Eye/body stabilisation subsystem. Full resource struct + tuning members
(springs/damping/noise/percentages/damage multipliers) reconstructed; the
eye/body dynamics accumulators held in a reserved pad until the per-frame
GyroscopeSimulation is reconstructed (phase 5). Ctor chains PowerWatcher + copies
tuning; statics/dtor/test/reset real; sim staged. BT: 28 ok.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>