Add to Cart Stepper

1/// An "Add" pill that morphs into a `– 1 +` stepper.2///3/// The same capsule stretches open, the digits roll up or down with4/// `numericText`, a ghost "+1"/"−1" floats away on every change, and the5/// minus becomes a trash can at one item. Back at zero it folds into "Add".6/// Tapping + at the limit shakes the pill with a warning haptic.7public struct AddToCartStepper: View {8    @Binding var quantity: Int9    var maxQuantity: Int10    var colors: [Color]11    var height: CGFloat12    var addTitle: String13​14    @State private var ghostTrigger = 015    @State private var ghostIsIncrement = true16    @State private var limitHits = 017​18    public init(19        quantity: Binding<Int>,20        maxQuantity: Int = 9,21​22// ... (click "Show full code" to see more)