Refactor chat history handling in update_chatbot function

app.py

@@ -99,10 +99,13 @@ with gr.Blocks() as demo:
 
     def update_chatbot(message, chat_history):
         print("Updating chatbot...")
-        chat_history = user(message, chat_history)
+        # Certifique-se de que a mensagem do usuário não seja adicionada duas vezes
+        if not chat_history or (chat_history and chat_history[-1][0] != "user"):
+            chat_history = user(message, chat_history)
         chat_history, _, _ = chat(chat_history, system_msg.value, max_tokens.value, temperature.value, top_p.value, 40, 1.1)
-        chat_history = [msg["content"] for msg in chat_history]
-        return chat_history, chat_history, ""
+        # Formate as mensagens para exibição, removendo roles do conteúdo
+        formatted_chat_history = [(msg["role"], msg["content"]) for msg in chat_history]
+        return formatted_chat_history, chat_history, ""
 
     submit.click(
         fn=update_chatbot,