b363dcf888
Introduce a leafer-ui canvas layer that mirrors rendered nodes and drives viewport, node-drag, and alignment-guide updates imperatively, committing React state on idle via startTransition to keep pan/zoom/drag at 60fps. Wire the imperative viewport through wheel zoom, zoom-to, fit-view, and panning. Add a dedicated crop tool: click a node to auto-detect a color-boundary crop region or drag to preselect one, previewed with an on-canvas draft overlay before entering the crop editor. Route uploads through renderContent so the transparent WebP texture feeds the fast display path. Add node --test coverage for the leafer renderer and color-boundary detection. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>