获取不存在的知识库的信息

[create-meng]

当只启用了知识库搜索，但是知识库未勾选任何文件，甚至似乎并没有发起搜索知识库，依然返回了答案 [patho_assistant.json](https://github.com/user-attachments/files/23764656/patho_assistant.json)

[YehongPan]

If you could provide more detailed screenshots of the task, it might help us pinpoint the issue. In addition, the previous testing environment had an issue with default user isolation, which could have caused this situation, but the problem has now been fixed. Finally, you can also check whether it was the memory function that allowed the Agent to successfully answer this question.