feat(live): 实现直播结束消息处理功能

- 在 live_chat_message_service 中新增结束直播消息的处理逻辑
- 新增 _handleEndLiveMessage 方法用于处理结束直播消息
- 收到 end_live 消息时自动关闭 overlay 小窗或跳转至直播结束页面
- 在 room_controller 中主播离开频道时发送 end_live 消息
- 导入必要的依赖包以支持新功能实现

lib/controller/discover/room_controller.dart

@@ -1,3 +1,5 @@
+import 'dart:convert';
+
 import 'package:agora_rtc_engine/agora_rtc_engine.dart';
 import 'package:dating_touchme_app/controller/global.dart';
 import 'package:dating_touchme_app/model/live/gift_product_model.dart';
@@ -5,6 +7,7 @@ import 'package:dating_touchme_app/model/rtc/rtc_channel_data.dart';
 import 'package:dating_touchme_app/model/rtc/rtc_channel_detail.dart';
 import 'package:dating_touchme_app/network/network_service.dart';
 import 'package:dating_touchme_app/rtc/rtc_manager.dart';
+import 'package:dating_touchme_app/rtc/rtm_manager.dart';
 import 'package:dating_touchme_app/service/live_chat_message_service.dart';
 import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
 import 'package:get/get.dart';
@@ -285,6 +288,17 @@ class RoomController extends GetxController {
   }
 
   Future<void> leaveChannel() async {
+    // 如果是主播，发送结束直播消息
+    if (currentRole == CurrentRole.broadcaster) {
+      final channelId = RTCManager.instance.currentChannelId;
+      if (channelId != null && channelId.isNotEmpty) {
+        await RTMManager.instance.publishChannelMessage(
+          channelName: channelId,
+          message: json.encode({'type': 'end_live'}),
+        );
+      }
+    }
+    
     isLive = false;
     if (currentRole == CurrentRole.maleAudience ||
         currentRole == CurrentRole.femaleAudience) {

lib/service/live_chat_message_service.dart

@@ -3,7 +3,9 @@ import 'dart:typed_data';
 import 'package:agora_rtm/agora_rtm.dart';
 import 'package:dating_touchme_app/controller/discover/room_controller.dart';
 import 'package:dating_touchme_app/controller/global.dart';
+import 'package:dating_touchme_app/controller/overlay_controller.dart';
 import 'package:dating_touchme_app/model/live/live_chat_message.dart';
+import 'package:dating_touchme_app/pages/discover/live_end_page.dart';
 import 'package:dating_touchme_app/rtc/rtc_manager.dart';
 import 'package:dating_touchme_app/rtc/rtm_manager.dart';
 import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
@@ -64,6 +66,13 @@ class LiveChatMessageService {
       final messageText = _parseMessageContent(event.message);
       final messageData = json.decode(messageText) as Map<String, dynamic>;
       print('📥 收到消息: $messageData');
+      
+      // 处理结束直播消息
+      if (messageData['type'] == 'end_live') {
+        _handleEndLiveMessage();
+        return;
+      }
+      
       // 只处理聊天消息类型
       if (messageData['type'] == 'chat_message') {
         final chatMessage = LiveChatMessage.fromJson(messageData);
@@ -80,6 +89,30 @@ class LiveChatMessageService {
     }
   }
 
+  /// 处理结束直播消息
+  void _handleEndLiveMessage() {
+    try {
+      // 检查 overlay 是否显示，如果显示则关闭
+      if (Get.isRegistered<OverlayController>()) {
+        final overlayController = Get.find<OverlayController>();
+        if (overlayController.showOverlay.value) {
+          overlayController.hide();
+          print('✅ 已关闭 overlay 小窗');
+          return;
+        }
+      }
+
+      // 检查当前是否在 LiveRoomPage，如果是则跳转到 live_end_page
+      final currentRoute = Get.currentRoute;
+      if (currentRoute == '/LiveRoomPage' || currentRoute.contains('LiveRoomPage')) {
+        Get.off(() => const LiveEndPage());
+        print('✅ 已跳转到直播结束页面');
+      }
+    } catch (e) {
+      print('❌ 处理结束直播消息失败: $e');
+    }
+  }
+
   /// 解析消息内容（支持 String 和 Uint8List）
   String _parseMessageContent(dynamic message) {
     if (message is String) {