sync: update core and viewer from monorepo (#143)

Major changes:
- Roof system rewrite with roof-segment support
- Scene store refactor
- Spatial grid improvements
- Item light system
- Post-processing and selection manager updates
- Perf monitor component

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/viewer/src/hooks/use-node-events.ts

@@ -13,6 +13,8 @@ import {
   type LevelNode,
   type RoofEvent,
   type RoofNode,
+  type RoofSegmentEvent,
+  type RoofSegmentNode,
   type SiteEvent,
   type SiteNode,
   type SlabEvent,
@@ -37,6 +39,7 @@ type NodeConfig = {
   slab: { node: SlabNode; event: SlabEvent }
   ceiling: { node: CeilingNode; event: CeilingEvent }
   roof: { node: RoofNode; event: RoofEvent }
+  'roof-segment': { node: RoofSegmentNode; event: RoofSegmentEvent }
   window: { node: WindowNode; event: WindowEvent }
   door: { node: DoorNode; event: DoorEvent }
 }