Add dummy default export to _notifications.ts

cgen-f42d76217455493c8bd4eebadf03234e

api/_notifications.ts

@@ -40,3 +40,12 @@ export async function notifyOnboardingComplete(userId: string): Promise<void> {
     "You've completed your profile setup. Let's get started!",
   );
 }
+
+// Dummy default export for Vercel (this file is a utility, not a handler)
+import type { VercelRequest, VercelResponse } from "@vercel/node";
+export default async function handler(
+  req: VercelRequest,
+  res: VercelResponse,
+) {
+  return res.status(501).json({ error: "Not a handler" });
+}