Wallet SwiftUI Screen

Cards overlap with a fixed peek and soft shadows. Tap one and it springs to the top while the rest fan down to the bottom edge with staggered springs, each slightly smaller; drag the front card down, tap it, or tap the fan to return it. Long-press a card in the stack to lift it (larger, deeper shadow, rigid haptic) and drag it to a new slot; the others move out of the way and the card settles with a soft haptic. Each card face is a caller-provided view, and the order is a binding so reordering writes back.

Notes

• States: stacked, pressed (0.98 while a long-press is arming), lifted (1.04 with a 24pt shadow), front, fanned (0.96, tighter peek at the bottom). The fan uses settle.delay(index * 0.03) for the stagger and no delay under Reduce Motion.
• Reorder is a LongPressGesture(0.3s) sequenced before a DragGesture(minimumDistance: 0). The target slot is round(translation / peek); when it changes, the card is moved in the array and the finger offset is adjusted by the slot distance so the card never jumps.
• The front card's downward drag rubber-bands upward and returns when predictedEndTranslation passes 40% of the card height. Gestures switch by state: front card gets tap-or-pull, stacked cards get long-press-or-tap.
• Every card is a VoiceOver button with "Move up" and "Move down" custom actions; the container is labeled "Cards".
• Content is wrapped in AnyView so a heterogeneous list of faces can share one [WalletCard] binding. Keep faces light; the stack renders every card.
• WalletStackExample at the end of WalletStack.swift is the screen shown in the preview; copy it as a starting point.