GPT-5 mini used very bad language.

### Describe the bug

"silently over-written"

### Affected version

Copilot v1.0.62

### Steps to reproduce the behavior

Ask if the untracked files overwrite the tracked files already pushed to the remote repo.

### Expected behavior

Give better information voluntarily. Do not push anything that would overwrite better, newer information. Use accurate words to describe things.

### Additional context

_No response_

No source file or test is identified in the report. Reproduce the behavior in Copilot v1.0.62 by asking whether untracked files overwrite tracked files pushed to the remote repository, then locate the response-generation path and its coverage. Done means the CLI gives accurate, sufficiently explicit information without implying an overwrite that did not occur.

索引モデルが issue の本文から書いたものです。