[TUI] Ability to click on enqueued entry to edit it

### Describe the feature or problem you'd like to solve

It's hard to know how to adjust already enqueued message, clicking doesn't work

### Proposed solution

The TUI generally understands mouse clicks for bunch of stuff. Clicking enqueued message to adjust it isn't one of these. Support it.

### Example prompts or workflows

_No response_

### Additional context

- Enqueue a message
- Click on the enqueued entry

Expected:
Enqueued message moves to prompt edit, allows you to adjust it, remove, re-enqueue (at original position)

首先追踪 TUI 对已入队条目的鼠标点击处理以及 prompt 编辑路径。验证 issue 中描述的工作流：点击一条已入队的消息会打开该消息以供编辑，并允许将其移除或重新入队到原来的位置。

由索引模型根据 Issue 内容生成。