feat: ice断开返回配置页面

webrtc_controller_flutter/lib/webrtc/webrtc_controller.dart

@@ -29,6 +29,9 @@ class WebRtcController {
   void Function(String error)? onConnectionFailed;
   void Function()? onDisconnected;
 
+  /// ICE 连接断开（如网络中断、被控端退出），用于提示用户并返回连接设置。
+  void Function(String message)? onIceDisconnected;
+
   /// 远端视频流就绪（renderer 已绑定视频轨道）。
   void Function(RTCVideoRenderer renderer)? onRemoteStream;
 
@@ -124,7 +127,10 @@ class WebRtcController {
     print('ICE connection state: $state');
     if (state == RTCIceConnectionState.RTCIceConnectionStateConnected) {
       onConnectionEstablished?.call();
+    } else if (state == RTCIceConnectionState.RTCIceConnectionStateDisconnected) {
+      onIceDisconnected?.call('ICE 连接已断开');
     } else if (state == RTCIceConnectionState.RTCIceConnectionStateFailed) {
+      onConnectionFailed?.call('ICE 连接失败');
       onDisconnected?.call();
     }
   }