change

app/api/qr/route.ts

@@ -0,0 +1,24 @@
+import { NextRequest } from "next/server";
+import QRCode from "qrcode";
+
+export const dynamic = "force-dynamic";
+
+export async function GET(req: NextRequest) {
+  const url = req.nextUrl.searchParams.get("url") || "";
+  if (!url) {
+    return new Response("Missing url", { status: 400 });
+  }
+
+  const png = await QRCode.toBuffer(url, {
+    width: 240,
+    margin: 1
+  });
+
+  const body = new Uint8Array(png);
+  return new Response(body, {
+    headers: {
+      "Content-Type": "image/png",
+      "Cache-Control": "public, max-age=86400"
+    }
+  });
+}