Add Gitea Actions release workflow + combined VS Code build task

CI on push to master/main: cargo test, native arm64 build on the Pi5
runner, cross-compiled x64 build, rolling 'latest' release with both
binaries and checksums.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

.gitea/workflows/release.yaml

@@ -0,0 +1,68 @@
+name: release
+
+# På varje push till master/main: kör tester, bygg release-binärer för
+# linux arm64 (nativt på Pi5-runnern) + linux x64 (cross) och lägg dem
+# på en rullande "latest"-release på släppsidan i Gitea.
+on:
+  push:
+    branches: [master, main]
+  workflow_dispatch: {}
+
+jobs:
+  build-release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Installera Rust + cross-toolchain
+        run: |
+          set -e
+          sudo apt-get update -qq
+          sudo apt-get install -y -qq gcc-x86-64-linux-gnu jq curl
+          curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs \
+            | sh -s -- -y --profile minimal --default-toolchain stable
+          . "$HOME/.cargo/env"
+          rustup target add x86_64-unknown-linux-gnu
+
+      - name: Testa + bygg (arm64 nativt + x64 cross)
+        run: |
+          set -e
+          . "$HOME/.cargo/env"
+          # Snäll mot Pi5:n — låg prio och max 2 parallella jobb
+          export CARGO_BUILD_JOBS=2
+          nice -n 10 cargo test --release
+          nice -n 10 cargo build --release
+          export CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_LINKER=x86_64-linux-gnu-gcc
+          nice -n 10 cargo build --release --target x86_64-unknown-linux-gnu
+          mkdir -p build
+          cp target/release/tui-wm build/tui-wm-linux-arm64
+          cp target/x86_64-unknown-linux-gnu/release/tui-wm build/tui-wm-linux-x64
+          (cd build && sha256sum tui-wm-linux-* > checksums.txt && ls -la)
+
+      - name: Skapa/uppdatera latest-release + ladda upp binärer
+        env:
+          API: http://gitea-d:3000/api/v1
+          REPO: ${{ github.repository }}
+          TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          set -e
+          TAG="latest"
+          BODY="Rullande bygge från senaste master. Commit: ${{ github.sha }}. Arkitekturer: linux x64 + arm64 (Pi5)."
+          rid=$(curl -s -X POST "$API/repos/$REPO/releases" \
+            -H "Authorization: token $TOKEN" -H 'Content-Type: application/json' \
+            -d "{\"tag_name\":\"$TAG\",\"name\":\"$TAG\",\"body\":\"$BODY\"}" | jq -r '.id // empty')
+          [ -z "$rid" ] && rid=$(curl -s "$API/repos/$REPO/releases/tags/$TAG" \
+            -H "Authorization: token $TOKEN" | jq -r '.id')
+          echo "release id: $rid"
+          for f in tui-wm-linux-x64 tui-wm-linux-arm64 checksums.txt; do
+            aid=$(curl -s "$API/repos/$REPO/releases/$rid/assets" \
+              -H "Authorization: token $TOKEN" | jq -r ".[] | select(.name==\"$f\") | .id")
+            if [ -n "$aid" ] && [ "$aid" != "null" ]; then
+              curl -s -X DELETE "$API/repos/$REPO/releases/$rid/assets/$aid" \
+                -H "Authorization: token $TOKEN" -o /dev/null
+            fi
+            curl -s -X POST "$API/repos/$REPO/releases/$rid/assets?name=$f" \
+              -H "Authorization: token $TOKEN" \
+              -F "attachment=@build/$f" -o /dev/null -w "  $f -> HTTP %{http_code}\n"
+          done

.vscode/tasks.json

@@ -1,6 +1,16 @@
 {
   "version": "2.0.0",
   "tasks": [
+    {
+      "label": "Build alla (Linux + Windows)",
+      "type": "shell",
+      "command": "cargo build --release && cargo build --release --target x86_64-pc-windows-gnu && mkdir -p builds/linux/panels builds/win/panels && cp target/release/tui-wm builds/linux/tui-wm && cp target/x86_64-pc-windows-gnu/release/tui-wm.exe builds/win/tui-wm.exe && cp dist/linux/config.toml builds/linux/config.toml && cp dist/linux/panels/topbar.toml builds/linux/panels/topbar.toml && cp dist/win/config.toml builds/win/config.toml && cp dist/win/panels/topbar.toml builds/win/panels/topbar.toml && echo 'Done: builds/linux/tui-wm + builds/win/tui-wm.exe'",
+      "options": { "shell": { "executable": "bash", "args": ["-c"] } },
+      "group": "build",
+      "presentation": { "reveal": "always", "panel": "shared" },
+      "problemMatcher": ["$rustc"],
+      "detail": "Bygger båda binärerna: Linux (native) + Windows (kräver mingw-w64)"
+    },
     {
       "label": "Build (native)",
       "type": "shell",