fix: fix missing update in playback init & translate french comments

lib/client/plex_client.dart

@@ -480,18 +480,19 @@ class PlexClient {
         queryParams['subtitleStreamID'] = subtitleStreamID;
       }
       if (allParts) {
-      // If no streams to select, return early
-      if (queryParams.isEmpty) {
-        return true;
+        // If no streams to select, return early
+        if (queryParams.isEmpty) {
+          return true;
+        }
+
+        // Use PUT request on /library/parts/{partId}
+        final response = await _dio.put(
+          '/library/parts/$partId',
+          queryParameters: queryParams,
+        );
+
+        return response.statusCode == 200;
       }
-
-      // Use PUT request on /library/parts/{partId}
-      final response = await _dio.put(
-        '/library/parts/$partId',
-        queryParameters: queryParams,
-      );
-
-      return response.statusCode == 200;
     } catch (e) {
       appLogger.e('Failed to select streams', error: e);
       return false;

lib/screens/video_player_screen.dart

@@ -31,7 +31,7 @@ import '../i18n/strings.g.dart';
 
 Map<String, dynamic>? _isoLangTable;
 
-/// Charger la table en mémoire au démarrage du widget (dans initState par exemple)
+/// Load the table into memory at widget startup (in initState for example)
 Future<void> loadIsoTable() async {
   final data = await rootBundle.loadString('lib/data/iso_6369_codes.json');
   _isoLangTable = json.decode(data) as Map<String, dynamic>;
@@ -226,10 +226,10 @@ class VideoPlayerScreenState extends State<VideoPlayerScreen>
     }
   }
 
-  /// Convertit un code à 2 lettres "fr", "nl", "ca" en code Plex à 3 lettres, ou renvoie null si inconnu
+  /// Converts a 2-letter code like "fr", "nl", "ca" to a Plex 3-letter code, or returns null if unknown
   String? _iso6391ToPlex6392(String? code) {
     if (code == null || code.isEmpty || _isoLangTable == null) return null;
-    // Prend la base "fr" de "fr-FR"
+    // Takes the base "fr" from "fr-FR"
     final lang = code.split('-').first.toLowerCase();
     final langEntry = _isoLangTable![lang] as Map<String, dynamic>?;
     return langEntry?['639-2'] as String?;

lib/services/playback_initialization_service.dart

@@ -96,6 +96,7 @@ class PlaybackInitializationService {
       // Return result with available versions for UI updates
       return PlaybackInitializationResult(
         availableVersions: playbackData.availableVersions,
+        mediaInfo: mediaInfo,
       );
     } catch (e) {
       if (e is PlaybackException) {
@@ -199,8 +200,12 @@ class PlaybackInitializationService {
 /// Result of playback initialization
 class PlaybackInitializationResult {
   final List<dynamic> availableVersions;
+  final PlexMediaInfo? mediaInfo;
 
-  PlaybackInitializationResult({required this.availableVersions});
+  PlaybackInitializationResult({
+    required this.availableVersions,
+    this.mediaInfo,
+  });
 }
 
 /// Exception thrown when playback initialization fails