feat: expand platform management, admin controls, and learning workflows

frontend/src/app/admin139/page.tsx

@@ -1,28 +1,25 @@
-import Link from "next/link";
+"use client";
+
+import { useRouter } from "next/navigation";
+import { useEffect } from "react";
+
+import { useUiPreferences } from "@/components/ui-preference-provider";
 
 export default function AdminEntryPage() {
+  const { t } = useUiPreferences();
+  const router = useRouter();
+
+  useEffect(() => {
+    router.replace("/imports");
+  }, [router]);
+
   return (
     <main className="mx-auto max-w-3xl px-4 py-10">
-      <h1 className="text-2xl font-semibold">后台管理入口</h1>
-      <p className="mt-3 text-sm text-zinc-600">
-        默认管理员账号：<span className="font-medium text-zinc-900">admin</span>，密码：
-        <span className="font-medium text-zinc-900">whoami139</span>
+      <h1 className="text-2xl font-semibold">{t("admin.entry.title")}</h1>
+      <p className="mt-3 text-sm text-zinc-600">{t("admin.entry.desc")}</p>
+      <p className="mt-2 text-sm text-zinc-500">
+        {t("admin.entry.moved_to_platform")}
       </p>
-
-      <div className="mt-6 grid gap-3 sm:grid-cols-2">
-        <Link className="rounded-lg border bg-white px-4 py-3 text-sm hover:bg-zinc-50" href="/auth">
-          去登录
-        </Link>
-        <Link className="rounded-lg border bg-white px-4 py-3 text-sm hover:bg-zinc-50" href="/admin-users">
-          用户积分管理
-        </Link>
-        <Link className="rounded-lg border bg-white px-4 py-3 text-sm hover:bg-zinc-50" href="/admin-redeem">
-          积分兑换管理
-        </Link>
-        <Link className="rounded-lg border bg-white px-4 py-3 text-sm hover:bg-zinc-50" href="/backend-logs">
-          后台任务日志
-        </Link>
-      </div>
     </main>
   );
 }