- Add MusicBrainz to Cache Browser: stats pill, source filter, dedicated
browse endpoint, cards with matched/failed status indicators
- Add Clear MusicBrainz and Clear Failed MB Only to cache clear dropdown
- Move MusicBrainz into Cache Health "By Source" bar chart alongside
Spotify/iTunes/Deezer instead of isolated metric row
- Rename ambiguous "Failed Lookups" to "Failed MB Lookups" in summary cards
- Add browse-musicbrainz and clear-musicbrainz API endpoints
- Add musicbrainz_total/musicbrainz_failed to cache stats response
- Add Global Search Bar and MusicBrainz cache to changelogs
Cache maintenance:
- Input validation rejects junk entities (Unknown Artist, empty names)
from being cached, with exemptions for synthetic entries (_features,
_tracks suffixes)
- CacheEvictorJob expanded to 4 phases: TTL eviction, junk cleanup,
orphaned search cleanup, MusicBrainz failed lookup cleanup
- MusicBrainz null results now expire after 30 days (was 90) so failed
lookups get retried sooner
Cache health UI:
- Polished modal accessible from Dashboard "Cache Health" button and
repair dashboard health bar
- Shows health status banner (healthy/fair/poor), stat cards, source
breakdown with colored progress bars, type pills, and metrics table
- Repair dashboard shows compact bar with health dot indicator
Genre explorer and deep dive modal now combine data from all available
metadata sources (iTunes + Deezer always, Spotify when authenticated).
Artists are deduplicated by name across sources, preferring entries
with images. Source dots (green/red/purple) indicate data origin.
Deezer genre support:
- Extract genre_id from Deezer album search responses via ID-to-name
mapping table (26 Deezer genre categories)
- Extract full genre names from Deezer get_album responses
- One-time backfill updates existing cached albums from stored raw_json
- Propagate album genres to Deezer artist entities
Cross-source album routing:
- /api/discover/album endpoint uses source-specific client (iTunes or
Deezer) based on the item's source, not just the active fallback
- Spotify path falls back to active fallback when album not found
- Track clicks use album_id directly instead of name-based resolution
- resolve-cache-album adds partial match and live search fallback
Other fixes:
- Genre explorer positioned at top of Discover page (below hero)
- Genre explorer results cached 24hr in-memory for fast reload
- Related genres computed from all albums by matched artists
- Artist clicks open Artists page with discography (not library detail)
- Discovery pool genre queries restored to source-filtered (Browse by
Genre tabs stay source-isolated as designed)
- Stats page: database storage donut chart with per-table breakdown and total size
- Discover page: 5 new sections mined from metadata cache (zero API calls):
Undiscovered Albums, New In Your Genres, From Your Labels, Deep Cuts, Genre Explorer
- Genre Deep Dive modal: artists (clickable → artist page), popular tracks,
albums with download flow, related genre pills, in-library badges
- All cache queries filtered by active metadata source (Spotify/iTunes/Deezer)
- Stale cache entries (404) gracefully fall back to name+artist resolution
- Album cards show "In Library" badge, artist avatars scaled by prominence
- Fix enrichment progress never updating: remove `continue` that skipped
progress_callback for successful tracks in enrich_chart_tracks
- Split chart/extract into two-step flow: extract raw tracks, then enrich
via polling endpoint with live progress overlay updates
- Move Beatport enrichment cache to persistent metadata cache system
- Fix metadata cache detail modal for Beatport (URL entity_ids with slashes)
- Add per-source Clear dropdown (Spotify/iTunes/Deezer/Beatport) to cache browser
- Remove debug logging from enrichment progress tracking
Users can now choose between iTunes/Apple Music and Deezer as their free
metadata source in Settings. Spotify always takes priority when authenticated;
the fallback handles all lookups when it's not.
Core changes:
- DeezerClient: full metadata interface (search, albums, artists, tracks)
matching iTunesClient's API surface with identical dataclass return types
- SpotifyClient: configurable _fallback property switches between iTunes/Deezer
based on live config reads (no restart needed)
- MetadataService, web_server, watchlist_scanner, api/search, repair_worker,
seasonal_discovery, personalized_playlists: all direct iTunesClient imports
replaced with fallback-aware helpers
Database:
- deezer_artist_id on watchlist_artists and similar_artists tables
- deezer_track_id/album_id/artist_id on discovery_pool and discovery_cache
- Full CRUD for Deezer IDs: add, read, update, backfill, metadata enrichment
- Watchlist duplicate detection by artist name prevents re-adding across sources
- SimilarArtist dataclass and all query/insert methods handle Deezer columns
Bug fixes found during review:
- Similar artist backfill was writing Deezer IDs into iTunes columns
- Discover hero was storing resolved Deezer IDs in wrong column
- Status cache not invalidating on settings save (source name lag)
- Watchlist add allowing duplicates when switching metadata sources
