Compose e-commerce / marketplace UI in SwiftUI from primitives (no Apple "commerce kit") — product grids with LazyVGrid + GridItem(.adaptive), a pinch-zoom gallery via MagnifyGesture + scaleEffect, an image carousel with TabView(.page), a multi-step booking wizard anchored on .sheet(item:) + presentationDetents, filter chips, and a payment redirect that opens the provider's checkout in SFSafariViewController (never WKWebView, never a custom URL scheme). iOS 26 adds Liquid Glass on CTAs/filters. Use when building product cards, a gallery, a booking/checkout flow, or wiring a hosted payment redirect the secure, Apple-recommended way.
