fix(flutter): 精修首页 feed 交互与底色

lib/pages/player/player_view_actions.dart

@@ -43,25 +43,6 @@ extension _PlayerViewActions on _PlayerPageState {
     );
   }
 
-  /// 首页 feed 的「全屏观看」：以当前剧集为起点打开全屏播放页。
-  Future<void> _openFullscreen(
-    BuildContext context,
-    Drama drama,
-    Episode episode,
-  ) async {
-    final index = drama.episodes.indexWhere((item) => item.id == episode.id);
-    await Navigator.of(context).push(
-      MaterialPageRoute<void>(
-        builder: (_) => PlayerPage(
-          drama: drama,
-          initialIndex: index < 0 ? 0 : index,
-          wallet: widget.wallet,
-          downloads: widget.downloads,
-        ),
-      ),
-    );
-  }
-
   Future<void> _openUnlockSheet(
     BuildContext context,
     int index,