RemoveFromQueue previously gated cascade on PlanningPhase != None,
leaving manually-built chains stuck if their parent had no planning
phase. The handler now matches the X button's HasQueuedSubtasks gate:
queued children are unqueued and unblocked regardless of the parent's
planning phase.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
