feat(app): 完善播放协议搜索与空状态

lib/pages/player/widgets/player_overlay_models.dart

@@ -1,7 +1,6 @@
 // Author: fruit.com.cn
 
 import 'package:flutter/foundation.dart';
-import 'package:flutter/widgets.dart';
 import 'package:video_player/video_player.dart';
 
 import '../../../core/data/models/drama.dart';