- Lighting: replace single-frame needsUpdate with a 3-rAF warmup that forces
scene.updateMatrixWorld + sun.shadow.needsUpdate + gl.shadowMap.needsUpdate.
This restores the SceneShadowWarmup behaviour (deleted in 777e51e) inline,
so shadows survive Physics Suspense remounts and webglcontextrestored.
- octreeCollisionConfig: remove (comment out) the thin LA_FABRIK interior box
at x=-6.93 that was sealing the doorway despite the mesh hole; fabrik mesh
octree already provides surrounding wall collision.
- DebugOctreeVisualization: add Fabrik-only filter to inspect interior
collisions/non-collisions in isolation.
Tom Boullay