"Scheduled" pill does not behave the same as other pills

### Short summary

The "Scheduled" pill looks the same as the "Background" and "Artifacts" pills, but is not clickable while the others are. Suggest either making "Scheduled" clickable (with an option to cancel a scheduled task) or changing its appearance.

### Affected version or release

1.0.21

### Installation context

_No response_

### What happened?

The "Scheduled" pill looks the same as the "Background" and "Artifacts" pills, but is not clickable while the others are. Suggest either making "Scheduled" clickable (with an option to cancel a scheduled task) or changing its appearance.

### Steps to reproduce

1. Schedule a task
2. "Scheduled" pill appears above prompt window
3. Attempt to click on pill
4. Nothing happens

### Expected behavior

Expect to be able to interact with the scheduled task.

### Additional context

_No response_

Start by locating the UI implementation for the “Scheduled” pill and compare it with the “Background” and “Artifacts” pills. Reproduce the scheduling flow described in the issue, then make the scheduled state either interactable or visually distinct; done means its behavior and appearance no longer imply conflicting affordances.

索引モデルが issue の本文から書いたものです。