This is a 20-minute live coding exercise. Using only Combine, build a two-screen SwiftUI app that fetches a list from an API, shows it, and navigates to a detail screen when an item is tapped. How do you set up the view model and state to start?
Put a @Published state enum (idle/loading/loaded/failed) in an ObservableObject view model, have the view own it with @StateObject and call load from .task. The detail screen only displays the model it receives, so it has no view model.
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