refactor: 更新管理端页面元数据，统一国际化支持，移除冗余代码

src/app/admin/(shell)/config/layout.tsx

@@ -1,7 +1,6 @@
 import type { ReactNode } from "react";
 
-import { ConfigWorkspaceShell } from "@/modules/config/config-workspace-shell";
-
+/** 配置总览仅展示卡片入口，不再挂载横向子导航。 */
 export default function AdminConfigLayout({ children }: { children: ReactNode }) {
-  return <ConfigWorkspaceShell>{children}</ConfigWorkspaceShell>;
+  return children;
 }