I'd like to request a feature to view the project folder structure within the...

I'd like to request a feature to view the project folder structure within the application. Ideally, Copilot Desktop could include a dedicated sidebar for this purpose.

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| Field | Value |
| --- | --- |
| App version | 1.1.3 |
| OS | Windows 10.0.26200 |
| Theme | Fox |
| Path | /chat |
| Tenure | Day 6 (Week 1) |

该 issue 提到了 Copilot Desktop 和 /chat 路径，但没有指定源文件或测试。首先定位桌面聊天视图以及现有的侧边栏或导航入口，然后明确文件夹树的范围和交互。完成标准是能够在专用侧边栏中查看项目文件夹结构。

由索引模型根据 Issue 内容生成。