Toast

Toast shows a brief, non-blocking notification to confirm an action or present temporary information. Use it for scenarios where the user needs feedback but not a decision, such as saving, deleting, or changing a status. For production use, prefer the `useToast()` hook; it handles positioning, stacking, auto-dismiss, and deduplication via `ToastViewport`. Toasts stay within viewport and safe-area gutters, wrap long message content, and enter, exit, or swipe-dismiss toward their configured top or bottom edge. The vertical swipe uses the same spatial model as placement motion: top Toasts leave upward and bottom Toasts leave downward. Swipe waits for dominant edge-directed intent before cancelling native touch movement and reports the existing manual dismissal reason. Pen is supported as direct-contact input; mouse drag is excluded to avoid conflicting with desktop text selection, where the visible close control remains available. Set `isAutoHide: false` explicitly when an action or message must remain available. The `Toast` component renders the visual toast element inline and is useful for previews, documentation, and static showcases where the viewport lifecycle is not needed.