It would be nice to be able to reset a session without having to first send a...

It would be nice to be able to reset a session without having to first send a message.
I have a use case where I need to run some commands to get my agents setup properly but then I have to just send a dummy message so that I can reset the session and see those agents.

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| Field | Value |
| --- | --- |
| App version | 1.1.12 |
| OS | Windows 10.0.26200 |
| Theme | GitHub |
| Path | /chat |
| Tenure | Week 4 |

从 /chat 会话流程开始，复现报告的操作顺序：运行设置命令，然后在发送消息之前尝试重置。检查在没有任何先前消息的情况下重置的行为；当会话完成重置并反映已配置的代理，且不需要虚拟消息时，即表示完成。

由索引模型根据 Issue 内容生成。