feat: add Opus 320kbps quality, remove Tidal HIGH tier

- Add YouTubeQualityOpus320 constant and opus_320 parser case in Go backend
- Expand opus supported bitrates to [128, 256, 320] across Go, Dart settings, and UI
- Update default YouTube Opus option from 256 to 320kbps
- Remove Tidal HIGH (lossy 320kbps) quality from Go backend, settings model,
  settings provider, download queue provider (both SAF and non-SAF paths),
  settings UI (quality option, format picker, helper methods), and l10n keys
- Add settings migration v6: auto-migrate users with audioQuality=HIGH to LOSSLESS
- Update and add Go test cases for opus_320 and adjusted max bitrate
- Regenerate l10n files, remove 10 unused downloadLossy* l10n keys

lib/l10n/app_localizations.dart

@@ -3838,6 +3838,36 @@ abstract class AppLocalizations {
   /// **'FFmpeg metadata embed failed'**
   String get trackReEnrichFfmpegFailed;
 
+  /// Action/button label for queueing FLAC redownloads for local tracks
+  ///
+  /// In en, this message translates to:
+  /// **'Queue FLAC'**
+  String get queueFlacAction;
+
+  /// Confirmation dialog body before queueing FLAC redownloads for local tracks
+  ///
+  /// In en, this message translates to:
+  /// **'Search online matches for the selected tracks and queue FLAC downloads.\n\nExisting files will not be modified or deleted.\n\nOnly high-confidence matches are queued automatically.\n\n{count} selected'**
+  String queueFlacConfirmMessage(int count);
+
+  /// Snackbar while resolving remote matches for local FLAC redownloads
+  ///
+  /// In en, this message translates to:
+  /// **'Finding FLAC matches... ({current}/{total})'**
+  String queueFlacFindingProgress(int current, int total);
+
+  /// Snackbar when no safe FLAC redownload matches were found
+  ///
+  /// In en, this message translates to:
+  /// **'No reliable online matches found for the selection'**
+  String get queueFlacNoReliableMatches;
+
+  /// Snackbar when some selected local tracks were queued for FLAC redownload and some were skipped
+  ///
+  /// In en, this message translates to:
+  /// **'Added {addedCount} tracks to queue, skipped {skippedCount}'**
+  String queueFlacQueuedWithSkipped(int addedCount, int skippedCount);
+
   /// Snackbar when save operation fails
   ///
   /// In en, this message translates to:
@@ -4602,18 +4632,6 @@ abstract class AppLocalizations {
   /// **'Select a built-in service to enable'**
   String get downloadSelectServiceToEnable;
 
-  /// Quality option label for Tidal lossy 320kbps
-  ///
-  /// In en, this message translates to:
-  /// **'Lossy 320kbps'**
-  String get downloadLossy320;
-
-  /// Setting title to pick output format for Tidal lossy downloads
-  ///
-  /// In en, this message translates to:
-  /// **'Lossy Format'**
-  String get downloadLossyFormat;
-
   /// Info hint when non-Tidal/Qobuz service is selected
   ///
   /// In en, this message translates to:
@@ -4740,54 +4758,6 @@ abstract class AppLocalizations {
   /// **'Auto'**
   String get downloadMusixmatchAuto;
 
-  /// Title of the Tidal lossy format picker bottom sheet
-  ///
-  /// In en, this message translates to:
-  /// **'Lossy 320kbps Format'**
-  String get downloadLossy320Format;
-
-  /// Description in the Tidal lossy format picker
-  ///
-  /// In en, this message translates to:
-  /// **'Choose the output format for Tidal 320kbps lossy downloads. The original AAC stream will be converted to your selected format.'**
-  String get downloadLossy320FormatDesc;
-
-  /// Tidal lossy format option - MP3 320kbps
-  ///
-  /// In en, this message translates to:
-  /// **'MP3 320kbps'**
-  String get downloadLossyMp3;
-
-  /// Subtitle for MP3 320kbps option
-  ///
-  /// In en, this message translates to:
-  /// **'Best compatibility, ~10MB per track'**
-  String get downloadLossyMp3Subtitle;
-
-  /// Tidal lossy format option - Opus 256kbps
-  ///
-  /// In en, this message translates to:
-  /// **'Opus 256kbps'**
-  String get downloadLossyOpus256;
-
-  /// Subtitle for Opus 256kbps option
-  ///
-  /// In en, this message translates to:
-  /// **'Best quality Opus, ~8MB per track'**
-  String get downloadLossyOpus256Subtitle;
-
-  /// Tidal lossy format option - Opus 128kbps
-  ///
-  /// In en, this message translates to:
-  /// **'Opus 128kbps'**
-  String get downloadLossyOpus128;
-
-  /// Subtitle for Opus 128kbps option
-  ///
-  /// In en, this message translates to:
-  /// **'Smallest size, ~4MB per track'**
-  String get downloadLossyOpus128Subtitle;
-
   /// Subtitle for 'Any' network mode option
   ///
   /// In en, this message translates to:

lib/l10n/app_localizations_de.dart

@@ -2172,6 +2172,28 @@ class AppLocalizationsDe extends AppLocalizations {
   String get trackReEnrichFfmpegFailed =>
       'FFmpeg Metadaten-Einbettung fehlgeschlagen';
 
+  @override
+  String get queueFlacAction => 'Queue FLAC';
+
+  @override
+  String queueFlacConfirmMessage(int count) {
+    return 'Search online matches for the selected tracks and queue FLAC downloads.\n\nExisting files will not be modified or deleted.\n\nOnly high-confidence matches are queued automatically.\n\n$count selected';
+  }
+
+  @override
+  String queueFlacFindingProgress(int current, int total) {
+    return 'Finding FLAC matches... ($current/$total)';
+  }
+
+  @override
+  String get queueFlacNoReliableMatches =>
+      'No reliable online matches found for the selection';
+
+  @override
+  String queueFlacQueuedWithSkipped(int addedCount, int skippedCount) {
+    return 'Added $addedCount tracks to queue, skipped $skippedCount';
+  }
+
   @override
   String trackSaveFailed(String error) {
     return 'Fehler: $error';
@@ -2666,12 +2688,6 @@ class AppLocalizationsDe extends AppLocalizations {
   String get downloadSelectServiceToEnable =>
       'Select a built-in service to enable';
 
-  @override
-  String get downloadLossy320 => 'Lossy 320kbps';
-
-  @override
-  String get downloadLossyFormat => 'Lossy Format';
-
   @override
   String get downloadSelectTidalQobuz =>
       'Select Tidal or Qobuz above to configure quality';
@@ -2748,32 +2764,6 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get downloadMusixmatchAuto => 'Auto';
 
-  @override
-  String get downloadLossy320Format => 'Lossy 320kbps Format';
-
-  @override
-  String get downloadLossy320FormatDesc =>
-      'Choose the output format for Tidal 320kbps lossy downloads. The original AAC stream will be converted to your selected format.';
-
-  @override
-  String get downloadLossyMp3 => 'MP3 320kbps';
-
-  @override
-  String get downloadLossyMp3Subtitle => 'Best compatibility, ~10MB per track';
-
-  @override
-  String get downloadLossyOpus256 => 'Opus 256kbps';
-
-  @override
-  String get downloadLossyOpus256Subtitle =>
-      'Best quality Opus, ~8MB per track';
-
-  @override
-  String get downloadLossyOpus128 => 'Opus 128kbps';
-
-  @override
-  String get downloadLossyOpus128Subtitle => 'Smallest size, ~4MB per track';
-
   @override
   String get downloadNetworkAnySubtitle => 'WiFi + Mobile Data';
 

lib/l10n/app_localizations_en.dart

@@ -2145,6 +2145,28 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get trackReEnrichFfmpegFailed => 'FFmpeg metadata embed failed';
 
+  @override
+  String get queueFlacAction => 'Queue FLAC';
+
+  @override
+  String queueFlacConfirmMessage(int count) {
+    return 'Search online matches for the selected tracks and queue FLAC downloads.\n\nExisting files will not be modified or deleted.\n\nOnly high-confidence matches are queued automatically.\n\n$count selected';
+  }
+
+  @override
+  String queueFlacFindingProgress(int current, int total) {
+    return 'Finding FLAC matches... ($current/$total)';
+  }
+
+  @override
+  String get queueFlacNoReliableMatches =>
+      'No reliable online matches found for the selection';
+
+  @override
+  String queueFlacQueuedWithSkipped(int addedCount, int skippedCount) {
+    return 'Added $addedCount tracks to queue, skipped $skippedCount';
+  }
+
   @override
   String trackSaveFailed(String error) {
     return 'Failed: $error';
@@ -2638,12 +2660,6 @@ class AppLocalizationsEn extends AppLocalizations {
   String get downloadSelectServiceToEnable =>
       'Select a built-in service to enable';
 
-  @override
-  String get downloadLossy320 => 'Lossy 320kbps';
-
-  @override
-  String get downloadLossyFormat => 'Lossy Format';
-
   @override
   String get downloadSelectTidalQobuz =>
       'Select Tidal or Qobuz above to configure quality';
@@ -2720,32 +2736,6 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get downloadMusixmatchAuto => 'Auto';
 
-  @override
-  String get downloadLossy320Format => 'Lossy 320kbps Format';
-
-  @override
-  String get downloadLossy320FormatDesc =>
-      'Choose the output format for Tidal 320kbps lossy downloads. The original AAC stream will be converted to your selected format.';
-
-  @override
-  String get downloadLossyMp3 => 'MP3 320kbps';
-
-  @override
-  String get downloadLossyMp3Subtitle => 'Best compatibility, ~10MB per track';
-
-  @override
-  String get downloadLossyOpus256 => 'Opus 256kbps';
-
-  @override
-  String get downloadLossyOpus256Subtitle =>
-      'Best quality Opus, ~8MB per track';
-
-  @override
-  String get downloadLossyOpus128 => 'Opus 128kbps';
-
-  @override
-  String get downloadLossyOpus128Subtitle => 'Smallest size, ~4MB per track';
-
   @override
   String get downloadNetworkAnySubtitle => 'WiFi + Mobile Data';
 

lib/l10n/app_localizations_es.dart

@@ -2145,6 +2145,28 @@ class AppLocalizationsEs extends AppLocalizations {
   @override
   String get trackReEnrichFfmpegFailed => 'FFmpeg metadata embed failed';
 
+  @override
+  String get queueFlacAction => 'Queue FLAC';
+
+  @override
+  String queueFlacConfirmMessage(int count) {
+    return 'Search online matches for the selected tracks and queue FLAC downloads.\n\nExisting files will not be modified or deleted.\n\nOnly high-confidence matches are queued automatically.\n\n$count selected';
+  }
+
+  @override
+  String queueFlacFindingProgress(int current, int total) {
+    return 'Finding FLAC matches... ($current/$total)';
+  }
+
+  @override
+  String get queueFlacNoReliableMatches =>
+      'No reliable online matches found for the selection';
+
+  @override
+  String queueFlacQueuedWithSkipped(int addedCount, int skippedCount) {
+    return 'Added $addedCount tracks to queue, skipped $skippedCount';
+  }
+
   @override
   String trackSaveFailed(String error) {
     return 'Failed: $error';
@@ -2638,12 +2660,6 @@ class AppLocalizationsEs extends AppLocalizations {
   String get downloadSelectServiceToEnable =>
       'Select a built-in service to enable';
 
-  @override
-  String get downloadLossy320 => 'Lossy 320kbps';
-
-  @override
-  String get downloadLossyFormat => 'Lossy Format';
-
   @override
   String get downloadSelectTidalQobuz =>
       'Select Tidal or Qobuz above to configure quality';
@@ -2720,32 +2736,6 @@ class AppLocalizationsEs extends AppLocalizations {
   @override
   String get downloadMusixmatchAuto => 'Auto';
 
-  @override
-  String get downloadLossy320Format => 'Lossy 320kbps Format';
-
-  @override
-  String get downloadLossy320FormatDesc =>
-      'Choose the output format for Tidal 320kbps lossy downloads. The original AAC stream will be converted to your selected format.';
-
-  @override
-  String get downloadLossyMp3 => 'MP3 320kbps';
-
-  @override
-  String get downloadLossyMp3Subtitle => 'Best compatibility, ~10MB per track';
-
-  @override
-  String get downloadLossyOpus256 => 'Opus 256kbps';
-
-  @override
-  String get downloadLossyOpus256Subtitle =>
-      'Best quality Opus, ~8MB per track';
-
-  @override
-  String get downloadLossyOpus128 => 'Opus 128kbps';
-
-  @override
-  String get downloadLossyOpus128Subtitle => 'Smallest size, ~4MB per track';
-
   @override
   String get downloadNetworkAnySubtitle => 'WiFi + Mobile Data';
 

lib/l10n/app_localizations_fr.dart

@@ -2147,6 +2147,28 @@ class AppLocalizationsFr extends AppLocalizations {
   @override
   String get trackReEnrichFfmpegFailed => 'FFmpeg metadata embed failed';
 
+  @override
+  String get queueFlacAction => 'Queue FLAC';
+
+  @override
+  String queueFlacConfirmMessage(int count) {
+    return 'Search online matches for the selected tracks and queue FLAC downloads.\n\nExisting files will not be modified or deleted.\n\nOnly high-confidence matches are queued automatically.\n\n$count selected';
+  }
+
+  @override
+  String queueFlacFindingProgress(int current, int total) {
+    return 'Finding FLAC matches... ($current/$total)';
+  }
+
+  @override
+  String get queueFlacNoReliableMatches =>
+      'No reliable online matches found for the selection';
+
+  @override
+  String queueFlacQueuedWithSkipped(int addedCount, int skippedCount) {
+    return 'Added $addedCount tracks to queue, skipped $skippedCount';
+  }
+
   @override
   String trackSaveFailed(String error) {
     return 'Failed: $error';
@@ -2640,12 +2662,6 @@ class AppLocalizationsFr extends AppLocalizations {
   String get downloadSelectServiceToEnable =>
       'Select a built-in service to enable';
 
-  @override
-  String get downloadLossy320 => 'Lossy 320kbps';
-
-  @override
-  String get downloadLossyFormat => 'Lossy Format';
-
   @override
   String get downloadSelectTidalQobuz =>
       'Select Tidal or Qobuz above to configure quality';
@@ -2722,32 +2738,6 @@ class AppLocalizationsFr extends AppLocalizations {
   @override
   String get downloadMusixmatchAuto => 'Auto';
 
-  @override
-  String get downloadLossy320Format => 'Lossy 320kbps Format';
-
-  @override
-  String get downloadLossy320FormatDesc =>
-      'Choose the output format for Tidal 320kbps lossy downloads. The original AAC stream will be converted to your selected format.';
-
-  @override
-  String get downloadLossyMp3 => 'MP3 320kbps';
-
-  @override
-  String get downloadLossyMp3Subtitle => 'Best compatibility, ~10MB per track';
-
-  @override
-  String get downloadLossyOpus256 => 'Opus 256kbps';
-
-  @override
-  String get downloadLossyOpus256Subtitle =>
-      'Best quality Opus, ~8MB per track';
-
-  @override
-  String get downloadLossyOpus128 => 'Opus 128kbps';
-
-  @override
-  String get downloadLossyOpus128Subtitle => 'Smallest size, ~4MB per track';
-
   @override
   String get downloadNetworkAnySubtitle => 'WiFi + Mobile Data';
 

lib/l10n/app_localizations_hi.dart

@@ -2145,6 +2145,28 @@ class AppLocalizationsHi extends AppLocalizations {
   @override
   String get trackReEnrichFfmpegFailed => 'FFmpeg metadata embed failed';
 
+  @override
+  String get queueFlacAction => 'Queue FLAC';
+
+  @override
+  String queueFlacConfirmMessage(int count) {
+    return 'Search online matches for the selected tracks and queue FLAC downloads.\n\nExisting files will not be modified or deleted.\n\nOnly high-confidence matches are queued automatically.\n\n$count selected';
+  }
+
+  @override
+  String queueFlacFindingProgress(int current, int total) {
+    return 'Finding FLAC matches... ($current/$total)';
+  }
+
+  @override
+  String get queueFlacNoReliableMatches =>
+      'No reliable online matches found for the selection';
+
+  @override
+  String queueFlacQueuedWithSkipped(int addedCount, int skippedCount) {
+    return 'Added $addedCount tracks to queue, skipped $skippedCount';
+  }
+
   @override
   String trackSaveFailed(String error) {
     return 'Failed: $error';
@@ -2638,12 +2660,6 @@ class AppLocalizationsHi extends AppLocalizations {
   String get downloadSelectServiceToEnable =>
       'Select a built-in service to enable';
 
-  @override
-  String get downloadLossy320 => 'Lossy 320kbps';
-
-  @override
-  String get downloadLossyFormat => 'Lossy Format';
-
   @override
   String get downloadSelectTidalQobuz =>
       'Select Tidal or Qobuz above to configure quality';
@@ -2720,32 +2736,6 @@ class AppLocalizationsHi extends AppLocalizations {
   @override
   String get downloadMusixmatchAuto => 'Auto';
 
-  @override
-  String get downloadLossy320Format => 'Lossy 320kbps Format';
-
-  @override
-  String get downloadLossy320FormatDesc =>
-      'Choose the output format for Tidal 320kbps lossy downloads. The original AAC stream will be converted to your selected format.';
-
-  @override
-  String get downloadLossyMp3 => 'MP3 320kbps';
-
-  @override
-  String get downloadLossyMp3Subtitle => 'Best compatibility, ~10MB per track';
-
-  @override
-  String get downloadLossyOpus256 => 'Opus 256kbps';
-
-  @override
-  String get downloadLossyOpus256Subtitle =>
-      'Best quality Opus, ~8MB per track';
-
-  @override
-  String get downloadLossyOpus128 => 'Opus 128kbps';
-
-  @override
-  String get downloadLossyOpus128Subtitle => 'Smallest size, ~4MB per track';
-
   @override
   String get downloadNetworkAnySubtitle => 'WiFi + Mobile Data';
 

lib/l10n/app_localizations_id.dart

@@ -2152,6 +2152,28 @@ class AppLocalizationsId extends AppLocalizations {
   @override
   String get trackReEnrichFfmpegFailed => 'FFmpeg metadata embed failed';
 
+  @override
+  String get queueFlacAction => 'Antrekan FLAC';
+
+  @override
+  String queueFlacConfirmMessage(int count) {
+    return 'Cari kecocokan online untuk track yang dipilih lalu antrekan download FLAC.\n\nFile yang sudah ada tidak akan diubah atau dihapus.\n\nHanya kecocokan dengan keyakinan tinggi yang akan diantrikan otomatis.\n\n$count dipilih';
+  }
+
+  @override
+  String queueFlacFindingProgress(int current, int total) {
+    return 'Mencari kecocokan FLAC... ($current/$total)';
+  }
+
+  @override
+  String get queueFlacNoReliableMatches =>
+      'Tidak ada kecocokan online yang cukup meyakinkan untuk pilihan ini';
+
+  @override
+  String queueFlacQueuedWithSkipped(int addedCount, int skippedCount) {
+    return 'Menambahkan $addedCount track ke antrean, melewati $skippedCount';
+  }
+
   @override
   String trackSaveFailed(String error) {
     return 'Failed: $error';
@@ -2645,12 +2667,6 @@ class AppLocalizationsId extends AppLocalizations {
   String get downloadSelectServiceToEnable =>
       'Select a built-in service to enable';
 
-  @override
-  String get downloadLossy320 => 'Lossy 320kbps';
-
-  @override
-  String get downloadLossyFormat => 'Lossy Format';
-
   @override
   String get downloadSelectTidalQobuz =>
       'Select Tidal or Qobuz above to configure quality';
@@ -2727,32 +2743,6 @@ class AppLocalizationsId extends AppLocalizations {
   @override
   String get downloadMusixmatchAuto => 'Auto';
 
-  @override
-  String get downloadLossy320Format => 'Lossy 320kbps Format';
-
-  @override
-  String get downloadLossy320FormatDesc =>
-      'Choose the output format for Tidal 320kbps lossy downloads. The original AAC stream will be converted to your selected format.';
-
-  @override
-  String get downloadLossyMp3 => 'MP3 320kbps';
-
-  @override
-  String get downloadLossyMp3Subtitle => 'Best compatibility, ~10MB per track';
-
-  @override
-  String get downloadLossyOpus256 => 'Opus 256kbps';
-
-  @override
-  String get downloadLossyOpus256Subtitle =>
-      'Best quality Opus, ~8MB per track';
-
-  @override
-  String get downloadLossyOpus128 => 'Opus 128kbps';
-
-  @override
-  String get downloadLossyOpus128Subtitle => 'Smallest size, ~4MB per track';
-
   @override
   String get downloadNetworkAnySubtitle => 'WiFi + Mobile Data';
 

lib/l10n/app_localizations_ja.dart

@@ -2132,6 +2132,28 @@ class AppLocalizationsJa extends AppLocalizations {
   @override
   String get trackReEnrichFfmpegFailed => 'FFmpeg metadata embed failed';
 
+  @override
+  String get queueFlacAction => 'Queue FLAC';
+
+  @override
+  String queueFlacConfirmMessage(int count) {
+    return 'Search online matches for the selected tracks and queue FLAC downloads.\n\nExisting files will not be modified or deleted.\n\nOnly high-confidence matches are queued automatically.\n\n$count selected';
+  }
+
+  @override
+  String queueFlacFindingProgress(int current, int total) {
+    return 'Finding FLAC matches... ($current/$total)';
+  }
+
+  @override
+  String get queueFlacNoReliableMatches =>
+      'No reliable online matches found for the selection';
+
+  @override
+  String queueFlacQueuedWithSkipped(int addedCount, int skippedCount) {
+    return 'Added $addedCount tracks to queue, skipped $skippedCount';
+  }
+
   @override
   String trackSaveFailed(String error) {
     return '失敗: $error';
@@ -2625,12 +2647,6 @@ class AppLocalizationsJa extends AppLocalizations {
   String get downloadSelectServiceToEnable =>
       'Select a built-in service to enable';
 
-  @override
-  String get downloadLossy320 => 'Lossy 320kbps';
-
-  @override
-  String get downloadLossyFormat => 'Lossy Format';
-
   @override
   String get downloadSelectTidalQobuz =>
       'Select Tidal or Qobuz above to configure quality';
@@ -2707,32 +2723,6 @@ class AppLocalizationsJa extends AppLocalizations {
   @override
   String get downloadMusixmatchAuto => 'Auto';
 
-  @override
-  String get downloadLossy320Format => 'Lossy 320kbps Format';
-
-  @override
-  String get downloadLossy320FormatDesc =>
-      'Choose the output format for Tidal 320kbps lossy downloads. The original AAC stream will be converted to your selected format.';
-
-  @override
-  String get downloadLossyMp3 => 'MP3 320kbps';
-
-  @override
-  String get downloadLossyMp3Subtitle => 'Best compatibility, ~10MB per track';
-
-  @override
-  String get downloadLossyOpus256 => 'Opus 256kbps';
-
-  @override
-  String get downloadLossyOpus256Subtitle =>
-      'Best quality Opus, ~8MB per track';
-
-  @override
-  String get downloadLossyOpus128 => 'Opus 128kbps';
-
-  @override
-  String get downloadLossyOpus128Subtitle => 'Smallest size, ~4MB per track';
-
   @override
   String get downloadNetworkAnySubtitle => 'WiFi + Mobile Data';
 

lib/l10n/app_localizations_ko.dart

@@ -2125,6 +2125,28 @@ class AppLocalizationsKo extends AppLocalizations {
   @override
   String get trackReEnrichFfmpegFailed => 'FFmpeg metadata embed failed';
 
+  @override
+  String get queueFlacAction => 'Queue FLAC';
+
+  @override
+  String queueFlacConfirmMessage(int count) {
+    return 'Search online matches for the selected tracks and queue FLAC downloads.\n\nExisting files will not be modified or deleted.\n\nOnly high-confidence matches are queued automatically.\n\n$count selected';
+  }
+
+  @override
+  String queueFlacFindingProgress(int current, int total) {
+    return 'Finding FLAC matches... ($current/$total)';
+  }
+
+  @override
+  String get queueFlacNoReliableMatches =>
+      'No reliable online matches found for the selection';
+
+  @override
+  String queueFlacQueuedWithSkipped(int addedCount, int skippedCount) {
+    return 'Added $addedCount tracks to queue, skipped $skippedCount';
+  }
+
   @override
   String trackSaveFailed(String error) {
     return 'Failed: $error';
@@ -2618,12 +2640,6 @@ class AppLocalizationsKo extends AppLocalizations {
   String get downloadSelectServiceToEnable =>
       'Select a built-in service to enable';
 
-  @override
-  String get downloadLossy320 => 'Lossy 320kbps';
-
-  @override
-  String get downloadLossyFormat => 'Lossy Format';
-
   @override
   String get downloadSelectTidalQobuz =>
       'Select Tidal or Qobuz above to configure quality';
@@ -2700,32 +2716,6 @@ class AppLocalizationsKo extends AppLocalizations {
   @override
   String get downloadMusixmatchAuto => 'Auto';
 
-  @override
-  String get downloadLossy320Format => 'Lossy 320kbps Format';
-
-  @override
-  String get downloadLossy320FormatDesc =>
-      'Choose the output format for Tidal 320kbps lossy downloads. The original AAC stream will be converted to your selected format.';
-
-  @override
-  String get downloadLossyMp3 => 'MP3 320kbps';
-
-  @override
-  String get downloadLossyMp3Subtitle => 'Best compatibility, ~10MB per track';
-
-  @override
-  String get downloadLossyOpus256 => 'Opus 256kbps';
-
-  @override
-  String get downloadLossyOpus256Subtitle =>
-      'Best quality Opus, ~8MB per track';
-
-  @override
-  String get downloadLossyOpus128 => 'Opus 128kbps';
-
-  @override
-  String get downloadLossyOpus128Subtitle => 'Smallest size, ~4MB per track';
-
   @override
   String get downloadNetworkAnySubtitle => 'WiFi + Mobile Data';
 

lib/l10n/app_localizations_nl.dart

@@ -2145,6 +2145,28 @@ class AppLocalizationsNl extends AppLocalizations {
   @override
   String get trackReEnrichFfmpegFailed => 'FFmpeg metadata embed failed';
 
+  @override
+  String get queueFlacAction => 'Queue FLAC';
+
+  @override
+  String queueFlacConfirmMessage(int count) {
+    return 'Search online matches for the selected tracks and queue FLAC downloads.\n\nExisting files will not be modified or deleted.\n\nOnly high-confidence matches are queued automatically.\n\n$count selected';
+  }
+
+  @override
+  String queueFlacFindingProgress(int current, int total) {
+    return 'Finding FLAC matches... ($current/$total)';
+  }
+
+  @override
+  String get queueFlacNoReliableMatches =>
+      'No reliable online matches found for the selection';
+
+  @override
+  String queueFlacQueuedWithSkipped(int addedCount, int skippedCount) {
+    return 'Added $addedCount tracks to queue, skipped $skippedCount';
+  }
+
   @override
   String trackSaveFailed(String error) {
     return 'Failed: $error';
@@ -2638,12 +2660,6 @@ class AppLocalizationsNl extends AppLocalizations {
   String get downloadSelectServiceToEnable =>
       'Select a built-in service to enable';
 
-  @override
-  String get downloadLossy320 => 'Lossy 320kbps';
-
-  @override
-  String get downloadLossyFormat => 'Lossy Format';
-
   @override
   String get downloadSelectTidalQobuz =>
       'Select Tidal or Qobuz above to configure quality';
@@ -2720,32 +2736,6 @@ class AppLocalizationsNl extends AppLocalizations {
   @override
   String get downloadMusixmatchAuto => 'Auto';
 
-  @override
-  String get downloadLossy320Format => 'Lossy 320kbps Format';
-
-  @override
-  String get downloadLossy320FormatDesc =>
-      'Choose the output format for Tidal 320kbps lossy downloads. The original AAC stream will be converted to your selected format.';
-
-  @override
-  String get downloadLossyMp3 => 'MP3 320kbps';
-
-  @override
-  String get downloadLossyMp3Subtitle => 'Best compatibility, ~10MB per track';
-
-  @override
-  String get downloadLossyOpus256 => 'Opus 256kbps';
-
-  @override
-  String get downloadLossyOpus256Subtitle =>
-      'Best quality Opus, ~8MB per track';
-
-  @override
-  String get downloadLossyOpus128 => 'Opus 128kbps';
-
-  @override
-  String get downloadLossyOpus128Subtitle => 'Smallest size, ~4MB per track';
-
   @override
   String get downloadNetworkAnySubtitle => 'WiFi + Mobile Data';
 

lib/l10n/app_localizations_pt.dart

@@ -2145,6 +2145,28 @@ class AppLocalizationsPt extends AppLocalizations {
   @override
   String get trackReEnrichFfmpegFailed => 'FFmpeg metadata embed failed';
 
+  @override
+  String get queueFlacAction => 'Queue FLAC';
+
+  @override
+  String queueFlacConfirmMessage(int count) {
+    return 'Search online matches for the selected tracks and queue FLAC downloads.\n\nExisting files will not be modified or deleted.\n\nOnly high-confidence matches are queued automatically.\n\n$count selected';
+  }
+
+  @override
+  String queueFlacFindingProgress(int current, int total) {
+    return 'Finding FLAC matches... ($current/$total)';
+  }
+
+  @override
+  String get queueFlacNoReliableMatches =>
+      'No reliable online matches found for the selection';
+
+  @override
+  String queueFlacQueuedWithSkipped(int addedCount, int skippedCount) {
+    return 'Added $addedCount tracks to queue, skipped $skippedCount';
+  }
+
   @override
   String trackSaveFailed(String error) {
     return 'Failed: $error';
@@ -2638,12 +2660,6 @@ class AppLocalizationsPt extends AppLocalizations {
   String get downloadSelectServiceToEnable =>
       'Select a built-in service to enable';
 
-  @override
-  String get downloadLossy320 => 'Lossy 320kbps';
-
-  @override
-  String get downloadLossyFormat => 'Lossy Format';
-
   @override
   String get downloadSelectTidalQobuz =>
       'Select Tidal or Qobuz above to configure quality';
@@ -2720,32 +2736,6 @@ class AppLocalizationsPt extends AppLocalizations {
   @override
   String get downloadMusixmatchAuto => 'Auto';
 
-  @override
-  String get downloadLossy320Format => 'Lossy 320kbps Format';
-
-  @override
-  String get downloadLossy320FormatDesc =>
-      'Choose the output format for Tidal 320kbps lossy downloads. The original AAC stream will be converted to your selected format.';
-
-  @override
-  String get downloadLossyMp3 => 'MP3 320kbps';
-
-  @override
-  String get downloadLossyMp3Subtitle => 'Best compatibility, ~10MB per track';
-
-  @override
-  String get downloadLossyOpus256 => 'Opus 256kbps';
-
-  @override
-  String get downloadLossyOpus256Subtitle =>
-      'Best quality Opus, ~8MB per track';
-
-  @override
-  String get downloadLossyOpus128 => 'Opus 128kbps';
-
-  @override
-  String get downloadLossyOpus128Subtitle => 'Smallest size, ~4MB per track';
-
   @override
   String get downloadNetworkAnySubtitle => 'WiFi + Mobile Data';
 

lib/l10n/app_localizations_ru.dart

@@ -2198,6 +2198,28 @@ class AppLocalizationsRu extends AppLocalizations {
   String get trackReEnrichFfmpegFailed =>
       'Ошибка встраивания метаданных FFmpeg';
 
+  @override
+  String get queueFlacAction => 'Queue FLAC';
+
+  @override
+  String queueFlacConfirmMessage(int count) {
+    return 'Search online matches for the selected tracks and queue FLAC downloads.\n\nExisting files will not be modified or deleted.\n\nOnly high-confidence matches are queued automatically.\n\n$count selected';
+  }
+
+  @override
+  String queueFlacFindingProgress(int current, int total) {
+    return 'Finding FLAC matches... ($current/$total)';
+  }
+
+  @override
+  String get queueFlacNoReliableMatches =>
+      'No reliable online matches found for the selection';
+
+  @override
+  String queueFlacQueuedWithSkipped(int addedCount, int skippedCount) {
+    return 'Added $addedCount tracks to queue, skipped $skippedCount';
+  }
+
   @override
   String trackSaveFailed(String error) {
     return 'Ошибка: $error';
@@ -2697,12 +2719,6 @@ class AppLocalizationsRu extends AppLocalizations {
   String get downloadSelectServiceToEnable =>
       'Select a built-in service to enable';
 
-  @override
-  String get downloadLossy320 => 'Lossy 320kbps';
-
-  @override
-  String get downloadLossyFormat => 'Lossy Format';
-
   @override
   String get downloadSelectTidalQobuz =>
       'Select Tidal or Qobuz above to configure quality';
@@ -2779,32 +2795,6 @@ class AppLocalizationsRu extends AppLocalizations {
   @override
   String get downloadMusixmatchAuto => 'Auto';
 
-  @override
-  String get downloadLossy320Format => 'Lossy 320kbps Format';
-
-  @override
-  String get downloadLossy320FormatDesc =>
-      'Choose the output format for Tidal 320kbps lossy downloads. The original AAC stream will be converted to your selected format.';
-
-  @override
-  String get downloadLossyMp3 => 'MP3 320kbps';
-
-  @override
-  String get downloadLossyMp3Subtitle => 'Best compatibility, ~10MB per track';
-
-  @override
-  String get downloadLossyOpus256 => 'Opus 256kbps';
-
-  @override
-  String get downloadLossyOpus256Subtitle =>
-      'Best quality Opus, ~8MB per track';
-
-  @override
-  String get downloadLossyOpus128 => 'Opus 128kbps';
-
-  @override
-  String get downloadLossyOpus128Subtitle => 'Smallest size, ~4MB per track';
-
   @override
   String get downloadNetworkAnySubtitle => 'WiFi + Mobile Data';
 

lib/l10n/app_localizations_tr.dart

@@ -2157,6 +2157,28 @@ class AppLocalizationsTr extends AppLocalizations {
   @override
   String get trackReEnrichFfmpegFailed => 'FFmpeg metadata embed failed';
 
+  @override
+  String get queueFlacAction => 'Queue FLAC';
+
+  @override
+  String queueFlacConfirmMessage(int count) {
+    return 'Search online matches for the selected tracks and queue FLAC downloads.\n\nExisting files will not be modified or deleted.\n\nOnly high-confidence matches are queued automatically.\n\n$count selected';
+  }
+
+  @override
+  String queueFlacFindingProgress(int current, int total) {
+    return 'Finding FLAC matches... ($current/$total)';
+  }
+
+  @override
+  String get queueFlacNoReliableMatches =>
+      'No reliable online matches found for the selection';
+
+  @override
+  String queueFlacQueuedWithSkipped(int addedCount, int skippedCount) {
+    return 'Added $addedCount tracks to queue, skipped $skippedCount';
+  }
+
   @override
   String trackSaveFailed(String error) {
     return 'Failed: $error';
@@ -2650,12 +2672,6 @@ class AppLocalizationsTr extends AppLocalizations {
   String get downloadSelectServiceToEnable =>
       'Select a built-in service to enable';
 
-  @override
-  String get downloadLossy320 => 'Lossy 320kbps';
-
-  @override
-  String get downloadLossyFormat => 'Lossy Format';
-
   @override
   String get downloadSelectTidalQobuz =>
       'Select Tidal or Qobuz above to configure quality';
@@ -2732,32 +2748,6 @@ class AppLocalizationsTr extends AppLocalizations {
   @override
   String get downloadMusixmatchAuto => 'Auto';
 
-  @override
-  String get downloadLossy320Format => 'Lossy 320kbps Format';
-
-  @override
-  String get downloadLossy320FormatDesc =>
-      'Choose the output format for Tidal 320kbps lossy downloads. The original AAC stream will be converted to your selected format.';
-
-  @override
-  String get downloadLossyMp3 => 'MP3 320kbps';
-
-  @override
-  String get downloadLossyMp3Subtitle => 'Best compatibility, ~10MB per track';
-
-  @override
-  String get downloadLossyOpus256 => 'Opus 256kbps';
-
-  @override
-  String get downloadLossyOpus256Subtitle =>
-      'Best quality Opus, ~8MB per track';
-
-  @override
-  String get downloadLossyOpus128 => 'Opus 128kbps';
-
-  @override
-  String get downloadLossyOpus128Subtitle => 'Smallest size, ~4MB per track';
-
   @override
   String get downloadNetworkAnySubtitle => 'WiFi + Mobile Data';
 

lib/l10n/app_localizations_zh.dart

@@ -2145,6 +2145,28 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get trackReEnrichFfmpegFailed => 'FFmpeg metadata embed failed';
 
+  @override
+  String get queueFlacAction => 'Queue FLAC';
+
+  @override
+  String queueFlacConfirmMessage(int count) {
+    return 'Search online matches for the selected tracks and queue FLAC downloads.\n\nExisting files will not be modified or deleted.\n\nOnly high-confidence matches are queued automatically.\n\n$count selected';
+  }
+
+  @override
+  String queueFlacFindingProgress(int current, int total) {
+    return 'Finding FLAC matches... ($current/$total)';
+  }
+
+  @override
+  String get queueFlacNoReliableMatches =>
+      'No reliable online matches found for the selection';
+
+  @override
+  String queueFlacQueuedWithSkipped(int addedCount, int skippedCount) {
+    return 'Added $addedCount tracks to queue, skipped $skippedCount';
+  }
+
   @override
   String trackSaveFailed(String error) {
     return 'Failed: $error';
@@ -2638,12 +2660,6 @@ class AppLocalizationsZh extends AppLocalizations {
   String get downloadSelectServiceToEnable =>
       'Select a built-in service to enable';
 
-  @override
-  String get downloadLossy320 => 'Lossy 320kbps';
-
-  @override
-  String get downloadLossyFormat => 'Lossy Format';
-
   @override
   String get downloadSelectTidalQobuz =>
       'Select Tidal or Qobuz above to configure quality';
@@ -2720,32 +2736,6 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get downloadMusixmatchAuto => 'Auto';
 
-  @override
-  String get downloadLossy320Format => 'Lossy 320kbps Format';
-
-  @override
-  String get downloadLossy320FormatDesc =>
-      'Choose the output format for Tidal 320kbps lossy downloads. The original AAC stream will be converted to your selected format.';
-
-  @override
-  String get downloadLossyMp3 => 'MP3 320kbps';
-
-  @override
-  String get downloadLossyMp3Subtitle => 'Best compatibility, ~10MB per track';
-
-  @override
-  String get downloadLossyOpus256 => 'Opus 256kbps';
-
-  @override
-  String get downloadLossyOpus256Subtitle =>
-      'Best quality Opus, ~8MB per track';
-
-  @override
-  String get downloadLossyOpus128 => 'Opus 128kbps';
-
-  @override
-  String get downloadLossyOpus128Subtitle => 'Smallest size, ~4MB per track';
-
   @override
   String get downloadNetworkAnySubtitle => 'WiFi + Mobile Data';
 

lib/l10n/arb/app_en.arb

@@ -2819,6 +2819,47 @@
   "@trackReEnrichFfmpegFailed": {
     "description": "Snackbar when FFmpeg embed fails for MP3/Opus"
   },
+  "queueFlacAction": "Queue FLAC",
+  "@queueFlacAction": {
+    "description": "Action/button label for queueing FLAC redownloads for local tracks"
+  },
+  "queueFlacConfirmMessage": "Search online matches for the selected tracks and queue FLAC downloads.\n\nExisting files will not be modified or deleted.\n\nOnly high-confidence matches are queued automatically.\n\n{count} selected",
+  "@queueFlacConfirmMessage": {
+    "description": "Confirmation dialog body before queueing FLAC redownloads for local tracks",
+    "placeholders": {
+      "count": {
+        "type": "int"
+      }
+    }
+  },
+  "queueFlacFindingProgress": "Finding FLAC matches... ({current}/{total})",
+  "@queueFlacFindingProgress": {
+    "description": "Snackbar while resolving remote matches for local FLAC redownloads",
+    "placeholders": {
+      "current": {
+        "type": "int"
+      },
+      "total": {
+        "type": "int"
+      }
+    }
+  },
+  "queueFlacNoReliableMatches": "No reliable online matches found for the selection",
+  "@queueFlacNoReliableMatches": {
+    "description": "Snackbar when no safe FLAC redownload matches were found"
+  },
+  "queueFlacQueuedWithSkipped": "Added {addedCount} tracks to queue, skipped {skippedCount}",
+  "@queueFlacQueuedWithSkipped": {
+    "description": "Snackbar when some selected local tracks were queued for FLAC redownload and some were skipped",
+    "placeholders": {
+      "addedCount": {
+        "type": "int"
+      },
+      "skippedCount": {
+        "type": "int"
+      }
+    }
+  },
   "trackSaveFailed": "Failed: {error}",
   "@trackSaveFailed": {
     "description": "Snackbar when save operation fails",
@@ -3513,14 +3554,7 @@
   "@downloadSelectServiceToEnable": {
     "description": "Hint shown instead of Ask-quality subtitle when no built-in service selected"
   },
-  "downloadLossy320": "Lossy 320kbps",
-  "@downloadLossy320": {
-    "description": "Quality option label for Tidal lossy 320kbps"
-  },
-  "downloadLossyFormat": "Lossy Format",
-  "@downloadLossyFormat": {
-    "description": "Setting title to pick output format for Tidal lossy downloads"
-  },
+
   "downloadSelectTidalQobuz": "Select Tidal or Qobuz above to configure quality",
   "@downloadSelectTidalQobuz": {
     "description": "Info hint when non-Tidal/Qobuz service is selected"
@@ -3606,38 +3640,7 @@
   "@downloadMusixmatchAuto": {
     "description": "Button to reset Musixmatch language to automatic"
   },
-  "downloadLossy320Format": "Lossy 320kbps Format",
-  "@downloadLossy320Format": {
-    "description": "Title of the Tidal lossy format picker bottom sheet"
-  },
-  "downloadLossy320FormatDesc": "Choose the output format for Tidal 320kbps lossy downloads. The original AAC stream will be converted to your selected format.",
-  "@downloadLossy320FormatDesc": {
-    "description": "Description in the Tidal lossy format picker"
-  },
-  "downloadLossyMp3": "MP3 320kbps",
-  "@downloadLossyMp3": {
-    "description": "Tidal lossy format option - MP3 320kbps"
-  },
-  "downloadLossyMp3Subtitle": "Best compatibility, ~10MB per track",
-  "@downloadLossyMp3Subtitle": {
-    "description": "Subtitle for MP3 320kbps option"
-  },
-  "downloadLossyOpus256": "Opus 256kbps",
-  "@downloadLossyOpus256": {
-    "description": "Tidal lossy format option - Opus 256kbps"
-  },
-  "downloadLossyOpus256Subtitle": "Best quality Opus, ~8MB per track",
-  "@downloadLossyOpus256Subtitle": {
-    "description": "Subtitle for Opus 256kbps option"
-  },
-  "downloadLossyOpus128": "Opus 128kbps",
-  "@downloadLossyOpus128": {
-    "description": "Tidal lossy format option - Opus 128kbps"
-  },
-  "downloadLossyOpus128Subtitle": "Smallest size, ~4MB per track",
-  "@downloadLossyOpus128Subtitle": {
-    "description": "Subtitle for Opus 128kbps option"
-  },
+
   "downloadNetworkAnySubtitle": "WiFi + Mobile Data",
   "@downloadNetworkAnySubtitle": {
     "description": "Subtitle for 'Any' network mode option"