build: 三端构建 - Dev技能

- ✅ 后端: mvn clean package -DskipTests (2.8s)
- ✅ Flutter Web: flutter build web --release --dart-define=ENV=prod (28.6s)
- ⚠️ Admin: TypeScript类型错误（已知问题）
- 📦 拉取远程更新: 91个文件变更
  - Flutter代码格式调整（缩进2->4）
  - 福利中心页面增强（+274行）
  - 后端福利服务增强（+140行）
  - KYC文件上传功能

flutter_monisuo/build/web/flutter_bootstrap.js

@@ -37,6 +37,6 @@ _flutter.buildConfig = {"engineRevision":"e4b8dca3f1b4ede4c30371002441c88c12187e
 
 _flutter.loader.load({
   serviceWorkerSettings: {
-    serviceWorkerVersion: "2074081457" /* Flutter's service worker is deprecated and will be removed in a future Flutter release. */
+    serviceWorkerVersion: "3066931208" /* Flutter's service worker is deprecated and will be removed in a future Flutter release. */
   }
 });