A selected, unlocked rectangle frame at least 40 px on screen shows the
yellow widget near its top-right corner. Clicking it shows a diamond at
each corner. Dragging a diamond along its edge sets the size of all four
corners as one undo step (Shift: that corner only), clamped to half the
shorter side. Alt-click steps that corner's shape; Shift+Alt-click steps
every corner. Escape, a click on empty canvas, another selection or
another tool ends corner editing. Positions follow the frame's transform.
object.cornerOptions takes corners: four {shape, size} entries. Tools
gain Action::Handled and the LiveCornerWidget/LiveCornerDiamond overlays,
drawn by the canvas in the live_corner theme token. Fixes#186.
Progress docs per craftrules standards/progress-docs.md: target-app parity, gaps, roadmap with alpha gate, readiness by audience (full / mainstream / essentials) with Opus 5.5 hours, and feature, format, hardware, UI and localization parity docs.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
aiongg