I sometimes get this message "This repository uses Git LFS but git-lfs is not...

I sometimes get this message "This repository uses Git LFS but git-lfs is not installed. Install it with: brew install git-lfs && git lfs install (macOS) or visit https://git-lfs.com for other platforms." which seems odd given this is running on Windows and brew isn't an option. It would be far better if this message was contextual to the platform that Copilot was running on.

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| Field | Value |
| --- | --- |
| App version | 1.1.10 |
| OS | Windows 10.0.26100 |
| Theme | GitHub |
| Path | /chat |
| Tenure | Week 6 |

从 /chat 体验开始，在 Windows 10 上重现 Git LFS 警告，并找到缺少 git-lfs 时显示的消息。更新措辞，使其反映正在使用的平台，然后验证 Windows 不再推荐 Homebrew，且其他平台的指导仍然适用。

由索引模型根据 Issue 内容生成。