chore(client): 客服邮箱全局统一为 support@51yanmei.com（单源 store_compliance）

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

client/assets/config/app_info.json

@@ -1,7 +1,7 @@
 {
   "provider": "岩美技术有限公司",
   "website": "https://jiu.51yanmei.com",
-  "email": "yammy2023@163.com",
+  "email": "support@51yanmei.com",
   "phone": "",
   "wechat": "",
   "terms_url": "https://jiu.51yanmei.com/terms/",

client/lib/screens/auth/login_screen.dart

@@ -18,6 +18,7 @@ import 'package:url_launcher/url_launcher.dart';
 import '../../core/auth/auth_state.dart';
 import '../../core/config/app_config.dart';
 import '../../core/config/app_constants.dart';
+import '../../core/config/store_compliance.dart';
 import '../../core/responsive/responsive.dart';
 import '../../core/storage/login_history.dart';
 import '../../core/theme/app_chrome.g.dart';
@@ -52,8 +53,9 @@ class _LoginScreenState extends ConsumerState<LoginScreen> {
   bool _remember = true;
   String? _errorMessage;
 
-  // 客服邮箱（授权续费 / 锁定协助）。与官网 web/_data/site.json 的 support.email 保持一致。
-  static const _supportEmail = 'yammy2023@163.com';
+  // 客服邮箱（授权续费 / 锁定协助）。单一来源 store_compliance.supportEmail，
+  // 与官网 web/_data/site.json 的 support.email 保持一致。
+  static const _supportEmail = supportEmail;
 
   /// 当前错误是否为「授权锁定」——后端返回固定文案
   /// `license locked, please renew or contact support`（见 service.ErrLicenseLocked）。