- Reset all task step statuses to pending and set currentStep to 0 when moving from in-progress, in-review, or done back to todo/triage
- Reset checked boxes in PROMPT.md on reopen so execution checklists match the reset step state
- Keep reopen cleanup scoped to reopen transitions while preserving existing behavior for non-reopen moves
- Add targeted store tests covering reopen paths, prompt checkbox reset, and no-op behavior for tasks without steps
Fusion-Task-Id: FN-2966