Commit Graph
113 Commits
Author SHA1 Message Date
zarzet ed020c9303 feat: native M4A ReplayGain tag writing and SAF picker error handling 2026-04-13 23:35:03 +07:00
zarzet 071db2f109 refactor: move deezer search flow to extension 2026-04-13 23:35:02 +07:00
zarzet 7637aaf168 fix: fallback extra metadata genre 2026-04-13 23:35:02 +07:00
zarzet 917ba842f5 fix: align metadata sanitization and lyrics editing 2026-04-13 23:32:19 +07:00
zarzet 6845ebe04c refactor: move deezer to extension 2026-04-13 23:32:18 +07:00
zarzet 67833424cc fix: align re-enrich matching with autofill metadata 2026-04-13 23:32:18 +07:00
zarzet 5e17c9f238 feat: add configurable extension download fallback 2026-04-13 23:32:18 +07:00
zarzet 4c4553913f fix: harden gomobile extension bindings and m4a cover retention 2026-04-13 23:32:17 +07:00
zarzet ce4be0ba97 feat: enrich composer and track totals metadata 2026-04-13 23:32:17 +07:00
zarzet 89603af1f1 chore: remove redundant comments and update donor list 2026-04-13 23:32:15 +07:00
zarzet 0e265193b8 fix: improve extension runtime safety, HTTP response URL, SongLink parsing, and recommended service for extensions
- Add 'url' field (final URL after redirects) to all extension HTTP responses and fix fetch polyfill to return final URL instead of original request URL
- Fix RunWithTimeout race condition: increase force-timeout from 1s to 60s to prevent concurrent VM access crashes, add nil guards
- Use lockReadyVM() for thread-safe VM access in GetPlaylistWithExtensionJSON and InvokeAction
- Handle mixed JSON types (string, null, array) in SongLink resolve API SongUrls field
- Fix recommended download service not showing for extension-based searches in download picker
2026-04-13 23:32:15 +07:00
zarzet f37e4704a6 feat: add ReplayGain scanning, APEv2 tag support, and fix metadata bugs
ReplayGain (track + album):
- Scan track loudness via FFmpeg ebur128 filter (-18 LUFS reference)
- Duration-weighted power-mean for album gain computation
- Support for FLAC (native Vorbis), MP3 (ID3v2 TXXX), Opus, M4A
- Album RG auto-finalizes when all album tracks complete
- Retryable gate: blocks finalization while failed/skipped items exist
- SAF support: lossy album RG writes via temp file + writeTempToSaf
- New embedReplayGain setting (off by default) with UI toggle

APEv2 tag support:
- Full APEv2 reader/writer with header+items+footer format
- Merge-based editing with override keys for explicit deletions
- Binary cover art embedding (Cover Art (Front) item)
- Library scanner support for .ape/.wv/.mpc files
- ReplayGain fields in APE read/write/edit pipeline

Bug fixes (26):
- setArtistComments wiping fields on empty string value
- APEv2 rewrite corrupting files with ID3v1 trailer
- APE edit replacing entire tag instead of merging
- ReplayGain lost on manual MP3/Opus/M4A metadata edit
- Editor metadata save losing custom tags (preserveMetadata)
- Album RG accumulator not cleaned on queue mutation
- Album gain using unweighted mean instead of power-mean
- writeAlbumReplayGainTags return value silently ignored
- SAF album RG writing to deleted temp path
- Cancelled tracks polluting album gain computation
- APE ReplayGain not wired end-to-end
- APE field deletion not working in merge
- APE cover edit was a no-op
- Album RG duplicate entries on retry
- APE apeKeysFromFields missing track/disc/lyrics mappings
- Album RG entries purged by removeItem before computation
- FFmpeg converters discarding empty metadata values
- _appendVorbisArtistEntries skipping empty value (null vs empty)
- Album RG write-back fails for SAF lossy files
- Album RG partial finalization on failed tracks
- FLAC ClearEmpty flag destroying tags on partial callers
- clearCompleted not retriggering album RG checks
- ReadFileMetadata MP3/Ogg missing label and copyright
- Cover embed on CUE split destroying split artist tags
- Album RG gain format inconsistent (missing + prefix)
- FLAC reader/editor missing tag aliases (ALBUMARTIST, LABEL, etc.)
- dart:math log shadowed by logger.dart export
2026-04-13 23:32:14 +07:00
zarzet d034144e9c feat: add resolve API with SongLink fallback, fix multi-artist tags (#288), and cleanup
Resolve API (api.zarz.moe):
- Refactor songlink.go: Spotify URLs use resolve API, non-Spotify uses SongLink API
- Add SongLink fallback when resolve API fails for Spotify (two-layer resilience)
- Remove dead code: page parser, XOR-obfuscated keys, legacy helpers

Multi-artist tag fix (#288):
- Add RewriteSplitArtistTags() in Go to rewrite ARTIST/ALBUMARTIST as split Vorbis comments
- Wire method channel handler in Android (MainActivity.kt) and iOS (AppDelegate.swift)
- Add PlatformBridge.rewriteSplitArtistTags() in Dart
- Call native FLAC rewriter after FFmpeg embed when split_vorbis mode is active
- Extract deezerTrackArtistDisplay() helper to use Contributors in album/playlist tracks

Code cleanup:
- Remove unused imports, dead code, and redundant comments across Go and Dart
- Fix build: remove stale getQobuzDebugKey() reference in deezer_download.go
2026-04-13 23:32:14 +07:00
zarzet bfb0cad603 feat: add field selection dialog for bulk re-enrich metadata
Add a bottom sheet dialog that lets users choose which metadata field
groups to update during bulk re-enrich (cover, lyrics, album/album
artist, track/disc number, date/ISRC, genre/label/copyright).

Backend (Go):
- Filter FLAC Metadata struct and FFmpeg metadata map by selected
  update_fields so non-selected groups preserve existing file values
- Guard Deezer extended metadata fetch with shouldUpdateField(extra)
- Title/Artist are never overwritten by re-enrich (search keys only)
- enrichedMeta response only includes selected field groups

Frontend (Dart):
- New re_enrich_field_dialog.dart bottom sheet with checkboxes
- FFmpegService embed methods gain preserveMetadata param that uses
  -map_metadata 0 instead of -1 to preserve non-selected tags
- Hide selection overlay/bar before showing dialog, restore on cancel
- Fix setState-after-dispose guard in cancel branches

Cleanup:
- Remove dead code in library_tracks_folder_screen.dart
- Fix use_build_context_synchronously in main_shell.dart
- Suppress false-positive use_null_aware_elements lints
- Update l10n label from 'Title, Artist, Album' to 'Album, Album Artist'
2026-04-13 23:32:13 +07:00
zarzet cc10a917dc fix: prefer local file for cover/lyrics save and update build dependencies
- Cover art: extract from downloaded file first, fall back to URL download
- Lyrics: check embedded lyrics/sidecar LRC before fetching online
- Add audioFilePath param to FetchAndSaveLyrics (Go, Kotlin, Swift, Dart)
- Handle SAF content:// URIs for lyrics extraction in Kotlin bridge
- Update Go 1.25.7 -> 1.25.8, Gradle 9.3.1 -> 9.4.1, Kotlin 2.2.21 -> 2.3.20
- Update NDK r27d -> r28b, Flutter FVM 3.41.4 -> 3.41.5
- Upgrade all Flutter and Go module dependencies to latest
2026-04-13 23:32:13 +07:00
zarzet 120ecaa0e5 feat: add artist tag mode setting with split Vorbis support and improve library scan progress
- Add artist_tag_mode setting (joined / split_vorbis) for FLAC/Opus multi-artist tags
- Split 'Artist A, Artist B' into separate ARTIST= Vorbis comments when split mode is enabled
- Join repeated ARTIST/ALBUMARTIST Vorbis comments when reading metadata
- Propagate artistTagMode through download pipeline, re-enrich, and metadata editor
- Improve library scan progress: separate polling intervals, finalizing state, indeterminate progress
- Add initial progress snapshot on library scan stream connect
- Use req.ArtistName consistently for Qobuz downloads instead of track.Performer.Name
- Add l10n keys for artist tag mode, library files unit, and scan finalizing status
2026-04-13 23:32:12 +07:00
zarzet fd3a34303e feat: add stable cover cache keys, Qobuz album-search fallback, metadata filters and extended sort options
- Introduce coverCacheKey parameter through Go backend and Kotlin bridge for stable SAF cover caching
- Add MetadataFromFilename flag to skip filename-only metadata and retry via temp-file copy
- Add Qobuz album-search fallback between API search and store scraping
- Extract buildReEnrichFFmpegMetadata to skip empty metadata fields
- Add metadata completeness filter (complete, missing year/genre/album artist)
- Add sort modes: artist, album, release date, genre (asc/desc)
- Prune stale library cover cache files after full scan
- Skip empty values and zero track/disc numbers in FFmpeg metadata
- Add new l10n keys for metadata filter and sort options
2026-04-13 23:32:12 +07:00
zarzet a2458c1292 refactor: extract and improve ReEnrich track selection with scoring-based matching 2026-04-13 23:32:11 +07:00
zarzet b712b9f509 refactor: route spotify URLs through extensions 2026-04-13 23:32:11 +07:00
zarzet f7c0e417d7 refactor: unexport extension store types and methods (package-internal only) 2026-03-27 04:50:40 +07:00
zarzet 79a69f8f70 chore: clean up codebase 2026-03-26 16:43:56 +07:00
zarzet bf0f4bdf3e fix: store URL input flash on startup and FLAC metadata fallback for mismatched files
Load saved registry URL before first state update to prevent brief
flash of the setup screen when the store tab initializes.

Add Ogg/Opus fallback in readFileMetadata when FLAC parsing fails,
handling files saved with .flac extension that contain opus data.
2026-03-26 16:26:14 +07:00
zarzet 5e1cc3ecb5 refactor: extract YouTube download to ytmusic extension and fix UI issues
Remove built-in YouTube/Cobalt download pipeline from Go backend and
Dart frontend. YouTube downloading now requires the ytmusic-spotiflac
extension (with download_provider capability).

Go backend:
- Delete youtube.go (745 lines) and youtube_quality_test.go
- Remove DownloadFromYouTube, IsYouTubeURLExport,
  ExtractYouTubeVideoIDExport from exports.go
- Remove YouTube routing from DownloadTrack and DownloadByStrategy

Dart frontend:
- Remove YouTube from built-in services, bitrate settings, quality UI
- Remove youtubeOpusBitrate/youtubeMp3Bitrate from settings model
- Add migration 7: default service youtube -> tidal
- Remove YouTube l10n keys from all 14 arb files and regenerate
- Update _determineOutputExt to handle opus_/mp3_ quality strings
- Add SAF opus/mp3 metadata embedding in unified branch
- Fix TweenSequence assertion crash (t outside 0.0-1.0)
- Fix store URL TextField styling consistency

Extension changes (gitignored, in extension/YT-Music-SpotiFLAC/):
- Add download_provider type, qualityOptions, network permissions
- Implement checkAvailability and download via SpotubeDL/Cobalt
2026-03-26 16:17:57 +07:00
zarzet 66d714d368 fix: unify search bar, filter chips, tab navigation, and clean up comments 2026-03-25 22:27:22 +07:00
zarzet 49c2501fbc refactor: use pointer returns and unified forceRefresh in ExtensionStore 2026-03-25 21:47:31 +07:00
zarzet 03fd734048 perf: lazy extension VM init, incremental startup maintenance, and UI optimizations
- Defer extension VM initialization until first use with lockReadyVM() pattern to eliminate TOCTOU races and reduce startup overhead
- Add validateExtensionLoad() to catch JS errors at install time without keeping VM alive
- Teardown VM on extension disable to free resources; re-init lazily on re-enable
- Replace full orphan cleanup with incremental cursor-based pagination across launches
- Batch DB writes (upsertBatch, replaceAll) with transactions for atomicity
- Parse JSON natively on Kotlin side to avoid double-serialization over MethodChannel
- Add identity-based memoization caches for unified items and path match keys in queue tab
- Use ValueListenableBuilder for targeted embedded cover refreshes instead of full setState
- Extract shared widgets (_buildAlbumGridItemCore, _buildFilterButton, _navigateWithUnfocus)
- Use libraryCollectionsProvider selector and MediaQuery.paddingOf for fewer rebuilds
- Simplify supporter chip tiers and localize remaining hardcoded strings
2026-03-25 19:55:02 +07:00
zarzet 3a73aee1b7 feat: add home feed provider setting, fix Qobuz cover URL propagation
- Add homeFeedProvider field to AppSettings with picker UI in extensions page
- Update explore_provider to respect user's home feed provider preference
- Add normalizeCoverReference() and normalizeRemoteHttpUrl() to filter
  invalid cover URLs (no scheme, no host, protocol-relative)
- Apply cover URL normalization across all screens and providers to
  prevent 'no host specified in URI' errors from Qobuz
- Propagate CoverURL from QobuzDownloadResult through Go backend so
  cover art is available even when request metadata is incomplete
2026-03-25 15:46:22 +07:00
zarzet 4f365ca7fe feat: add built-in Tidal/Qobuz search with recommended service picker
- Add SearchAll() for Tidal and Qobuz in Go backend (tracks, artists, albums)
- Add searchTidalAll/searchQobuzAll platform routing for Android and iOS
- Add Tidal/Qobuz options to search provider dropdown in home tab
- Show (Recommended) label and auto-select service in download picker
2026-03-25 13:52:57 +07:00
zarzet 4cf885a52e feat: populate M4A metadata in ReadFileMetadata and library scan
ReadFileMetadata now fills all tag fields (title, artist, album, ISRC,
lyrics, genre, label, copyright, composer, comment, track/disc number)
for M4A files using the new ReadM4ATags helper, matching the existing
behavior for FLAC, MP3, and Ogg.

scanM4AFile reads tags via ReadM4ATags instead of falling back to the
filename, and applies applyDefaultLibraryMetadata for missing fields
(consistent with FLAC/MP3 scan path).

Remove the '&& ext != ".m4a"' guard in cover cache so M4A cover art
is extracted and cached during library scans.
2026-03-22 23:00:55 +07:00
zarzet 859b823e77 fix: extract cover art from M4A/ALAC files for conversion
Add extractCoverFromM4A() that reads the covr atom from the MP4
box tree (moov/udta/meta/ilst/covr/data). Wire it into
ExtractCoverToFile so ALAC-to-FLAC conversion preserves cover art.
2026-03-16 02:49:48 +07:00
zarzet 35f2f119db feat: improve auto-fill track resolution in Edit Metadata sheet
- Identifier-first resolution (ISRC/Deezer/Spotify) before falling back to text search
- Score-based match selection via _metadataMatchScore instead of provider order
- Pass sourceTrackId from TrackMetadataScreen into _EditMetadataSheet
- Refactor buildDeezerExtendedMetadataResult and buildDeezerISRCSearchResult as testable helpers
- Add unit tests for buildDeezerExtendedMetadataResult and buildDeezerISRCSearchResult
- Propagate copyright through Deezer enrichment chain (exports, extension_providers)
2026-03-15 21:12:47 +07:00
zarzet 7b9ed3ec8e feat: add Qobuz Afkar API provider and prefer request metadata for consistent album grouping 2026-03-15 18:52:41 +07:00
zarzet 134bf4375f feat: auto-enrich metadata for extension downloads, fix artist/playlist parsing, and improve metadata screen
- Add metadata provider search (Deezer/Tidal/Qobuz) in download pipeline for extension tracks with missing album/date/ISRC, using the same mechanism as ReEnrichFile
- Always pass enriched metadata (album, release_date, ISRC, cover_url, track/disc number) back in DownloadResponse so Flutter can embed them
- Add Deezer ISRC lookup for genre/label during download enrichment
- Extend _buildTrackForMetadataEmbedding to use ISRC, cover_url, album_artist from backend response
- Add Releases section support in artist page (Go + Flutter)
- Fix Track ID parsing to prefer non-empty native ID over empty spotify_id
- Paginate popular tracks (5 per page with swipe + dot indicators)
- Fix metadata screen: duration getter checks _editedMetadata, read album/duration from file tags
- Make metadata screen ID labels and Open-in buttons source-aware (Amazon/Tidal/Qobuz/Deezer/Spotify)
- Copy enrichment fields (AlbumName, DurationMS, CoverURL, AlbumArtist, ID) back to download request
- Update README badge, add network_requests.txt to gitignore
2026-03-14 21:47:57 +07:00
zarzet aa9854fc0a perf: optimize polling, progress caching, staggered warmup, and snapshot-based library scan
- Reduce polling interval from 800ms to 1200ms across download progress, library scan, and Android native stream
- Add dirty-flag caching to Go GetMultiProgress() to skip redundant JSON marshaling
- Replace eager provider initialization with staggered Timer-based warmup (400/900/1600ms)
- Add snapshot-based incremental library scan to avoid large MethodChannel payloads
- Move history stats and grouped album filtering to Riverpod providers for better cache invalidation
- Cap home tab history preview to 48 items with deep equality wrapper to reduce rebuilds
- Throttle foreground service notification updates to 2% progress buckets
- Migrate PageView to PageView.builder with AutomaticKeepAliveClientMixin
- Add comparison table to README
2026-03-14 16:52:33 +07:00
zarzet 10bc29e347 feat: add Qobuz and Tidal as built-in metadata search providers with priority-based unified search 2026-03-14 16:07:41 +07:00
zarzet ac9141f167 feat: add Qobuz and Tidal metadata API, URL parsers, and full store support 2026-03-14 15:09:48 +07:00
zarzet 34d22f783c feat: add store registry URL management, port iOS handlers, and clean up store UI
Add set/get/clear store registry URL method channel handlers on Android,
iOS, and Go backend so users can configure a custom extension repository.

Store tab now shows a setup screen when no registry URL is configured,
with a cleaner layout (removed redundant description and helper text)
and visible TextField borders for dark theme.

Minor comment and formatting cleanups across several files.
2026-03-14 13:24:30 +07:00
zarzet f1eef47600 refactor: optimize SAF metadata reading, CUE sibling resolution, and startup initialization
- Add fast-path SAF metadata reading via /proc/self/fd with displayNameHint support, falling back to temp copy
- Replace repeated findFile() CUE audio sibling lookups with cached case-insensitive directory listing
- Cache parsed CUE sheets to avoid redundant parsing during library scans
- Optimize incremental scan CUE modTime lookup from O(N*M) to O(N+M)
- Defer local library provider loading until localLibraryEnabled setting is true
- Replace O(n) track+artist history lookup with O(1) map-based lookup
- Delay startup maintenance tasks by 2s to reduce launch-time contention
2026-03-12 03:36:48 +07:00
zarzet c2736a61fb refactor: remove built-in Spotify API provider, use Deezer as sole default
- Remove all Spotify credential management (client ID/secret, secure storage)
- Remove Spotify platform channel handlers from MainActivity
- Remove exported Go functions: GetSpotifyMetadata, SearchSpotify,
  SearchSpotifyAll, GetSpotifyRelatedArtists, SetSpotifyAPICredentials
- Simplify GetSpotifyMetadataWithDeezerFallback to SpotFetch-only path
- Remove Spotify built-in fallback in ReEnrichFile search pipeline
- Always return false from HasSpotifyCredentials; getCredentials always errors
- Default metadataProviderPriority is now ['deezer'] only
- Sanitize provider priority list to strip 'spotify' entries on load/save
- Add migration v5 to clear saved Spotify credentials from existing installs
- Remove Spotify source chip and credentials UI from options settings page
- Remove metadataSource param from search() — always uses Deezer
- spotify-web extension remains supported via the extension provider system
2026-03-11 00:58:07 +07:00
zarzet 76fe8dbc69 feat: add CUE sheet support for local library scanning and splitting (#201)
Parse .cue files in library scanner (Go + SAF) to display individual
tracks instead of one large audio file. Add FFmpeg-based CUE splitting
to extract tracks into separate FLAC files with embedded metadata and
cover art.

- Go: CUE parser, two-pass scan (CUE first, skip referenced audio),
  virtual paths (cue#trackNN) for DB UNIQUE constraint, audioDir
  override for SAF temp-file scenarios
- Android: SAF scanner recognizes .cue in both full and incremental
  scan, copies .cue+audio to temp for Go parsing, unchanged-CUE audio
  sibling dedup, parseCueSheet handler resolves SAF audio siblings
- Dart: FFmpegService.splitCueToTracks, CUE split UI in track metadata
  screen, persistent output dir for SAF splits with write-back
- CUE virtual path normalization across fileExists/fileStat/deleteFile/
  openFile; play/share/open blocked for virtual tracks with guidance to
  split first; delete only removes DB entry, not shared .cue file
- iOS: parseCueSheet handler
- Localization: 12 new CUE-related strings

Requested by @Seerafimm
Closes #201
2026-03-11 00:31:20 +07:00
zarzet 2c897992c5 feat: resolve audio metadata from file, backfill placeholder quality labels with actual bit depth and sample rate 2026-03-08 04:28:16 +07:00
zarzet 7d5cb574c6 feat: move Amazon Music to extension, fix Deezer download timeout 2026-03-08 04:15:28 +07:00
zarzet ab26d84632 chore: rebuild dev history without streaming-era commits 2026-02-27 13:48:44 +07:00
zarzet 882afd938b feat: add SongLink region setting and fix track metadata lookup with name+artist fallback
- Add configurable SongLink region (userCountry) setting with picker UI
- Pass songLinkRegion through download request payload to Go backend
- Go backend: thread-safe global SongLink region with per-request override
- Fix downloaded track not recognized in collection tap: add findByTrackAndArtist
  fallback in download history lookup chain (Spotify ID → ISRC → name+artist)
- Apply same name+artist fallback to isDownloaded check in track options sheet
- Add missing library_database.dart import for LocalLibraryItem
2026-02-19 19:16:55 +07:00
zarzet ab72a10578 feat: add multi-select to library folders, batch playlist picker, and Go backend FD safety
- Add multi-select support to library_tracks_folder_screen (wishlist, loved,
  playlist) with long-press to enter selection mode, animated bottom bar with
  batch remove/download/add-to-playlist actions, and PopScope exit handling
- Create batch showAddTracksToPlaylistSheet in playlist_picker_sheet with
  playlist thumbnail widget and cover image support
- Add playlist grid selection tint overlay in queue_tab
- Optimize collection lookups with pre-built _allPlaylistTrackKeys index and
  isTrackInAnyPlaylist/hasPlaylistTracks accessors
- Eagerly initialize localLibraryProvider and libraryCollectionsProvider
- Enable SQLite WAL mode and PRAGMA synchronous=NORMAL across all databases
- Go backend: duplicate SAF output FDs before provider attempts to prevent
  fdsan abort on fallback retries; close detached FDs after download completes
- Go backend: rewrite compatibilityTransport to try HTTPS first and only
  fallback to HTTP on transport-level failures, preventing redirect loops
- Go backend: enforce HTTPS-only for extension sandbox HTTP clients
2026-02-19 18:27:14 +07:00
zarzet e39756fa3f refactor: migrate persistence to SQLite, add strict provider mode, and optimize collection lookups
- Replace SharedPreferences with SQLite (AppStateDatabase, LibraryCollectionsDatabase) for download queue, library collections, and recent access history
- Add Set-based O(1) track containment checks for wishlist, loved, and playlist tracks
- Add batch addTracksToPlaylist with PlaylistAddBatchResult
- Go backend: strict mode locks download to selected provider when auto fallback is off
- Go backend: fix extension progress normalization (percent/100) and lifecycle tracking
- Go backend: case-insensitive provider ID matching throughout fallback chain
- Lyrics embedding now respects lyricsMode setting (embed/both/off)
- Debounced queue persistence to reduce write frequency
- Fix shouldUseFallback logic to not be gated by useExtensions
2026-02-19 16:40:03 +07:00
zarzet 8e794e1ef1 feat: Library tab redesign with playlists, drag-and-drop categorization, and pinned app bars 2026-02-19 15:55:24 +07:00
zarzet 8e6cbcbc2a feat: YouTube customizable bitrate, improved title matching, SpotubeDL engine fallback
- Add configurable YouTube Opus (96-256kbps) and MP3 (96-320kbps) bitrates
- Improve title matching with loose normalization for symbol-heavy tracks
- Add SpotubeDL engine v2 fallback for MP3 requests
- Improve filename sanitization in track metadata screen
- Bump version to 3.6.9+82
2026-02-17 17:22:24 +07:00
zarzet f4934dcb28 feat: add lyrics source tracking, Paxsenix partner, and dedicated lyrics provider settings page
- Add getLyricsLRCWithSource to return lyrics with source metadata
- Display lyrics source in track metadata screen
- Improve LRC parsing to preserve background vocal tags
- Add dedicated LyricsProviderPriorityPage for provider configuration
- Add Paxsenix as lyrics proxy partner for Apple Music/QQ Music
- Handle inline timestamps and speaker prefixes in LRC display
2026-02-14 02:15:36 +07:00
zarzet 30973a8e78 feat: lyrics provider extensions, configurable lyrics cascade, and iOS method channel parity
Add lyrics_provider as a new extension type alongside metadata_provider and
download_provider. Extensions implementing fetchLyrics() are called before
built-in providers, giving user-installed extensions highest priority.

Built-in lyrics cascade is now configurable from Download Settings:
  - Reorderable provider list (LRCLIB, Musixmatch, Netease, Apple Music, QQ Music)
  - Per-provider options: Netease translation/romanization, Apple/QQ multi-person
    word-by-word speaker tags, Musixmatch language code
  - Provider order and options synced to Go backend on app start and on change

Go backend changes:
  - New lyrics_provider manifest type with validation (extension_manifest.go)
  - ExtensionProviderWrapper.FetchLyrics() with Goja JS bridge (extension_providers.go)
  - Configurable SetLyricsProviderOrder/GetLyricsProviderOrder cascade (lyrics.go)
  - LyricsFetchOptions struct for per-provider settings (lyrics.go)
  - Extracted tryLRCLIB() helper, randomized LRCLIB User-Agent (lyrics.go)
  - Refactored msToLRCTimestamp to separate msToLRCTimestampInline (lyrics.go)
  - New provider source files: lyrics_apple.go, lyrics_musixmatch.go,
    lyrics_netease.go, lyrics_qqmusic.go
  - JSON export functions for lyrics settings (exports.go)
  - hasLyricsProvider field in extension manager JSON output

Platform channels:
  - Android (MainActivity.kt): setLyricsProviders, getLyricsProviders,
    getAvailableLyricsProviders, setLyricsFetchOptions, getLyricsFetchOptions
  - iOS (AppDelegate.swift): same 5 method channel handlers for iOS parity

Flutter side:
  - Extension model: hasLyricsProvider field + Lyrics Provider capability badge
  - Settings model: lyricsProviders, lyricsIncludeTranslationNetease,
    lyricsIncludeRomanizationNetease, lyricsMultiPersonWordByWord,
    musixmatchLanguage fields with generated serialization
  - Settings provider: setters + _syncLyricsSettingsToBackend()
  - Download settings UI: provider picker, toggle switches, language picker
  - Platform bridge: lyrics provider/options methods

Docs: lyrics provider extension documentation in site/docs.html
CHANGELOG: updated with lyrics provider and search feature entries
2026-02-14 01:42:18 +07:00