Resize and rotation handlers in folk-shape.ts passed raw event.clientX/Y
(screen coordinates) to toLocalSpace/angleFromOrigin, but those methods
expect canvas-parent coordinates. With any zoom/pan, the two coordinate
systems diverge, making resize non-functional and rotation erratic.
Added #screenToParent() to convert viewport coords to the parent's
coordinate space using getBoundingClientRect + parent scale. Applied to:
- Resize handle drag (pointermove → toLocalSpace)
- Rotation start (pointerdown → angleFromOrigin)
- Rotation drag (pointermove → angleFromOrigin)
Also syncs ghost placeholder size with zoom changes so the dotted
preview stays accurate if user zooms while in placement mode.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Jeff Emmett
aeb9247f96