Implement Gemini audio voice note replies

whatsapp-gateway/baileys-client.js

@@ -288,7 +288,7 @@ async function disconnectSession(session_key) {
 /**
  * Send a message using an active session
  */
-async function sendMessage(session_key, phone, message, mediaUrl = null) {
+async function sendMessage(session_key, phone, message, mediaUrl = null, audioBase64 = null) {
     const sock = sessions.get(session_key);
     if (!sock) {
         throw new Error(`Session ${session_key} is not active or connected`);
@@ -296,6 +296,15 @@ async function sendMessage(session_key, phone, message, mediaUrl = null) {
 
     let jid = phone.includes('@') ? phone : `${phone}@s.whatsapp.net`;
     
+    if (audioBase64) {
+        const buffer = Buffer.from(audioBase64, 'base64');
+        return await sock.sendMessage(jid, { 
+            audio: buffer, 
+            mimetype: 'audio/mp4', 
+            ptt: true 
+        });
+    }
+
     if (mediaUrl) {
         const ext = mediaUrl.split('.').pop().toLowerCase();
         if (['jpg', 'jpeg', 'png', 'webp'].includes(ext)) {