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>

.gitignore

@@ -0,0 +1,36 @@
+# Umgebungsvariablen (Passwörter etc.)
+.env
+
+# Claude Code lokale Einstellungen
+.claude/
+
+# Laufzeit-Daten
+data/db/*.db
+data/hls_cache/
+data/logs/
+data/covers/
+
+# Python
+__pycache__/
+*.py[cod]
+*.pyo
+.venv/
+venv/
+*.egg-info/
+dist/
+build/
+
+# Node / Frontend
+frontend/node_modules/
+frontend/dist/
+
+# IDE
+.vscode/
+.idea/
+*.swp
+
+# macOS
+.DS_Store
+
+# Windows
+Thumbs.db