Confusing blocking behavior and incorrect guidance from ask question tool

Confusing blocking behavior and incorrect guidance from ask question tool related to planning

- pretty sure I was not even in plan mode when I sent the initial request - so confusing that it claimed I was
- edits do sometimes get made while in plan mode from my experience, and if not, it'll usually just create a plan for making those edits. so confusing this was surfaced as a blocker at all
- switching modes in the middle of a session, esp with an active question open like this is not possible
- shift+tab shortcut for switching modes is also outdated for ghcp app - although it may still the case for CLI

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| Field | Value |
| --- | --- |
| App version | 1.0.25 |
| OS | Windows 10.0.26100 |
| Theme | GitHub |
| Path | /chat |
| Tenure | Week 13 |

首先，在 Windows 上使用应用版本 1.0.25 重现 /chat 路径中报告的行为，检查 planning-mode 指引、编辑、活动问题和模式切换。将显示的说明与实际行为进行比较，包括 shift+tab 快捷键。只有当指引和阻塞状态准确反映当前应用行为以及受支持的模式切换时，才算完成。

由索引模型根据 Issue 内容生成。