Ship.Update reads Turn and feeds the rotation thrusters and aether drives; it no longer reads the
look direction or snaps Direction toward it. Steering.Toward is the one law from heading to demand
(a heading astern now turns at full demand). HelmInput owns the face-the-aim state. Accelerate,
Combat and MoveTo write Turn through Steering.Toward. Entity.LookDirection is renamed Aim in the
simulation, the Unity readers and the tests. Unity player input follows in the next commit.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
