Expand description
Physics debug-render extraction — opt-in DataSystem.
Lifts the previous PhysicsDebugLane (which was registered as a second
lane on PhysicsAgent and replaced the simulation when active — i.e.
enabling debug overlay also stopped physics) into a side-channel
[crate::ecs::DataSystem] that runs in PostSimulation alongside the
normal physics step. Per CLAD: debug data extraction is a Data-domain
invariant projection, not an alternative agent strategy.
Activation is per-entity via PhysicsDebugData::enabled: when no
entity has the component, the system is a no-op.