refactor: frontend 重命名为 backend-adminend，新增 shccd159/shjjy153 配置

- frontend 目录迁移至 backend-adminend（管理后台前端）
- 新增 application-shccd159.yml、application-shjjy153.yml
- 更新 deploy.conf、DEPLOY.md、application.yml

Made-with: Cursor

backend-adminend/.gitignore

@@ -0,0 +1,23 @@
+.DS_Store
+node_modules/
+dist/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+**/*.log
+
+tests/**/coverage/
+tests/e2e/reports
+selenium-debug.log
+
+# Editor directories and files
+.idea
+.vscode
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.local
+
+package-lock.json
+yarn.lock