feat: Enhance login page UI with delayed redirect instead of transparent 307

apps/web/src/app/admin/page.tsx

@@ -0,0 +1,18 @@
+import Link from "next/link";
+
+export default function AdminLandingPage() {
+  return (
+    <div className="min-h-screen bg-gray-950 text-gray-100 p-8 font-sans">
+      <div className="max-w-3xl mx-auto space-y-4">
+        <h1 className="text-3xl font-bold">VibeWork 後台</h1>
+        <p className="text-gray-300">請使用 wooo 帳號登入後前往後台頁面。</p>
+        <div>
+          <Link href="/admin/traffic" className="text-emerald-400 hover:text-emerald-300">
+            前往流量監控後台
+          </Link>
+        </div>
+      </div>
+    </div>
+  );
+}
+

apps/web/src/app/admin/traffic/page.tsx

@@ -0,0 +1,2 @@
+export { default } from "../../traffic/page";
+