Research and implement RR9/RR10: capability-gated WebGPU route/graph aggregation with SVG/Canvas fallback, plus versioned worker messages, cancellation, stale-response rejection, transferable buffers, and deterministic replay export/import.
Roadmap IDs: RR9, RR10
Research and implement RR9/RR10: capability-gated WebGPU route/graph aggregation with SVG/Canvas fallback, plus versioned worker messages, cancellation, stale-response rejection, transferable buffers, and deterministic replay export/import.
Roadmap IDs: RR9, RR10