Initial commit: Phase 1 – Projektstruktur, DB-Schema, Core-API

- FastAPI-Backend mit vollständiger ABS v2.x API-Kompatibilität
- SQLAlchemy-Models: User, Library, LibraryItem, BookFile, Chapter,
  Podcast, PodcastEpisode, MediaProgress, Bookmark, PlaybackSession
- Auth: JWT-Login (/login, /logout, /api/authorize)
- Library + Items Endpoints inkl. camelCase ABS-Response-Format
- HLS-Streaming via FFmpeg (POST /api/items/:id/play, Session-Sync)
- Me/Progress Endpoints + Lesezeichen
- User-Management + Server-Settings (Admin)
- Library-Scanner (MP3/WAV Discovery, Hintergrund-Task)
- File Watcher (watchdog, 30s Debounce)
- Matching-Skelett (MusicBrainz, OpenLibrary, Google Books – Phase 5)
- Docker-Setup: backend (Python 3.12+FFmpeg), frontend (React/Vite),
  nginx Reverse-Proxy auf Port 3000
- setup.sh: Installiert Docker auf Debian/Ubuntu, richtet .env ein

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.env.example

@@ -0,0 +1,20 @@
+# Server
+SERVER_PORT=3000
+JWT_SECRET=change_me_in_production_use_a_long_random_string
+
+# Admin-Account (wird beim ersten Start angelegt)
+ADMIN_USERNAME=admin
+ADMIN_PASSWORD=changeme
+ADMIN_EMAIL=admin@example.com
+
+# Pfade
+AUDIOFILES_PATH=./audiofiles
+DATABASE_URL=sqlite+aiosqlite:////app/data/db/audiolib.db
+HLS_CACHE_DIR=/app/data/hls_cache
+COVERS_DIR=/app/data/covers
+LOG_DIR=/app/data/logs
+
+# Matching (true/false)
+AUTO_MATCH_BOOKS=true
+AUTO_MATCH_PODCASTS=true
+PODCAST_UPDATE_INTERVAL_HOURS=24