深色主题知识库显示有问题

<img width="989" height="857" alt="Image" src="https://github.com/user-attachments/assets/cbc0a9d1-db7c-4368-8fe0-102bfda091b3" />

<img width="846" height="815" alt="Image" src="https://github.com/user-attachments/assets/4fe30fd6-8487-49c6-b24e-b5bd341313f5" />
深色主题显示太糊了