dual check v0.1

client/pubspec.yaml

@@ -35,6 +35,11 @@ dependencies:
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.8
 
+  # HTTP 客户端 + WebSocket + 本地持久化
+  dio: ^5.8.0
+  web_socket_channel: ^2.4.5
+  shared_preferences: ^2.5.2
+
 dev_dependencies:
   flutter_test:
     sdk: flutter