- Create ReasonPrompt dialog for capturing optional reasons
- Add quick tag buttons (Blocking, Urgent, Context switch, etc.)
- Support keyboard navigation (Escape to cancel)
- Handle text input with trimming and null for empty
- Different titles for different actions (set_focus, defer, skip)
- All 10 tests pass
Closes bd-2p0
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
