sceneAuthoring.rejectChanges

The drop half of the scene-change contract. Rejected changes never enter the scene; the live objects stay live for this session and are hidden from later reviews so they stop nagging. Each rejected change is taken back out of the scene's pending set, so the publication gate that refuses a commit while a scene carries unbaked entity edits reads the scene as settled. A rejected REMOVAL keeps the entity in the scene: the despawn holds for this session, and the entity is there again on the next load. Rejecting takes a selection — numbered items, entity names, name parts, or group labels — or the whole review with no argument.