Fix: Forzar mimetype ogg para notas de voz PTT

- Preferir grabacion en ogg/opus en el navegador
- Forzar mimetype a audio/ogg; codecs=opus para PTT en servidor
- WhatsApp requiere ogg para notas de voz

app/composables/useAudioRecorder.ts

@@ -36,22 +36,25 @@ export function useAudioRecorder() {
   })
 
   // Get preferred MIME type for recording
+  // Prefer ogg/opus as it's required by WhatsApp for voice notes
   const getMimeType = (): string => {
     const types = [
+      'audio/ogg;codecs=opus',  // Preferred for WhatsApp PTT
+      'audio/ogg',
       'audio/webm;codecs=opus',
       'audio/webm',
-      'audio/ogg;codecs=opus',
-      'audio/ogg',
       'audio/mp4',
       'audio/mpeg'
     ]
 
     for (const type of types) {
       if (MediaRecorder.isTypeSupported(type)) {
+        console.log('[AudioRecorder] Using MIME type:', type)
         return type
       }
     }
 
+    console.warn('[AudioRecorder] No preferred type supported, using webm fallback')
     return 'audio/webm' // fallback
   }