Update route.js

src/app/api/transcribe/route.js

@@ -56,7 +56,7 @@ async function parseMultipartForm(req) {
 }
 
 // Main handler
-export default async function handler(req, res) {
+export default async function PUT(req, res) {
   if (req.method !== 'POST') {
     return res.status(405).json({ error: 'Method not allowed. Use POST.' });
   }