Lets a host mount the editor's real editing experience on a bare <Viewer>
without the full <Editor> shell.
editor: export Grid, NodeArrowHandles, MoveTool, ToolManager — the selection
handles, the kind-owned mover, the build-tool host, and the drafting grid that
feeds tools their grid:* pointer events. See the doc comment in index.tsx for
how they cooperate with host camera controls and selection.
viewer: two opt-in, non-persisted presentation flags (both default off, so the
editor and every other consumer are unchanged):
- transparentBackground / <Viewer transparent>: emit premultiplied RGBA masked
by geometry + outline alpha (outputColorTransform off on that path) so the
scene can float on any page background. ACES tone-mapping makes a true-white
opaque background impossible, hence transparency.
- inkOpacity: override the per-mode ink-edge opacity.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
