Track is the app's normalized song model and QueueItemRef its thin queue
identity -- consumed app-wide (queue, cover, context menus, sharing, lucky-mix,
library browse), not a playback-internal detail. They lived in
features/playback/store/playerStoreTypes, forcing ~115 core/feature files to
reach into the playback feature for the central media type.
Move the two interfaces to lib/media/trackTypes; playerStoreTypes keeps
PlayerState and now imports them from lib. 115 importers repointed (mixed
'PlayerState, Track' lines split so PlayerState stays). Pure type move (erased at
runtime). tsc 0, lint 0.
utils/library is the local-index query/browse/sync engine -- feature-free shared
infra consumed by the album, search, genre, artist and offline features. With
its last feature edges removed (queue resolver, shuffleArray, albumBrowseCatalogChunk,
genreBrowsePlayback all relocated earlier this branch), the whole directory is
pure infra and belongs under lib/.
Whole-directory move (58 files, 76 consumers rewritten) via resolver-based
rewrite: cross-cluster relatives absolutized to @/, intra-cluster siblings kept
relative. utils/library is gone; lib/library imports zero @/features. Three
stale doc comments in the album/search/artist barrels repointed.
tsc 0, lint 0, full suite 2353/2353, production build OK.
Relocate the playback/queue/transport/audio-output engine out of the type-first
store/ + utils/playback/ + utils/audio/ dirs into a cohesive src/features/playback/,
structure-preserving:
store/<x> -> features/playback/store/<x>
store/audioListenerSetup/<x> -> features/playback/store/audioListenerSetup/<x>
utils/playback/<x> -> features/playback/utils/playback/<x>
utils/audio/<x> -> features/playback/utils/audio/<x>
184 files moved (107 source + 77 tests), 365 consumers rewritten. Pure move — no
behavior change, no state-split (the playerStore state-split stays a separate M5
question). Enabled by this session's decouple seams (artist/offline/orbit/auth →
core registries), so the engine carries no inbound core->feature inversion: store/
now holds only the 50 cross-cutting global stores (auth family, the seams, library
index, UI/settings stores).
KEPT OUT of the move (would re-create global->engine edges): the 3 pure config
helpers utils/audio/{loudnessPreAnalysisSlider,hiResCrossfadeResample} +
utils/playback/autodjOverlapCap (authStore + settings UI read them — they stay in
utils/). Ambiguous view-state stores (eqStore, queueToolbarStore,
playerBarLayoutStore) stay global (no engine imports).
Consumers use DEEP paths (@/features/playback/...), no barrel — matches the lib/
approach and avoids barrel-mock-collapse across the 140 usePlayerStore consumers.
Two tolerated type-only core->feature edges remain (localPlaybackStore->QueueItemRef,
localPlaybackMigration->HotCacheEntry, both erased).
tsc 0, lint 0, full suite 319/2353 green, iron-rule clean (no runtime store->feature
import). Behavior-touching only via the prerequisite bridge seam (already QA-flagged);
the move itself is pure.
Pull findLocalPlaybackUrl/findLocalPlaybackEntry/hasLocalPersistentPlaybackBytes
+ the entry/index-key membership helpers (entryBelongsToServer,
indexKeyBelongsToServer, findFavoriteAutoEntry, hasLocal{Library,FavoriteAuto}Bytes)
out of features/offline/utils/offlineLibraryHelpers into a new core module
store/localPlaybackResolve.ts. The substrate depends only on authStore +
localPlaybackStore + serverIndexKey utils (no useOfflineStore), so the audio
core can resolve on-disk bytes without inverting into @/features/offline.
Repointed the audio-core consumers (crossfadePreload, playbackUrlRouting,
resolvePlaybackUrl, playTrackAction, promoteStreamCache, hotCachePrefetch,
hotCacheStore) + offline-internal callers + favorites hook; moved the two
barrel vi.mocks onto the new leaf module. offlineLibraryHelpers re-imports the
two primitives it still needs internally.
Decouple Step 2a. Removes the local-bytes offline edge from the audio core;
the resolve* media-resolution family (Step 2b) + orbit seam (Step 3) remain.
tsc 0, lint 0, full suite 319/2353 green.
Move the Subsonic + Navidrome protocol clients and the library IPC facade
(subsonic*, navidrome*, library.ts + tests) from src/api/ into src/lib/api/,
the feature-free infra layer (plan M4, decision §10.3: shared client core → lib/).
Pure move: deep-path import specifiers @/api/* -> @/lib/api/* across ~150
consumers; no behaviour change. Domain REST (lyrics/events) and cover/analysis
infra stay in src/api/ pending their own M4 placement.
tsc 0, lint 0/0, full suite 319 files / 2353 tests green.
Psychotoxical