feat(i18n): replace all hardcoded strings with l10n keys across 13 screens

- Added 80+ new keys to app_en.arb covering lyrics, SAF, download settings,
  snackbars, dialogs, home, cache, and store screens
- Replaced hardcoded strings in main_shell, album_screen, playlist_screen,
  library_tracks_folder_screen, home_tab, settings_tab, download_settings_page,
  lyrics_provider_priority_page, track_metadata_screen, extension_detail_page,
  cache_management_page, local_album_screen, downloaded_album_screen, search_screen
- Fixed structural bug in track_metadata_screen (duplicate closing brace)
- Added missing l10n.dart import to search_screen.dart
- Regenerated all app_localizations*.dart files via flutter gen-l10n

lib/screens/album_screen.dart

@@ -619,7 +619,7 @@ class _AlbumScreenState extends ConsumerState<AlbumScreen> {
           size: 22,
           color: allLoved ? Colors.redAccent : Colors.white,
         ),
-        tooltip: allLoved ? 'Remove from Loved' : 'Love All',
+        tooltip: allLoved ? context.l10n.trackOptionRemoveFromLoved : context.l10n.tooltipLoveAll,
         padding: EdgeInsets.zero,
       ),
     );
@@ -642,7 +642,7 @@ class _AlbumScreenState extends ConsumerState<AlbumScreen> {
             ? null
             : () => showAddTracksToPlaylistSheet(context, ref, _tracks!),
         icon: const Icon(Icons.add, size: 22, color: Colors.white),
-        tooltip: 'Add to Playlist',
+        tooltip: context.l10n.tooltipAddToPlaylist,
         padding: EdgeInsets.zero,
       ),
     );
@@ -660,7 +660,11 @@ class _AlbumScreenState extends ConsumerState<AlbumScreen> {
       }
       if (mounted) {
         ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(content: Text('Removed ${tracks.length} tracks from Loved')),
+          SnackBar(
+            content: Text(
+              context.l10n.snackbarRemovedTracksFromLoved(tracks.length),
+            ),
+          ),
         );
       }
     } else {
@@ -673,7 +677,11 @@ class _AlbumScreenState extends ConsumerState<AlbumScreen> {
       }
       if (mounted) {
         ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(content: Text('Added $addedCount tracks to Loved')),
+          SnackBar(
+            content: Text(
+              context.l10n.snackbarAddedTracksToLoved(addedCount),
+            ),
+          ),
         );
       }
     }

lib/screens/downloaded_album_screen.dart

@@ -363,7 +363,7 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen> {
     if (tracks.isEmpty) {
       return Scaffold(
         appBar: AppBar(title: Text(widget.albumName)),
-        body: Center(child: Text('No tracks found for this album')),
+        body: Center(child: Text(context.l10n.noTracksFoundForAlbum)),
       );
     }
 

lib/screens/home_tab.dart

@@ -816,7 +816,7 @@ class _HomeTabState extends ConsumerState<HomeTab>
                     const SizedBox(height: 12),
                     CheckboxListTile(
                       contentPadding: EdgeInsets.zero,
-                      title: const Text('Skip already downloaded songs'),
+                      title: Text(l10n.homeSkipAlreadyDownloaded),
                       value: skipDownloaded,
                       onChanged: (value) {
                         setDialogState(() {
@@ -1750,7 +1750,7 @@ class _HomeTabState extends ConsumerState<HomeTab>
             ),
             ListTile(
               leading: Icon(Icons.album, color: colorScheme.onSurfaceVariant),
-              title: const Text('Go to Album'),
+              title: Text(context.l10n.homeGoToAlbum),
               onTap: () {
                 Navigator.pop(context);
                 _navigateToTrackAlbum(item);
@@ -1824,7 +1824,7 @@ class _HomeTabState extends ConsumerState<HomeTab>
     } else {
       ScaffoldMessenger.of(
         context,
-      ).showSnackBar(const SnackBar(content: Text('Album info not available')));
+      ).showSnackBar(SnackBar(content: Text(context.l10n.homeAlbumInfoUnavailable)));
     }
   }
 

lib/screens/library_tracks_folder_screen.dart

@@ -850,8 +850,8 @@ class _LibraryTracksFolderScreenState
         final colorScheme = Theme.of(dialogContext).colorScheme;
         return AlertDialog(
           backgroundColor: colorScheme.surfaceContainerHigh,
-          title: const Text('Download All'),
-          content: Text('Download ${tracks.length} tracks?'),
+          title: Text(context.l10n.dialogDownloadAllTitle),
+          content: Text(context.l10n.dialogDownloadAllMessage(tracks.length)),
           actions: [
             TextButton(
               onPressed: () => Navigator.pop(dialogContext),
@@ -862,7 +862,7 @@ class _LibraryTracksFolderScreenState
                 Navigator.pop(dialogContext);
                 _downloadAll(tracks);
               },
-              child: const Text('Download'),
+              child: Text(context.l10n.dialogDownload),
             ),
           ],
         );

lib/screens/local_album_screen.dart

@@ -247,7 +247,7 @@ class _LocalAlbumScreenState extends ConsumerState<LocalAlbumScreen> {
     if (tracks.isEmpty) {
       return Scaffold(
         appBar: AppBar(title: Text(widget.albumName)),
-        body: const Center(child: Text('No tracks found for this album')),
+        body: Center(child: Text(context.l10n.noTracksFoundForAlbum)),
       );
     }
 

lib/screens/main_shell.dart

@@ -181,25 +181,20 @@ class _MainShellState extends ConsumerState<MainShell> {
           size: 32,
           color: colorScheme.primary,
         ),
-        title: const Text('Storage Update Required'),
-        content: const Column(
+        title: Text(context.l10n.safMigrationTitle),
+        content: Column(
           mainAxisSize: MainAxisSize.min,
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
-            Text(
-              'SpotiFLAC now uses Android Storage Access Framework (SAF) for downloads. '
-              'This fixes "permission denied" errors on Android 10+.',
-            ),
-            SizedBox(height: 12),
-            Text(
-              'Please select your download folder again to switch to the new storage system.',
-            ),
+            Text(context.l10n.safMigrationMessage1),
+            const SizedBox(height: 12),
+            Text(context.l10n.safMigrationMessage2),
           ],
         ),
         actions: [
           TextButton(
             onPressed: () => Navigator.pop(ctx),
-            child: const Text('Later'),
+            child: Text(context.l10n.updateLater),
           ),
           FilledButton(
             onPressed: () async {
@@ -219,15 +214,15 @@ class _MainShellState extends ConsumerState<MainShell> {
                       );
                   if (mounted) {
                     ScaffoldMessenger.of(context).showSnackBar(
-                      const SnackBar(
-                        content: Text('Download folder updated to SAF mode'),
+                      SnackBar(
+                        content: Text(context.l10n.safMigrationSuccess),
                       ),
                     );
                   }
                 }
               }
             },
-            child: const Text('Select Folder'),
+            child: Text(context.l10n.setupSelectFolder),
           ),
         ],
       ),

lib/screens/playlist_screen.dart

@@ -482,7 +482,7 @@ class _PlaylistScreenState extends ConsumerState<PlaylistScreen> {
           size: 22,
           color: allLoved ? Colors.redAccent : Colors.white,
         ),
-        tooltip: allLoved ? 'Remove from Loved' : 'Love All',
+        tooltip: allLoved ? context.l10n.trackOptionRemoveFromLoved : context.l10n.tooltipLoveAll,
         padding: EdgeInsets.zero,
       ),
     );
@@ -505,7 +505,7 @@ class _PlaylistScreenState extends ConsumerState<PlaylistScreen> {
   Widget _buildAddToPlaylistButton(BuildContext context) {
     return _buildCircleButton(
       icon: Icons.playlist_add,
-      tooltip: 'Add to Playlist',
+      tooltip: context.l10n.tooltipAddToPlaylist,
       onPressed: _tracks.isEmpty
           ? null
           : () => showAddTracksToPlaylistSheet(context, ref, _tracks),
@@ -520,8 +520,8 @@ class _PlaylistScreenState extends ConsumerState<PlaylistScreen> {
         final colorScheme = Theme.of(dialogContext).colorScheme;
         return AlertDialog(
           backgroundColor: colorScheme.surfaceContainerHigh,
-          title: const Text('Download All'),
-          content: Text('Download ${_tracks.length} tracks?'),
+          title: Text(context.l10n.dialogDownloadAllTitle),
+          content: Text(context.l10n.dialogDownloadAllMessage(_tracks.length)),
           actions: [
             TextButton(
               onPressed: () => Navigator.pop(dialogContext),
@@ -532,7 +532,7 @@ class _PlaylistScreenState extends ConsumerState<PlaylistScreen> {
                 Navigator.pop(dialogContext);
                 _downloadAll(context);
               },
-              child: const Text('Download'),
+              child: Text(context.l10n.dialogDownload),
             ),
           ],
         );
@@ -552,7 +552,11 @@ class _PlaylistScreenState extends ConsumerState<PlaylistScreen> {
       }
       if (mounted) {
         ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(content: Text('Removed ${tracks.length} tracks from Loved')),
+          SnackBar(
+            content: Text(
+              context.l10n.snackbarRemovedTracksFromLoved(tracks.length),
+            ),
+          ),
         );
       }
     } else {
@@ -565,7 +569,11 @@ class _PlaylistScreenState extends ConsumerState<PlaylistScreen> {
       }
       if (mounted) {
         ScaffoldMessenger.of(context).showSnackBar(
-          SnackBar(content: Text('Added $addedCount tracks to Loved')),
+          SnackBar(
+            content: Text(
+              context.l10n.snackbarAddedTracksToLoved(addedCount),
+            ),
+          ),
         );
       }
     }

lib/screens/search_screen.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:cached_network_image/cached_network_image.dart';
+import 'package:spotiflac_android/l10n/l10n.dart';
 import 'package:spotiflac_android/services/cover_cache_manager.dart';
 import 'package:spotiflac_android/models/track.dart';
 import 'package:spotiflac_android/providers/track_provider.dart';
@@ -52,7 +53,7 @@ class _SearchScreenState extends ConsumerState<SearchScreen> {
         .addToQueue(track, settings.defaultService);
     ScaffoldMessenger.of(
       context,
-    ).showSnackBar(SnackBar(content: Text('Added "${track.name}" to queue')));
+    ).showSnackBar(SnackBar(content: Text(context.l10n.snackbarAddedToQueue(track.name))));
   }
 
   @override

lib/screens/settings/cache_management_page.dart

@@ -56,7 +56,7 @@ class _CacheManagementPageState extends ConsumerState<CacheManagementPage> {
       setState(() => _isLoading = false);
       ScaffoldMessenger.of(
         context,
-      ).showSnackBar(SnackBar(content: Text('Error: $e')));
+      ).showSnackBar(SnackBar(content: Text(context.l10n.snackbarError(e.toString()))));
     }
   }
 
@@ -282,7 +282,7 @@ class _CacheManagementPageState extends ConsumerState<CacheManagementPage> {
       if (!mounted) return;
       ScaffoldMessenger.of(
         context,
-      ).showSnackBar(SnackBar(content: Text('Error: $e')));
+      ).showSnackBar(SnackBar(content: Text(context.l10n.snackbarError(e.toString()))));
     } finally {
       if (mounted) {
         setState(() => _busyAction = null);
@@ -394,7 +394,7 @@ class _CacheManagementPageState extends ConsumerState<CacheManagementPage> {
             ),
             actions: [
               IconButton(
-                tooltip: 'Refresh',
+                tooltip: context.l10n.cacheRefresh,
                 onPressed: _isBusy ? null : _refreshOverview,
                 icon: const Icon(Icons.refresh),
               ),

lib/screens/settings/download_settings_page.dart

@@ -376,7 +376,7 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
                     title: context.l10n.downloadAskBeforeDownload,
                     subtitle: isBuiltInService
                         ? context.l10n.downloadAskQualitySubtitle
-                        : 'Select a built-in service to enable',
+                        : context.l10n.downloadSelectServiceToEnable,
                     value: settings.askQualityBeforeDownload,
                     enabled: isBuiltInService,
                     onChanged: (value) => ref
@@ -413,7 +413,7 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
                     // Lossy 320kbps option (Tidal only) - downloads M4A, converts to MP3/Opus
                     if (isTidalService)
                       _QualityOption(
-                        title: 'Lossy 320kbps',
+                        title: context.l10n.downloadLossy320,
                         subtitle: _getTidalHighFormatLabel(
                           settings.tidalHighFormat,
                         ),
@@ -426,7 +426,7 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
                     if (isTidalService && settings.audioQuality == 'HIGH')
                       SettingsItem(
                         icon: Icons.tune,
-                        title: 'Lossy Format',
+                        title: context.l10n.downloadLossyFormat,
                         subtitle: _getTidalHighFormatLabel(
                           settings.tidalHighFormat,
                         ),
@@ -451,7 +451,7 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
                           const SizedBox(width: 8),
                           Expanded(
                             child: Text(
-                              'Select Tidal or Qobuz above to configure quality',
+                              context.l10n.downloadSelectTidalQobuz,
                               style: Theme.of(context).textTheme.bodySmall
                                   ?.copyWith(
                                     color: colorScheme.onSurfaceVariant,
@@ -504,7 +504,7 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
                     title: context.l10n.optionsEmbedLyrics,
                     subtitle: settings.embedMetadata
                         ? context.l10n.optionsEmbedLyricsSubtitle
-                        : 'Disabled while Embed Metadata is turned off',
+                        : context.l10n.downloadEmbedLyricsDisabled,
                     value: settings.embedLyrics,
                     enabled: settings.embedMetadata,
                     onChanged: (value) => ref
@@ -528,7 +528,7 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
                     ),
                     SettingsItem(
                       icon: Icons.source_outlined,
-                      title: 'Lyrics Providers',
+                      title: context.l10n.lyricsProvidersTitle,
                       subtitle: _getLyricsProvidersSubtitle(
                         settings.lyricsProviders,
                       ),
@@ -541,10 +541,10 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
                     ),
                     SettingsSwitchItem(
                       icon: Icons.translate_outlined,
-                      title: 'Netease: Include Translation',
+                      title: context.l10n.downloadNeteaseIncludeTranslation,
                       subtitle: settings.lyricsIncludeTranslationNetease
-                          ? 'Append translated lyrics when available'
-                          : 'Use original lyrics only',
+                          ? context.l10n.downloadNeteaseIncludeTranslationEnabled
+                          : context.l10n.downloadNeteaseIncludeTranslationDisabled,
                       value: settings.lyricsIncludeTranslationNetease,
                       onChanged: (value) => ref
                           .read(settingsProvider.notifier)
@@ -552,10 +552,10 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
                     ),
                     SettingsSwitchItem(
                       icon: Icons.text_fields_outlined,
-                      title: 'Netease: Include Romanization',
+                      title: context.l10n.downloadNeteaseIncludeRomanization,
                       subtitle: settings.lyricsIncludeRomanizationNetease
-                          ? 'Append romanized lyrics when available'
-                          : 'Disabled',
+                          ? context.l10n.downloadNeteaseIncludeRomanizationEnabled
+                          : context.l10n.downloadNeteaseIncludeRomanizationDisabled,
                       value: settings.lyricsIncludeRomanizationNetease,
                       onChanged: (value) => ref
                           .read(settingsProvider.notifier)
@@ -563,10 +563,10 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
                     ),
                     SettingsSwitchItem(
                       icon: Icons.record_voice_over_outlined,
-                      title: 'Apple/QQ Multi-Person Word-by-Word',
+                      title: context.l10n.downloadAppleQqMultiPerson,
                       subtitle: settings.lyricsMultiPersonWordByWord
-                          ? 'Enable v1/v2 speaker and [bg:] tags'
-                          : 'Simplified word-by-word formatting',
+                          ? context.l10n.downloadAppleQqMultiPersonEnabled
+                          : context.l10n.downloadAppleQqMultiPersonDisabled,
                       value: settings.lyricsMultiPersonWordByWord,
                       onChanged: (value) => ref
                           .read(settingsProvider.notifier)
@@ -574,9 +574,9 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
                     ),
                     SettingsItem(
                       icon: Icons.language_outlined,
-                      title: 'Musixmatch Language',
+                      title: context.l10n.downloadMusixmatchLanguage,
                       subtitle: settings.musixmatchLanguage.isEmpty
-                          ? 'Auto (original)'
+                          ? context.l10n.downloadMusixmatchLanguageAuto
                           : settings.musixmatchLanguage.toUpperCase(),
                       onTap: () => _showMusixmatchLanguagePicker(
                         context,
@@ -622,8 +622,8 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
                     icon: Icons.library_music_outlined,
                     title: context.l10n.downloadSeparateSinglesFolder,
                     subtitle: settings.separateSingles
-                        ? 'Albums/ and Singles/ folders'
-                        : 'All files in same structure',
+                        ? context.l10n.downloadSeparateSinglesEnabled
+                        : context.l10n.downloadSeparateSinglesDisabled,
                     value: settings.separateSingles,
                     onChanged: (value) => ref
                         .read(settingsProvider.notifier)
@@ -670,9 +670,9 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
                         .read(settingsProvider.notifier)
                         .setUseAlbumArtistForFolders(value),
                   ),
-                  SettingsItem(
+                    SettingsItem(
                     icon: Icons.filter_alt_outlined,
-                    title: 'Artist Name Filters',
+                    title: context.l10n.downloadArtistNameFilters,
                     subtitle: _getArtistFolderFilterSubtitle(
                       context,
                       usePrimaryArtistOnly: settings.usePrimaryArtistOnly,
@@ -707,28 +707,16 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
                   if (_artistFolderFiltersExpanded)
                     SettingsSwitchItem(
                       icon: Icons.group_remove_outlined,
-                      title: 'Filter contributing artists in Album Artist',
+                      title: context.l10n.downloadFilterContributing,
                       subtitle: settings.filterContributingArtistsInAlbumArtist
-                          ? 'Album Artist metadata uses primary artist only'
-                          : 'Keep full Album Artist metadata value',
+                          ? context.l10n.downloadFilterContributingEnabled
+                          : context.l10n.downloadFilterContributingDisabled,
                       value: settings.filterContributingArtistsInAlbumArtist,
                       onChanged: (value) => ref
                           .read(settingsProvider.notifier)
                           .setFilterContributingArtistsInAlbumArtist(value),
                       showDivider: false,
                     ),
-                  SettingsSwitchItem(
-                    icon: Icons.person_outline,
-                    title: context.l10n.downloadUsePrimaryArtistOnly,
-                    subtitle: settings.usePrimaryArtistOnly
-                        ? context.l10n.downloadUsePrimaryArtistOnlyEnabled
-                        : context.l10n.downloadUsePrimaryArtistOnlyDisabled,
-                    value: settings.usePrimaryArtistOnly,
-                    onChanged: (value) => ref
-                        .read(settingsProvider.notifier)
-                        .setUsePrimaryArtistOnly(value),
-                    showDivider: false,
-                    ),
                 ],
               ),
             ),
@@ -753,7 +741,7 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
                   ),
                   SettingsItem(
                     icon: Icons.public,
-                    title: 'SongLink Region',
+                    title: context.l10n.downloadSongLinkRegion,
                     subtitle: _getSongLinkRegionLabel(settings.songLinkRegion),
                     onTap: () => _showSongLinkRegionPicker(
                       context,
@@ -763,10 +751,10 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
                   ),
                   SettingsSwitchItem(
                     icon: Icons.security_outlined,
-                    title: 'Network compatibility mode',
+                    title: context.l10n.downloadNetworkCompatibilityMode,
                     subtitle: settings.networkCompatibilityMode
-                        ? 'Enabled: try HTTP + accept invalid TLS certificates (unsafe)'
-                        : 'Off: strict HTTPS certificate validation (recommended)',
+                        ? context.l10n.downloadNetworkCompatibilityModeEnabled
+                        : context.l10n.downloadNetworkCompatibilityModeDisabled,
                     value: settings.networkCompatibilityMode,
                     onChanged: (value) {
                       ref
@@ -1045,7 +1033,7 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
                     ),
                     const SizedBox(height: 8),
                     Text(
-                      'Customize how your files are named.',
+                      context.l10n.downloadFilenameDescription,
                       style: Theme.of(context).textTheme.bodyMedium?.copyWith(
                         color: colorScheme.onSurfaceVariant,
                       ),
@@ -1070,7 +1058,7 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
                     const SizedBox(height: 24),
 
                     Text(
-                      'Tap to insert tag:',
+                      context.l10n.downloadFilenameInsertTag,
                       style: Theme.of(context).textTheme.titleSmall?.copyWith(
                         fontWeight: FontWeight.bold,
                       ),
@@ -1238,7 +1226,7 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
             Padding(
               padding: const EdgeInsets.fromLTRB(24, 24, 24, 8),
               child: Text(
-                'Download Location',
+                context.l10n.setupDownloadLocationTitle,
                 style: Theme.of(
                   ctx,
                 ).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold),
@@ -1247,7 +1235,7 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
             Padding(
               padding: const EdgeInsets.fromLTRB(24, 0, 24, 16),
               child: Text(
-                'Choose storage mode for downloaded files.',
+                context.l10n.downloadLocationSubtitle,
                 style: Theme.of(ctx).textTheme.bodyMedium?.copyWith(
                   color: colorScheme.onSurfaceVariant,
                 ),
@@ -1255,8 +1243,8 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
             ),
             ListTile(
               leading: Icon(Icons.folder_special, color: colorScheme.primary),
-              title: const Text('App folder (non-SAF)'),
-              subtitle: const Text('Use default Music/SpotiFLAC path'),
+              title: Text(context.l10n.storageModeAppFolder),
+              subtitle: Text(context.l10n.storageModeAppFolderSubtitle),
               trailing: !isSafMode ? const Icon(Icons.check) : null,
               onTap: () async {
                 Navigator.pop(ctx);
@@ -1269,10 +1257,8 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
             ),
             ListTile(
               leading: Icon(Icons.folder_open, color: colorScheme.primary),
-              title: const Text('SAF folder'),
-              subtitle: const Text(
-                'Pick folder via Android Storage Access Framework',
-              ),
+              title: Text(context.l10n.storageModeSaf),
+              subtitle: Text(context.l10n.storageModeSafSubtitle),
               trailing: isSafMode ? const Icon(Icons.check) : null,
               onTap: () async {
                 Navigator.pop(ctx);
@@ -1546,7 +1532,7 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
   };
 
   String _getLyricsProvidersSubtitle(List<String> providers) {
-    if (providers.isEmpty) return 'None enabled';
+    if (providers.isEmpty) return context.l10n.downloadProvidersNoneEnabled;
     return providers.map((p) => _providerDisplayNames[p] ?? p).join(' > ');
   }
 
@@ -1645,14 +1631,14 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
             Text(
-              'Musixmatch Language',
+              context.l10n.downloadMusixmatchLanguage,
               style: Theme.of(
                 context,
               ).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold),
             ),
             const SizedBox(height: 8),
             Text(
-              'Set preferred language code (example: en, es, ja). Leave empty for auto.',
+              context.l10n.downloadMusixmatchLanguageDesc,
               style: Theme.of(context).textTheme.bodyMedium?.copyWith(
                 color: colorScheme.onSurfaceVariant,
               ),
@@ -1661,9 +1647,9 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
             TextField(
               controller: controller,
               textInputAction: TextInputAction.done,
-              decoration: const InputDecoration(
-                labelText: 'Language code',
-                hintText: 'auto / en / es / ja',
+              decoration: InputDecoration(
+                labelText: context.l10n.downloadMusixmatchLanguageCode,
+                hintText: context.l10n.downloadMusixmatchLanguageHint,
               ),
             ),
             const SizedBox(height: 16),
@@ -1682,7 +1668,7 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
                         .setMusixmatchLanguage('');
                     Navigator.pop(context);
                   },
-                  child: const Text('Auto'),
+                  child: Text(context.l10n.downloadMusixmatchAuto),
                 ),
                 const SizedBox(width: 8),
                 FilledButton(
@@ -1739,7 +1725,7 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
             Padding(
               padding: const EdgeInsets.fromLTRB(24, 24, 24, 8),
               child: Text(
-                'Lossy 320kbps Format',
+                context.l10n.downloadLossy320Format,
                 style: Theme.of(
                   context,
                 ).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold),
@@ -1748,7 +1734,7 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
             Padding(
               padding: const EdgeInsets.fromLTRB(24, 0, 24, 16),
               child: Text(
-                'Choose the output format for Tidal 320kbps lossy downloads. The original AAC stream will be converted to your selected format.',
+                context.l10n.downloadLossy320FormatDesc,
                 style: Theme.of(context).textTheme.bodyMedium?.copyWith(
                   color: colorScheme.onSurfaceVariant,
                 ),
@@ -1756,8 +1742,8 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
             ),
             ListTile(
               leading: const Icon(Icons.audiotrack),
-              title: const Text('MP3 320kbps'),
-              subtitle: const Text('Best compatibility, ~10MB per track'),
+              title: Text(context.l10n.downloadLossyMp3),
+              subtitle: Text(context.l10n.downloadLossyMp3Subtitle),
               trailing: current == 'mp3_320'
                   ? Icon(Icons.check, color: colorScheme.primary)
                   : null,
@@ -1770,8 +1756,8 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
             ),
             ListTile(
               leading: const Icon(Icons.graphic_eq),
-              title: const Text('Opus 256kbps'),
-              subtitle: const Text('Best quality Opus, ~8MB per track'),
+              title: Text(context.l10n.downloadLossyOpus256),
+              subtitle: Text(context.l10n.downloadLossyOpus256Subtitle),
               trailing: current == 'opus_256'
                   ? Icon(Icons.check, color: colorScheme.primary)
                   : null,
@@ -1784,8 +1770,8 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
             ),
             ListTile(
               leading: const Icon(Icons.graphic_eq),
-              title: const Text('Opus 128kbps'),
-              subtitle: const Text('Smallest size, ~4MB per track'),
+              title: Text(context.l10n.downloadLossyOpus128),
+              subtitle: Text(context.l10n.downloadLossyOpus128Subtitle),
               trailing: current == 'opus_128'
                   ? Icon(Icons.check, color: colorScheme.primary)
                   : null,
@@ -1842,7 +1828,7 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
             ListTile(
               leading: const Icon(Icons.signal_cellular_alt),
               title: Text(context.l10n.settingsDownloadNetworkAny),
-              subtitle: const Text('WiFi + Mobile Data'),
+              subtitle: Text(context.l10n.downloadNetworkAnySubtitle),
               trailing: current == 'any'
                   ? Icon(Icons.check, color: colorScheme.primary)
                   : null,
@@ -1856,7 +1842,7 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
             ListTile(
               leading: const Icon(Icons.wifi),
               title: Text(context.l10n.settingsDownloadNetworkWifiOnly),
-              subtitle: const Text('Pause downloads on mobile data'),
+              subtitle: Text(context.l10n.downloadNetworkWifiOnlySubtitle),
               trailing: current == 'wifi_only'
                   ? Icon(Icons.check, color: colorScheme.primary)
                   : null,
@@ -1897,17 +1883,17 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
             children: [
               Padding(
                 padding: const EdgeInsets.fromLTRB(24, 24, 24, 8),
-                child: Text(
-                  'SongLink Region',
-                  style: Theme.of(
-                    context,
-                  ).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold),
-                ),
+              child: Text(
+                context.l10n.downloadSongLinkRegion,
+                style: Theme.of(
+                  context,
+                ).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold),
               ),
-              Padding(
-                padding: const EdgeInsets.fromLTRB(24, 0, 24, 16),
-                child: Text(
-                  'Used as userCountry for SongLink API lookup.',
+            ),
+            Padding(
+              padding: const EdgeInsets.fromLTRB(24, 0, 24, 16),
+              child: Text(
+                context.l10n.downloadSongLinkRegionDesc,
                   style: Theme.of(context).textTheme.bodyMedium?.copyWith(
                     color: colorScheme.onSurfaceVariant,
                   ),
@@ -1968,12 +1954,12 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
             children: [
               Padding(
                 padding: const EdgeInsets.fromLTRB(24, 24, 24, 8),
-                child: Text(
-                  'Folder Organization',
-                  style: Theme.of(
-                    context,
-                  ).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold),
-                ),
+              child: Text(
+                context.l10n.downloadFolderOrganization,
+                style: Theme.of(
+                  context,
+                ).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold),
+              ),
               ),
               Padding(
                 padding: const EdgeInsets.fromLTRB(24, 0, 24, 16),

lib/screens/settings/extension_detail_page.dart

@@ -801,7 +801,7 @@ class _SettingItemState extends State<_SettingItem> {
   Future<void> _invokeAction(BuildContext context) async {
     if (widget.setting.action == null) {
       ScaffoldMessenger.of(context).showSnackBar(
-        const SnackBar(content: Text('No action defined for this button')),
+        SnackBar(content: Text(context.l10n.snackbarNoActionDefined)),
       );
       return;
     }
@@ -834,7 +834,7 @@ class _SettingItemState extends State<_SettingItem> {
       if (context.mounted) {
         ScaffoldMessenger.of(
           context,
-        ).showSnackBar(SnackBar(content: Text('Error: $e')));
+        ).showSnackBar(SnackBar(content: Text(context.l10n.snackbarError(e.toString()))));
       }
     } finally {
       if (mounted) {

lib/screens/settings/lyrics_provider_priority_page.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:spotiflac_android/l10n/l10n.dart';
 import 'package:spotiflac_android/providers/settings_provider.dart';
 import 'package:spotiflac_android/widgets/priority_settings_scaffold.dart';
 import 'package:spotiflac_android/widgets/settings_group.dart';
@@ -55,18 +56,18 @@ class _LyricsProviderPriorityPageState
 
     return PrioritySettingsScaffold(
       hasChanges: _hasChanges,
-      title: 'Lyrics Providers',
-      description:
-          'Enable, disable and reorder lyrics sources. Providers are tried top-to-bottom until lyrics are found.',
-      infoText:
-          'Extension lyrics providers always run before built-in providers. At least one provider must remain enabled.',
+      title: context.l10n.lyricsProvidersTitle,
+      description: context.l10n.lyricsProvidersDescription,
+      infoText: context.l10n.lyricsProvidersInfoText,
       onSave: _saveChanges,
       onConfirmDiscard: _confirmDiscard,
       slivers: [
         if (_enabledProviders.isNotEmpty)
           SliverToBoxAdapter(
             child: SettingsSectionHeader(
-              title: 'Enabled (${_enabledProviders.length})',
+              title: context.l10n.lyricsProvidersEnabledSection(
+                _enabledProviders.length,
+              ),
             ),
           ),
         if (_enabledProviders.isNotEmpty)
@@ -76,7 +77,7 @@ class _LyricsProviderPriorityPageState
               itemCount: _enabledProviders.length,
               itemBuilder: (context, index) {
                 final id = _enabledProviders[index];
-                final info = _getLyricsProviderInfo(id);
+                final info = _getLyricsProviderInfo(id, context);
                 return _EnabledProviderItem(
                   key: ValueKey(id),
                   providerId: id,
@@ -99,7 +100,9 @@ class _LyricsProviderPriorityPageState
         if (disabled.isNotEmpty)
           SliverToBoxAdapter(
             child: SettingsSectionHeader(
-              title: 'Disabled (${disabled.length})',
+              title: context.l10n.lyricsProvidersDisabledSection(
+                disabled.length,
+              ),
             ),
           ),
         if (disabled.isNotEmpty)
@@ -108,7 +111,7 @@ class _LyricsProviderPriorityPageState
             sliver: SliverList(
               delegate: SliverChildBuilderDelegate((context, index) {
                 final id = disabled[index];
-                final info = _getLyricsProviderInfo(id);
+                final info = _getLyricsProviderInfo(id, context);
                 return _DisabledProviderItem(
                   key: ValueKey(id),
                   providerId: id,
@@ -130,8 +133,8 @@ class _LyricsProviderPriorityPageState
   void _disableProvider(String id) {
     if (_enabledProviders.length <= 1) {
       ScaffoldMessenger.of(context).showSnackBar(
-        const SnackBar(
-          content: Text('At least one provider must remain enabled'),
+        SnackBar(
+          content: Text(context.l10n.lyricsProvidersAtLeastOne),
         ),
       );
       return;
@@ -150,7 +153,7 @@ class _LyricsProviderPriorityPageState
     });
     if (mounted) {
       ScaffoldMessenger.of(context).showSnackBar(
-        const SnackBar(content: Text('Lyrics provider priority saved')),
+        SnackBar(content: Text(context.l10n.lyricsProvidersSaved)),
       );
     }
   }
@@ -159,16 +162,16 @@ class _LyricsProviderPriorityPageState
     final result = await showDialog<bool>(
       context: context,
       builder: (context) => AlertDialog(
-        title: const Text('Discard changes?'),
-        content: const Text('You have unsaved changes that will be lost.'),
+        title: Text(context.l10n.dialogDiscardChanges),
+        content: Text(context.l10n.lyricsProvidersDiscardContent),
         actions: [
           TextButton(
             onPressed: () => Navigator.pop(context, false),
-            child: const Text('Cancel'),
+            child: Text(context.l10n.dialogCancel),
           ),
           FilledButton(
             onPressed: () => Navigator.pop(context, true),
-            child: const Text('Discard'),
+            child: Text(context.l10n.dialogDiscard),
           ),
         ],
       ),
@@ -176,48 +179,51 @@ class _LyricsProviderPriorityPageState
     return result ?? false;
   }
 
-  static _LyricsProviderInfo _getLyricsProviderInfo(String id) {
+  static _LyricsProviderInfo _getLyricsProviderInfo(
+    String id,
+    BuildContext context,
+  ) {
     switch (id) {
       case 'spotify_api':
         return _LyricsProviderInfo(
           name: 'Spotify Lyrics API',
-          description: 'Spotify-sourced synced lyrics via community API',
+          description: context.l10n.lyricsProviderSpotifyApiDesc,
           icon: Icons.music_note_outlined,
         );
       case 'lrclib':
         return _LyricsProviderInfo(
           name: 'LRCLIB',
-          description: 'Open-source synced lyrics database',
+          description: context.l10n.lyricsProviderLrclibDesc,
           icon: Icons.subtitles_outlined,
         );
       case 'netease':
         return _LyricsProviderInfo(
           name: 'Netease',
-          description: 'NetEase Cloud Music (good for Asian songs)',
+          description: context.l10n.lyricsProviderNeteaseDesc,
           icon: Icons.cloud_outlined,
         );
       case 'musixmatch':
         return _LyricsProviderInfo(
           name: 'Musixmatch',
-          description: 'Largest lyrics database (multi-language)',
+          description: context.l10n.lyricsProviderMusixmatchDesc,
           icon: Icons.translate,
         );
       case 'apple_music':
         return _LyricsProviderInfo(
           name: 'Apple Music',
-          description: 'Word-by-word synced lyrics (via proxy)',
+          description: context.l10n.lyricsProviderAppleMusicDesc,
           icon: Icons.music_note,
         );
       case 'qqmusic':
         return _LyricsProviderInfo(
           name: 'QQ Music',
-          description: 'QQ Music (good for Chinese songs, via proxy)',
+          description: context.l10n.lyricsProviderQqMusicDesc,
           icon: Icons.queue_music,
         );
       default:
         return _LyricsProviderInfo(
           name: id,
-          description: 'Extension provider',
+          description: context.l10n.lyricsProviderExtensionDesc,
           icon: Icons.extension,
         );
     }

lib/screens/settings/settings_tab.dart

@@ -107,8 +107,8 @@ class SettingsTab extends ConsumerWidget {
                   ),
                   SettingsItem(
                     icon: Icons.favorite_outline,
-                    title: 'Donate',
-                    subtitle: 'Support SpotiFLAC-Mobile development',
+                    title: l10n.settingsDonate,
+                    subtitle: l10n.settingsDonateSubtitle,
                     onTap: () => _navigateTo(context, const DonatePage()),
                     showDivider: false,
                   ),

lib/screens/track_metadata_screen.dart

@@ -1731,13 +1731,13 @@ class _TrackMetadataScreenState extends ConsumerState<TrackMetadataScreen> {
             );
             success = ok;
             if (!ok) {
-              error = 'Failed to write back to storage';
+              error = context.l10n.snackbarFailedToWriteStorage;
             }
           } else {
             success = true;
           }
         } else {
-          error = result['error']?.toString() ?? 'Failed to embed lyrics';
+          error = result['error']?.toString() ?? context.l10n.snackbarFailedToEmbedLyrics;
         }
       } else if (isMp3 || isOpus) {
         final metadata = _buildFallbackMetadata();
@@ -1783,7 +1783,7 @@ class _TrackMetadataScreenState extends ConsumerState<TrackMetadataScreen> {
         }
 
         if (ffmpegResult == null) {
-          error = 'Failed to embed lyrics';
+          error = context.l10n.snackbarFailedToEmbedLyrics;
         } else if (_isSafFile) {
           final ok = await PlatformBridge.writeTempToSaf(
             ffmpegResult,
@@ -1791,13 +1791,13 @@ class _TrackMetadataScreenState extends ConsumerState<TrackMetadataScreen> {
           );
           success = ok;
           if (!ok) {
-            error = 'Failed to write back to storage';
+            error = context.l10n.snackbarFailedToWriteStorage;
           }
         } else {
           success = true;
         }
       } else {
-        error = 'Unsupported audio format';
+        error = context.l10n.snackbarUnsupportedAudioFormat;
       }
 
       if (mounted) {
@@ -1812,7 +1812,7 @@ class _TrackMetadataScreenState extends ConsumerState<TrackMetadataScreen> {
         } else {
           setState(() => _isEmbedding = false);
           ScaffoldMessenger.of(context).showSnackBar(
-            SnackBar(content: Text(error ?? 'Failed to embed lyrics')),
+            SnackBar(content: Text(error ?? context.l10n.snackbarFailedToEmbedLyrics)),
           );
         }
       }
@@ -1821,7 +1821,7 @@ class _TrackMetadataScreenState extends ConsumerState<TrackMetadataScreen> {
         setState(() => _isEmbedding = false);
         ScaffoldMessenger.of(
           context,
-        ).showSnackBar(SnackBar(content: Text('Error: $e')));
+        ).showSnackBar(SnackBar(content: Text(context.l10n.snackbarError(e.toString()))));
       }
     } finally {
       if (coverPath != null) {
@@ -2271,7 +2271,7 @@ class _TrackMetadataScreenState extends ConsumerState<TrackMetadataScreen> {
               SnackBar(
                 content: Text(
                   context.l10n.trackSaveFailed(
-                    'Failed to write back to storage',
+                    context.l10n.snackbarFailedToWriteStorage,
                   ),
                 ),
               ),
@@ -2873,7 +2873,7 @@ class _TrackMetadataScreenState extends ConsumerState<TrackMetadataScreen> {
 
     // Show loading indicator
     ScaffoldMessenger.of(context).showSnackBar(
-      const SnackBar(content: Text('Loading CUE sheet...')),
+      SnackBar(content: Text(context.l10n.snackbarLoadingCueSheet)),
     );
 
     try {
@@ -3644,7 +3644,7 @@ class _TrackMetadataScreenState extends ConsumerState<TrackMetadataScreen> {
 
     if (saved == true && mounted) {
       ScaffoldMessenger.of(this.context).showSnackBar(
-        const SnackBar(content: Text('Metadata saved successfully')),
+        SnackBar(content: Text(this.context.l10n.snackbarMetadataSaved)),
       );
       // Re-read metadata from file to refresh the display
       try {
@@ -4066,7 +4066,7 @@ class _EditMetadataSheetState extends State<_EditMetadataSheet> {
       if (!mounted) return;
       ScaffoldMessenger.of(
         context,
-      ).showSnackBar(SnackBar(content: Text('Failed to pick cover: $e')));
+      ).showSnackBar(SnackBar(content: Text(context.l10n.snackbarError(e.toString()))));
     }
   }
 
@@ -4290,7 +4290,7 @@ class _EditMetadataSheetState extends State<_EditMetadataSheet> {
       if (mounted) {
         ScaffoldMessenger.of(
           context,
-        ).showSnackBar(SnackBar(content: Text('Failed to save metadata: $e')));
+        ).showSnackBar(SnackBar(content: Text(context.l10n.snackbarError(e.toString()))));
       }
     } finally {
       if (mounted) setState(() => _saving = false);