New feature: Failed MusicBrainz Lookups management modal accessible
from Cache Health. Browse all failed lookups with type filter tabs,
search bar, pagination. Click any entry to search MusicBrainz and
manually match — saves MBID at 100% confidence. Clear individual
entries or bulk clear all.
Backend: 4 new endpoints — failed-mb-lookups list, mb-entry delete,
musicbrainz/search (artist/release/recording), mb-match save.
Performance: Cache health stats consolidated from 11 queries to 4
using CASE expressions. Added partial index on musicbrainz_cache for
failed lookups. Dashboard cache stats now poll every 15s instead of
single fire-and-forget fetch. Failed MB type counts cached on frontend,
only re-fetched after mutations.
Also includes: library reorganize now moves cover.jpg via post-pass
sidecar sweep, and changelog updates.