A plan-change proration panel drawn as a draper cutting cloth: the used billing period dims and stays, the unused remnant slides into the new plan's row re-measured against its rate, and the cents lost to rounding render as a labelled sliver at the cut instead of vanishing into a footnote.
pnpm dlx shadcn@latest add "https://design.helpmarq.com/r/remnant-cut.json"