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>

backend/app/schemas/media_item.py

@@ -0,0 +1,115 @@
+from pydantic import BaseModel, ConfigDict
+from pydantic.alias_generators import to_camel
+from datetime import datetime
+from typing import Any
+
+
+class AudioFileMetadata(BaseModel):
+    model_config = ConfigDict(alias_generator=to_camel, populate_by_name=True)
+    filename: str
+    ext: str
+    path: str
+    rel_path: str = ""
+    size: int = 0
+
+
+class AudioFileOut(BaseModel):
+    model_config = ConfigDict(alias_generator=to_camel, populate_by_name=True)
+    index: int
+    ino: str = ""
+    metadata: AudioFileMetadata
+    added_at: int = 0
+    updated_at: int = 0
+    track_num_from_meta: int | None = None
+    disc_num_from_meta: int | None = None
+    format: str = ""
+    duration: float = 0.0
+    bitrate: int = 0
+    language: str | None = None
+    codec: str = ""
+    time_base: str = "1/44100"
+    channels: int = 2
+    channel_layout: str = "stereo"
+    chapters: list = []
+    embedded_cover_art: str | None = None
+    mime_type: str = "audio/mpeg"
+
+
+class ChapterOut(BaseModel):
+    model_config = ConfigDict(alias_generator=to_camel, populate_by_name=True)
+    id: int
+    start: float
+    end: float
+    title: str
+
+
+class BookMetadata(BaseModel):
+    model_config = ConfigDict(alias_generator=to_camel, populate_by_name=True)
+    title: str | None = None
+    subtitle: str | None = None
+    authors: list[dict] = []  # [{"id": null, "name": "..."}]
+    narrators: list[str] = []
+    series: list[dict] = []  # [{"id": null, "name": "...", "sequence": "..."}]
+    genres: list[str] = []
+    published_year: str | None = None
+    published_date: str | None = None
+    publisher: str | None = None
+    description: str | None = None
+    isbn: str | None = None
+    asin: str | None = None
+    language: str | None = None
+    explicit: bool = False
+    abridged: bool = False
+
+
+class BookOut(BaseModel):
+    model_config = ConfigDict(alias_generator=to_camel, populate_by_name=True)
+    library_item_id: str
+    metadata: BookMetadata
+    cover_path: str | None = None
+    tags: list[str] = []
+    audio_files: list[AudioFileOut] = []
+    chapters: list[ChapterOut] = []
+    missing_parts: list = []
+    ebookFile: Any = None
+    duration: float = 0.0
+    size: int = 0
+    tracks: list[AudioFileOut] = []
+    num_tracks: int = 0
+    num_audio_files: int = 0
+    num_chapters: int = 0
+    num_missing_parts: int = 0
+    num_invalid_audio_files: int = 0
+    is_missing: bool = False
+    is_invalid: bool = False
+
+
+class LibraryItemOut(BaseModel):
+    model_config = ConfigDict(alias_generator=to_camel, populate_by_name=True)
+    id: str
+    ino: str = ""
+    library_id: str
+    folder_id: str = ""
+    path: str
+    rel_path: str = ""
+    is_file: bool = False
+    mtime_ms: int = 0
+    ctime_ms: int = 0
+    birth_time_ms: int = 0
+    added_at: int = 0
+    updated_at: int = 0
+    last_scan: int | None = None
+    scan_version: str | None = None
+    is_missing: bool = False
+    is_invalid: bool = False
+    media_type: str = "book"
+    media: BookOut | None = None
+    num_files: int = 0
+    size: int = 0
+
+
+class LibraryItemUpdateRequest(BaseModel):
+    metadata: dict | None = None
+    tags: list[str] | None = None
+    chapters: list[dict] | None = None
+    cover_path: str | None = None