Update app.py

app.py

@@ -68,7 +68,7 @@ def chat(message, history):
     """
     聊天函数，处理用户消息并返回模型响应
     """
-    if not model_loaded or model is None or tokenizer is None:
+    if model is None or tokenizer is None:
         return "❌ 模型未正确加载，请检查Spaces日志获取详细错误信息。"
 
     try: