Fix production TypeScript build errors across meetups, media proxy, and join modal.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/api/media/proxy/route.ts

@@ -59,7 +59,7 @@ async function objectExists(client: ReturnType<typeof getMinioClient>, bucket: s
 }
 
 function passthroughResponse(buffer: Buffer, contentType: string): NextResponse {
-  return new NextResponse(buffer, {
+  return new NextResponse(new Uint8Array(buffer), {
     status: 200,
     headers: {
       "Content-Type": contentType,