- Enable EDITOR_LAYER on R3F raycaster for proper hit detection
- Fix polygon editor drag using refs and direct position passing
- Handle pointercancel events and fix pointerId access in polygon editor
- Fix slider undo by reverting to start value before resuming temporal state
- Allow grid:move during camera drag so polygon editor works while panning
- Bump better-auth to ^1.5.2 and turbo to ^2.8.12
- Remove explicit return type on createAuth for better inference
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Reuse the shared PolygonEditor for slab boundary editing with levelY
and surfaceHeight support. Handles render as 3D cylinders that adapt
to slab thickness. Prevent deselection after drag by suppressing
grid:click propagation, and reset preview state on undo/redo.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
