新增一个chat_popup 来显示聊天窗口

lib/widgets/floating_icon.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import '../services/message_service.dart';
-import '../screens/full_screen.dart';
+import '../pages/full_screen.dart';
 import '../screens/part_screen.dart';
 import 'floating_icon_with_wave.dart';
 import 'dart:async';
@@ -103,7 +103,7 @@ class _FloatingIconState extends State<FloatingIcon> with TickerProviderStateMix
       MaterialPageRoute(
         builder: (context) => ChangeNotifierProvider.value(
           value: messageService, // 传递同一个单例实例
-          child: const FullScreen(),
+          child: const FullScreenPage(),
         ),
       ),
     );