A plan selector built on the indicator-tablet rack of a pre-electronic cash register: four columns of ten printed tablets each, all ten always mounted, where changing the reading is a sort — the old tablet drops as the new one springs up, the two crossing mid-column 25ms apart — never a single glyph mutating in place.
npx shadcn@latest add https://design.helpmarq.com/r/indicator-rack.jsonindicator-rack