Update app.py

app.py

@@ -131,7 +131,7 @@ def test_model_availability(api_key, model_name, model_type="chat"):
             json=payload,
             timeout=timeout
         )
-        response.status_code == 200 or response.status_code == 429
+        return response.status_code == 200 or response.status_code == 429
     except requests.exceptions.RequestException as e:
         logging.error(
             f"测试{model_type}模型 {model_name} 可用性失败，"