feat(flutter): 按参考图重做首页 feed 浮层

lib/pages/player/player_view_actions.dart

@@ -43,6 +43,25 @@ 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,