Local trial: more reliable overlapping box openings
A local repair improves box opening when valid requests overlap on the same stack.
- In isolated tests, two overlapping openings with two owned boxes each consumed one box and delivered one reward.
- When only one box remained, one opening succeeded and the other returned the normal empty-stack result without creating another reward.
- This is a local preview. Public release 381 remains in place while live player testing continues. The new repair has not yet been accepted in the game or deployed to public play.