fix: update gemini model version and add sys import

routes/chat.py

@@ -1,4 +1,5 @@
 import re
+import sys
 from flask import Blueprint, render_template, request
 from services.genai_service import configure_genai
 from logs import get_user_history, save_log

services/genai_service.py

@@ -18,7 +18,7 @@ def configure_genai():
 
     try:
         genai.configure(api_key=api_key)
-        model = genai.GenerativeModel("gemini-1.5-flash")
+        model = genai.GenerativeModel("gemini-1.5-flash-001")
         print("✅ Chave da API configurada com sucesso.")
         return model