[Feature] It is recommended to refer to cherry studio. Each conversation has separate regeneration, copy and delete operations.

### MaxKB Version

v2.2.1

### Please describe your needs or suggestions for improvements

建议参考cherry studio，每个对话都有单独的重新生成复制、删除操作
<img width="1449" height="912" alt="Image" src="https://github.com/user-attachments/assets/03e09901-9b4b-4f4c-83c8-42fb4eddd95e" />

### Please describe the solution you suggest

_No response_

### Additional Information

_No response_