优化了老师端的等待状态判断逻辑

lib/pages/student/room/viewmodel/stu_room_vm.dart

@@ -1,5 +1,7 @@
 import 'dart:async';
 
+import 'package:agora_rtc_engine/agora_rtc_engine.dart';
+import 'package:app/config/config.dart';
 import 'package:app/providers/user_store.dart';
 import 'package:app/request/dto/room/room_info_dto.dart';
 import 'package:app/request/dto/room/room_type_dto.dart';
@@ -36,12 +38,48 @@ class StuRoomVM extends ChangeNotifier {
   final RoomWebSocket _ws = RoomWebSocket();
   StreamSubscription<RoomMessage>? _sub;
 
-  RtcTokenDto? get rtcToken => _ws.rtcToken;
+  /// 声网sdk管理
+  RtcEngine? _engine;
+
+  RtcEngine? get engine => _engine;
 
   StuRoomVM({required this.roomInfo, required this.uid}) {
     _startRoom();
   }
 
+  ///初始化声网
+  Future<void> _initRtc() async {
+    _engine = createAgoraRtcEngine();
+    //初始化 RtcEngine，设置频道场景为 channelProfileLiveBroadcasting（直播场景）
+    await _engine!.initialize(
+      RtcEngineContext(
+        appId: Config.swAppId,
+        channelProfile: ChannelProfileType.channelProfileCommunication,
+      ),
+    );
+    //启动视频模块
+    await _engine!.enableVideo();
+    //加入频道
+    await _engine!.joinChannel(
+      token: _ws.rtcToken!.token,
+      channelId: _ws.rtcToken!.channel,
+      uid: uid,
+      // uid: _ws.rtcToken!.uid,
+      options: ChannelMediaOptions(
+        // 自动订阅所有视频流
+        autoSubscribeVideo: true,
+        // 自动订阅所有音频流
+        autoSubscribeAudio: true,
+        // 发布摄像头采集的视频
+        publishCameraTrack: true,
+        // 发布麦克风采集的音频
+        publishMicrophoneTrack: true,
+        // 设置用户角色为 clientRoleBroadcaster（主播）或 clientRoleAudience（观众）
+        clientRoleType: ClientRoleType.clientRoleBroadcaster,
+      ),
+    );
+  }
+
   ///开始链接房间
   Future<void> _startRoom() async {
     //如果socket的token没有，先初始化