* Fix per-character text fill colors and vector region loop direction
* Replace rotation handle with corner rotation zones
Remove the rotation handle circle/stem above the selection bounding box.
Rotation is now triggered from corner zones outside resize handles,
matching Figma's behavior. Cursor uses native CSS directional arrows
(n-resize, ne-resize, etc.) that rotate with the node, avoiding
cross-platform SVG cursor issues.
b3cbf227e6
