Enhance whatsapp_webhook to generate and send voice prompts based on LLM replies.

app.py

@@ -402,7 +402,10 @@ async def whatsapp_webhook(request: Request):
         return {"success": True}
 
     # Fallback → voice reply
-    task_queue.put({"type":"audio","message_id":mid,"chat_id":chat_id,"prompt":body})
+    reply = generate_llm(body)
+    client.send_message(mid, chat_id, reply)
+    voice_prompt = f"Speak only this dialog: {reply}"
+    task_queue.put({"type":"audio","message_id":mid,"chat_id":chat_id,"prompt":voice_prompt})
     return {"success": True}
 
 @app.get("/", response_class=PlainTextResponse)