hull_grid gains mounted_position, facing_yaw, mirror_rotation and mirror_footprint. The
mount helpers edit the layout buffer and create a tagged weapon-mount object with its row
as a pair; Package derives each mounted row's Position from its object and each mount's yaw
from its row's Rotation, then saves the buffer through _save_layout. The panel gets a
Mounts box and greys a mounted row's x and y. smoke_mounts.py pins the gunboat flank,
derive and remove paths. All commits build.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
42227f3435