v3.6.6: fix iOS downloads, metadata fallback, lossy quality display, audio duration accuracy

CHANGELOG.md

@@ -1,5 +1,20 @@
 # Changelog
 
+## [3.6.6] - 2026-02-12
+
+### Fixed
+
+- Fixed downloads not working on iOS - missing `downloadByStrategy` and `downloadFromYouTube` method channel handlers in AppDelegate.swift (added in v3.6.5 for Android but not iOS)
+- Fixed extended metadata (genre, label, copyright) lost during service fallback (e.g. Tidal unavailable, falls back to Qobuz) - Go backend now enriches metadata from Deezer by ISRC before download and preserves it through the fallback chain
+- Fixed local library showing incorrect "16-bit" quality label for lossy formats (MP3, Opus) - now displays actual bitrate (e.g. "MP3 320kbps")
+- Fixed inaccurate Opus/Vorbis duration calculation (e.g. 4:11 showing as 8:44) - now reads granule position from last Ogg page for precise duration
+- Fixed MP3 duration/bitrate inaccuracy for VBR files - added Xing/Info and VBRI header parsing with MPEG2/2.5 bitrate table support
+- Fixed Track Metadata screen showing scan date instead of file date for local library items
+- Fixed SAF content URI paths displayed as raw `content://` strings in Track Metadata - now shows human-readable paths
+- Added legacy download method fallback in PlatformBridge for platforms that haven't implemented `downloadByStrategy` yet
+
+---
+
 ## [3.6.5] - 2026-02-10
 
 ### Highlights

ios/Runner/AppDelegate.swift

@@ -94,6 +94,19 @@ import Gobackend  // Import Go framework
             let response = GobackendDownloadWithFallback(requestJson, &error)
             if let error = error { throw error }
             return response
+
+        case "downloadByStrategy":
+            let requestJson = call.arguments as! String
+            let response = GobackendDownloadByStrategy(requestJson, &error)
+            if let error = error { throw error }
+            return response
+
+        // Backward compatibility for older Flutter download routing
+        case "downloadFromYouTube":
+            let requestJson = call.arguments as! String
+            let response = GobackendDownloadFromYouTube(requestJson, &error)
+            if let error = error { throw error }
+            return response
             
         case "getDownloadProgress":
             let response = GobackendGetDownloadProgress()
@@ -209,6 +222,41 @@ import Gobackend  // Import Go framework
         case "cleanupConnections":
             GobackendCleanupConnections()
             return nil
+
+        case "downloadCoverToFile":
+            let args = call.arguments as! [String: Any]
+            let coverURL = args["cover_url"] as! String
+            let outputPath = args["output_path"] as! String
+            let maxQuality = args["max_quality"] as? Bool ?? true
+            GobackendDownloadCoverToFile(coverURL, outputPath, maxQuality, &error)
+            if let error = error { throw error }
+            return "{\"success\":true}"
+
+        case "extractCoverToFile":
+            let args = call.arguments as! [String: Any]
+            let audioPath = args["audio_path"] as! String
+            let outputPath = args["output_path"] as! String
+            GobackendExtractCoverToFile(audioPath, outputPath, &error)
+            if let error = error { throw error }
+            return "{\"success\":true}"
+
+        case "fetchAndSaveLyrics":
+            let args = call.arguments as! [String: Any]
+            let trackName = args["track_name"] as! String
+            let artistName = args["artist_name"] as! String
+            let spotifyId = args["spotify_id"] as! String
+            let durationMs = args["duration_ms"] as? Int64 ?? 0
+            let outputPath = args["output_path"] as! String
+            GobackendFetchAndSaveLyrics(trackName, artistName, spotifyId, durationMs, outputPath, &error)
+            if let error = error { throw error }
+            return "{\"success\":true}"
+
+        case "reEnrichFile":
+            let args = call.arguments as! [String: Any]
+            let requestJson = args["request_json"] as? String ?? "{}"
+            let response = GobackendReEnrichFile(requestJson, &error)
+            if let error = error { throw error }
+            return response
             
         case "readFileMetadata":
             let args = call.arguments as! [String: Any]

lib/constants/app_info.dart

@@ -1,8 +1,8 @@
 /// App version and info constants
 /// Update version here only - all other files will reference this
 class AppInfo {
-  static const String version = '3.6.5';
-  static const String buildNumber = '79';
+  static const String version = '3.6.6';
+  static const String buildNumber = '80';
   static const String fullVersion = '$version+$buildNumber';
   
   

lib/screens/track_metadata_screen.dart

@@ -436,6 +436,7 @@ class _TrackMetadataScreenState extends ConsumerState<TrackMetadataScreen> {
     }
     return _downloadItem!.downloadedAt;
   }
+
   String? get _quality => _isLocalItem ? null : _downloadItem!.quality;
 
   String get cleanFilePath {
@@ -443,6 +444,50 @@ class _TrackMetadataScreenState extends ConsumerState<TrackMetadataScreen> {
     return path.startsWith('EXISTS:') ? path.substring(7) : path;
   }
 
+  String _formatPathForDisplay(String pathOrUri) {
+    if (pathOrUri.isEmpty || !pathOrUri.startsWith('content://')) {
+      return pathOrUri;
+    }
+
+    try {
+      final uri = Uri.parse(pathOrUri);
+      final segments = uri.pathSegments;
+      String? documentId;
+
+      final documentIndex = segments.indexOf('document');
+      if (documentIndex != -1 && documentIndex + 1 < segments.length) {
+        documentId = Uri.decodeComponent(segments[documentIndex + 1]);
+      }
+
+      if (documentId == null || documentId.isEmpty) {
+        final treeIndex = segments.indexOf('tree');
+        if (treeIndex != -1 && treeIndex + 1 < segments.length) {
+          documentId = Uri.decodeComponent(segments[treeIndex + 1]);
+        }
+      }
+
+      if (documentId == null || documentId.isEmpty) return pathOrUri;
+
+      final separatorIndex = documentId.indexOf(':');
+      if (separatorIndex <= 0) return documentId;
+
+      final volumeId = documentId.substring(0, separatorIndex);
+      final relativePath = documentId
+          .substring(separatorIndex + 1)
+          .replaceAll('\\', '/');
+
+      if (volumeId.toLowerCase() == 'primary') {
+        if (relativePath.isEmpty) return '/storage/emulated/0';
+        return '/storage/emulated/0/$relativePath';
+      }
+
+      if (relativePath.isEmpty) return volumeId;
+      return 'SD Card/$relativePath';
+    } catch (_) {
+      return pathOrUri;
+    }
+  }
+
   void _markMetadataChanged() {
     _hasMetadataChanges = true;
   }
@@ -923,7 +968,7 @@ class _TrackMetadataScreenState extends ConsumerState<TrackMetadataScreen> {
   Widget _buildMetadataGrid(BuildContext context, ColorScheme colorScheme) {
     // Determine audio quality string - prefer stored quality from download
     String? audioQualityStr;
-    final fileName = _filePath.split('/').last;
+    final fileName = _extractFileNameFromPathOrUri(cleanFilePath);
     final fileExt = fileName.contains('.')
         ? fileName.split('.').last.toUpperCase()
         : '';
@@ -1045,7 +1090,8 @@ class _TrackMetadataScreenState extends ConsumerState<TrackMetadataScreen> {
     bool fileExists,
     int? fileSize,
   ) {
-    final fileName = cleanFilePath.split(Platform.pathSeparator).last;
+    final displayFilePath = _formatPathForDisplay(cleanFilePath);
+    final fileName = _extractFileNameFromPathOrUri(cleanFilePath);
     final fileExtension = fileName.contains('.')
         ? fileName.split('.').last.toUpperCase()
         : 'Unknown';
@@ -1166,7 +1212,9 @@ class _TrackMetadataScreenState extends ConsumerState<TrackMetadataScreen> {
                       ),
                     ),
                   )
-                else if (bitDepth != null && bitDepth! > 0 && sampleRate != null)
+                else if (bitDepth != null &&
+                    bitDepth! > 0 &&
+                    sampleRate != null)
                   Container(
                     padding: const EdgeInsets.symmetric(
                       horizontal: 12,
@@ -1232,7 +1280,7 @@ class _TrackMetadataScreenState extends ConsumerState<TrackMetadataScreen> {
                   children: [
                     Expanded(
                       child: Text(
-                        cleanFilePath,
+                        displayFilePath,
                         style: Theme.of(context).textTheme.bodySmall?.copyWith(
                           fontFamily: 'monospace',
                           color: colorScheme.onSurfaceVariant,