Update route.js

src/app/api/transcribe/route.js

@@ -43,7 +43,7 @@ async function parseMultipartForm(req) {
 }
 
 // Main handler
-export default async function handler(req, res) {
+export async function POST(req, res) {
   if (req.method !== "POST") {
     return res.status(405).json({ error: "Method not allowed. Use POST." });
   }