Slack Swipe Cards to Read Unread Interaction

This interaction allows users to quickly clear their unread messages using a card stack. Users can swipe right or tap 'Mark as Read' to dismiss a card with a green checkmark overlay, or swipe left/tap 'Keep Unread' to dismiss it with a blue arrow overlay. The cards rotate and slide off-screen elastically based on the drag distance, while the next card in the stack scales up slightly to take its place. A counter at the top tracks the remaining cards, and an 'Undo' button appears in the header for quick recovery.