Please allow copying a session's ID via the context menu when right-clicking ...

Please allow copying a session's ID via the context menu when right-clicking on a session name. Also, including the "/session id" command as available in the CLI would be very helpful

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| Field | Value |
| --- | --- |
| App version | 1.0.21 |
| OS | Windows 10.0.26220 |
| Theme | Django Reborn Again |
| Path | /chat |
| Tenure | Day 1 |

从 /chat session-name UI 开始，跟踪上下文菜单操作，然后定位 CLI 对会话命令的命令处理逻辑。完成的标准是上下文菜单可以复制所选会话 ID，并且 CLI 提供可正常工作的 /session id 命令；在 Windows 上或相关的 UI 和 CLI 测试中验证这两个流程。

由索引模型根据 Issue 内容生成。