A notification bell whose clapper physically rings: arrivals add an impulse to a damped harmonic oscillator swinging the clapper and recoiling the bell body, bursts read as one cumulative swing rather than N separate dings, and opening the tray damps the bell to rest and drains the badge.
pnpm dlx shadcn@latest add "https://design.helpmarq.com/r/notification-bell-swing.json"