Fix realtime undo updates for wall and fence moves

packages/core/src/index.ts

@@ -54,6 +54,12 @@ export {
   type ItemInteractiveState,
   useInteractive,
 } from './store/use-interactive'
+export {
+  getSceneHistoryPauseDepth,
+  pauseSceneHistory,
+  resetSceneHistoryPauseDepth,
+  resumeSceneHistory,
+} from './store/history-control'
 export { default as useLiveTransforms, type LiveTransform } from './store/use-live-transforms'
 export { FenceSystem } from './systems/fence/fence-system'
 export { clearSceneHistory, default as useScene } from './store/use-scene'

packages/core/src/lib/space-detection.ts

@@ -4,6 +4,11 @@ import {
   isCurvedWall,
 } from '../systems/wall/wall-curve'
 import { CeilingNode, SlabNode, type CeilingNode as CeilingNodeType, type SlabNode as SlabNodeType, type WallNode } from '../schema'
+import {
+  getSceneHistoryPauseDepth,
+  pauseSceneHistory,
+  resumeSceneHistory,
+} from '../store/history-control'
 import { simplifyClosedPolygon } from './polygon-geometry'
 
 type Point2D = { x: number; y: number }
@@ -855,6 +860,7 @@ export function initSpaceDetectionSync(sceneStore: any, editorStore: any): () =>
 
   const unsubscribe = sceneStore.subscribe((state: any) => {
     if (isProcessing) return
+    if (getSceneHistoryPauseDepth() > 0) return
 
     const nodes = state.nodes
     const wallsByLevel = new Map<string, WallNode[]>()
@@ -889,11 +895,11 @@ export function initSpaceDetectionSync(sceneStore: any, editorStore: any): () =>
     }
 
     isProcessing = true
-    sceneStore.temporal.getState().pause()
+    pauseSceneHistory(sceneStore)
     try {
       runSpaceDetection([...levelsToUpdate], sceneStore, editorStore, nodes)
     } finally {
-      sceneStore.temporal.getState().resume()
+      resumeSceneHistory(sceneStore)
       previousSnapshots.clear()
       for (const [levelId, snapshot] of currentSnapshots.entries()) {
         previousSnapshots.set(levelId, snapshot)

packages/core/src/store/history-control.ts

@@ -0,0 +1,36 @@
+let sceneHistoryPauseDepth = 0
+
+type TemporalStoreLike = {
+  temporal: {
+    getState(): {
+      pause(): void
+      resume(): void
+    }
+  }
+}
+
+export function pauseSceneHistory(sceneStore: TemporalStoreLike): void {
+  if (sceneHistoryPauseDepth === 0) {
+    sceneStore.temporal.getState().pause()
+  }
+  sceneHistoryPauseDepth += 1
+}
+
+export function resumeSceneHistory(sceneStore: TemporalStoreLike): void {
+  if (sceneHistoryPauseDepth === 0) {
+    return
+  }
+
+  sceneHistoryPauseDepth -= 1
+  if (sceneHistoryPauseDepth === 0) {
+    sceneStore.temporal.getState().resume()
+  }
+}
+
+export function getSceneHistoryPauseDepth(): number {
+  return sceneHistoryPauseDepth
+}
+
+export function resetSceneHistoryPauseDepth(): void {
+  sceneHistoryPauseDepth = 0
+}

packages/core/src/store/use-scene.ts

@@ -11,6 +11,7 @@ import { SiteNode } from '../schema/nodes/site'
 import { StairNode as StairNodeSchema } from '../schema/nodes/stair'
 import { StairSegmentNode as StairSegmentNodeSchema } from '../schema/nodes/stair-segment'
 import type { AnyNode, AnyNodeId } from '../schema/types'
+import { resetSceneHistoryPauseDepth } from './history-control'
 import * as nodeActions from './actions/node-actions'
 
 function getFiniteNumber(value: unknown, fallback: number) {
@@ -628,6 +629,7 @@ let prevNodesSnapshot: Record<AnyNodeId, AnyNode> | null = null
 
 export function clearSceneHistory() {
   useScene.temporal.getState().clear()
+  resetSceneHistoryPauseDepth()
   prevPastLength = 0
   prevFutureLength = 0
   prevNodesSnapshot = null
@@ -647,8 +649,9 @@ useScene.temporal.subscribe((state) => {
     // Capture the previous snapshot before RAF fires
     const snapshotBefore = prevNodesSnapshot
 
-    // Use RAF to ensure all middleware and store updates are complete
-    requestAnimationFrame(() => {
+    // Defer to a microtask so the scene store has settled before we diff,
+    // but still mark walls/items dirty before the next paint.
+    queueMicrotask(() => {
       const currentNodes = useScene.getState().nodes
       const { markDirty } = useScene.getState()