feat: 增加请求弹窗和拒绝说明

webrtc_controller_flutter/lib/controller/remote_controller.dart

@@ -34,6 +34,9 @@ class RemoteController {
   /// 目标被控端不在线（服务器回送 TARGET_OFFLINE，用于提示用户并复位 UI）。
   void Function(String message)? onTargetOffline;
 
+  /// 被控端拒绝了连接请求（用于提示用户并复位 UI）。
+  void Function(String message)? onConnectionRejected;
+
   /// 远端视频渲染器就绪。
   void Function(RTCVideoRenderer renderer)? onRemoteStream;
 
@@ -90,6 +93,8 @@ class RemoteController {
     switch (message.type?.toUpperCase()) {
       case 'ANSWER':
         final payload = jsonDecode(message.payload!) as Map<String, dynamic>;
+        // 被控端已接受连接请求，进入 WebRTC 协商阶段。
+        onStatusChanged?.call('状态: 被控端已接受连接，正在建立连接...');
         _webRtc?.handleAnswer(payload['sdp'] as String);
         break;
       case 'ICE_CANDIDATE':
@@ -101,6 +106,13 @@ class RemoteController {
         onStatusChanged?.call('状态: $text');
         onTargetOffline?.call(text);
         break;
+      case 'CONNECTION_REJECTED':
+      case 'REQUEST_ERROR':
+      case 'REQUEST_TIMEOUT':
+        final text = message.payload ?? '连接请求失败';
+        onStatusChanged?.call('状态: $text');
+        onConnectionRejected?.call(text);
+        break;
     }
   }
 

webrtc_controller_flutter/lib/main.dart

@@ -102,6 +102,9 @@ class _ControllerHomeState extends State<ControllerHome> {
     _controller!.onTargetOffline = (message) {
       _onTargetOffline(message);
     };
+    _controller!.onConnectionRejected = (message) {
+      _onConnectionRejected(message);
+    };
     _controller!.onRemoteStream = (renderer) {
       setState(() => _renderer = renderer);
       renderer.addListener(_onRendererUpdate);
@@ -147,6 +150,20 @@ class _ControllerHomeState extends State<ControllerHome> {
     setState(() => _connected = false);
   }
 
+  /// 被控端拒绝连接请求：提示用户并复位到连接设置面板。
+  Future<void> _onConnectionRejected(String message) async {
+    final scaffoldCtx = _scaffoldKey.currentState?.context;
+    if (mounted && scaffoldCtx != null) {
+      ScaffoldMessenger.of(scaffoldCtx).showSnackBar(
+        SnackBar(
+          content: Text(message),
+          duration: const Duration(seconds: 3),
+        ),
+      );
+    }
+    setState(() => _connected = false);
+  }
+
   Future<void> _disconnect() async {
     await _controller?.disconnect();
     _controller = null;