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
- Add responsive scaling across album, artist, playlist, downloaded album, local album, queue, setup, and tutorial screens to prevent overflow on smaller devices
- Add new Storage & Cache management page (Settings > Storage & Cache) with per-category clear and cleanup actions
- Extract normalizedHeaderTopPadding utility for consistent app bar padding
- Improve home search Recent Access behavior: show when focused with empty input, hide stale results during active recent mode
- Add excluded-downloaded-count tracking to local library scan stats
- Add recentEmpty and recentShowAllDownloads l10n keys (EN + ID)
- Add full cache management l10n keys (EN + ID)
- Fix about_page indentation and formatting consistency
- Fix appearance_settings_page formatting
- Fix downloaded_album_screen and local_album_screen formatting and responsive sizing
