Audit v3 §2 + §4.5: HomeRepository's hydrateAlbums / hydrateArtists /
hydrateTracks use mapNotNull on the per-entity DAO, so any ID in
/api/home/index that the local cache hasn't seen gets silently
dropped from the emitted list. Combined with HomeSuccessContent
hiding empty sections, the user sees the home view missing entire
rows — Rediscover is the worst hit because by definition those are
albums you HAVEN'T played recently, least likely to be in cache.
User reported on emulator: 'we're missing a lot of rows and
formatting from the home view, the rediscover section is completely
missing and a number of the shown sections are rendered with a
different number of rows than the flutter app has.'
Fix: after refreshIndex() pulls the section ID lists, fire-and-forget
a hydration pass on the app scope. For each section, find IDs the
cache doesn't have, fetch via LibraryRepository's existing per-entity
endpoints (refreshAlbumDetail / refreshArtistDetail / refreshTrack —
the last already commented 'for the hydration queue'), chunked
HYDRATE_CONCURRENCY=4 wide so we don't fire 50 parallel requests.
runCatching per-call so one broken ID doesn't fail the batch.
This is the slim version of audit #24 MetadataPrefetcher scoped to
Home — the full background hydration queue with tile-providers is
still pending.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
bvandeusen
040217cab6