The spatial-grid manager, scene-store subscriptions, and the viewer
outliner's Object3D arrays are module-level singletons that previously
lived for the whole page lifetime. When an app unmounted the Editor
(e.g. navigating away from the 3D editor and back in an SPA host) they
retained references to the disposed Three.js scene graph, which caused
the app to freeze on re-entry as the stale data was replayed against a
fresh scene.
- initSpatialGridSync now returns the unsubscribe handle from its
scene-store subscription so callers can detach it.
- initializeEditorRuntime becomes reversible: it wires up the spatial
grid, space detection and SFX bus on mount and returns a teardown
closure that detaches both store subscriptions, clears the spatial
grid manager, and truncates the viewer outliner's selected/hovered
arrays in place.
- The Editor component's runtime-init effect now returns that teardown,
so the singletons are reset cleanly every time the Editor unmounts.
- initSFXBus is now idempotent via an internal guard so repeated
Editor mounts do not stack duplicate mitt listeners.
Co-authored-by: Claude <noreply@anthropic.com>
Stair system (full stack):
- New StairNode + StairSegmentNode schemas with flights, landings, L/U-shapes
- StairSystem: geometry generation with throttled per-frame updates
- Stair tool, edit system, panels, tree node, and renderers
- Event bus types, scene registry, and command palette entries
Scene graph utilities:
- cloneLevelSubtree: deep-clone a level with remapped IDs
- forkSceneGraph: clone + strip scan/guide nodes for project forking
Core improvements:
- Read-only mode on scene store (blocks create/update/delete when locked)
- readOnly guards on node-actions and collection actions
- Upload store for scan/guide file upload handling
Viewer state:
- previewSelectedIds for box-select live preview
- hoverHighlightMode (default/delete) for delete-mode hover outline
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>
