Return Toast

The component is self-contained: one file, no dependencies, its own palette in the local --vibeui-toast-013-* variables. The theme comes from the surrounding color-scheme through light-dark(), while the background prop replaces only the card surface. The timer is a conic-gradient whose fraction of the circle is computed from the --vibeui-toast-013-percent variable, and the number of seconds in the centre of the ring duplicates the same value as text, so the countdown is readable both by eye and aloud through aria-live. Hover and focus pause the timer through a ref rather than through a re-render. After "Restore" is pressed the ring turns into a checkmark and the button disappears — the state is held by useState, the component is client-side. Every caption is exposed as a prop: message, returnedMessage, returnLabel, expiredText and the countdownText template with its {seconds} placeholder.