Fix SwiftUI App issue and Submit to Apple

I need a seasoned iOS engineer who can turn an e-commerce concept into a production-ready SwiftUI application. Your mission is to build the entire customer journey—from the first launch screen to the final checkout—using modern SwiftUI patterns, Combine, and Core Data (or another persistence layer you recommend).

The project starts with a short discovery call where we’ll review the product catalogue structure, decide on key flows, and agree on API contracts. From there, you’ll set up a clean Xcode workspace, implement the UI, wire it to live data, and handle all states (loading, empty, error) gracefully. Consistent accessibility, smooth animations, and responsive layouts across iPhone sizes are essential.

Deliverables
• Complete SwiftUI Xcode project with readable, modular code
• A signed-off TestFlight build ready for external testing
• Lightweight README covering setup, build steps, and any third-party libraries used

If you have prior examples of SwiftUI storefronts or checkout experiences, please share them when you bid.