feat(error-handling): add specific error message for quota exhaustion

routes/chat.py

@@ -3,6 +3,7 @@ import sys
 import logging
 import traceback
 from flask import Blueprint, render_template, request
+from google.api_core.exceptions import ResourceExhausted
 from services.genai_service import configure_genai, list_available_models
 from logs import get_user_history, save_log
 
@@ -62,6 +63,10 @@ def chat(user_id):
 
             save_log(user_id, history, response)
 
+        except ResourceExhausted:
+            logger.warning(f"Cota diária excedida para o modelo {current_model}.")
+            response = "⚠️ A cota gratuita diária se esgotou. Por favor, retorne em 24h."
+
         except Exception as e:
             logger.error(f"Erro CRÍTICO ao usar a IA ({current_model}): {e}")
             logger.error(traceback.format_exc())