Preserve Cameron's selected whole-flow and close-material references, assign them distinct silhouette and internal-circulation roles, and reject the current constant-radius white extrusion. Literal negative-space topology remains undecided. Defense: wiki/interface/thought-fluid.md owns how Thought renders and moves. This amendment keeps route and quantity tied to sim readouts while making pressure lobes, surface-tension recoil, and internal marbling the close presentation target.