Replaces the single 5GB capBytes with independent Liked + Rolling
budgets (5GB each default). Bucket = liked-ness, NOT CacheSource:
a cached track currently in the liked set is charged to / evicted
under Liked; everything else is Rolling. Storage-only dedup — it
never filters playback (S4's offline lists query the whole index).
- db.dart: schema 8→9, AudioCacheIndex.lastPlayedAt (real play
recency for S4 + rolling LRU; migration backfills to cachedAt).
drift codegen run.
- cache_settings: likedCapBytes + rollingCapBytes (+ setters); old
cache_cap_bytes key dropped, defaults reapply (not data loss).
- audio_cache_manager: touch(); bucketUsage() counts orphan
partials (LockCaching files never indexed) as Rolling so the cap
truly bounds disk; evictBuckets() drains non-liked LRU then
sweeps orphans, Liked only by its own (large) cap — normal use
never evicts the user's liked library.
- prefetcher → evictBuckets with the cached liked set.
- storage_section: two cap selectors + per-bucket usage (folds in
S3 to avoid a broken intermediate).
- Explicit Download dropped: removed album + playlist Download
buttons, autoPlaylist pins, now-unused imports.
- Tests updated/compiled (drift-cohort tests are CI-skipped).
High blast radius (eviction deletes files) — liked-protective by
design; needs operator device-check before "done".
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
bvandeusen
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