[General] Native dev container integration?

**Mood:** 😊
**Category:** General

Native dev container integration? Is there built-in dev container support alongside worktree sessions? I had to set one up locally and manually tell the agent to operate inside it. This seems like a natural fit, especially with cloud sessions. Let me know if I missed it.

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| Field | Value |
| --- | --- |
| App version | 0.2.34 |
| OS | Windows 10.0.26200 |
| Theme | GitHub |
| Path | /chat |
| Tenure | Week 2 |

未指定实现文件或测试。首先检查当前如何处理 worktree 会话、云会话和 agent，然后明确预期的内置 dev-container 行为，以及如何在这些会话类型中验证支持情况。

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