Fix reconnect logic and audio mimetype support

backend/app/Controllers/WhatsAppController.php

@@ -340,6 +340,7 @@ class WhatsAppController extends BaseController
 
             $replyText = null;
             $replyAudio = null;
+            $replyAudioMimeType = null;
 
             if ($rule['trigger_type'] === 'keyword') {
                 if (empty($incomingText)) {
@@ -413,6 +414,7 @@ class WhatsAppController extends BaseController
                         );
                         if ($audioResponse && !empty($audioResponse['audio'])) {
                             $replyAudio = $audioResponse['audio'];
+                            $replyAudioMimeType = $audioResponse['mimeType'] ?? 'audio/mp4';
                             $replyText = '[صوت من الذكاء الاصطناعي]';
                         } else {
                             // Fallback to text output from audio
@@ -462,6 +464,9 @@ class WhatsAppController extends BaseController
                 ];
                 if (!empty($replyAudio)) {
                     $payloadData['audio'] = $replyAudio;
+                    if (!empty($replyAudioMimeType)) {
+                        $payloadData['mimetype'] = $replyAudioMimeType;
+                    }
                 } else {
                     $payloadData['message'] = $replyText;
                 }