Deterministic 2-link planar R-R robotic arm reachable workspace intersection with circular-arc tangent seam geometry + PPD = px_w / (2*atan(W / 2*D)) engine (.svg, .dxf, .pdf, .json) built for Apple Studio Display, LG UltraGear, Samsung, Ergotron — zero-upload ephemeral Wasm RAM execution.
Running ephemeral Wasm verification…