- Artist grid and detail header now show romaji names when toggle is on.
Builds a Map<artistId, artistRomaji> from the existing song romaji index
so no extra API call is needed.
- Apple Music autofill button added to edit modal next to MusicBrainz.
Reuses the existing lookupItunesTrackMeta backend function via a new
GET /api/itunes/lookup endpoint — fills album, year, genre, track#,
and cover art.
- Romaji index is invalidated after every successful download so newly
added songs appear with correct sort tags without requiring a page reload.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>