fix(native-worker): harden background queue handling

lib/providers/download_queue_provider.dart

@@ -241,6 +241,8 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
   final Map<String, Future<bool>> _verificationFlowsByExtension = {};
   final Set<String> _rateLimitRetriedItemIds = {};
   String? _activeNativeWorkerRunId;
+  bool get _hasActiveAndroidNativeWorker =>
+      Platform.isAndroid && _activeNativeWorkerRunId?.isNotEmpty == true;
 
   // Album ReplayGain accumulator: keyed by album identifier.
   // Stores per-track loudness data until all album tracks are done,
@@ -1564,8 +1566,7 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
     }
 
     state = state.copyWith(items: [], isPaused: false, currentDownload: null);
-    if (Platform.isAndroid &&
-        ref.read(settingsProvider).nativeDownloadWorkerEnabled) {
+    if (_hasActiveAndroidNativeWorker) {
       PlatformBridge.cancelNativeDownloadWorker().catchError((_) {});
     }
     _notificationService.cancelDownloadNotification();
@@ -1579,8 +1580,7 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
 
   void pauseQueue() {
     if (state.isProcessing && !state.isPaused) {
-      if (Platform.isAndroid &&
-          ref.read(settingsProvider).nativeDownloadWorkerEnabled) {
+      if (_hasActiveAndroidNativeWorker) {
         PlatformBridge.pauseNativeDownloadWorker().catchError((_) {});
       }
       final activeIds = state.items
@@ -1608,8 +1608,7 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
 
   void resumeQueue() {
     if (state.isPaused) {
-      if (Platform.isAndroid &&
-          ref.read(settingsProvider).nativeDownloadWorkerEnabled) {
+      if (_hasActiveAndroidNativeWorker) {
         PlatformBridge.resumeNativeDownloadWorker().catchError((_) {});
       }
       state = state.copyWith(isPaused: false);

lib/providers/download_queue_provider_native_worker.dart

@@ -424,6 +424,7 @@ extension _DownloadQueueNativeWorker on DownloadQueueNotifier {
           await Future<void>.delayed(const Duration(seconds: 1));
           continue;
         }
+        state = state.copyWith(isPaused: snapshot['is_paused'] == true);
         await _rebuildPendingNativeWorkerContexts(
           contexts,
           pendingContextIds,
@@ -522,6 +523,7 @@ extension _DownloadQueueNativeWorker on DownloadQueueNotifier {
           'run_id': runId,
           'created_at': DateTime.now().toIso8601String(),
           'save_download_history': settings.saveDownloadHistory,
+          'download_network_mode': settings.downloadNetworkMode,
         },
       );
 
@@ -604,13 +606,6 @@ extension _DownloadQueueNativeWorker on DownloadQueueNotifier {
       }
     }
 
-    if (_totalQueuedAtStart > 0) {
-      await _notificationService.showQueueComplete(
-        completedCount: _completedInSession,
-        failedCount: _failedInSession,
-      );
-    }
-
     final hasQueuedItems = state.items.any(
       (item) => item.status == DownloadStatus.queued,
     );
@@ -975,13 +970,6 @@ extension _DownloadQueueNativeWorker on DownloadQueueNotifier {
           );
         },
       );
-      await _notificationService.showDownloadComplete(
-        trackName: item.track.name,
-        artistName: item.track.artistName,
-        completedCount: _completedInSession,
-        totalCount: _totalQueuedAtStart,
-        alreadyInLibrary: result['already_exists'] == true,
-      );
       removeItem(item.id);
       return;
     }
@@ -1221,14 +1209,6 @@ extension _DownloadQueueNativeWorker on DownloadQueueNotifier {
         );
       },
     );
-    await _notificationService.showDownloadComplete(
-      trackName: item.track.name,
-      artistName: item.track.artistName,
-      completedCount: _completedInSession,
-      totalCount: _totalQueuedAtStart,
-      alreadyInLibrary: result['already_exists'] == true,
-    );
-
     removeItem(item.id);
   }