A scrim that freezes one region or the whole viewport while work is in flight — delay-gated so short requests never flash, held for a minimum so it never blinks out, and inert underneath so Tab cannot walk into the frozen form.
npx shadcn@latest add @zyeon/loading-overlayZyeon UI limits how often it can be asked, and Loading Overlay hasn't had its turn. Its source will show here once it has.