first commit

app/api/admin/check/route.ts

@@ -0,0 +1,10 @@
+import { NextResponse } from "next/server";
+import { isAdminAuthenticated, ADMIN_USERNAME } from "@/lib/auth";
+
+export async function GET() {
+  const authenticated = await isAdminAuthenticated();
+  return NextResponse.json({
+    authenticated,
+    username: authenticated ? ADMIN_USERNAME : null,
+  });
+}