feat:增加消息功能

lib/pages/messages_page.dart

@@ -79,6 +79,7 @@ class MessagePage extends StatelessWidget {
                 MaterialPageRoute(
                   builder:
                       (_) => const ChatPage(
+                        contractId: 0,
                         contactName: '张三',
                         avatarUrl: 'https://picsum.photos/id/1012/200',
                       ),
@@ -125,11 +126,4 @@ class Message {
   });
 }
 
-List<Message> _messages = [
-  Message(
-    avatar: 'https://picsum.photos/id/1012/200',
-    name: '小刘',
-    lastMsg: '今晚一起吃饭吗？',
-    time: '12:30',
-  ),
-];
+List<Message> _messages = [];