fix(world): restore multi-frame shadow warmup and unblock fabrik doorway

- 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.

src/managers/stores/useDebugVisualsStore.ts

@@ -13,6 +13,8 @@ interface DebugVisualsStore {
   setOctreeLeavesOnly: (value: boolean) => void;
   octreeOpacity: number;
   setOctreeOpacity: (value: number) => void;
+  octreeFabrikOnly: boolean;
+  setOctreeFabrikOnly: (value: boolean) => void;
 }
 
 export const useDebugVisualsStore = create<DebugVisualsStore>((set) => ({
@@ -28,4 +30,6 @@ export const useDebugVisualsStore = create<DebugVisualsStore>((set) => ({
   setOctreeLeavesOnly: (octreeLeavesOnly) => set({ octreeLeavesOnly }),
   octreeOpacity: 0.35,
   setOctreeOpacity: (octreeOpacity) => set({ octreeOpacity }),
+  octreeFabrikOnly: false,
+  setOctreeFabrikOnly: (octreeFabrikOnly) => set({ octreeFabrikOnly }),
 }));