Release v0.4.0 — 2D/3D Decoupling, UX Parity, Crash Fixes · pascalorg/editor

Architecture

useLiveTransforms store — New lightweight Zustand store in @pascal-app/core that holds ephemeral node positions during drag operations. Decouples the 2D floorplan panel from the 3D scene graph. The floorplan no longer imports from Three.js.
Enables future standalone 2D mode and bidirectional split-view editing.

2D stair rendering with tread lines and direction arrows in the floorplan
Item footprint rendering in floorplan with rotated bounding boxes and diagonal cross marks
Selection highlight system — indigo/purple tint on selected meshes in 3D
Delete tool UX — D key shortcut, red material hover, floating trash cursor badge
Furnish mode (F key) and Zone mode (Z key) in the action bar
Upload + delete for guides/scans in view toggles
Stair/stair-segment support in the floating action menu (select, duplicate, delete, move)
Box-select now includes stair nodes (bounding box intersection)
Slider precision adapts to modifier key step size (shift/alt)
Editor layout redesign v2 with 3D box select
Infinity dragging slider via PointerLock API
Stair system, scene graph utilities, read-only mode

Fix three-mesh-bvh crash from materialIndex overflow (Sentry EDITOR-M/B, 7,600 events)
Camera controls null guards — prevents crash on setLookAt/getTarget/moveTo (Sentry EDITOR-G)
Pointer lock feature detection for Facebook/Instagram in-app browsers (Sentry EDITOR-6)
Suppress THREE.Clock deprecation warning from R3F 9.x
Fix stair elevations syncing with floor slabs
Release scene singletons on Editor unmount
Wall-side item bounding box offset fix

Full Changelog: v0.3.3...v0.4.0