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/core/src/hooks/scene-registry/scene-registry.ts

@@ -17,11 +17,20 @@ export const sceneRegistry = {
     slab: new Set<string>(),
     zone: new Set<string>(),
     roof: new Set<string>(),
+    'roof-segment': new Set<string>(),
     scan: new Set<string>(),
     guide: new Set<string>(),
     window: new Set<string>(),
     door: new Set<string>(),
   },
+
+  /** Remove all entries. Call when unloading a scene to prevent stale 3D refs. */
+  clear() {
+    this.nodes.clear()
+    for (const set of Object.values(this.byType)) {
+      set.clear()
+    }
+  },
 }
 
 export function useRegistry(

packages/core/src/hooks/spatial-grid/spatial-grid-manager.ts

@@ -273,15 +273,19 @@ export function wallOverlapsPolygon(
 }
 
 export class SpatialGridManager {
-  private floorGrids = new Map<string, SpatialGrid>() // levelId -> grid
-  private wallGrids = new Map<string, WallSpatialGrid>() // levelId -> wall grid
-  private walls = new Map<string, WallNode>() // wallId -> wall data (for length calculations)
-  private slabsByLevel = new Map<string, Map<string, SlabNode>>() // levelId -> (slabId -> slab)
-  private ceilingGrids = new Map<string, SpatialGrid>() // ceilingId -> grid
-  private ceilings = new Map<string, CeilingNode>() // ceilingId -> ceiling data
-  private itemCeilingMap = new Map<string, string>() // itemId -> ceilingId (reverse lookup)
+  private readonly floorGrids = new Map<string, SpatialGrid>() // levelId -> grid
+  private readonly wallGrids = new Map<string, WallSpatialGrid>() // levelId -> wall grid
+  private readonly walls = new Map<string, WallNode>() // wallId -> wall data (for length calculations)
+  private readonly slabsByLevel = new Map<string, Map<string, SlabNode>>() // levelId -> (slabId -> slab)
+  private readonly ceilingGrids = new Map<string, SpatialGrid>() // ceilingId -> grid
+  private readonly ceilings = new Map<string, CeilingNode>() // ceilingId -> ceiling data
+  private readonly itemCeilingMap = new Map<string, string>() // itemId -> ceilingId (reverse lookup)
 
-  constructor(private cellSize = 0.5) {}
+  private readonly cellSize: number
+
+  constructor(cellSize = 0.5) {
+    this.cellSize = cellSize
+  }
 
   private getFloorGrid(levelId: string): SpatialGrid {
     if (!this.floorGrids.has(levelId)) {

packages/core/src/hooks/spatial-grid/spatial-grid.ts

@@ -9,10 +9,14 @@ interface SpatialGridConfig {
 }
 
 export class SpatialGrid {
-  private cells = new Map<CellKey, GridCell>()
-  private itemCells = new Map<string, Set<CellKey>>() // reverse lookup
+  private readonly cells = new Map<CellKey, GridCell>()
+  private readonly itemCells = new Map<string, Set<CellKey>>() // reverse lookup
 
-  constructor(private config: SpatialGridConfig) {}
+  private readonly config: SpatialGridConfig
+
+  constructor(config: SpatialGridConfig) {
+    this.config = config
+  }
 
   private posToCell(x: number, z: number): [number, number] {
     return [Math.floor(x / this.config.cellSize), Math.floor(z / this.config.cellSize)]
@@ -75,7 +79,7 @@ export class SpatialGrid {
       if (!this.cells.has(key)) {
         this.cells.set(key, { itemIds: new Set() })
       }
-      this.cells.get(key)!.itemIds.add(itemId)
+      this.cells.get(key)?.itemIds.add(itemId)
     }
   }
 

packages/core/src/hooks/spatial-grid/wall-spatial-grid.ts

@@ -49,8 +49,8 @@ function autoAdjustYPosition(
 }
 
 export class WallSpatialGrid {
-  private wallItems = new Map<string, WallItemPlacement[]>() // wallId -> placements
-  private itemToWall = new Map<string, string>() // itemId -> wallId (reverse lookup)
+  private readonly wallItems = new Map<string, WallItemPlacement[]>() // wallId -> placements
+  private readonly itemToWall = new Map<string, string>() // itemId -> wallId (reverse lookup)
 
   /**
    * Check if an item can be placed on a wall with auto-adjustment for vertical position
@@ -152,7 +152,7 @@ export class WallSpatialGrid {
     if (!this.wallItems.has(wallId)) {
       this.wallItems.set(wallId, [])
     }
-    this.wallItems.get(wallId)!.push(placement)
+    this.wallItems.get(wallId)?.push(placement)
     this.itemToWall.set(itemId, wallId)
   }