fix: normalize DEFAULT quality to prevent Tidal/Qobuz API failures

go_backend/qobuz.go

@@ -2259,7 +2259,7 @@ func downloadFromQobuz(req DownloadRequest) (QobuzDownloadResult, error) {
 		qobuzQuality = "6"
 	case "HI_RES":
 		qobuzQuality = "7"
-	case "HI_RES_LOSSLESS":
+	case "HI_RES_LOSSLESS", "", "DEFAULT":
 		qobuzQuality = "27"
 	}
 	GoLog("[Qobuz] Using quality: %s (mapped from %s)\n", qobuzQuality, req.Quality)

go_backend/tidal.go

@@ -2212,7 +2212,7 @@ func downloadFromTidal(req DownloadRequest) (TidalDownloadResult, error) {
 	}
 
 	quality := req.Quality
-	if quality == "" {
+	if quality == "" || quality == "DEFAULT" {
 		quality = "LOSSLESS"
 	}
 

lib/providers/download_queue_provider.dart

@@ -3802,6 +3802,7 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
       );
 
       var quality = item.qualityOverride ?? state.audioQuality;
+      if (quality == 'DEFAULT') quality = state.audioQuality;
       final isSafMode = _isSafMode(settings);
       final relativeOutputDir = isSafMode
           ? await _buildRelativeOutputDir(