refactor: release-review cleanup for roof wall openings

Dual review pass (Claude multi-angle + Codex release-quality). One
correctness fix and the agreed do-now cleanups:

- fix: clone-scene-graph remaps roofSegmentId like wallId in both
  clone paths — duplicated scenes/levels kept pointing roof-hosted
  children at the original segments.
- extract the settled, stateless roof target/cursor math shared by the
  four door/window tools into shared/roof-wall-opening-placement.ts
  (resolveRoofWallOpeningTarget + getRoofWallOpeningCursorPose +
  worldToSelectedBuildingLocal); tools keep the stateful lifecycle
  (drafts, undo/temporal, commit field lists). −199 net lines.
- rename host-generic state: currentWallId→currentHostId,
  markWallDirty→markHostDirty (they hold segment ids too); capability
  cascadesViaHostSegment→dirtyHandledByOwnSystem (behavior-facing,
  before the public API hardens).
- drop getRoofAccessoryKinds from core's public API — its only caller
  was the standalone Build tab, which now enumerates the registry
  inline with its app-specific filter.
- window move-tool uses the shared stripPlacementMetadataFlags; stale
  "segment-local" comment fixed.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

packages/editor/src/components/editor/node-arrow-handles.tsx

@@ -55,6 +55,7 @@ import {
   NO_RAYCAST,
 } from './handles/handle-arrow'
 import { type HandleDragControls, useHandleDrag } from './handles/use-handle-drag'
+
 // Pooled scratch for the handle rig's world-relative pose mapping.
 const _rigRelative = new Matrix4()
 const _rigScratchScale = new Vector3()

packages/editor/src/components/tools/item/placement-strategies.ts

@@ -363,7 +363,7 @@ type RoofWallTarget = {
   segment: RoofSegmentNode
   faceId: RoofWallFaceId
   faceYaw: number
-  /** Stored node position: segment-local, y = bottom edge. */
+  /** Stored node position: FACE-LOCAL, y = bottom edge. */
   position: [number, number, number]
   /** Face-coord center of the placed rect (for the overlap guard). */
   centerU: number

packages/editor/src/components/tools/item/use-placement-coordinator.tsx

@@ -1062,9 +1062,8 @@ export function usePlacementCoordinator(config: PlacementCoordinatorConfig): Rea
           // push (z = thickness/2 off the face frame's mid-plane) so the
           // drag preview doesn't sink into the wall until commit.
           if (asset.attachTo === 'wall-side' && placementState.current.roofSegmentId) {
-            const segment = useScene.getState().nodes[
-              placementState.current.roofSegmentId as AnyNodeId
-            ]
+            const segment =
+              useScene.getState().nodes[placementState.current.roofSegmentId as AnyNodeId]
             if (segment?.type === 'roof-segment') {
               mesh.position.z = (segment.wallThickness ?? 0.1) / 2
             }