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aiongg
3bda745a52
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.