Bosses Unleashed [Unofficial Port]

Fixed the Celestial Jellyfish encounter breaking when players leave or change dimensions during the fight. This is an issue in the forge version that I was unaware of, it is now fixed. The boss now safely cancels interrupted attacks, clears stuck teleport/invincibility states, removes orphaned clones, and recovers correctly after the arena unloads—all while preserving its current health and phase.