refactor: move ROUTES from @/lib/routes to @/router/routes

src/router/index.ts

@@ -0,0 +1,14 @@
+/**
+ * Router 公共导出
+ *
+ * 集中管理：
+ *  - 路由常量（ROUTES、ROUTE_BUILDERS、AUTH_ONLY_ROUTES、PUBLIC_ROUTES、ALL_STATIC_ROUTES）
+ *  - Next.js 16 Proxy（CDN 端鉴权重定向）
+ *
+ * 业务层导入示例：
+ *   ```ts
+ *   import { ROUTES, AUTH_ONLY_ROUTES, type Route } from "@/router";
+ *   ```
+ */
+export * from "./routes";
+export { proxy, config as proxyConfig } from "./proxy";