fix(admin): persist data directory and pass env vars

app/admin/login/page.tsx

@@ -0,0 +1,13 @@
+import type { Metadata } from "next";
+import AdminLoginForm from "@/components/admin/AdminLoginForm";
+
+export const metadata: Metadata = {
+  title: "Admin Login | Funktechnik Schubert",
+  robots: { index: false, follow: false },
+};
+
+export default async function AdminLoginPage({ searchParams }: { searchParams: Promise<{ next?: string }> }) {
+  const params = await searchParams;
+  const nextPath = params.next?.startsWith("/admin") ? params.next : "/admin";
+  return <AdminLoginForm nextPath={nextPath} />;
+}