A background file-sync/upload activity rail: a slim vertical conduit where discrete air slugs, injected at the foot every 1.8s, rise at a constant 140px/s and drag a liquid plug immediately ahead of them, depositing into an accumulator basin on arrival. A real airlift-pump slug-flow regime standing in for a generic spinner or looping percentage.
npx shadcn@latest add https://design.helpmarq.com/r/airlift-slug-flow.jsonairlift-slug-flow