feat(admin+api): 代理停用默认、结算加固与冒烟配置探针

- 代理层级默认授信比例与停用冻结/禁登全局默认

- 结算预览去重、比分校验、串关当场判负与市场类型校验

- 站内信 Banner/公告自动通知开关；开发环境动态 API 端口

- 扩充 RBAC/结算/认证/返现单元测试与 agent skills

apps/api/package.json

@@ -4,7 +4,7 @@
   "private": true,
   "scripts": {
     "build": "nest build",
-    "dev": "node ../../scripts/ensure-port-free.mjs 3000 && nest start --watch",
+    "dev": "node ../../scripts/ensure-port-free.mjs && nest start --watch",
     "start": "node dist/main",
     "test": "jest",
     "test:watch": "jest --watch",