[Feature]: merge branch支持从diff中挑选特定条目

### Is there an existing issue for the same feature?

- [x] I have checked the existing issues.

### Is your feature request related to a problem?

```Markdown
现在merge只能全量，如果直接整个分支合并回主分支，垃圾记忆也进去了，主分支就被污染了。
```

### Describe the feature you'd like

支持能从 diff 里挑想要的记忆条目，合并回主分支

### Implementation / design notes (optional)

```Markdown

```

### Additional information

_No response_