feat(library): local lossless index, filters, and conserve dedicated page (#871)

* feat(library): local lossless index, filters, and conserve dedicated page

Add SQLite-backed lossless album browse and advanced-search filtering,
wire All Albums and artist/album lossless drill-down mode, and hide the
standalone /lossless-albums nav entry from sidebar visibility settings
(conserved route, default off).

* docs(release): note lossless local index in CHANGELOG and credits (PR #871)

src/locales/en/albums.ts

@@ -14,6 +14,9 @@ export const albums = {
   compilationTooltipAll: 'All albums · click: only compilations',
   compilationTooltipOnly: 'Only compilations · click: hide compilations',
   compilationTooltipHide: 'Compilations hidden · click: show all',
+  losslessLabel: 'Lossless',
+  losslessTooltipOn: 'Lossless albums only · click to show all',
+  losslessTooltipOff: 'Show lossless albums only',
   select: 'Multi-select',
   startSelect: 'Enable multi-select',
   cancelSelect: 'Cancel',
@@ -29,4 +32,7 @@ export const albums = {
   downloadZipFailed: 'Failed to download {{name}}',
   offlineQueuing: 'Queuing {{count}} album(s) for offline…',
   offlineFailed: 'Failed to add {{name}} offline',
+  noFavorites: 'No favorite albums match the current filters.',
+  noCompilations: 'No compilations match the current filters.',
+  noMatchingFilters: 'No albums match the current filters.',
 };

src/locales/en/artistDetail.ts

@@ -10,7 +10,9 @@ export const artistDetail = {
   noRadio: 'No similar tracks found for this artist.',
   notFound: 'Artist not found.',
   albumsBy: 'Albums by {{name}}',
+  albumsByLossless: 'Lossless albums by {{name}}',
   topTracks: 'Top Tracks',
+  topTracksLossless: 'Lossless Tracks',
   noAlbums: 'No albums found.',
   trackTitle: 'Title',
   trackAlbum: 'Album',

src/locales/en/losslessAlbums.ts

@@ -2,4 +2,6 @@ export const losslessAlbums = {
   empty: 'No lossless albums in this library yet.',
   unsupported: 'This server does not expose the metadata needed to find lossless albums.',
   slowFetchHint: 'Loads slower than other album pages — Psysonic walks the full song catalog by quality.',
+  modeBanner: 'Lossless mode — showing FLAC, WAV, and other lossless formats only.',
+  modeBannerExit: 'Show all formats',
 };

src/locales/en/search.ts

@@ -23,8 +23,9 @@ export const search = {
   advancedYearFrom: 'from',
   advancedYearTo: 'to',
   advancedBpm: 'BPM',
-  advancedBpmLocalNote: 'Measured analysis BPM takes priority over file tags when the local index is enabled',
   advancedBpmClear: 'Clear BPM filter',
+  advancedLossless: 'Format',
+  advancedLosslessOnly: 'Lossless only',
   bpmSourceTag: 'BPM from file tag',
   bpmSourceAnalysis: 'BPM from audio analysis',
   advancedMoodGroup: 'Mood',