fix: expose error message in api for debugging

server/routes/recognize.js

@@ -100,7 +100,7 @@ router.post('/', upload.single('audio'), async (req, res) => {
 
   } catch (err) {
     console.error('Recognition error:', err.message);
-    res.status(500).json({ error: 'Failed to recognize audio' });
+    res.status(500).json({ error: 'Failed to recognize audio: ' + err.message });
   } finally {
     // Clean up uploaded file
     fs.unlink(filePath, () => {});