2026-May-09 - 2.7.15528

fix(placement): resolve undo bug for fighters moved to carriers (#14385)

Fix incorrect handling of undo when a fighter is placed on
a factory, then a carrier placed next to the factory, and
the fighter moved onto the carrier. Previously, if you
did an undo the fighter, essentially nothing happened
(except you could place the fighter again).

This update changes the behavior to force you to undo
the carrier placement first, which then aligns correct
behavior. The carrier is removed, the fighter is put
back to the factory, and then an undo the fighter
removes it properly.

Fixes #8434