完善移动端错误提示中文化

apps/user_app/test/ui/login_page_test.dart

@@ -1,9 +1,13 @@
+// 功能描述：验证用户端登录页字段、手机号校验和接口错误中文化。
+// 版本：1.1.0
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:user_app/app/dependencies.dart';
+import 'package:user_app/data/services/api_client.dart';
 import 'package:user_app/data/services/secure_session_store.dart';
 import 'package:user_app/ui/features/auth/login_page.dart';
 
+/// 验证用户端登录界面的关键交互。
 void main() {
   testWidgets('login page exposes phone and password fields', (tester) async {
     final session = UserSession(SecureSessionStore());
@@ -13,4 +17,23 @@ void main() {
     expect(find.byType(TextField), findsNWidgets(2));
     expect(find.text('安全登录'), findsOneWidget);
   });
+
+  testWidgets('手机号格式错误显示输入框中文提示', (tester) async {
+    final session = UserSession(SecureSessionStore());
+    await tester.pumpWidget(MaterialApp(home: LoginPage(session: session)));
+
+    await tester.enterText(find.byType(TextField).first, '+8613800138000');
+    await tester.tap(find.text('安全登录'));
+    await tester.pump();
+
+    expect(find.text('请输入正确的11位手机号'), findsOneWidget);
+    expect(find.text('Invalid Argument'), findsNothing);
+  });
+
+  test('接口错误优先按错误码中文化并屏蔽未知英文', () {
+    expect(localizeApiErrorMessage(1704, 'Invalid Argument'), '请求参数错误');
+    expect(localizeApiErrorMessage(1108, 'Password Incorrect'), '密码错误');
+    expect(localizeApiErrorMessage(9999, '业务处理失败'), '业务处理失败');
+    expect(localizeApiErrorMessage(9999, 'Unexpected Error'), '操作失败，请稍后重试');
+  });
 }