Pure computation library (spider-3d.ts) with polar mesh generation,
overlap detection via point-in-polygon sampling, and membrane preset
mapping SpaceConnections to FlowKind axes. FolkShape component
(folk-spider-3d.ts) renders CSS 3D-transformed stacked SVG layers
with interactive orbit, dataset toggling, and demo data fallback.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
