chore(router): disable router proxy and re-exports by commenting out

Comment out `src/router/index.ts` and `src/router/proxy.ts` to temporarily
disable the Next.js 16 proxy (auth-driven redirects) and router re-exports.
This effectively turns off the centralized route guard logic and stops the
proxy from intercepting requests until further iteration.

src/router/routes.ts

@@ -8,6 +8,10 @@
  *  - `as const` 让每个值都是字符串字面量类型，可用于 `PageProps<'/literal'>`。
  *  - 不导出 Client-only 模块（`use-auth-gate` 走独立路径导入），保证 Server bundle 不被污染。
  *  - 动态深链通过 `ROUTE_BUILDERS` 函数生成，避免手拼字符串。
+ *
+ * 注意：proxy 路由跳转逻辑（2026-06-15 迁出），但本文件的**类型化常量**仍在
+ * 被 9 个组件（auth-screen / chat-header / quota-dialog / DeepLinkPersist /
+ * error / not-found / page / sidebar-screen / splash-screen）使用 —— **不能**整体注释。
  */
 
 /** 静态路由字面量 */