fix(queue): clarify and coalesce verification progress

lib/l10n/app_localizations.dart

@@ -6694,6 +6694,36 @@ abstract class AppLocalizations {
   /// **'Starting...'**
   String get queueDownloadStarting;
 
+  /// No description provided for @queueCheckingDownloadSession.
+  ///
+  /// In en, this message translates to:
+  /// **'Checking download session...'**
+  String get queueCheckingDownloadSession;
+
+  /// No description provided for @queueResolvingDownloadMetadata.
+  ///
+  /// In en, this message translates to:
+  /// **'Resolving track metadata...'**
+  String get queueResolvingDownloadMetadata;
+
+  /// No description provided for @queueResolvingDownloadStream.
+  ///
+  /// In en, this message translates to:
+  /// **'Preparing audio stream...'**
+  String get queueResolvingDownloadStream;
+
+  /// No description provided for @queueWaitingForVerification.
+  ///
+  /// In en, this message translates to:
+  /// **'Waiting for verification...'**
+  String get queueWaitingForVerification;
+
+  /// No description provided for @queueResumingAfterVerification.
+  ///
+  /// In en, this message translates to:
+  /// **'Resuming after verification...'**
+  String get queueResumingAfterVerification;
+
   /// Accessibility label for selecting a track
   ///
   /// In en, this message translates to:

lib/l10n/app_localizations_ar.dart

@@ -4075,6 +4075,21 @@ class AppLocalizationsAr extends AppLocalizations {
   @override
   String get queueDownloadStarting => 'Starting...';
 
+  @override
+  String get queueCheckingDownloadSession => 'Checking download session...';
+
+  @override
+  String get queueResolvingDownloadMetadata => 'Resolving track metadata...';
+
+  @override
+  String get queueResolvingDownloadStream => 'Preparing audio stream...';
+
+  @override
+  String get queueWaitingForVerification => 'Waiting for verification...';
+
+  @override
+  String get queueResumingAfterVerification => 'Resuming after verification...';
+
   @override
   String get a11ySelectTrack => 'Select track';
 

lib/l10n/app_localizations_de.dart

@@ -4120,6 +4120,21 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get queueDownloadStarting => 'Starte...';
 
+  @override
+  String get queueCheckingDownloadSession => 'Checking download session...';
+
+  @override
+  String get queueResolvingDownloadMetadata => 'Resolving track metadata...';
+
+  @override
+  String get queueResolvingDownloadStream => 'Preparing audio stream...';
+
+  @override
+  String get queueWaitingForVerification => 'Waiting for verification...';
+
+  @override
+  String get queueResumingAfterVerification => 'Resuming after verification...';
+
   @override
   String get a11ySelectTrack => 'Titel auswählen';
 

lib/l10n/app_localizations_en.dart

@@ -4075,6 +4075,21 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get queueDownloadStarting => 'Starting...';
 
+  @override
+  String get queueCheckingDownloadSession => 'Checking download session...';
+
+  @override
+  String get queueResolvingDownloadMetadata => 'Resolving track metadata...';
+
+  @override
+  String get queueResolvingDownloadStream => 'Preparing audio stream...';
+
+  @override
+  String get queueWaitingForVerification => 'Waiting for verification...';
+
+  @override
+  String get queueResumingAfterVerification => 'Resuming after verification...';
+
   @override
   String get a11ySelectTrack => 'Select track';
 

lib/l10n/app_localizations_es.dart

@@ -4069,6 +4069,21 @@ class AppLocalizationsEs extends AppLocalizations {
   @override
   String get queueDownloadStarting => 'Starting...';
 
+  @override
+  String get queueCheckingDownloadSession => 'Checking download session...';
+
+  @override
+  String get queueResolvingDownloadMetadata => 'Resolving track metadata...';
+
+  @override
+  String get queueResolvingDownloadStream => 'Preparing audio stream...';
+
+  @override
+  String get queueWaitingForVerification => 'Waiting for verification...';
+
+  @override
+  String get queueResumingAfterVerification => 'Resuming after verification...';
+
   @override
   String get a11ySelectTrack => 'Select track';
 

lib/l10n/app_localizations_fr.dart

@@ -4181,6 +4181,21 @@ class AppLocalizationsFr extends AppLocalizations {
   @override
   String get queueDownloadStarting => 'C\'est parti...';
 
+  @override
+  String get queueCheckingDownloadSession => 'Checking download session...';
+
+  @override
+  String get queueResolvingDownloadMetadata => 'Resolving track metadata...';
+
+  @override
+  String get queueResolvingDownloadStream => 'Preparing audio stream...';
+
+  @override
+  String get queueWaitingForVerification => 'Waiting for verification...';
+
+  @override
+  String get queueResumingAfterVerification => 'Resuming after verification...';
+
   @override
   String get a11ySelectTrack => 'Sélectionner une piste';
 

lib/l10n/app_localizations_hi.dart

@@ -4075,6 +4075,21 @@ class AppLocalizationsHi extends AppLocalizations {
   @override
   String get queueDownloadStarting => 'Starting...';
 
+  @override
+  String get queueCheckingDownloadSession => 'Checking download session...';
+
+  @override
+  String get queueResolvingDownloadMetadata => 'Resolving track metadata...';
+
+  @override
+  String get queueResolvingDownloadStream => 'Preparing audio stream...';
+
+  @override
+  String get queueWaitingForVerification => 'Waiting for verification...';
+
+  @override
+  String get queueResumingAfterVerification => 'Resuming after verification...';
+
   @override
   String get a11ySelectTrack => 'Select track';
 

lib/l10n/app_localizations_id.dart

@@ -4078,6 +4078,22 @@ class AppLocalizationsId extends AppLocalizations {
   @override
   String get queueDownloadStarting => 'Starting...';
 
+  @override
+  String get queueCheckingDownloadSession => 'Memeriksa sesi unduhan...';
+
+  @override
+  String get queueResolvingDownloadMetadata => 'Mencari metadata lagu...';
+
+  @override
+  String get queueResolvingDownloadStream => 'Menyiapkan stream audio...';
+
+  @override
+  String get queueWaitingForVerification => 'Menunggu verifikasi...';
+
+  @override
+  String get queueResumingAfterVerification =>
+      'Melanjutkan setelah verifikasi...';
+
   @override
   String get a11ySelectTrack => 'Select track';
 

lib/l10n/app_localizations_ja.dart

@@ -4064,6 +4064,21 @@ class AppLocalizationsJa extends AppLocalizations {
   @override
   String get queueDownloadStarting => 'Starting...';
 
+  @override
+  String get queueCheckingDownloadSession => 'Checking download session...';
+
+  @override
+  String get queueResolvingDownloadMetadata => 'Resolving track metadata...';
+
+  @override
+  String get queueResolvingDownloadStream => 'Preparing audio stream...';
+
+  @override
+  String get queueWaitingForVerification => 'Waiting for verification...';
+
+  @override
+  String get queueResumingAfterVerification => 'Resuming after verification...';
+
   @override
   String get a11ySelectTrack => 'Select track';
 

lib/l10n/app_localizations_ko.dart

@@ -3954,6 +3954,21 @@ class AppLocalizationsKo extends AppLocalizations {
   @override
   String get queueDownloadStarting => '시작하는 중...';
 
+  @override
+  String get queueCheckingDownloadSession => 'Checking download session...';
+
+  @override
+  String get queueResolvingDownloadMetadata => 'Resolving track metadata...';
+
+  @override
+  String get queueResolvingDownloadStream => 'Preparing audio stream...';
+
+  @override
+  String get queueWaitingForVerification => 'Waiting for verification...';
+
+  @override
+  String get queueResumingAfterVerification => 'Resuming after verification...';
+
   @override
   String get a11ySelectTrack => '트랙 선택';
 

lib/l10n/app_localizations_nl.dart

@@ -4075,6 +4075,21 @@ class AppLocalizationsNl extends AppLocalizations {
   @override
   String get queueDownloadStarting => 'Starting...';
 
+  @override
+  String get queueCheckingDownloadSession => 'Checking download session...';
+
+  @override
+  String get queueResolvingDownloadMetadata => 'Resolving track metadata...';
+
+  @override
+  String get queueResolvingDownloadStream => 'Preparing audio stream...';
+
+  @override
+  String get queueWaitingForVerification => 'Waiting for verification...';
+
+  @override
+  String get queueResumingAfterVerification => 'Resuming after verification...';
+
   @override
   String get a11ySelectTrack => 'Select track';
 

lib/l10n/app_localizations_pt.dart

@@ -4069,6 +4069,21 @@ class AppLocalizationsPt extends AppLocalizations {
   @override
   String get queueDownloadStarting => 'Starting...';
 
+  @override
+  String get queueCheckingDownloadSession => 'Checking download session...';
+
+  @override
+  String get queueResolvingDownloadMetadata => 'Resolving track metadata...';
+
+  @override
+  String get queueResolvingDownloadStream => 'Preparing audio stream...';
+
+  @override
+  String get queueWaitingForVerification => 'Waiting for verification...';
+
+  @override
+  String get queueResumingAfterVerification => 'Resuming after verification...';
+
   @override
   String get a11ySelectTrack => 'Select track';
 

lib/l10n/app_localizations_ru.dart

@@ -4106,6 +4106,21 @@ class AppLocalizationsRu extends AppLocalizations {
   @override
   String get queueDownloadStarting => 'Starting...';
 
+  @override
+  String get queueCheckingDownloadSession => 'Checking download session...';
+
+  @override
+  String get queueResolvingDownloadMetadata => 'Resolving track metadata...';
+
+  @override
+  String get queueResolvingDownloadStream => 'Preparing audio stream...';
+
+  @override
+  String get queueWaitingForVerification => 'Waiting for verification...';
+
+  @override
+  String get queueResumingAfterVerification => 'Resuming after verification...';
+
   @override
   String get a11ySelectTrack => 'Select track';
 

lib/l10n/app_localizations_tr.dart

@@ -4105,6 +4105,21 @@ class AppLocalizationsTr extends AppLocalizations {
   @override
   String get queueDownloadStarting => 'Starting...';
 
+  @override
+  String get queueCheckingDownloadSession => 'Checking download session...';
+
+  @override
+  String get queueResolvingDownloadMetadata => 'Resolving track metadata...';
+
+  @override
+  String get queueResolvingDownloadStream => 'Preparing audio stream...';
+
+  @override
+  String get queueWaitingForVerification => 'Waiting for verification...';
+
+  @override
+  String get queueResumingAfterVerification => 'Resuming after verification...';
+
   @override
   String get a11ySelectTrack => 'Select track';
 

lib/l10n/app_localizations_uk.dart

@@ -4123,6 +4123,21 @@ class AppLocalizationsUk extends AppLocalizations {
   @override
   String get queueDownloadStarting => 'Starting...';
 
+  @override
+  String get queueCheckingDownloadSession => 'Checking download session...';
+
+  @override
+  String get queueResolvingDownloadMetadata => 'Resolving track metadata...';
+
+  @override
+  String get queueResolvingDownloadStream => 'Preparing audio stream...';
+
+  @override
+  String get queueWaitingForVerification => 'Waiting for verification...';
+
+  @override
+  String get queueResumingAfterVerification => 'Resuming after verification...';
+
   @override
   String get a11ySelectTrack => 'Select track';
 

lib/l10n/app_localizations_zh.dart

@@ -4069,6 +4069,21 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get queueDownloadStarting => 'Starting...';
 
+  @override
+  String get queueCheckingDownloadSession => 'Checking download session...';
+
+  @override
+  String get queueResolvingDownloadMetadata => 'Resolving track metadata...';
+
+  @override
+  String get queueResolvingDownloadStream => 'Preparing audio stream...';
+
+  @override
+  String get queueWaitingForVerification => 'Waiting for verification...';
+
+  @override
+  String get queueResumingAfterVerification => 'Resuming after verification...';
+
   @override
   String get a11ySelectTrack => 'Select track';
 

lib/l10n/arb/app_en.arb

@@ -5268,6 +5268,11 @@
     }
   },
   "queueDownloadStarting": "Starting...",
+  "queueCheckingDownloadSession": "Checking download session...",
+  "queueResolvingDownloadMetadata": "Resolving track metadata...",
+  "queueResolvingDownloadStream": "Preparing audio stream...",
+  "queueWaitingForVerification": "Waiting for verification...",
+  "queueResumingAfterVerification": "Resuming after verification...",
   "@queueDownloadStarting": {
     "description": "Queue status before download progress is available"
   },

lib/l10n/arb/app_id.arb

@@ -5307,6 +5307,11 @@
   "extensionHealthServiceUnknown": "Service status unknown",
   "navHome": "Beranda",
   "queueDownloadStarting": "Starting...",
+  "queueCheckingDownloadSession": "Memeriksa sesi unduhan...",
+  "queueResolvingDownloadMetadata": "Mencari metadata lagu...",
+  "queueResolvingDownloadStream": "Menyiapkan stream audio...",
+  "queueWaitingForVerification": "Menunggu verifikasi...",
+  "queueResumingAfterVerification": "Melanjutkan setelah verifikasi...",
   "@dialogRemoveExtension": {
     "description": "Dialog title - uninstall extension"
   },

lib/models/download_item.dart

@@ -34,6 +34,7 @@ class DownloadItem {
   final String? filePath;
   final String? error;
   final DownloadErrorType? errorType;
+  final String preparationStage;
   final DateTime createdAt;
   final String? qualityOverride;
   final String? playlistName;
@@ -53,6 +54,7 @@ class DownloadItem {
     this.filePath,
     this.error,
     this.errorType,
+    this.preparationStage = '',
     required this.createdAt,
     this.qualityOverride,
     this.playlistName,
@@ -73,6 +75,7 @@ class DownloadItem {
     String? filePath,
     String? error,
     DownloadErrorType? errorType,
+    String? preparationStage,
     DateTime? createdAt,
     String? qualityOverride,
     String? playlistName,
@@ -92,6 +95,7 @@ class DownloadItem {
       filePath: filePath ?? this.filePath,
       error: error ?? this.error,
       errorType: errorType ?? this.errorType,
+      preparationStage: preparationStage ?? this.preparationStage,
       createdAt: createdAt ?? this.createdAt,
       qualityOverride: qualityOverride ?? this.qualityOverride,
       playlistName: playlistName ?? this.playlistName,

lib/models/download_item.g.dart

@@ -20,6 +20,7 @@ DownloadItem _$DownloadItemFromJson(Map<String, dynamic> json) => DownloadItem(
   filePath: json['filePath'] as String?,
   error: json['error'] as String?,
   errorType: $enumDecodeNullable(_$DownloadErrorTypeEnumMap, json['errorType']),
+  preparationStage: json['preparationStage'] as String? ?? '',
   createdAt: DateTime.parse(json['createdAt'] as String),
   qualityOverride: json['qualityOverride'] as String?,
   playlistName: json['playlistName'] as String?,
@@ -41,6 +42,7 @@ Map<String, dynamic> _$DownloadItemToJson(DownloadItem instance) =>
       'filePath': instance.filePath,
       'error': instance.error,
       'errorType': _$DownloadErrorTypeEnumMap[instance.errorType],
+      'preparationStage': instance.preparationStage,
       'createdAt': instance.createdAt.toIso8601String(),
       'qualityOverride': instance.qualityOverride,
       'playlistName': instance.playlistName,

lib/providers/download_queue_provider.dart

@@ -145,6 +145,7 @@ class _ProgressUpdate {
   final double? speedMBps;
   final int? bytesReceived;
   final int? bytesTotal;
+  final String preparationStage;
 
   const _ProgressUpdate({
     required this.status,
@@ -152,6 +153,7 @@ class _ProgressUpdate {
     this.speedMBps,
     this.bytesReceived,
     this.bytesTotal,
+    this.preparationStage = '',
   });
 }
 
@@ -224,6 +226,7 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
   final Set<String> _locallyCancelledItemIds = {};
   final Set<String> _pausePendingItemIds = {};
   final Set<String> _verificationRetriedItemIds = {};
+  final Map<String, Future<bool>> _verificationFlowsByExtension = {};
   final Set<String> _rateLimitRetriedItemIds = {};
   String? _activeNativeWorkerRunId;
 
@@ -412,21 +415,42 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
   }
 
   Future<bool> _openVerificationAndWait(String extensionId) {
-    return openVerificationAndAwaitGrant(
-      extensionId,
-      browserMode: ref.read(settingsProvider).extensionVerificationBrowserMode,
-      awaitForeground: (normalizedExtensionId) async {
-        if (WidgetsBinding.instance.lifecycleState !=
-            AppLifecycleState.resumed) {
-          _log.i(
-            'Verification required for $normalizedExtensionId while app is in '
-            'background; deferring challenge until the app is foregrounded',
-          );
-          unawaited(_notificationService.showVerificationRequired());
-          await _waitForForeground();
-        }
-      },
-    );
+    final key = extensionId.trim().toLowerCase();
+    final activeFlow = _verificationFlowsByExtension[key];
+    if (activeFlow != null) {
+      _log.i(
+        'Joining active verification flow for $extensionId instead of opening another challenge',
+      );
+      return activeFlow;
+    }
+
+    final flow = _runVerificationFlow(extensionId, key);
+    _verificationFlowsByExtension[key] = flow;
+    return flow;
+  }
+
+  Future<bool> _runVerificationFlow(String extensionId, String key) async {
+    try {
+      return await openVerificationAndAwaitGrant(
+        extensionId,
+        browserMode: ref
+            .read(settingsProvider)
+            .extensionVerificationBrowserMode,
+        awaitForeground: (normalizedExtensionId) async {
+          if (WidgetsBinding.instance.lifecycleState !=
+              AppLifecycleState.resumed) {
+            _log.i(
+              'Verification required for $normalizedExtensionId while app is in '
+              'background; deferring challenge until the app is foregrounded',
+            );
+            unawaited(_notificationService.showVerificationRequired());
+            await _waitForForeground();
+          }
+        },
+      );
+    } finally {
+      _verificationFlowsByExtension.remove(key);
+    }
   }
 
   Future<bool> _handleVerificationRequiredDownload(
@@ -727,12 +751,13 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
       }
 
       if (status == 'preparing') {
-        progressUpdates[itemId] = const _ProgressUpdate(
+        progressUpdates[itemId] = _ProgressUpdate(
           status: DownloadStatus.downloading,
           progress: 0.0,
           speedMBps: 0,
           bytesReceived: 0,
           bytesTotal: 0,
+          preparationStage: itemProgress['stage']?.toString() ?? '',
         );
 
         if (LogBuffer.loggingEnabled) {
@@ -801,12 +826,14 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
           speedMBps: update.speedMBps ?? current.speedMBps,
           bytesReceived: update.bytesReceived ?? current.bytesReceived,
           bytesTotal: update.bytesTotal ?? current.bytesTotal,
+          preparationStage: update.preparationStage,
         );
         if (current.status != next.status ||
             current.progress != next.progress ||
             current.speedMBps != next.speedMBps ||
             current.bytesReceived != next.bytesReceived ||
-            current.bytesTotal != next.bytesTotal) {
+            current.bytesTotal != next.bytesTotal ||
+            current.preparationStage != next.preparationStage) {
           if (!changed) {
             updatedItems = List<DownloadItem>.from(updatedItems);
             changed = true;

lib/screens/queue_tab.dart

@@ -93,6 +93,21 @@ String _formatDownloadProgressLabel(BuildContext context, DownloadItem item) {
     );
   }
 
+  if (item.error == 'Waiting for verification') {
+    return context.l10n.queueWaitingForVerification;
+  }
+  switch (item.preparationStage) {
+    case 'checking_session':
+      return context.l10n.queueCheckingDownloadSession;
+    case 'resolving_metadata':
+      return context.l10n.queueResolvingDownloadMetadata;
+    case 'resolving_stream':
+      return context.l10n.queueResolvingDownloadStream;
+  }
+  if (item.error == 'Retrying after verification') {
+    return context.l10n.queueResumingAfterVerification;
+  }
+
   return context.l10n.queueDownloadStarting;
 }