User cancelled: do NOT apply the edit; re-sync the active tooth's controls from stored state so the control the user just changed snaps back (no stale UI), then notify (refresh + close the modal). No-op when nothing is pending.
User cancelled: do NOT apply the edit; re-sync the active tooth's controls from stored state so the control the user just changed snaps back (no stale UI), then notify (refresh + close the modal). No-op when nothing is pending.