paint.freeform.addPoint/setPoint/deletePoint/addLine/splitLine/selectPoint
and the paint.freeform.get query edit the freeform gradient behind the active
proxy (one undo step each; errors on other paints). The session keeps the
selected point. The Gradient tool on a freeform gradient selects and drags
points, adds points on the art (joined in Lines mode) and on lines, and
deletes the selected point. The Gradient panel shows the Draw toggle and the
selected point's colour, opacity, spread and Delete Point; the Color panel
recolours the selected point.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>