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)/admin-roles/page.tsx

@@ -1,11 +1,9 @@
 import { ModuleScaffold } from "@/components/admin/module-scaffold";
 import { AdminRolesConsole } from "@/modules/admin-roles/admin-roles-console";
-import { adminRolesModuleMeta } from "@/modules/admin-roles/meta";
+import { buildPageMetadata } from "@/lib/page-metadata";
 import type { Metadata } from "next";
 
-export const metadata: Metadata = {
-  title: adminRolesModuleMeta.title,
-};
+export const metadata: Metadata = buildPageMetadata("adminRoles", "title");
 
 export default function AdminRolesPage() {
   return (