【BUG】diff not respecting .gitignore_global settings

## Summary

The `diff` output is displaying files and changes that should be ignored according to the `.gitignore_global` configuration.

```bash
git config --get core.excludesfil
```

<img width="349" height="47" alt="Image" src="https://github.com/user-attachments/assets/7b268795-e189-4ad1-8a31-283bc9cab067" />