[Bug] Dangerous git checkout command wipes user files without confirmation

**Bug Description**
Bug report drafted: Ran `git checkout -- .` with a dirty tree and wiped the user's u… │
│ │ - What happened: While moving a UI prototype onto a throwaway branch, the model ran git branch X, git stash push -- , then git checkout X -- .. …

**Environment Info**
- Platform: linux
- Terminal: tmux
- Version: 2.1.274
- Feedback ID: bfe5732f-ec5e-4f9d-be06-b5531f70c978

**Errors**
```json
[]
```

The report names no files, tests, or entry points. Reproduce the listed branch, stash, and checkout sequence in a disposable repository, then trace the git command execution and confirmation path. Done means a destructive checkout is not run without explicit user confirmation.

Written by the indexing model from the issue text.