Milstolpe 1: skelett — Fastify-backend med login, Vue-frontend (mörkt Jellyseerr-tema), Dockerfile

- backend: /api/health, /api/login|logout|session, sessionscookie,
  timingSafeEqual-lösenordskoll, allt annat under /api kräver inloggning,
  serverar byggd frontend med SPA-fallback; 4 tester (node:test)
- frontend: Vue 3 + Vite, login-sida, Upptäck-skal, sökfält (stub),
  mörkt tema enligt Jellyseerr-förlagan
- docker: multi-stage arm64-image; config-plumbing för Lidarr/Jellyfin/
  Gemini via env (Jellyfin-historik prioriterad som signal per Björn)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01824ZrvG2mDYYrmwqypLNup

frontend/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "lyssnarr-frontend",
+  "private": true,
+  "version": "0.1.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "vue": "^3.5.13",
+    "vue-router": "^4.5.0"
+  },
+  "devDependencies": {
+    "@vitejs/plugin-vue": "^5.2.3",
+    "vite": "^6.3.5"
+  }
+}