        modifier = Modifier.fillMaxWidth(),
+                        horizontalArrangement = Arrangement.Center,
+                    ) {
+                        Text(
+                            "${tracking.countdownLeft}",
+                            style = MaterialTheme.typography.displayLarge,
+                            color = MaterialTheme.colorScheme.primary,
+                        )
+                    }
+                    TrackingPhase.PAUSED -> Text(
+                        "Pausad — tryck play för att fortsätta",
+                        style = MaterialTheme.typography.titleSmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                    else -> Unit
+                }
+                Row(modifier = Modifier.fillMaxWidth()) {
+                    StatBox("Tid", formatElapsed(tracking.elapsedSeconds), Modifier.weight(1f))
+                    if (tracking.isDistanceBased) {
+                        StatBox("Distans", "${(tracking.distanceMeters / 1000).compact()} km", Modifier.weight(1f))
+                        StatBox("Steg", tracking.steps?.toString() ?: "—", Modifier.weight(1f))
+                    }
+                    StatBox("Kcal", tracking.kcal?.toInt()?.toString() ?: "—", Modifier.weight(1f))
+                }
+                if (tracking.isDistanceBased) {
+                    Row(modifier = Modifier.fillMaxWidth()) {
+                        StatBox("Höjdmeter", "+${tracking.elevationGainMeters.toInt()} m", Modifier.weight(1f))
+                        StatBox(
+                            "Snittfart",
+                            if (tracking.elapsedSeconds > 30 && tracking.distanceMeters > 10) {
+                                val kmh = (tracking.distanceMeters / 1000) / (tracking.elapsedSeconds / 3600.0)
+                                "${kmh.compact()} km/h"
+                            } else "—",
+                            Modifier.weight(1f),
+                        )
+                        StatBox(
+                            "Fart",
+                            tracking.currentSpeedKmh?.let { "${it.compact()} km/h" } ?: "—",
+                            Modifier.weight(1f),
+                        )
+                        StatBox(
+                            "GPS",
+                            when {
+                                !tracking.gpsFix -> "söker…"
+                                !tracking.isMoving -> "stilla"
+                                else -> "OK"
+                            },
+                            Modifier.weight(1f),
+                        )
+                    }
+                }
+                Row(horizontalArrangement = Arrangement.spacedBy(10.dp)) {
+                    when (tracking.phase) {
+                        TrackingPhase.READY, TrackingPhase.PAUSED -> Button(
+                            onClick = onPlay,
+                            modifier = Modifier.weight(1f),
+                        ) {
+                            Icon(Icons.Default.PlayArrow, contentDescription = null)
+                            Text(
+                                if (tracking.phase == TrackingPhase.PAUSED) "Fortsätt" else "Starta",
+                                modifier = Modifier.padding(start = 6.dp),
+                            )
+                        }
+                        TrackingPhase.ACTIVE -> Button(
+                            onClick = onPause,
+                            modifier = Modifier.weight(1f),
+                            colors = androidx.compose.material3.ButtonDefaults.buttonColors(
+                                containerColor = MaterialTheme.colorScheme.secondary,
+                                contentColor = MaterialTheme.colorScheme.onSecondary,
+                            ),
+                        ) {
+                            Icon(Icons.Default.Pause, contentDescription = null)
+                            Text("Pausa", modifier = Modifier.padding(start = 6.dp))
+                        }
+                        else -> Unit
+                    }
+                    Button(
+                        onClick = onStop,
+                        modifier = Modifier.weight(1f),
+                        colors = androidx.compose.material3.ButtonDefaults.buttonColors(
+                            containerColor = MaterialTheme.colorScheme.error,
+                            contentColor = MaterialTheme.colorScheme.onError,
+                        ),
+                    ) {
+                        Icon(Icons.Default.Stop, contentDescription = null)
+                        Text("Avsluta", modifier = Modifier.padding(start = 6.dp))
+                    }
+                }
+                if (showLog) TechLogSection()
+            }
+        }
+    }
+}
+
+/** Expanderbar teknisk logg (GPS-fixar m.m.) med delningsknapp — för felsökning. */
+@Composable
+fun TechLogSection() {
+    val context = LocalContext.current
+    var expanded by remember { mutableStateOf(false) }
+    val lines by TrackLog.lines.collectAsStateWithLifecycle()
+
+    Column {
+        TextButton(onClick = { expanded = !expanded }) {
+            Text(if (expanded) "Dölj teknisk logg" else "Teknisk logg (${lines.size})")
+        }
+        if (expanded) {
+            Column(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .height(180.dp)
+                    .verticalScroll(rememberScrollState()),
+            ) {
+                lines.takeLast(100).forEach {
+                    Text(
+                        it,
+                        style = MaterialTheme.typography.bodySmall.copy(
+                            fontFamily = androidx.compose.ui.text.font.FontFamily.Monospace,
+                            fontSize = androidx.compose.ui.unit.TextUnit(10f, androidx.compose.ui.unit.TextUnitType.Sp),
+                        ),
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+            TextButton(onClick = {
+                val intent = android.content.Intent(android.content.Intent.ACTION_SEND).apply {
+                    type = "text/plain"
+                    putExtra(android.content.Intent.EXTRA_TEXT, TrackLog.asText())
+                }
+                context.startActivity(
+                    android.content.Intent.createChooser(intent, "Dela teknisk logg")
+                )
+            }) { Text("Dela loggen") }
+        }
+    }
+}
+
+@Composable
+private fun StatBox(label: String, value: String, modifier: Modifier = Modifier) {
+    Column(modifier = modifier, horizontalAlignment = Alignment.CenterHorizontally) {
+        Text(
+            label,
+            style = MaterialTheme.typography.labelSmall,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+        Text(value, style = MaterialTheme.typography.titleMedium)
+    }
+}
+
+@Composable
+private fun TrackMap(
+    points: List<Pair<Double, Double>>,
+    currentPosition: Pair<Double, Double>?,
+    modifier: Modifier = Modifier,
+) {
+    val context = LocalContext.current
+    val lineColor = MaterialTheme.colorScheme.primary.toArgb()
+
+    val mapView = remember {
+        Configuration.getInstance().apply {
+            userAgentValue = "FitnessDroid"
+            osmdroidBasePath = File(context.cacheDir, "osmdroid")
+            osmdroidTileCache = File(context.cacheDir, "osmdroid/tiles")
+        }
+        MapView(context).apply {
+            setTileSource(TileSourceFactory.MAPNIK)
+            setMultiTouchControls(true)
+            controller.setZoom(17.0)
+        }
+    }
+    val polyline = remember {
+        Polyline().apply {
+            outlinePaint.color = lineColor
+            outlinePaint.strokeWidth = 10f
+        }.also { mapView.overlays.add(it) }
+    }
+    val positionMarker = remember {
+        org.osmdroid.views.overlay.Marker(mapView).apply {
+            setAnchor(org.osmdroid.views.overlay.Marker.ANCHOR_CENTER, org.osmdroid.views.overlay.Marker.ANCHOR_CENTER)
+            setInfoWindow(null)
+        }.also { mapView.overlays.add(it) }
+    }
+    // Centrera bara automatiskt tills användaren själv panorerat
+    var hasCentered by remember { mutableStateOf(false) }
+
+    DisposableEffect(Unit) {
+        mapView.onResume()
+        onDispose {
+            mapView.onPause()
+            mapView.onDetach()
+        }
+    }
+
+    AndroidView(
+        factory = { mapView },
+        modifier = modifier,
+        update = { map ->
+            val pos = points.lastOrNull() ?: currentPosition
+            if (pos != null) {
+                positionMarker.position = GeoPoint(pos.first, pos.second)
+                positionMarker.isEnabled = true
+                if (!hasCentered) {
+                    map.controller.setZoom(17.0)
+                    map.controller.setCenter(GeoPoint(pos.first, pos.second))
+                    hasCentered = true
+                } else {
+                    map.controller.animateTo(GeoPoint(pos.first, pos.second))
+                }
+            } else {
+                positionMarker.isEnabled = false
+            }
+            if (points.isNotEmpty()) {
+                polyline.setPoints(points.map { (lat, lon) -> GeoPoint(lat, lon) })
+            }
+            map.invalidate()
+        },
+    )
+}
+
+@Composable
+private fun SummaryContent(
+    summary: TrackingState,
+    saved: Boolean,
+    message: String?,
+    onSave: (Double?, Int?) -> Unit,
+    onDone: () -> Unit,
+    showLog: Boolean,
+) {
+    var rpe by remember { mutableStateOf(5f) }
+
+    // Aktivitetsgissning: föreslå bättre matchande typ utifrån tempo + höjd
+    val guessKey = remember(summary) {
+        if (summary.isDistanceBased && summary.distanceMeters > 200 && summary.elapsedSeconds > 60) {
+            val kmh = (summary.distanceMeters / 1000) / (summary.elapsedSeconds / 3600.0)
+            val elevPerKm = summary.elevationGainMeters / (summary.distanceMeters / 1000)
+            ActivityKcal.guessTypeKey(kmh, elevPerKm).takeIf { it != summary.typeKey }
+        } else null
+    }
+
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .verticalScroll(rememberScrollState())
+            .padding(16.dp),
+        verticalArrangement = Arrangement.spacedBy(14.dp),
+    ) {
+        Text("Sammanfattning", style = MaterialTheme.typography.headlineSmall)
+
+        Card(modifier = Modifier.fillMaxWidth()) {
+            Column(
+                modifier = Modifier.padding(16.dp),
+                verticalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                SummaryRow("Aktivitet", summary.typeName)
+                SummaryRow("Tid", formatElapsed(summary.elapsedSeconds))
+                if (summary.isDistanceBased) {
+                    SummaryRow("Distans", "${(summary.distanceMeters / 1000).compact()} km")
+                    SummaryRow("Höjdmeter", "+${summary.elevationGainMeters.toInt()} m")
+                    if (summary.elapsedSeconds > 0 && summary.distanceMeters > 10) {
+                        val kmh = (summary.distanceMeters / 1000) / (summary.elapsedSeconds / 3600.0)
+                        SummaryRow("Snittfart", "${kmh.compact()} km/h")
+                    }
+                }
+                summary.steps?.takeIf { it > 0 }?.let { SummaryRow("Steg", "$it") }
+                summary.kcal?.let { SummaryRow("Kcal (preliminärt)", "${it.toInt()}") }
+
+                guessKey?.let {
+                    Text(
+                        "Tempot ser ut som \"$it\" — aktiviteten sparas som " +
+                            "${summary.typeName}, rätta i efterhand om det blev fel.",
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+        }
+
+        if (!summary.isDistanceBased) {
+            Card(modifier = Modifier.fillMaxWidth()) {
+                Column(
+                    modifier = Modifier.padding(16.dp),
+                    verticalArrangement = Arrangement.spacedBy(6.dp),
+                ) {
+                    Text("Hur ansträngande var det?", style = MaterialTheme.typography.titleSmall)
+                    Text(
+                        RPE_LABELS[rpe.toInt().coerceIn(0, 10)],
+                        color = MaterialTheme.colorScheme.primary,
+                        style = MaterialTheme.typography.bodyMedium,
+                    )
+                    Slider(value = rpe, onValueChange = { rpe = it }, valueRange = 0f..10f, steps = 9)
+                    Text(
+                        "Används för kaloriberäkningen — från \"ingen ansträngning\" " +
+                            "till \"kan inte prata mer än ett par ord\".",
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+        }
+
+        message?.let { Text(it, color = MaterialTheme.colorScheme.error) }
+
+        if (showLog) TechLogSection()
+
+        if (saved) {
+            Text(
+                "Sparad ✓",
+                color = MaterialTheme.colorScheme.primary,
+                style = MaterialTheme.typography.titleMedium,
+            )
+            Button(onClick = onDone, modifier = Modifier.fillMaxWidth()) { Text("Klar") }
+        } else {
+            Button(
+                onClick = {
+                    onSave(if (!summary.isDistanceBased) rpe.toInt().toDouble() else null, null)
+                },
+                modifier = Modifier.fillMaxWidth(),
+                enabled = summary.elapsedSeconds > 0,
+            ) { Text("Spara aktiviteten") }
+            TextButton(onClick = onDone, modifier = Modifier.fillMaxWidth()) {
+                Text("Släng utan att spara", color = MaterialTheme.colorScheme.error)
+            }
+        }
+    }
+}
+
+@Composable
+private fun SummaryRow(label: String, value: String) {
+    Row(modifier = Modifier.fillMaxWidth()) {
+        Text(
+            label,
+            modifier = Modifier.weight(1f),
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+        Text(value)
+    }
+}
+
+private fun formatElapsed(sec: Int): String {
+    val h = sec / 3600
+    val m = (sec % 3600) / 60
+    val s = sec % 60
+    return if (h > 0) "%d:%02d:%02d".format(h, m, s) else "%02d:%02d".format(m, s)
+}

app/src/main/res/values/strings.xml

@@ -1,4 +1,30 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <string name="app_name">FitnessDroid</string>
+
+    <!-- Strängar som de vendrade openScale-drivrutinerna refererar (svenska motsvarigheter
+         till upstreams engelska; formatargumenten måste matcha upstream). -->
+    <string name="bt_error_delivery_user_feedback">Kunde inte leverera användarsvar: %1$s</string>
+    <string name="bt_error_generic">Fel</string>
+    <string name="bt_error_handler_connect_failed">Drivrutinen misslyckades vid anslutning: %1$s</string>
+    <string name="bt_error_handler_parse_error">Drivrutinen kunde inte tolka %1$s: %2$s</string>
+    <string name="bt_error_no_bluetooth_adapter">Ingen Bluetooth-adapter hittades på enheten.</string>
+    <string name="bt_error_no_device_found">Vågen hittades inte. Kontrollera att den är på och inom räckhåll.</string>
+    <string name="bt_error_no_user_selected">Ingen användare vald</string>
+    <string name="bt_info_reconnecting_try">Återansluter… (försök %1$d/%2$d)</string>
+    <string name="bt_info_step_on_scale">Ställ dig barfota på vågen</string>
+    <string name="bt_info_waiting_for_measurement">Väntar på mätning…</string>
+    <string name="bt_warn_notify_failed">Kunde inte aktivera notifieringar för %1$s.</string>
+    <string name="bt_warn_write_failed_status">Skrivning till %1$s misslyckades: %2$s</string>
+    <string name="cap_battery">Batteri</string>
+    <string name="cap_body_composition">Kroppssammansättning</string>
+    <string name="cap_history_read">Historikläsning</string>
+    <string name="cap_live_weight">Livevikt</string>
+    <string name="cap_time_sync">Tidssynk</string>
+    <string name="cap_unit_config">Enhetsval</string>
+    <string name="cap_user_sync">Användarsynk</string>
+    <string name="no_special_configuration_available">Ingen extra konfiguration finns för den här vågen.</string>
+    <string name="tuning_aggressive">Aggressiv</string>
+    <string name="tuning_balanced">Balanserad</string>
+    <string name="tuning_conservative">Försiktig</string>
 </resources>

app/src/main/res/xml/file_paths.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths>
+    <cache-path name="updates" path="updates/" />
+</paths>

build.gradle.kts

@@ -3,4 +3,5 @@ plugins {
     alias(libs.plugins.kotlin.android) apply false
     alias(libs.plugins.kotlin.compose) apply false
     alias(libs.plugins.kotlin.serialization) apply false
+    alias(libs.plugins.ksp) apply false
 }

doc/activities-plan.md

@@ -0,0 +1,109 @@
+# Aktiviteter, kcal-mätare & mål — plan
+
+*Godkänd 2026-08-23. Samma plan finns i brasse-pc.eu-v2:
+`docs/gym-activities-plan.md` — uppdatera båda vid ändringar.*
+
+Cardio/fristående aktiviteter (promenad, jogg, vandring, fäktning/HEMA m.m.)
+som eget koncept vid sidan av gympass, en daglig kcal-mätare på hemskärmen,
+mål (dag/vecka/månad) och GPS-livespårning. Kondition markeras med ❤️.
+
+## Grundkoncept
+
+- **Pass** (finns): gympass med övningar/set.
+- **Aktivitet** (nytt): något man gör över tid. Har tid, ev. distans/höjd/
+  rutt, kcal, ansträngning (RPE) och källa (manuellt/spårat/telefon/import).
+
+### Aktivitetsbibliotek
+
+~60 kurerade aktiviteter från **Compendium of Physical Activities**
+(publika MET-standarden), seedade i gym-API:t:
+`key, namnSv, namnEn, met, kategori, isDistanceBased, iconKey, googleFitType`.
+Google Fit-typmappningen gör framtida import rak. Stadspromenad, jogg,
+skogsvandring och HEMA/fäktning får tempo-/RPE-justerade MET-kurvor.
+
+### Kcal-modellen
+
+Kräver längd/födelseår/kön i API:t (gamla "milstolpe 5" ur
+`openscale-integration.md` bakas in i etapp 1).
+
+- **Passivt:** BMR (Mifflin–St Jeor: `10·vikt + 6.25·längd − 5·ålder + k`,
+  k = +5 man / −161 kvinna), fylls på linjärt över dygnet.
+- **Aktivt loggat:** gympass (befintlig MET-modell) + aktiviteter
+  (MET × vikt × timmar; distansaktiviteter justeras efter verkligt tempo och
+  höjdmeter, icke-distans efter RPE-slidern). Netto-kcal (MET−1) används så
+  BMR inte dubbelräknas.
+- **Telefon-auto:** steg + externa pass via **Health Connect**, med
+  dubbelräkningsskydd (steg under egen loggad aktivitet räknas inte).
+- **RPE-slider:** "ingen ansträngning" → "kan inte prata mer än ett par ord"
+  (talk test) → intensitetsfaktor på aktivitetens MET.
+- **Aktivitetsgissning:** tempo + höjdprofil ⇒ promenad (<~6,5 km/h)/jogg/
+  vandring (lågt tempo + höjdmeter); stillastående + timer ⇒ fäktning/HEMA.
+
+### Mätaren på hemskärmen
+
+Dagens kcal överst på Hem, tredelad: **aktivt loggat / telefon / passivt**.
+Mål visas som progress-bars/mätare under.
+
+## Datamodell (gym-API, EF-migrationer körs vid deploy)
+
+- `User` + `HeightCm` (double?), `BirthYear` (int?), `Sex` (string? "male"/"female")
+- `ActivityType` — seedad tabell (se ovan), utökningsbar
+- `Activity` — Guid id, userId, activityTypeId, startedAt, durationSeconds,
+  distanceMeters?, elevationGainMeters?, estimatedKcal, rpe? (0–10),
+  source (`manual`/`tracked`/`phone`/`imported`), routePolyline?
+  (Google encoded), externalId? (dedup vid import), notes?
+- `DailySteps` — userId, date, steps (upsert från appen)
+- `Goal` — metric (`KCAL`/`GYM_SESSIONS`/`STEPS`/`ACTIVITIES`/`DISTANCE_KM`)
+  × period (`DAY`/`WEEK`/`MONTH`), targetValue; max ett mål per metrik+period
+- GraphQL: `activityTypes`, `activities(from,to)`, `addActivity`/`update`/
+  `delete`, `upsertDailySteps`, `goals` + `setGoal`/`deleteGoal`,
+  `myProfile`/`updateProfile` (+längd/år/kön), `dailySummary(date)`
+  (kcal-tredelningen serverberäknad så app+webb delar logik)
+
+## Tagna designbeslut (2026-08-23)
+
+| Fråga | Beslut |
+|---|---|
+| Karta i appen | **osmdroid + OpenStreetMap** (inga nycklar, GPL-vänligt) |
+| Steg/telefondata | **Health Connect** (även vägen för Google Fit-import) |
+| Ruttlagring | **Encoded polyline + sammanfattning** på servern |
+| Aktivitetsbibliotek | **~60 kurerade** ur MET-kompendiet |
+
+## Etapper
+
+Leveransordning per etapp: **backend → CI grönt → webb → CI grönt → app →
+användartest**. Endast ETT Pi5-bygge åt gången — polla CI och vänta hellre
+för länge. (Path-filter: gym-api triggas av `backend-gym-traker/**`,
+frontend av `src/**` m.fl., FitnessDroid av varje push till main.)
+
+1. **Profil & kalorigrund** — API: HeightCm/BirthYear/Sex + `updateProfile`.
+   Webb: profilfält. App: kroppsdata synkas mot servern (lokal cache kvar),
+   BMR, kcal-mätare v1 på hemskärmen (passivt + gympass).
+2. **Aktiviteter: bibliotek + manuell logg** — API: ActivityType (seed) +
+   Activity CRUD + `dailySummary`. Webb: aktivitetsflik ❤️ (logga/lista/
+   rätta). App: aktivitetsflik med bibliotek, manuell loggning
+   (tid/distans/RPE), kcal in i mätaren.
+3. **Live-spårning (GPS)** — App: starta aktivitet, foreground-service,
+   osmdroid-livekarta, live kcal/distans/tempo/höjdmeter; icke-distansläge
+   (timer + RPE efteråt); aktivitetsgissning; polyline till servern.
+   Webb: Leaflet-karta i aktivitetsdetalj.
+4. **Mål & mätare** — API: Goal CRUD. App: målkort med progress på Hem
+   (dag/vecka/månad × kcal/pass/steg/aktiviteter/km). Webb: målinställningar
+   + progress.
+5. **Steg & telefondata** — API: DailySteps. App: Health Connect-permissions,
+   daglig stegsynk, auto-aktiviteter från HC ("telefon"-källa), mätarens
+   tredelning komplett. Webb: stegvisning.
+6. **Statistik & polish** — ❤️-sektion i statistiken (app+webb):
+   distans/tempo-trender per typ, vecko-km; dokumentation; Google
+   Fit-importens grund (source/externalId/typmappning/HC) verifierad klar.
+
+## Status
+
+- [x] Etapp 1 — Profil & kalorigrund *(kod klar 2026-08-23: backend a1cd4d3, webb 560894c, app — väntar på användartest + omdeploy av gym-api/frontend-containrarna)*
+- [x] Etapp 2 — Aktiviteter: bibliotek + manuell logg *(kod klar 2026-08-23: backend 9a81cf6, webb — aktivitetsflik, app 0.6.0; väntar på användartest)*
+- [x] Etapp 3 — Live-spårning (GPS) *(klar & fälttestad 2026-08-26: GPS-väntfas, providerlyssning gps/fused/network, fartgrind (Doppler), rörelsevakt (accelerometer), offline-kö, teknisk logg — GPS-filter justerbara i inställningarna)*
+- [x] Etapp 4 — Mål & mätare *(kod klar 2026-08-26: Goal-modell + goalsWithProgress i API:t, målsektion i webbens aktivitetsflik, målkort med progress-bars på appens hemskärm + målskärm; väntar på användartest)*
+- [x] Etapp 5 — Steg & telefondata *(kod klar 2026-08-26: DailySteps + upsert i API:t med telefon-kcal (0.00038 kcal/steg/kg, dubbelräkningsskydd mot gång/löp/vandringsaktiviteter), Health Connect-läsning i appen (connect-client 1.1.0-alpha07 — nyare kräver AGP 8.9/SDK 36), aktivering under Inställningar → Stegsynk; webben behövde ingen ändring. Väntar på användartest)*
+- [x] Etapp 6 — Statistik & polish *(kod klar 2026-08-26: konditionssektion ❤️ i både appens och webbens statistik (KPI, km/vecka, per typ), README uppdaterad. Google Fit-importens grund verifierad: source=imported, externalId-dedup, googleFitType-mappning i biblioteket och Health Connect-läsning på plats)*
+
+Google Fit-importen byggs som separat arbete — all grund finns: source=imported, externalId-dedup i addActivity, googleFitType-mappning per aktivitetstyp och Health Connect-integrationen i appen.

doc/design-forslag-m2.html

@@ -0,0 +1,645 @@
+<title>FitnessDroid — designförslag</title>
+<meta name="description" content="Passpilot-konceptet: mockups för passläge, hemskärm, övningsväljare, Android-ytor, kroppskarta och API-förslag.">
+<style>
+  :root{
+    --ground:#0c0f0b; --panel:#131812; --panel-hi:#1a201a; --line:#263026;
+    --ink:#e4e7de; --dim:#96a093; --accent:#8fd694; --accent-deep:#2e4a33;
+    --m3-bg:#101410; --m3-surf:#1a211a; --m3-surf2:#232b23; --m3-surf3:#2b342b;
+    --m3-pri:#8fd694; --m3-onpri:#08300f; --m3-on:#e2e5dc; --m3-dim:#a9b2a5;
+    --m3-outline:#3e483d; --m3-seccont:#33503a; --m3-onsec:#cfeacf;
+    --heat0:#233026; --heat1:#3d5c42; --heat2:#5f8f60; --heat3:#8fd694; --heat4:#d3f0c9;
+  }
+  *{box-sizing:border-box;margin:0}
+  body{background:var(--ground);color:var(--ink);
+    font:16px/1.55 Roboto,system-ui,-apple-system,"Segoe UI",sans-serif;
+    -webkit-font-smoothing:antialiased;padding:0 20px 96px}
+  .wrap{max-width:1180px;margin:0 auto}
+  a{color:var(--accent)}
+
+  header.top{padding:64px 0 24px;border-bottom:1px solid var(--line);margin-bottom:8px}
+  .eyebrow{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);font-weight:600}
+  h1{font-size:clamp(28px,4.5vw,44px);font-weight:800;letter-spacing:-.02em;text-wrap:balance;margin:10px 0 12px}
+  .lede{color:var(--dim);max-width:66ch}
+  section{padding:52px 0 8px}
+  .secnum{font:600 12px/1 ui-monospace,monospace;color:var(--dim);letter-spacing:.1em}
+  h2{font-size:26px;font-weight:750;letter-spacing:-.01em;margin:8px 0 6px;text-wrap:balance}
+  .secintro{color:var(--dim);max-width:64ch;margin-bottom:28px}
+  h3{font-size:17px;font-weight:700;margin:0 0 4px}
+
+  /* koncept-kort */
+  .modes{display:flex;gap:14px;flex-wrap:wrap;margin-top:22px}
+  .mode{flex:1 1 240px;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:18px}
+  .mode b{display:block;font-size:15px;margin-bottom:5px}
+  .mode span{color:var(--dim);font-size:14px}
+  .mode .k{font:700 11px/1 ui-monospace,monospace;color:var(--accent);letter-spacing:.12em;display:block;margin-bottom:10px}
+
+  /* telefonram */
+  .phone{width:320px;background:#000;border:1px solid #2c342c;border-radius:30px;
+    padding:9px;flex:0 0 auto;box-shadow:0 24px 60px -30px rgba(0,0,0,.8)}
+  .screen{background:var(--m3-bg);border-radius:22px;overflow:hidden;display:flex;
+    flex-direction:column;height:640px;font-size:13.5px;color:var(--m3-on)}
+  .statusbar{display:flex;justify-content:space-between;align-items:center;
+    padding:10px 18px 4px;font-size:11px;color:var(--m3-dim)}
+  .sb-ic{display:flex;gap:5px;align-items:center}
+  .content{flex:1;overflow:hidden;padding:6px 14px 0;display:flex;flex-direction:column;gap:11px}
+  .gesture{height:18px;display:flex;align-items:center;justify-content:center}
+  .gesture i{display:block;width:96px;height:4px;border-radius:2px;background:#3a423a}
+
+  /* m3-bitar */
+  .m3-greet{padding:6px 4px 0}
+  .m3-greet b{font-size:21px;font-weight:700;display:block}
+  .m3-greet span{color:var(--m3-dim);font-size:12.5px}
+  .card{background:var(--m3-surf);border-radius:16px;padding:13px 14px}
+  .card.tonal{background:var(--m3-surf2)}
+  .rowline{display:flex;align-items:center;gap:10px}
+  .rowline .grow{flex:1;min-width:0}
+  .btn-filled{background:var(--m3-pri);color:var(--m3-onpri);border-radius:999px;
+    padding:13px 18px;font-weight:700;font-size:14.5px;text-align:center;
+    display:flex;align-items:center;justify-content:center;gap:8px}
+  .seclabel{display:flex;justify-content:space-between;align-items:baseline;padding:2px 4px 0}
+  .seclabel b{font-size:13.5px;font-weight:700}
+  .seclabel a{font-size:11.5px;color:var(--m3-pri);text-decoration:none;font-weight:600}
+  .hscroll{display:flex;gap:10px;overflow:hidden}
+  .favcard{background:var(--m3-surf2);border-radius:16px;padding:12px;min-width:150px;flex:0 0 auto}
+  .favcard .nm{font-weight:700;font-size:13.5px;display:flex;gap:6px;align-items:center}
+  .favcard .muscles{color:var(--m3-dim);font-size:10.5px;margin:3px 0 8px}
+  .favcard .go{margin-top:6px;background:var(--m3-pri);color:var(--m3-onpri);border-radius:999px;
+    font-size:11.5px;font-weight:700;padding:6px 0;text-align:center}
+  .star{color:#ffd977;font-size:12px}
+  .listrow{display:flex;gap:11px;align-items:center;padding:9px 4px;border-bottom:1px solid #202820}
+  .listrow:last-child{border-bottom:0}
+  .listrow .t{font-weight:600;font-size:13px}
+  .listrow .s{color:var(--m3-dim);font-size:11px}
+  .mchip{width:34px;height:34px;border-radius:50%;background:var(--m3-surf3);
+    display:flex;align-items:center;justify-content:center;flex:0 0 auto}
+  .mchip svg{width:19px;height:19px;stroke:var(--m3-pri);fill:none;stroke-width:1.7;
+    stroke-linecap:round;stroke-linejoin:round}
+  .badge{font-size:9.5px;font-weight:700;background:var(--m3-surf3);color:var(--m3-dim);
+    border-radius:5px;padding:2px 5px;letter-spacing:.03em}
+  .searchbar{background:var(--m3-surf2);border-radius:999px;padding:10px 15px;color:var(--m3-dim);
+    display:flex;gap:9px;align-items:center;font-size:13px}
+  .chiprow{display:flex;gap:7px;overflow:hidden;padding:1px}
+  .chip{border:1px solid var(--m3-outline);border-radius:9px;padding:6px 11px;font-size:11.5px;
+    font-weight:600;color:var(--m3-dim);display:inline-flex;gap:6px;align-items:center;flex:0 0 auto}
+  .chip svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.8;
+    stroke-linecap:round;stroke-linejoin:round}
+  .chip.sel{background:var(--m3-seccont);color:var(--m3-onsec);border-color:transparent}
+  .chip.small{padding:4px 10px;font-size:10.5px;border-radius:999px}
+  .topbar-menu{display:flex;justify-content:space-between;align-items:center;padding:2px 4px}
+  .topbar-menu b{font-size:16px}
+
+  /* passläget */
+  .sess-top{display:flex;justify-content:space-between;align-items:center;padding:2px 4px}
+  .sess-top b{font-size:15.5px}
+  .timerchip{background:var(--m3-seccont);color:var(--m3-onsec);border-radius:999px;
+    padding:4px 11px;font:700 12px/1.4 ui-monospace,monospace}
+  .pagerdots{display:flex;gap:5px;align-items:center;padding:0 4px}
+  .pagerdots i{height:4px;border-radius:2px;background:var(--m3-surf3);flex:1}
+  .pagerdots i.done{background:var(--m3-pri);opacity:.45}
+  .pagerdots i.cur{background:var(--m3-pri)}
+  .exhead{padding:2px 4px}
+  .exhead b{font-size:19px;font-weight:750;display:block}
+  .exhead span{color:var(--m3-dim);font-size:11.5px}
+  .setdone{display:flex;align-items:center;gap:10px;padding:7px 10px;border-radius:11px;
+    background:var(--m3-surf);color:var(--m3-dim);font-size:12.5px}
+  .setdone .ck{color:var(--m3-pri);font-weight:800}
+  .setactive{background:var(--m3-surf2);border-radius:16px;padding:13px;display:flex;
+    flex-direction:column;gap:11px}
+  .steppers{display:flex;gap:9px}
+  .stepper{flex:1;background:var(--m3-bg);border-radius:13px;padding:8px 9px;
+    display:flex;align-items:center;justify-content:space-between}
+  .stepper .pm{width:30px;height:30px;border-radius:50%;background:var(--m3-surf3);
+    color:var(--m3-on);font:700 16px/30px sans-serif;text-align:center}
+  .stepper .val{text-align:center}
+  .stepper .val b{font-size:17px;font-variant-numeric:tabular-nums}
+  .stepper .val span{display:block;font-size:9.5px;color:var(--m3-dim);letter-spacing:.08em;text-transform:uppercase}
+  .rpe{display:flex;gap:6px;align-items:center;font-size:10.5px;color:var(--m3-dim)}
+  .rpe i{font-style:normal;border:1px solid var(--m3-outline);border-radius:7px;
+    padding:3px 9px;font-weight:700;font-size:11px}
+  .rpe i.sel{background:var(--m3-seccont);color:var(--m3-onsec);border-color:transparent}
+  .nextup{display:flex;align-items:center;gap:9px;color:var(--m3-dim);font-size:11.5px;padding:0 4px}
+
+  /* vilo-overlay */
+  .rest{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px}
+  .ring{width:190px;height:190px;border-radius:50%;position:relative;
+    background:conic-gradient(var(--m3-pri) 74%,var(--m3-surf3) 0)}
+  .ring::after{content:"";position:absolute;inset:12px;border-radius:50%;background:var(--m3-bg)}
+  .ring .mid{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;
+    justify-content:center;z-index:1}
+  .ring .mid b{font:800 40px/1 ui-monospace,monospace;font-variant-numeric:tabular-nums}
+  .ring .mid span{color:var(--m3-dim);font-size:11px;letter-spacing:.1em;text-transform:uppercase}
+  .restbtns{display:flex;gap:10px}
+  .restbtns .btn-tonal{background:var(--m3-surf3);color:var(--m3-on);border-radius:999px;
+    padding:9px 16px;font-weight:700;font-size:12.5px}
+  .restnext{color:var(--m3-dim);font-size:12px;text-align:center}
+  .restnext b{color:var(--m3-on)}
+
+  /* strips: minispelare + notis */
+  .strips{display:flex;flex-direction:column;gap:18px;min-width:280px;flex:1 1 340px}
+  .striplabel{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--dim);font-weight:700;margin-bottom:7px}
+  .stripbar{background:var(--m3-surf2);border:1px solid var(--line);border-radius:14px;
+    padding:10px 13px;display:flex;align-items:center;gap:11px;max-width:340px}
+  .stripbar .grow{flex:1;min-width:0}
+  .stripbar .t{font-weight:700;font-size:12.5px;color:var(--m3-on)}
+  .stripbar .s{font-size:10.5px;color:var(--m3-dim)}
+  .stripbar .act{color:var(--m3-pri);font-weight:800;font-size:11px}
+  .noti{background:#181d18;border:1px solid var(--line);border-radius:18px;padding:13px 15px;max-width:340px}
+  .noti .approw{display:flex;gap:7px;align-items:center;font-size:10px;color:var(--m3-dim);margin-bottom:7px}
+  .noti .approw i{width:13px;height:13px;border-radius:4px;background:var(--m3-pri);display:inline-block}
+  .noti b{font-size:13px;color:var(--m3-on)}
+  .noti p{font-size:12px;color:var(--m3-dim);margin:2px 0 9px}
+  .noti .actions{display:flex;gap:16px;font-weight:700;font-size:12px;color:var(--m3-pri)}
+
+  /* skivkalkylator */
+  .sheet{background:var(--m3-surf);border-radius:20px 20px 14px 14px;padding:16px;max-width:340px;border:1px solid var(--line)}
+  .sheet .grab{width:36px;height:4px;border-radius:2px;background:var(--m3-outline);margin:0 auto 12px}
+  .sheet h4{font-size:14px;margin-bottom:2px}
+  .sheet .sub{color:var(--m3-dim);font-size:11.5px;margin-bottom:13px}
+  .bar{display:flex;align-items:center;height:64px;margin:4px 0 12px}
+  .bar .shaft{height:7px;background:#5a635a;flex:1;border-radius:3px}
+  .bar .collar{width:9px;height:22px;background:#788078;border-radius:2px}
+  .plate{border-radius:4px;margin:0 1.5px;box-shadow:inset 0 0 0 1.5px rgba(0,0,0,.35)}
+  .p20{width:13px;height:62px;background:#3f6fb5}
+  .p10{width:11px;height:46px;background:#4d9b57}
+  .p5{width:10px;height:34px;background:#d7d7cf}
+  .p25{width:9px;height:26px;background:#c05252}
+  .sheet .plates-txt{font-size:12.5px;color:var(--m3-dim)}
+  .sheet .plates-txt b{color:var(--m3-on)}
+
+  /* widget */
+  .widget{background:linear-gradient(145deg,#1c231c,#141a14);border:1px solid var(--line);
+    border-radius:22px;padding:14px 16px;max-width:340px}
+  .widget .wt{display:flex;justify-content:space-between;align-items:center;margin-bottom:11px}
+  .widget .wt b{font-size:12.5px;color:var(--m3-on)}
+  .widget .wt span{font-size:10px;color:var(--m3-dim)}
+  .widget .wbtns{display:flex;gap:8px}
+  .widget .wb{flex:1;border-radius:12px;padding:10px 8px;font-size:11.5px;font-weight:700;text-align:center}
+  .widget .wb.pri{background:var(--m3-pri);color:var(--m3-onpri)}
+  .widget .wb.ton{background:var(--m3-surf3);color:var(--m3-on)}
+
+  /* kroppskarta */
+  .bodymaps{display:flex;gap:34px;flex-wrap:wrap;align-items:flex-start}
+  .bodycard{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:22px 26px;display:flex;gap:26px}
+  .bodycard figure{text-align:center}
+  .bodycard figcaption{font-size:11px;color:var(--dim);margin-top:8px;letter-spacing:.08em;text-transform:uppercase;font-weight:700}
+  .heatlegend{display:flex;align-items:center;gap:8px;font-size:11.5px;color:var(--dim);margin-top:16px}
+  .heatlegend i{width:22px;height:10px;border-radius:3px;display:inline-block}
+
+  /* layout runt telefoner */
+  .phones{display:flex;gap:26px;flex-wrap:wrap;align-items:flex-start}
+  .duo{display:flex;gap:40px;flex-wrap:wrap;align-items:flex-start}
+  .notes{flex:1 1 340px;min-width:280px;display:flex;flex-direction:column;gap:16px}
+  .note{display:flex;gap:13px;align-items:flex-start}
+  .note .dot{width:24px;height:24px;border-radius:50%;background:var(--accent);
+    color:#0a2e10;font:700 12.5px/24px ui-monospace,monospace;text-align:center;flex:0 0 auto}
+  .note p{color:var(--dim);font-size:14.5px}
+  .note b{color:var(--ink)}
+  .phcaption{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--dim);
+    font-weight:700;text-align:center;margin-top:12px}
+
+  table{border-collapse:collapse;width:100%;font-size:13.5px;margin-top:22px}
+  th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:top}
+  th{color:var(--dim);font-size:11px;text-transform:uppercase;letter-spacing:.1em}
+  td:first-child{font-weight:600;white-space:nowrap;color:var(--ink)}
+  td{color:var(--dim)}
+  .tablewrap{overflow-x:auto}
+  .pill-sm{display:inline-block;font-size:10px;font-weight:800;border-radius:5px;padding:2px 7px;
+    letter-spacing:.06em}
+  .pill-sm.s{background:var(--accent-deep);color:var(--accent)}
+  .pill-sm.m{background:#4a3f22;color:#e8c96e}
+
+  .decide{background:var(--panel);border:1px solid var(--line);border-radius:16px;
+    padding:22px 24px;margin-top:44px}
+  .decide h2{font-size:19px;margin:0 0 10px}
+  .decide ol{margin:0;padding-left:20px;color:var(--dim);display:flex;flex-direction:column;gap:8px;font-size:14.5px}
+  .decide b{color:var(--ink)}
+</style>
+
+<div class="wrap">
+<header class="top">
+  <div class="eyebrow">FitnessDroid · Milstolpe 2 · Designförslag v2</div>
+  <h1>En passpilot i fickan — inte webben i mindre format</h1>
+  <p class="lede">Nytt tänk: appen byggs runt <b>själva gympasset</b>, inte runt flikar.
+  Mellan seten har du svettiga händer och 90 sekunder — allt i passläget är därför
+  stora tryckytor, förifyllda värden och en vilotimer som sköter sig själv, även på
+  låsskärmen. Runt det: en hemskärm som startar pass på ett tryck, och Android-ytor
+  som webben aldrig kan nå.</p>
+  <div class="modes">
+    <div class="mode"><span class="k">LÄGE 1 · STARTA</span><b>Hemskärmen</b>
+      <span>Favoritpass, fritt pass, widget och appgenvägar — max två tryck till första setet.</span></div>
+    <div class="mode"><span class="k">LÄGE 2 · KÖR</span><b>Passläget</b>
+      <span>En övning i taget, set loggas med ett tryck, vilotimern tar över — appen coachar, du lyfter.</span></div>
+    <div class="mode"><span class="k">LÄGE 3 · FÖLJ UPP</span><b>Statistik &amp; PB</b>
+      <span>Kroppskarta som visar var veckans volym hamnat, trender och PB-historik.</span></div>
+  </div>
+</header>
+
+<!-- ============ 1. PASSLÄGET ============ -->
+<section>
+  <div class="secnum">1 / 6</div>
+  <h2>Passläget — en övning i taget, ett tryck per set</h2>
+  <p class="secintro">Hela skärmen ägnas åt övningen du står vid. Svep i sidled mellan
+  övningarna i passet. Värdena är alltid förifyllda från förra passet plus
+  progressionsregeln — stämmer allt trycker du bara på gröna knappen.</p>
+
+  <div class="duo">
+    <div>
+      <div class="phone"><div class="screen">
+        <div class="statusbar"><span>19:24</span><span class="sb-ic">▲ ▮</span></div>
+        <div class="content">
+          <div class="sess-top">
+            <span style="display:flex;align-items:center;gap:9px">
+              <svg width="18" height="18" viewBox="0 0 24 24" style="stroke:var(--m3-on);fill:none;stroke-width:1.8;stroke-linecap:round"><path d="M15 5l-7 7 7 7"/></svg>
+              <b>Push A</b></span>
+            <span class="timerchip">24:31</span>
+          </div>
+          <div class="pagerdots"><i class="done"></i><i class="done"></i><i class="cur"></i><i></i><i></i><i></i><i></i><i></i></div>
+          <div class="exhead"><b>Bänkpress</b>
+            <span>Övning 3 av 8 · Bröst, triceps · Förra passet: 4×8 @ 77,5 kg</span></div>
+
+          <div class="setdone"><span class="ck">✓</span>Set 1 · 80,0 kg × 8 · RPE 7</div>
+          <div class="setdone"><span class="ck">✓</span>Set 2 · 80,0 kg × 8 · RPE 8</div>
+
+          <div class="setactive">
+            <div style="font-size:11px;color:var(--m3-dim);font-weight:700;letter-spacing:.08em">SET 3 AV 4</div>
+            <div class="steppers">
+              <div class="stepper"><span class="pm">−</span>
+                <span class="val"><b>80,0</b><span>kg · ±2,5</span></span><span class="pm">+</span></div>
+              <div class="stepper"><span class="pm">−</span>
+                <span class="val"><b>8</b><span>reps</span></span><span class="pm">+</span></div>
+            </div>
+            <div class="rpe">RPE <i>7</i><i class="sel">8</i><i>9</i><i>10</i></div>
+            <div class="btn-filled">✓ Logga set — vilan startar</div>
+          </div>
+
+          <div class="nextup">
+            <svg width="14" height="14" viewBox="0 0 24 24" style="stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round"><path d="M5 12h14m-6-6 6 6-6 6"/></svg>
+            Nästa: Lutande hantelpress · 3×10 @ 28 kg</div>
+        </div>
+        <div class="gesture"><i></i></div>
+      </div></div>
+      <div class="phcaption">Passläget · aktivt set</div>
+    </div>
+
+    <div>
+      <div class="phone"><div class="screen">
+        <div class="statusbar"><span>19:26</span><span class="sb-ic">▲ ▮</span></div>
+        <div class="content">
+          <div class="sess-top"><b style="font-size:14px">Vila</b><span class="timerchip">Push A · 26:04</span></div>
+          <div class="rest">
+            <div class="ring"><div class="mid"><b>1:07</b><span>av 1:30</span></div></div>
+            <div class="restbtns">
+              <span class="btn-tonal">−15 s</span>
+              <span class="btn-tonal">+15 s</span>
+              <span class="btn-tonal">Hoppa över</span>
+            </div>
+            <div class="restnext">Härnäst: <b>Set 4 av 4 · 80,0 kg × 8</b><br>
+            Sista setet på bänken — sen lutande hantelpress</div>
+          </div>
+        </div>
+        <div class="gesture"><i></i></div>
+      </div></div>
+      <div class="phcaption">Vilan tar över skärmen</div>
+    </div>
+
+    <div class="notes">
+      <div class="note"><div class="dot">1</div><p><b>Ett tryck per set.</b> Vikt och
+      reps förifylls från förra passet + progressionsregeln (API:t har redan
+      <i>lastExercisePerformance</i>). Stämmer det: tryck ✓. Annars ±-knappar —
+      aldrig tangentbord för standardfallet.</p></div>
+      <div class="note"><div class="dot">2</div><p><b>Vilan sköter sig själv.</b> Loggat
+      set → timern startar, skärmen växlar till ringen, telefonen vibrerar när det
+      är dags. Längden hämtas per övning (litet API-tillägg, se sist).</p></div>
+      <div class="note"><div class="dot">3</div><p><b>Svep = nästa övning.</b> Ingen
+      lista att scrolla i mitt i passet. Prickraden överst visar var i passet du är;
+      långtryck öppnar överblicken där du kan ändra ordning eller lägga till övningar.</p></div>
+      <div class="note"><div class="dot">4</div><p><b>PB firas direkt</b> — slår du
+      ett personbästa på ett set får du konfetti och en 🏆-notis i samma sekund,
+      inte när passet är slut.</p></div>
+    </div>
+  </div>
+
+  <div style="margin-top:38px" class="duo">
+    <div class="strips">
+      <div><div class="striplabel">Minispelare — passet följer med i hela appen (som Spotify)</div>
+      <div class="stripbar">
+        <svg width="18" height="18" viewBox="0 0 24 24" style="fill:var(--m3-pri)"><path d="M8 5v14l11-7z"/></svg>
+        <div class="grow"><div class="t">Push A · Bänkpress</div><div class="s">Vila 0:47 kvar · set 4 av 4</div></div>
+        <span class="act">ÖPPNA</span>
+      </div></div>
+      <div><div class="striplabel">Notis på låsskärmen — timern utan att ta upp telefonen ur fickan</div>
+      <div class="noti">
+        <div class="approw"><i></i> FitnessDroid · pågår</div>
+        <b>Vila 0:47 — sen set 4 av 4</b>
+        <p>Bänkpress 80,0 kg × 8 · Push A 26:04</p>
+        <div class="actions"><span>+15 s</span><span>LOGGA SET</span><span>PAUSA PASS</span></div>
+      </div></div>
+    </div>
+    <div class="notes" style="justify-content:center">
+      <div class="note"><div class="dot">5</div><p><b>Lämna passläget utan att tappa
+      passet.</b> Kollar du statistik mitt i passet ligger minispelaren kvar ovanför
+      navigeringen. Notisen med timer-åtgärder gör att telefonen kan ligga kvar i
+      fickan mellan seten — <b>det här är appens största övertag över webben.</b></p></div>
+    </div>
+  </div>
+</section>
+
+<!-- ============ 2. HEMSKÄRM ============ -->
+<section>
+  <div class="secnum">2 / 6</div>
+  <h2>Hemskärmen — startmotorn</h2>
+  <p class="secintro">Öppnar du appen med ett pass igång åker du rakt in i passläget.
+  Annars: starta på ett eller två tryck.</p>
+
+  <div class="duo">
+    <div>
+      <div class="phone"><div class="screen">
+        <div class="statusbar"><span>19:24</span><span class="sb-ic">▲ ▮</span></div>
+        <div class="content">
+          <div class="m3-greet"><b>Tjena Björn</b><span>Vecka 30 · 2 pass · 3 veckors streak 🔥</span></div>
+          <div class="btn-filled" style="padding:15px 18px"><svg width="18" height="18" viewBox="0 0 24 24" style="fill:currentColor"><path d="M8 5v14l11-7z"/></svg> Starta fritt pass</div>
+          <div class="seclabel"><b>Favoritpass</b><a>Alla mallar</a></div>
+          <div class="hscroll">
+            <div class="favcard">
+              <div class="nm"><span class="star">★</span>Push A</div>
+              <div class="muscles">Bröst · Axlar · Triceps</div>
+              <div class="go">▶ Starta</div>
+            </div>
+            <div class="favcard">
+              <div class="nm"><span class="star">★</span>Ben &amp; core</div>
+              <div class="muscles">Ben · Mage</div>
+              <div class="go">▶ Starta</div>
+            </div>
+            <div class="favcard">
+              <div class="nm"><span class="star">★</span>Rygg</div>
+              <div class="muscles">Rygg · Biceps</div>
+              <div class="go">▶ Starta</div>
+            </div>
+          </div>
+          <div class="card tonal rowline">
+            <div class="mchip"><svg viewBox="0 0 24 24"><path d="M4 19V9m6 10V5m6 14v-7"/></svg></div>
+            <div class="grow"><div style="font-weight:700;font-size:12.5px">Veckans muskler</div>
+            <div style="font-size:10.5px;color:var(--m3-dim)">Mest bröst &amp; triceps — benen släpar efter</div></div>
+            <svg width="30" height="44" viewBox="0 0 30 46" aria-hidden="true">
+              <circle cx="15" cy="5" r="4" fill="#3d5c42"/>
+              <rect x="7" y="11" width="16" height="15" rx="5" fill="#8fd694"/>
+              <rect x="2" y="12" width="4.5" height="12" rx="2" fill="#5f8f60"/>
+              <rect x="23.5" y="12" width="4.5" height="12" rx="2" fill="#5f8f60"/>
+              <rect x="8" y="27" width="6" height="16" rx="2.6" fill="#233026"/>
+              <rect x="16" y="27" width="6" height="16" rx="2.6" fill="#233026"/>
+            </svg>
+          </div>
+          <div class="seclabel"><b>Senaste pass</b><a>Historik</a></div>
+          <div>
+            <div class="listrow"><div class="mchip"><svg viewBox="0 0 24 24"><path d="M4 12h16M7 8v8m10-8v8M4 10v4m16-4v4"/></svg></div>
+              <div class="grow"><div class="t">Push A</div><div class="s">mån 21/7 · 52 min · 4 890 kg</div></div>
+              <span class="badge">2 PB</span></div>
+          </div>
+        </div>
+        <div class="gesture"><i></i></div>
+      </div></div>
+      <div class="phcaption">Hemskärmen · inget pass igång</div>
+    </div>
+
+    <div class="notes">
+      <div class="note"><div class="dot">1</div><p><b>Fritt pass = ett tryck.</b>
+      Passet skapas direkt och övningsväljaren öppnas. Namn kan sättas efteråt —
+      inga formulär mellan dig och första setet.</p></div>
+      <div class="note"><div class="dot">2</div><p><b>Favoritpass = två tryck.</b>
+      API:ts favoritpass + mallar, med auto-progressionen förifylld.</p></div>
+      <div class="note"><div class="dot">3</div><p><b>Veckans muskler</b> — en liten
+      kroppskarta som teaser för statistiken, och en knuff om vad som är underjobbat.
+      Trycker du på kortet öppnas hela kartan (sektion 5).</p></div>
+      <div class="note"><div class="dot">4</div><p><b>Pågår ett pass öppnas appen
+      direkt i passläget</b> — hemskärmen visas bara när inget är igång. Därför
+      behövs inget "fortsätt"-kort: appen minns åt dig.</p></div>
+    </div>
+  </div>
+</section>
+
+<!-- ============ 3. ÖVNINGSVÄLJAREN ============ -->
+<section>
+  <div class="secnum">3 / 6</div>
+  <h2>Övningsväljaren — sök, muskelfilter, favoriter först</h2>
+  <p class="secintro">Muskelgrupper som chips med ikoner; vald grupp fäller ut sina
+  muskler som en andra rad. Brickorna (KG/REPS/TID/M) kommer från övningens
+  tracks-flaggor och styr sedan set-loggningens fält.</p>
+
+  <div class="duo">
+    <div>
+      <div class="phone"><div class="screen">
+        <div class="statusbar"><span>19:24</span><span class="sb-ic">▲ ▮</span></div>
+        <div class="content">
+          <div class="topbar-menu"><span style="display:flex;align-items:center;gap:10px">
+            <svg width="20" height="20" viewBox="0 0 24 24" style="stroke:var(--m3-on);fill:none;stroke-width:1.8;stroke-linecap:round"><path d="M15 5l-7 7 7 7"/></svg>
+            <b>Lägg till övning</b></span></div>
+          <div class="searchbar"><svg width="15" height="15" viewBox="0 0 24 24" style="stroke:currentColor;fill:none;stroke-width:1.8"><circle cx="11" cy="11" r="6"/><path d="m20 20-4-4"/></svg> Sök övning …</div>
+          <div class="chiprow">
+            <span class="chip">Alla</span>
+            <span class="chip"><svg viewBox="0 0 24 24"><path d="M6 4h12l-1.5 8a4.5 4.5 0 0 1-9 0z"/><path d="M12 12v8"/></svg>Bröst</span>
+            <span class="chip sel"><svg viewBox="0 0 24 24"><path d="M7 4v7l5 9 5-9V4"/><path d="M7 8h10"/></svg>Rygg</span>
+            <span class="chip"><svg viewBox="0 0 24 24"><path d="M9 4v6l-2.5 9h4L12 13l1.5 6h4L15 10V4"/></svg>Ben</span>
+            <span class="chip"><svg viewBox="0 0 24 24"><path d="M4 12a8 8 0 0 1 16 0"/><circle cx="4" cy="14" r="2"/><circle cx="20" cy="14" r="2"/></svg>Axlar</span>
+            <span class="chip"><svg viewBox="0 0 24 24"><path d="M5 18l5-5m0 0 5-8 4 3-5 7-4-2z"/><circle cx="5" cy="19" r="2"/></svg>Armar</span>
+          </div>
+          <div class="chiprow">
+            <span class="chip small sel">Alla i Rygg</span>
+            <span class="chip small">Latsen</span>
+            <span class="chip small">Trapezius</span>
+            <span class="chip small">Ländrygg</span>
+          </div>
+          <div style="flex:1">
+            <div class="listrow"><div class="mchip"><svg viewBox="0 0 24 24"><path d="M4 12h16M7 8v8m10-8v8M4 10v4m16-4v4"/></svg></div>
+              <div class="grow"><div class="t">Marklyft <span class="star">★</span></div><div class="s">Rygg · Ben · senast 77,5 kg</div></div>
+              <span class="badge">KG</span><span class="badge">REPS</span></div>
+            <div class="listrow"><div class="mchip"><svg viewBox="0 0 24 24"><path d="M7 4v7l5 9 5-9V4"/><path d="M7 8h10"/></svg></div>
+              <div class="grow"><div class="t">Latsdrag <span class="star">★</span></div><div class="s">Latsen · senast 65 kg</div></div>
+              <span class="badge">KG</span><span class="badge">REPS</span></div>
+            <div class="listrow"><div class="mchip"><svg viewBox="0 0 24 24"><path d="M7 4v7l5 9 5-9V4"/><path d="M7 8h10"/></svg></div>
+              <div class="grow"><div class="t">Skivstångsrodd</div><div class="s">Rygg · Biceps</div></div>
+              <span class="badge">KG</span><span class="badge">REPS</span></div>
+            <div class="listrow"><div class="mchip"><svg viewBox="0 0 24 24"><path d="M4 6h16M8 6v4a4 4 0 0 0 8 0V6"/><path d="M12 14v6"/></svg></div>
+              <div class="grow"><div class="t">Pullups</div><div class="s">Latsen · kroppsvikt</div></div>
+              <span class="badge">REPS</span></div>
+            <div class="listrow"><div class="mchip"><svg viewBox="0 0 24 24"><path d="M7 4v7l5 9 5-9V4"/><path d="M7 8h10"/></svg></div>
+              <div class="grow"><div class="t">Ryggresning</div><div class="s">Ländrygg</div></div>
+              <span class="badge">REPS</span><span class="badge">TID</span></div>
+          </div>
+        </div>
+        <div class="gesture"><i></i></div>
+      </div></div>
+      <div class="phcaption">Övningsväljaren · Rygg valt</div>
+    </div>
+
+    <div class="notes">
+      <div class="note"><div class="dot">★</div><p><b>Favoriter alltid överst</b>
+      (API:ts favoritövningar), med senaste vikten som förhandsinfo så du slipper
+      minnas var du låg.</p></div>
+      <div class="note"><div class="dot">◐</div><p><b>Ikoner istället för foton:</b>
+      API:t saknar övningsbilder, så appen buntar vektorikoner per muskelgrupp —
+      offline, blixtsnabba, temafärgade. Vill du hellre ha en <b>kroppskarta där
+      vald muskel tänds</b> som filter är det samma dataunderlag — säg till vilken
+      du föredrar (kartan finns i sektion 5).</p></div>
+      <div class="note"><div class="dot">+</div><p><b>Ny övning på plats:</b> hittas
+      inte övningen visas "Skapa övningen ‹sökordet›" längst ned — grunddatan
+      behöver aldrig besökas mitt i ett pass.</p></div>
+    </div>
+  </div>
+</section>
+
+<!-- ============ 4. ANDROID-YTOR ============ -->
+<section>
+  <div class="secnum">4 / 6</div>
+  <h2>Utanför appen — noll tryck innan gymmet</h2>
+  <p class="secintro">Det webben aldrig kan: starta och styra pass utan att ens öppna appen.</p>
+  <div class="duo">
+    <div class="strips">
+      <div><div class="striplabel">Hemskärms-widget (4×2)</div>
+      <div class="widget">
+        <div class="wt"><b>FitnessDroid</b><span>3 v streak · 2 pass denna vecka</span></div>
+        <div class="wbtns">
+          <span class="wb pri">▶ Push A</span>
+          <span class="wb ton">▶ Ben &amp; core</span>
+          <span class="wb ton">Fritt pass</span>
+        </div>
+      </div></div>
+      <div><div class="striplabel">Långtryck på appikonen — genvägar</div>
+      <div class="noti" style="padding:9px 0;max-width:250px">
+        <div style="font-size:12.5px;font-weight:700;color:var(--m3-on);padding:6px 16px">▶ Starta Push A</div>
+        <div style="font-size:12.5px;font-weight:700;color:var(--m3-on);padding:6px 16px;border-top:1px solid var(--line)">▶ Starta fritt pass</div>
+        <div style="font-size:12.5px;font-weight:700;color:var(--m3-on);padding:6px 16px;border-top:1px solid var(--line)">📊 Veckans statistik</div>
+      </div></div>
+    </div>
+    <div class="strips">
+      <div><div class="striplabel">Skivkalkylatorn — tryck på vikten i passläget</div>
+      <div class="sheet">
+        <div class="grab"></div>
+        <h4>80,0 kg på stången</h4>
+        <div class="sub">Stång 20 kg · per sida:</div>
+        <div class="bar">
+          <span class="plate p5"></span><span class="plate p25"></span><span class="plate p10"></span><span class="plate p20"></span>
+          <span class="collar"></span><span class="shaft"></span><span class="collar"></span>
+          <span class="plate p20"></span><span class="plate p10"></span><span class="plate p25"></span><span class="plate p5"></span>
+        </div>
+        <div class="plates-txt">Per sida: <b>20 + 10 + 2,5 + 5</b> — dina skivor
+        ställs in en gång under Profil. Räknar även ut närmsta möjliga vikt.</div>
+      </div></div>
+    </div>
+  </div>
+</section>
+
+<!-- ============ 5. KROPPSKARTAN ============ -->
+<section>
+  <div class="secnum">5 / 6</div>
+  <h2>Kroppskartan — var hamnade veckans volym?</h2>
+  <p class="secintro">Statistikens signaturvy: en stiliserad figur där varje muskelgrupp
+  färgas efter träningsvolymen i perioden (datat finns redan i API:ts workoutStats).
+  Samma karta kan återanvändas som muskelväljare i övningsfiltret om du hellre vill
+  det än chips.</p>
+
+  <div class="bodymaps">
+    <div class="bodycard">
+      <figure>
+        <svg width="150" height="290" viewBox="0 0 100 195" role="img" aria-label="Kroppskarta framsida">
+          <circle cx="50" cy="12" r="9" fill="#233026"/>
+          <rect x="43" y="22" width="14" height="7" rx="3" fill="#233026"/>
+          <ellipse cx="35" cy="36" rx="9" ry="7" fill="#5f8f60"/>
+          <ellipse cx="65" cy="36" rx="9" ry="7" fill="#5f8f60"/>
+          <rect x="33" y="34" width="15" height="14" rx="6" fill="#8fd694"/>
+          <rect x="52" y="34" width="15" height="14" rx="6" fill="#8fd694"/>
+          <rect x="36" y="50" width="28" height="26" rx="8" fill="#3d5c42"/>
+          <rect x="22" y="40" width="8" height="24" rx="4" fill="#d3f0c9"/>
+          <rect x="70" y="40" width="8" height="24" rx="4" fill="#d3f0c9"/>
+          <rect x="21" y="66" width="7" height="20" rx="3.5" fill="#3d5c42"/>
+          <rect x="72" y="66" width="7" height="20" rx="3.5" fill="#3d5c42"/>
+          <rect x="34" y="80" width="13" height="42" rx="6" fill="#233026"/>
+          <rect x="53" y="80" width="13" height="42" rx="6" fill="#233026"/>
+          <rect x="36" y="126" width="10" height="30" rx="5" fill="#233026"/>
+          <rect x="54" y="126" width="10" height="30" rx="5" fill="#233026"/>
+        </svg>
+        <figcaption>Framsida</figcaption>
+      </figure>
+      <figure>
+        <svg width="150" height="290" viewBox="0 0 100 195" role="img" aria-label="Kroppskarta baksida">
+          <circle cx="50" cy="12" r="9" fill="#233026"/>
+          <rect x="40" y="22" width="20" height="10" rx="4" fill="#5f8f60"/>
+          <rect x="34" y="33" width="32" height="22" rx="8" fill="#3d5c42"/>
+          <rect x="38" y="57" width="24" height="18" rx="7" fill="#233026"/>
+          <rect x="22" y="40" width="8" height="24" rx="4" fill="#3d5c42"/>
+          <rect x="70" y="40" width="8" height="24" rx="4" fill="#3d5c42"/>
+          <rect x="21" y="66" width="7" height="20" rx="3.5" fill="#233026"/>
+          <rect x="72" y="66" width="7" height="20" rx="3.5" fill="#233026"/>
+          <rect x="35" y="77" width="30" height="14" rx="6" fill="#233026"/>
+          <rect x="34" y="93" width="13" height="32" rx="6" fill="#233026"/>
+          <rect x="53" y="93" width="13" height="32" rx="6" fill="#233026"/>
+          <rect x="36" y="128" width="10" height="28" rx="5" fill="#3d5c42"/>
+          <rect x="54" y="128" width="10" height="28" rx="5" fill="#3d5c42"/>
+        </svg>
+        <figcaption>Baksida</figcaption>
+      </figure>
+    </div>
+    <div class="notes" style="justify-content:center">
+      <div class="note"><div class="dot">→</div><p><b>Färgskalan är volym i perioden</b>
+      — här syns direkt att bröst/underarmar fått mest och att ben &amp; mage släpar.
+      Tryck på en muskel → övningarna och seten bakom siffran.</p></div>
+      <div class="heatlegend">Mindre
+        <i style="background:var(--heat0)"></i><i style="background:var(--heat1)"></i>
+        <i style="background:var(--heat2)"></i><i style="background:var(--heat3)"></i>
+        <i style="background:var(--heat4)"></i> Mer volym</div>
+      <div class="note" style="margin-top:10px"><div class="dot">✎</div><p>Figuren är
+      medvetet stiliserad (byggd av former, inte anatomisk) — den blir tydlig i litet
+      format, temafärgas och kräver inga bildlicenser. Vill du ha en mer anatomisk
+      siluett går det, men liten och skarp slår detaljerad och grötig på en telefon.</p></div>
+    </div>
+  </div>
+</section>
+
+<!-- ============ 6. NAVIGERING + API ============ -->
+<section>
+  <div class="secnum">6 / 6</div>
+  <h2>Navigeringen — chrome runt tre lägen</h2>
+  <p class="secintro">Med passläge + minispelare behövs färre flikar än webben har:
+  <b>Hem · Historik · Statistik · Profil</b> med startknappen i mitten (förslag B
+  från förra rundan). PB och kroppskartan bor i Statistik, grunddata och
+  skivinställningar under Profil. Fritt pass, favoriter, widget och appgenvägar
+  gör att flikarna nästan aldrig behövs på väg <i>in</i> i ett pass — de är för
+  uppföljningen.</p>
+
+  <h2 style="margin-top:36px">Små API-tillägg som lyfter appen</h2>
+  <p class="secintro">Inget av detta blockerar bygget — appen kan falla tillbaka på
+  vettiga defaultvärden tills de finns.</p>
+  <div class="tablewrap"><table>
+    <tr><th>Tillägg</th><th>Vad det ger</th><th>Storlek</th></tr>
+    <tr><td>MuscleGroup.iconKey</td>
+      <td>Servern pekar ut vilken ikon en muskelgrupp har istället för att appen
+      gissar på namnsträngar ("Bröst" vs "Chest"). En kolumn + fält i GraphQL.</td>
+      <td><span class="pill-sm s">LITEN</span></td></tr>
+    <tr><td>ExerciseType.defaultRestSeconds</td>
+      <td>Auto-vilotimern vet hur länge just den övningen vilar (90 s bänk, 180 s
+      marklyft). Fallback i appen: 90 s. Kolumn + fält + med i mallexport.</td>
+      <td><span class="pill-sm s">LITEN</span></td></tr>
+    <tr><td>Lift/Set: clientId (UUID)</td>
+      <td>Offline-läge på gymmet: appen kan köa set lokalt och synka i efterhand utan
+      dubbletter när samma mutation skickas om. Unik kolumn + upsert-logik.</td>
+      <td><span class="pill-sm m">MEDEL · roadmap</span></td></tr>
+    <tr><td>ExerciseType.imageUrl</td>
+      <td>Frivillig påbyggnad om du senare vill ha riktiga foton/anatomibilder per
+      övning — appen visar dem när de finns, ikoner annars.</td>
+      <td><span class="pill-sm s">LITEN · valfri</span></td></tr>
+  </table></div>
+
+  <div class="decide">
+    <h2>Det jag behöver från dig</h2>
+    <ol>
+      <li><b>Passläget:</b> köper du "en övning i taget + svep + vilo-takeover", eller
+      vill du hellre se hela passet som scrollbar lista med allt synligt?</li>
+      <li><b>Muskelfiltret:</b> chips med ikoner (sektion 3) eller kroppskartan
+      (sektion 5) som väljare — eller båda (chips snabbt, karta bakom en knapp)?</li>
+      <li><b>Android-ytorna:</b> vilka vill du ha i första versionen — notistimer,
+      widget, appgenvägar, skivkalkylator? (Notistimern föreslår jag ingår direkt,
+      resten kan komma stegvis.)</li>
+      <li><b>API-tilläggen:</b> ok att jag gör iconKey + defaultRestSeconds i
+      gym-API:t (byggs och rullas ut via befintliga CI:t)?</li>
+    </ol>
+  </div>
+</div>

doc/openscale-integration.md

@@ -0,0 +1,133 @@
+# openScale BT-vågar — integrationsplan
+
+Bygga in [openScale](https://github.com/oliexdev/openScale):s Bluetooth-
+drivrutiner i FitnessDroid så att vägningar (vikt + %muskler/fett/vatten)
+kan hämtas direkt från en BT-våg in i appens kroppsmätningar.
+
+## Beslut (2026-07-26)
+
+- **Licens: FitnessDroid relicensas till GPL-3.0.** openScale är GPL-3.0;
+  att bädda in deras kod kräver att hela appen blir GPL-3.0. LICENSE byts,
+  och källfilerna som kommer från openScale behåller sina copyright-headers.
+- **Alla drivrutiner portas** (hela `core/bluetooth`-paketet, ~55 handlers +
+  adaptrar), inte bara en modell. `ScaleFactory` auto-detekterar vågen vid
+  skanning precis som i openScale.
+- **Attribution:** en **About**-vy under Profil som anger att appen använder
+  openScales drivrutiner, med länk till deras GitHub och GPL-3.0-licensen,
+  plus en lista på öppen källkod som används (openScale, Blessed-Kotlin).
+
+## Teknik (bekräftat från repot)
+
+- openScale använder **Blessed-Kotlin** (coroutine-BLE-wrapper) — läggs till
+  som Gradle-beroende; vi portar drivrutinerna som ligger ovanpå, inte
+  BLE-plumbingen.
+- `ScaleDeviceHandler.supportFor(device)` → `DeviceSupport` (displayName,
+  linkMode, tuningProfile). `ScaleFactory` returnerar första matchande handler.
+- Tre kopplingslägen: `CONNECT_GATT`, `BROADCAST_ONLY`, `CLASSIC_SPP` med var
+  sin adapter (Gatt/Broadcast/Spp).
+- `ScaleMeasurement` bär weight, fat, water, muscle, visceralFat, bone, lbm,
+  bmr, protein, impedance m.m. → vi mappar weight + muscle/fat/water till vår
+  `BodyMeasurement` (resten kan tas in senare).
+- minSdk 31 matchar vår app (BLE-permissions `BLUETOOTH_SCAN`/`_CONNECT`).
+
+## Fallgrop: impedansvågar behöver användarprofil
+
+Vissa vågar skickar bara **rå impedans**; openScale räknar då själv ut
+fett/muskler/vatten med en formel som kräver **längd, ålder, kön** (ScaleUser).
+Vi måste därför:
+- Lägga till längd/födelseår/kön i profilen (se API-ändring nedan).
+- Porta openScales BIA-beräkning för de vågar som kräver den.
+Vågar som räknar ombord och skickar färdiga procent behöver inte detta.
+
+## API-ändring: spara användarens längd (+ ålder/kön)
+
+Längden ska sparas **på servern** (gym-API:t) så att den är gemensam för app
+och webb, överlever ominstallation, och kan användas för mer korrekta
+beräkningar:
+
+- **BIA/kroppssammansättning:** openScales formler för impedansvågar kräver
+  längd (+ ålder + kön) för att ge korrekta %fett/muskler/vatten.
+- **Energiförbrukning:** med längd (+ ålder + kön) kan kaloriberäkningen gå
+  från ren MET × vikt × tid till en BMR-baserad uppskattning
+  (Mifflin–St Jeor: `10·vikt + 6.25·längd − 5·ålder + könskonstant`), vilket
+  ger rimligare siffror per pass.
+
+**Backend (brasse-pc.eu-v2, gym-api):**
+- Utöka `User` med `HeightCm` (double?), och för full BIA även `BirthDate`
+  (eller `BirthYear`) och `Sex` (enum/sträng). Nullable + bakåtkompatibla.
+- Migration (körs automatiskt vid uppstart, samma mönster som
+  `BodyMeasurement`).
+- Exponera i `myProfile`-query och en `updateProfile`-mutation (eller utöka
+  `updateBodyWeight` → `updateProfile` med längd/ålder/kön).
+- Deploya om gym-api-prod + -test (serialiserat bygge, se
+  [[pi5-ci-concurrency]]).
+
+**App:** profil-fält för längd (och ålder/kön) som läser/skriver mot API:t;
+cachas lokalt (som kroppsvikten) för offline och för BIA-beräkningen.
+
+**Webb (brasse-pc.eu-v2):** samma fält på profil-fliken via `updateProfile`.
+
+## Användarens våg (identifierad 2026-08-23)
+
+**Biltema 84-1002 "Bluetooth Analyser Scale", modell PT-727** (Ningbo Putian).
+Annonserar som BLE-namnet **"VScale"** (verifierat med `bluetoothctl` på
+brasse-linux01: `Device C4:BE:84:79:D0:6C VScale`) → openScales
+**`ExingtechY1Handler`** matchar (exakt namnmatch `vscale`).
+
+Protokoll (GATT): appen skriver `[0x10, userId, kön, ålder, längd_cm]` till
+vågen; vågen räknar ut kroppssammansättningen **ombord** och notifierar en
+20-bytes-ram (vikt, fett-%, vatten-%, muskel-%, benmassa kg, bukfettsindex).
+Ingen BIA-formel behövs i appen — men längd/födelseår/kön måste finnas.
+
+**Lärdom från första testet (2026-08-23):** utan ifylld kroppsdata
+(längd/födelseår/kön) skickar vågen bara vikt — sammansättningen uteblir
+tyst. Väg-skärmen varnar numera tydligt när kroppsdata saknas, och håller
+dessutom anslutningen öppen och mergar ramar (vågen kan skicka vikten först
+och sammansättningen i en senare ram; max 20 s väntan).
+
+Hårdvarudetaljer från GATT-dump (openScales debug-läge): tillverkarsträng
+**"VTrump"**, modellnummer **V300B1000001** — dvs. en VTrump-OEM. Notify-
+tecknet `1a2ea400…` ligger i service `78667579-7b48…` (inte i `f433bd80…` som
+klassiska Y1), och `f433bd80…` har ett extra notify-tecken `23b4fec0…`.
+Fungerar ändå med `ExingtechY1Handler` — bra att veta vid framtida felsökning.
+
+## Milstolpar (byggbara steg)
+
+1. **Grund + licens + About** *(klar 2026-08-23)* — LICENSE → GPL-3.0;
+   `blessed-kotlin` 3.0.12 via JitPack (krävde Kotlin 2.0.21→2.2.0, KSP2,
+   Room 2.7.2); BLE-permissions (`BLUETOOTH_SCAN` neverForLocation +
+   `BLUETOOTH_CONNECT`); About-vy under Profil med GPL-attribution.
+2. **Porta bluetooth-paketet (grund)** *(klar 2026-08-23)* — vendrat
+   `com.health.openscale.core.bluetooth` med copyright-headers kvar:
+   ScaleDeviceHandler, Gatt/Broadcast/Spp-adaptrar, ScaleFactory (utan Hilt),
+   ScaleCommunicator, BleScanner, ConverterUtils, ScaleMeasurement/ScaleUser,
+   samt **ExingtechY1Handler**. Shims i samma paketnamn för openScales
+   interna beroenden (facades → DataStore, slimmade enums, LogManager →
+   logcat), så fler drivrutiner kan portas nästan rakt av.
+   *Kvar: resterande ~59 handlers + libs/ portas allteftersom.*
+3. **Skanna + koppla** *(klar 2026-08-23)* — Inställningar → Bluetooth-våg:
+   BLE-skanning, vågar med drivrutinsstöd överst (drivrutinsnamn visas),
+   spara/ta bort vald våg. Runtime-permission-flöde.
+4. **Väg dig-flöde** *(klar och verifierad mot Biltema-vågen 2026-08-23)* — knapp i
+   profilen → väg-skärm med livestatus, resultat och spara via
+   `addBodyMeasurement`. Kroppsdata (längd/födelseår/kön) i profilen skickas
+   till vågen. Vikt + muskel/fett/vatten-% bekräftade end-to-end.
+5. **API: längd (+ ålder/kön)** — utöka gym-API:ts `User` med `HeightCm`
+   (+ `BirthDate`/`Sex`), migration, `myProfile` + `updateProfile`, deploy.
+   App + webb får profilfält; appens lokala kroppsdata börjar synka mot
+   API:t. Se "API-ändring" ovan.
+6. **Fler drivrutiner + impedansvågar + bättre kalorier** — porta resterande
+   handlers + `libs/` (BIA-beräkningar för vågar som skickar rå impedans),
+   och BMR-baserad energiförbrukning.
+7. **Polering + docs** — felhantering, timeouts, ominställning av våg;
+   uppdatera README/wiki + infra-Doc (GPL-relicens noterad).
+
+## Öppna frågor / risker
+
+- ~~Vilken våg du har~~ → Biltema PT-727 = Exingtech Y1 ("VScale"), räknar
+  ombord — milstolpe 6:s BIA behövs inte för den.
+- ~~Blessed-Kotlins koordinater~~ → `com.github.weliem:blessed-kotlin:3.0.12`
+  (JitPack). Byggd med Kotlin 2.2 → tvingade upp projektets Kotlin/KSP/Room.
+- APK växer (drivrutiner + BLE-lib) — troligen någon MB, oproblematiskt.
+- GPL-relicens är permanent för koden; medvetet val.
+- ~~Väg-flödet är obekräftat~~ → verifierat mot Biltema-vågen 2026-08-23 (vikt + sammansättning).

doc/plan.md

@@ -28,13 +28,46 @@ mallar, grunddata och profil.
 
 ## Milstolpar
 
-1. **Grund + login** *(klar i och med första commit)*
+1. **Grund + login** *(klar 2026-07-23)*
    Projektskelett som kompilerar, inloggning mot API:t med sessions-
    återställning vid appstart, hemskärm som visar profilen.
-2. **Aktivt pass** — starta/återuppta pass, lägga till övningar, logga set
-   (reps/vikt/distans/tid/RPE), vilotimer, passtimer, avsluta pass.
-   Fälten styrs av övningens tracks-flaggor precis som i webben.
-3. **Passhistorik** — lista, visa, redigera och ta bort tidigare pass.
+2. **Aktivt pass** *(klar 2026-07-24)* — passläge med en övning i taget
+   (svep), ±steppers och ett-trycks setloggning med förifyllda värden,
+   vilotimer (helskärm/banner + larm/vibration/visuell/inget — inställbart),
+   offline-först via Room + synk-kö med statusindikatorer, övningsväljare
+   med muskelfilter, bottenrad-navigation med start-FAB och minispelare.
+   API-tillägg: `MuscleGroup.iconKey`, `ExerciseType.defaultRestSeconds`.
+   *Polering 2026-07-24/25:* rätta/ta bort loggade set, passdetaljvy i
+   historiken, övningshistorik i passläget (tidigare pass + tyngsta 3 mån),
+   avsluta-överblick med redigerbar start/varaktighet (date/time-pickers,
+   hopfällt bakom "Ändra tid"), kcal-summering med "Hur räknas detta?"
+   (MET × kroppsvikt × timmar, även i historiken) och 🏆-markering av
+   nya personbästa per rep-antal (PB-cache i Room).
+3. **Statistik + robust inloggning** *(klar 2026-07-25, version 0.3.0)* —
+   statistikfliken med periodväljare (vecka/månad/halvår/år/totalt),
+   KPI-kort med delta mot förra perioden, scrollbar volymtrend,
+   kroppskarta (fram/bak, volymvärme per muskelgrupp), höjdpunkter och
+   PB-lista per övning. Tyst återinloggning: uppgifterna sparas
+   AES-krypterat via Android Keystore och appen loggar in igen automatiskt
+   när servern avvisat sessionen (aktiveras vid inloggning; toggle i
+   inställningarna). Utökade inställningar: viktsteg (1,25/2,5/5 kg),
+   API-url, auto-återinloggning, egna stångvikter.
+   *Dessutom:* **in-app-uppdatering** (CI publicerar version.json;
+   hemskärmskort laddar ner, sha256-verifierar och installerar),
+   **skivkalkylator** (tryck på vikten i aktiva setet; stång 20/0/egna,
+   skivor i standardfärger), **passlängd** i historiken, och
+   **kroppsviktspårning**: API-modellen BodyMeasurement (uuid, datum,
+   vikt + muskel/fett/vatten-% för framtiden), uppdatera/rätta/ta bort
+   mätningar från profilen med datumväljare, viktgraf i statistiken med
+   glidande medelvärde och linjär trendlinje. Profilens bodyWeightKg
+   speglar alltid senaste mätningen.
+4. **BT-våg via openScale-drivrutiner** *(påbörjad 2026-08-23 — milstolpe 1–4
+   klara, väntar på fysiskt vågtest)* — hämta vägningar (vikt +
+   %muskler/fett/vatten) direkt från en Bluetooth-våg genom att bädda in
+   openScales drivrutiner. Relicensierad till GPL-3.0. Först ut:
+   Biltema 84-1002 (PT-727) = Exingtech Y1 ("VScale"). Full plan:
+   [`doc/openscale-integration.md`](openscale-integration.md).
+5. **Passhistorik** — lista, visa, redigera och ta bort tidigare pass.
 4. **Logga lyft (snabbloggning) + PB** — enkel lyftlogg och PB-matrisen.
 5. **Statistik** — perioder (vecka/månad/halvår/år), KPI-kort, trenddiagram,
    muskelfördelning, aktivitets-heatmap.

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 agp = "8.7.3"
-kotlin = "2.0.21"
+kotlin = "2.2.0"
 coreKtx = "1.15.0"
 lifecycle = "2.8.7"
 activityCompose = "1.9.3"
@@ -9,6 +9,11 @@ navigationCompose = "2.8.5"
 okhttp = "4.12.0"
 kotlinxSerialization = "1.7.3"
 datastore = "1.1.1"
+room = "2.7.2"
+ksp = "2.2.0-2.0.2"
+blessedKotlin = "3.0.12"
+osmdroid = "6.1.20"
+healthConnect = "1.1.0-alpha07"
 
 [libraries]
 androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
@@ -26,9 +31,16 @@ androidx-navigation-compose = { group = "androidx.navigation", name = "navigatio
 androidx-datastore-preferences = { group = "androidx.datastore", name = "datastore-preferences", version.ref = "datastore" }
 okhttp = { group = "com.squareup.okhttp3", name = "okhttp", version.ref = "okhttp" }
 kotlinx-serialization-json = { group = "org.jetbrains.kotlinx", name = "kotlinx-serialization-json", version.ref = "kotlinxSerialization" }
+androidx-room-runtime = { group = "androidx.room", name = "room-runtime", version.ref = "room" }
+androidx-room-ktx = { group = "androidx.room", name = "room-ktx", version.ref = "room" }
+androidx-room-compiler = { group = "androidx.room", name = "room-compiler", version.ref = "room" }
+blessed-kotlin = { group = "com.github.weliem", name = "blessed-kotlin", version.ref = "blessedKotlin" }
+osmdroid = { group = "org.osmdroid", name = "osmdroid-android", version.ref = "osmdroid" }
+health-connect = { group = "androidx.health.connect", name = "connect-client", version.ref = "healthConnect" }
 
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }
 kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
 kotlin-compose = { id = "org.jetbrains.kotlin.plugin.compose", version.ref = "kotlin" }
 kotlin-serialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "kotlin" }
+ksp = { id = "com.google.devtools.ksp", version.ref = "ksp" }

settings.gradle.kts

@@ -16,6 +16,10 @@ dependencyResolutionManagement {
     repositories {
         google()
         mavenCentral()
+        // Blessed-Kotlin (BLE-biblioteket som openScale-drivrutinerna använder) finns bara på JitPack
+        maven("https://jitpack.io") {
+            content { includeGroup("com.github.weliem") }
+        }
     }
 }