fix(tv): fade media detail transitions

lib/screens/media_detail_screen.dart

@@ -101,6 +101,24 @@ class MediaDetailScreen extends StatefulWidget {
   State<MediaDetailScreen> createState() => _MediaDetailScreenState();
 }
 
+PageRoute<bool> mediaDetailRoute({required MediaItem metadata, bool isOffline = false, int? initialSeasonIndex}) {
+  final page = MediaDetailScreen(metadata: metadata, isOffline: isOffline, initialSeasonIndex: initialSeasonIndex);
+  if (!PlatformDetector.isTV()) return MaterialPageRoute<bool>(builder: (_) => page);
+
+  return PageRouteBuilder<bool>(
+    opaque: false,
+    pageBuilder: (_, __, ___) => page,
+    transitionsBuilder: (_, animation, __, child) {
+      return FadeTransition(
+        opacity: CurvedAnimation(parent: animation, curve: Curves.easeOutCubic, reverseCurve: Curves.easeInCubic),
+        child: child,
+      );
+    },
+    transitionDuration: AppDurations.animMedium,
+    reverseTransitionDuration: AppDurations.animMedium,
+  );
+}
+
 class _MediaDetailScreenState extends State<MediaDetailScreen>
     with WatchStateAware, DeletionAware, MountedSetStateMixin, ServerBoundMediaMixin, RouteAware {
   /// Public input alias — used as the live source of truth until the detail

lib/utils/media_navigation_helper.dart

@@ -131,10 +131,7 @@ Future<MediaNavigationResult> navigateToMediaItem(
         );
         final result = await Navigator.push<bool>(
           context,
-          MaterialPageRoute(
-            builder: (context) =>
-                MediaDetailScreen(metadata: showStub, isOffline: isOffline, initialSeasonIndex: mi.index),
-          ),
+          mediaDetailRoute(metadata: showStub, isOffline: isOffline, initialSeasonIndex: mi.index),
         );
         if (result == true) {
           onRefresh?.call(mi.id);
@@ -154,12 +151,7 @@ Future<MediaNavigationResult> _showDetail(
   bool isOffline,
   void Function(String)? onRefresh,
 ) async {
-  final result = await Navigator.push<bool>(
-    context,
-    MaterialPageRoute(
-      builder: (context) => MediaDetailScreen(metadata: mi, isOffline: isOffline),
-    ),
-  );
+  final result = await Navigator.push<bool>(context, mediaDetailRoute(metadata: mi, isOffline: isOffline));
   if (result == true) {
     onRefresh?.call(mi.id);
   }

lib/widgets/media_card.dart

@@ -949,10 +949,7 @@ void _navigateToSeason(BuildContext context, MediaItem episode, {bool isOffline
     );
     Navigator.push(
       context,
-      MaterialPageRoute(
-        builder: (_) =>
-            MediaDetailScreen(metadata: showStub, isOffline: isOffline, initialSeasonIndex: episode.parentIndex),
-      ),
+      mediaDetailRoute(metadata: showStub, isOffline: isOffline, initialSeasonIndex: episode.parentIndex),
     );
   } else if (episode.parentId != null) {
     // Fallback: navigate to season directly if no grandparent
@@ -969,12 +966,7 @@ void _navigateToSeason(BuildContext context, MediaItem episode, {bool isOffline
       serverId: episode.serverId,
       serverName: episode.serverName,
     );
-    Navigator.push(
-      context,
-      MaterialPageRoute(
-        builder: (_) => MediaDetailScreen(metadata: seasonStub, isOffline: isOffline),
-      ),
-    );
+    Navigator.push(context, mediaDetailRoute(metadata: seasonStub, isOffline: isOffline));
   }
 }
 
@@ -1016,9 +1008,7 @@ void _navigateToDetail(BuildContext context, MediaItem mi, {bool isOffline = fal
 
   Navigator.push(
     context,
-    MaterialPageRoute(
-      builder: (_) => MediaDetailScreen(metadata: target, isOffline: isOffline, initialSeasonIndex: initialSeasonIndex),
-    ),
+    mediaDetailRoute(metadata: target, isOffline: isOffline, initialSeasonIndex: initialSeasonIndex),
   );
 }
 

lib/widgets/media_context_menu.dart

@@ -654,7 +654,7 @@ class MediaContextMenuState extends State<MediaContextMenu> {
           await _navigateToRelated(
             context,
             mediaItem!.kind == MediaKind.season ? mediaItem.parentId : mediaItem.grandparentId,
-            (item) => MediaDetailScreen(metadata: item),
+            (item) => mediaDetailRoute(metadata: item),
             t.messages.errorLoadingSeries,
           );
           break;
@@ -667,7 +667,7 @@ class MediaContextMenuState extends State<MediaContextMenu> {
           await _navigateToRelated(
             context,
             seasonParentKey,
-            (show) => MediaDetailScreen(metadata: show, initialSeasonIndex: seasonIndex),
+            (show) => mediaDetailRoute(metadata: show, initialSeasonIndex: seasonIndex),
             t.messages.errorLoadingSeason,
           );
           break;
@@ -800,7 +800,7 @@ class MediaContextMenuState extends State<MediaContextMenu> {
   Future<void> _navigateToRelated(
     BuildContext context,
     String? id,
-    Widget Function(MediaItem) screenBuilder,
+    Route<Object?> Function(MediaItem) routeBuilder,
     String errorPrefix,
   ) async {
     if (id == null) return;
@@ -810,7 +810,7 @@ class MediaContextMenuState extends State<MediaContextMenu> {
     try {
       final metadata = await client.fetchItem(id);
       if (metadata != null && context.mounted) {
-        await Navigator.push(context, MaterialPageRoute(builder: (context) => screenBuilder(metadata)));
+        await Navigator.push(context, routeBuilder(metadata));
         widget.onRefresh?.call(_itemId());
       }
     } catch (e) {