Three structurally different variants (Panes / Pages / Ledger), switchable
live, plus a six-state scenario rotator (steady, warming up, habit changed,
stale, no baseline, paused) driving the ADR-0002 section-13 contract and the
four separate ADR-0003 section-8 service facts. Pause/resume/collect suspend
the TUI and run a polkit stand-in on the real terminal to validate tty
passthrough. Headless smoke test + SVG screenshots included.
