fix(ui): tighten media detail spacing

lib/screens/media_detail_screen.dart

@@ -3885,7 +3885,7 @@ class _MediaDetailScreenState extends State<MediaDetailScreen>
     const innerPadding = 3.0;
     final imageSize = cardWidth;
     // image + inner padding + text area + outer list padding + focus scale headroom
-    final containerHeight = imageSize + innerPadding * 2 + 66 + 16;
+    final containerHeight = imageSize + innerPadding * 2 + 58 + 10;
 
     final theme = Theme.of(context);
     final actorNameStyle = theme.textTheme.bodyMedium?.copyWith(fontWeight: FontWeight.w600);
@@ -3988,7 +3988,7 @@ class _MediaDetailScreenState extends State<MediaDetailScreen>
     final cardWidth = _getResponsiveCardWidth();
     // 16:9 aspect ratio for clip thumbnails (cardWidth includes 8px padding on each side)
     final posterHeight = (cardWidth - 16) * (9 / 16);
-    final containerHeight = posterHeight + 66;
+    final containerHeight = posterHeight + 52;
 
     return Focus(
       focusNode: _extrasFocusNode,

lib/widgets/tv_browse_rail.dart

@@ -68,6 +68,8 @@ class TvBrowseRailLayout {
 
   static double railInteractionExpansionForScale(double scale) => (12 * scale).clamp(8, 18).toDouble();
 
+  static double itemGapForScale(double _) => 0;
+
   static double hubStripHeightForScale(double scale) => 36 * scale;
 
   static double hubStripGapForScale(double _) => 0;
@@ -114,7 +116,7 @@ class TvBrowseRailLayout {
   }) {
     final focusExtra = FocusTheme.focusBorderWidth * 2 * scale;
     final railEdgePadding = focusExtra + (12 * scale);
-    final itemGap = 8 * scale;
+    final itemGap = itemGapForScale(scale);
     final isPersonHub = TvBrowseRailLayout.isPersonHub(hub);
     final hasWide = !isPersonHub && hub.items.any((item) => item.usesWideAspectRatio(episodePosterMode));
     final hasTall = !isPersonHub && hub.items.any((item) => !item.usesWideAspectRatio(episodePosterMode));