feat(offline): unify local playback, offline library, and favorites sync (#1008)

* feat(local-playback): LP-1 media layout and download_track_local

Add library-index-backed path builder in psysonic-core and a unified
Tauri download command that writes under media/{cache|library}/ with
layout fingerprints; legacy hot/offline commands unchanged for now.

* feat(local-playback): LP-2 localPlaybackStore and media tier Rust helpers

Add unified Zustand index with legacy offline/hot-cache import, media_layout
TS mirror, and Rust commands for tier size/purge/delete/promote.

* feat(local-playback): LP-3 wire prefetch and playback to unified index

Route downloads through download_track_local, delegate hot/offline shims
to localPlaybackStore, and update resolve/promote/prefetch plus key rewrite.

* feat(local-playback): LP-4–LP-6 offline UI, invalidation, and mediaDir

Offline Library loads pinned groups via library index; sync-idle invalidates
stale paths; Settings uses a single mediaDir with cache/library tier sizes.

* feat(local-playback): migrate legacy offline files to media/library layout

Move flat psysonic-offline downloads into nested media/library paths using
library index metadata, with retry on sync-idle when tracks are not yet indexed.

* feat(local-playback): simplify offline disk migration and restore Offline Library UI

Scan psysonic-offline on disk and relocate by library track id; restore pinSource
and cover art for migrated pins; add find_live_by_id for segment/key resolution.

* feat(local-playback): disk-first offline reconcile and fast library tier discovery

Reconcile library-tier index against on-disk files using candidate track IDs
instead of scanning the full catalog. Refresh Offline Library from disk on
open and focus so deleted folders drop out of the UI. Add Rust discover/prune
helpers and wire album/server reconcile through the unified path.

* fix(offline): resolve local playback URLs across server index-key variants

Offline Library play failed when library-tier files were indexed under a
host key while playback looked up only the active profile UUID. Use
findLocalPlaybackEntry for URL resolution, pin queueServerId to the card
server, and build play queues from tracks that still have on-disk bytes.

* fix(offline): playlist cards, playback from Offline Library, and local URL routing

Show playlists with name and quad/custom cover instead of the first track's
album artist. Build play queues with library-batch fallback and offline-only
server switch. Prefer library-tier URLs in playTrack; add playback-unavailable
toast and missing trackToSong import.

* fix(cache): ephemeral disk reconcile, empty-dir prune, and Storage UI

Sweep media/cache after eviction (orphan files, stale index, empty folders).
Settings: split media folder from cover cache; in-browser image cache lives
under Cover art cache with aligned columns; clear only IndexedDB images.

* feat(offline): show library disk usage in Offline Library header

Query media/library tier size on reconcile and display it in a right-aligned
stat block beside the page title and album count.

* fix(cache): defer unindexed hot-cache eviction; drop legacy offline size cap

Reconcile ephemeral cache without deleting files from other app instances;
evict unindexed hot-cache files oldest-first only when over hotCacheMaxMb.
Remove the hidden maxCacheMb gate and offline-full banner on album pages.

* feat(offline): play-all cache card and stable Offline Library grid rows

Add a shuffle-and-play card for all on-disk library pins plus hot-cache
tracks when buffering is enabled. Fix virtual row height for offline cards
and reserve the year line so grid rows no longer overlap.

* feat(offline): queue-cache grid card limited to media/cache

Replace the full-width play-all banner with a playlist-style grid tile.
Shuffle/enqueue only ephemeral hot-cache tracks when buffering is enabled,
not offline library pins.

* chore(licenses): regenerate bundled OSS list for 1.48.0-dev

Set GPL-3.0-or-later on workspace crates and extend cargo-about accepted
licenses so generate-licenses.mjs runs; refresh src/data/licenses.json.

* feat(favorites): auto-sync starred tracks into separate media/favorites tier

Keep manual Offline Library in media/library/ and favorites offline in
favorite-auto/index + media/favorites/ so toggling sync cannot purge
user-pinned bytes; playback resolves library before favorites.

* feat(favorites): compact offline toggle with disk icon and sync semaphore

Move control to the page header (disk + switch, tooltips); show red/yellow/green
LED when enabled instead of the full-width save-offline card.

* fix(favorites): trigger offline sync on star/unstar from anywhere

Hook star/unstar API so favorites offline reconcile runs globally (songs,
albums, artists); optimistic unstar removes local bytes; drop Favorites-page-only sync.

* fix(cache): skip hot-cache prefetch when favorites or library bytes exist

Treat favorite-auto tier like offline library for prefetch, stream promote,
and same-track replay so synced favorites are not duplicated in media/cache.

* fix(favorites): reconcile offline files on merged track union only

Dedupe artist/album/song stars into one target set per track id; drop eager
unstar deletes so overlapping favorites do not remove bytes still needed.

* feat(offline): add Favorites card to Offline Library

Mirror queue-cache card for favorite-auto tier with play, enqueue, and
navigation to Favorites on card click.

* feat(offline): show library+favorites disk total with icon breakdown

Sum media/library and media/favorites in the On disk widget and open an
icon popover on hover with per-tier sizes for screen readers and sighted users.

* feat(favorites): enable offline Favorites tab when auto-save is on

Keep Favorites in the sidebar when disconnected, land on /favorites without
manual pins, and load starred rows from the local library index.

* feat(favorites): cross-server offline browse with per-server covers

When auto-save is on, Favorites merges starred items from every indexed
server and syncs each server independently. Detail links carry ?server=
for offline album/artist pages; cover art resolves disk cache by entity
serverId instead of the active server only.

* feat(playback): mixed-server queue scope and cross-server favorites sync

Per-ref server identity for playback (URL index key in queue refs, profile
UUID for API): trackServerScope, playbackServer helpers, gapless/scrobble/covers
by playing ref. Remove cross-server enqueue block; remap queueItems on URL
remigration.

Favorites: star/unstar and favorite-auto sync target the owning serverId
(not only active); queueSongStar passes server through pending sync.

* fix(offline): suppress Subsonic calls during favorites and local playback

Add reachability guards so offline favorites browse, album detail, queue
sync, scrobble, and Now Playing metadata skip network when the server is
down or the track plays from psysonic-local. Load starred albums/tracks
from the library index only (not the full artist table), refresh favorites
from index first, and pass server scope in favorites navigation.

* fix(queue): export share and playlist save for active server only

Mixed-server queues now filter queue refs by the browsed server profile
before copying a share link or saving/updating a playlist from the toolbar.

* fix(offline): complete album pins and resume interrupted downloads

Prefer full getAlbum track lists when online so partial library index
does not truncate offline pins; refresh songs before pin from album
detail. Resume incomplete persisted pins after reconcile and reconnect,
cancel in-flight work on delete, and chunk library batch fetches past
100 refs.

* fix(offline): pin queue, queued UI, and re-pin after remove

Serialize album and playlist offline pins so parallel enqueue no longer
drops in-flight work. Show an explicit queued state on album and playlist
actions with dequeue on repeat click, sidebar tooltips for long labels,
and clear stale cancel flags so Make available offline works after remove.

* fix(offline): remove Offline Library cards without full page reload

Optimistically drop the deleted card from local grid state, show the
loading spinner only on first visit, and ignore stale disk refreshes so
pin updates no longer flash the whole library view.

* fix(offline): artist discography pin state and queue handling

Detect cached/queued/downloading from persisted album pins instead of
ephemeral bulkProgress, skip already offline or in-flight albums when
enqueueing discography, and show the correct hero button after revisit.

* fix(local-playback): address LP-1 review handoff (B1, M1–M7)

Harden media path sanitization and tier containment, align Rust/TS layout
fingerprints, serialize per-track downloads, and fix favorites re-enable,
multi-server debounce, prev-track promote key, now-playing reachability,
and ephemeral prefetch soft-skip for unindexed tracks.

* fix(offline): cancel in-flight favorites downloads on unstar

Abort Rust streams with the real favorites downloadId when sync is
rescheduled or disabled, and drop completed bytes that no longer belong
in the starred set so unstar does not leave orphan files on disk.

* fix(build): resolve TypeScript errors blocking prod nix build

Align mediaLayout with LibraryTrackDto camelCase, extend analysis-sync
reasons, fix OfflineLibrary grid cover typing, and tighten vitest mocks
so `tsc && vite build` passes under the flake beforeBuildCommand.

* fix(rust): satisfy clippy too_many_arguments for CI

Bundle offline-library analysis and local path/migration helpers into
parameter structs so `cargo clippy -D warnings` passes on the branch.

* fix(settings): show correct hot-cache track count in Buffering section

Count ephemeral localPlayback rows instead of prefix-matching index keys,
which always missed host:port server segments and showed zero tracks.

* fix(media-layout): align truncation threshold on code points (M1)

Rust sanitize_and_truncate_segment now uses char count like TS so long
non-ASCII metadata does not diverge layout fingerprints; add Cyrillic
parity tests and clarify ephemeral cold-miss doc on download_track_local.

* fix(test): use numeric cachedAt in hotCacheStore count test

Align test fixture with LocalPlaybackEntry type so tsc passes in CI.

* docs: add CHANGELOG and credits for offline experience PR #1008

* feat(offline): auto-sync manually cached playlists when track list changes

Re-download new tracks and prune removed ones for playlist pins only, triggered
from updatePlaylist, playlist detail load, smart-playlist polling, and reconnect.

* docs: note cached-playlist sync in CHANGELOG and credits for PR #1008

* fix(offline): exclude smart playlists from manual offline cache and sync

Hide cache-offline for psy-smart-* playlists, block download/sync paths, and
document the distinction in CHANGELOG.

* feat(offline): auto-sync cached albums and artist discographies

Generalize pinned playlist reconcile into pinnedOfflineSync so manually
pinned albums and artist discographies re-download added tracks and prune
removed ones on reopen, reconnect, and catalog changes.

* feat(offline): split pinned sync triggers by pin kind

Album and artist pins reconcile after library index sync and reconnect;
regular playlists reconcile hourly and on in-app playlist edits only.
Remove reconcile-on-open for album, artist, and playlist detail views.

* fix(offline): address PR #1008 review (N1, tests, pin queue)

Scope playlist reconcile to the owning server via getPlaylistForServer.
Add artist discography and mixed-server playlist tests; dedupe pending
sync jobs; skip pinTasks overwrite during active downloads.

CHANGELOG.md

@@ -40,6 +40,20 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 
 
+### Offline — unified local playback, library index join, and favorites sync
+
+**By [@cucadmuh](https://github.com/cucadmuh), PR [#1008](https://github.com/Psychotoxical/psysonic/pull/1008)**
+
+* All local audio bytes live under one **`media/`** tree: `cache/` (ephemeral hot-cache), `library/` (user-pinned offline), and `favorites/` (auto-synced stars). Paths use library-index metadata and the URL-derived server index key so two profiles on the same server share one bucket.
+* **`localPlaybackStore`** replaces the split hot-cache / offline metadata stores — one index drives prefetch, promotion, eviction, and `psysonic-local://` playback resolution.
+* **Offline Library** lists pinned and favorites-tier tracks by joining that index with the SQLite library catalog (no duplicate offline album cards). Pin album, playlist, or artist from browse; disk usage shown in the Offline Library header.
+* **Favorites auto-sync** keeps starred tracks on disk in `media/favorites/` with a compact toggle, cross-server reconcile, and cancel-on-unstar so orphaned files are not left behind.
+* **Cached offline pins stay in sync** — manually pinned **albums** and **artist discographies** reconcile after a library index sync (delta/full); **regular playlists** reconcile hourly and when edited in-app. Added tracks download and removed ones are pruned. **Smart playlists** (`psy-smart-…`) are excluded — their contents refresh from server rules automatically.
+* Mixed-server queues play offline with correct per-track server scope; network guards skip Subsonic when local bytes exist.
+* Startup migration from legacy `psysonic-offline/` layout; Settings → Storage uses a single **media directory** picker and a live hot-cache track count.
+
+
+
 ## Changed
 
 ### Dependencies — npm and Rust refresh