Builds a new Your Albums section on the Discover page that aggregates
saved/liked albums from all connected services, mirroring the Your Artists
pattern. Deezer works via both OAuth and ARL.
- tidal_client: add get_favorite_albums() with V2/V1 API fallback
- deezer_client: add get_user_favorite_albums() via OAuth (user/me/albums)
- deezer_download_client: add get_user_favorite_albums() via ARL session
- music_database: add liked_albums_pool table (deduped by artist::album
normalized key), upsert_liked_album, get_liked_albums,
get_liked_albums_last_fetch, clear_liked_albums
- web_server: GET /api/discover/your-albums (ownership-checked, paginated),
GET /api/discover/your-albums/sources, POST /api/discover/your-albums/refresh,
_fetch_liked_albums background worker (Spotify + Tidal + Deezer OAuth/ARL)
- frontend: Your Albums section with source selector cog, album grid reusing
spotify-library-card styles, search/filter/sort/pagination, download missing
button, auto-refresh poll on first load
Also fix: Deezer greyed out in Your Artists sources when using ARL — connection
check now accepts ARL auth (deezer_dl.is_authenticated()) in addition to OAuth,
and _fetch_and_match_liked_artists falls back to ARL client for artist fetching.