Refactor chatbot message handling and formatting

app.py

@@ -75,14 +75,15 @@ with gr.Blocks() as demo:
 
     def update_chatbot(message, chat_history):
         print("Updating chatbot...")
-        # 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"):
+        # Ensure the user's message is not added twice
+        if not chat_history or (chat_history and chat_history[-1]["role"] != "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)
-        # Formate as mensagens para exibição, removendo roles do conteúdo
+        chat_history, _ = chat(chat_history, system_msg.value, max_tokens.value, temperature.value, top_p.value, 40, 1.1)
+        # Format messages for display, removing roles from content
         formatted_chat_history = [(msg["role"], msg["content"]) for msg in chat_history]
         return formatted_chat_history, chat_history, ""
 
+
     submit.click(
         fn=update_chatbot,
         inputs=[message, chat_history_state],