Add pathPenSettingsForNode / pathPenSettingsToShapeStyle so the Pen
tool controls can display and edit the selected path node's stroke
color and width in screen space, and let CanvasPathEditor re-apply
fill/stroke/opacity to the mounted leafer path when the node's style
changes during editing.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
- Implemented CanvasPathEditor component for editing paths on the canvas.
- Created editablePath module to handle path data manipulation and conversion to SVG.
- Introduced pathPen module for managing path drawing with a pen tool, including anchor management and path data generation.
- Added tests for editablePath and pathPen functionalities to ensure correctness of path editing and drawing behavior.
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