struct ContentView: View {
    @State private var items: [String] = []
    @State private var errorMessage: String?
    
    var body: some View {
        NavigationView {
            List(items, id: \.self) { item in
                Text(item)
            }
            .refreshable {
                await refreshData()
            }
            .alert("Error", isPresented: .constant(errorMessage != nil)) {
                Button("OK") { errorMessage = nil }
            } message: {
                Text(errorMessage ?? "")
            }
            .navigationTitle("Items")
        }
    }
    
    private func refreshData() async {
        do {
            // Simulate network call
            try await Task.sleep(nanoseconds: 1_000_000_000)
            items = await fetchItems()
            errorMessage = nil
        } catch {
            errorMessage = "Failed to refresh: \(error.localizedDescription)"
        }
    }
    
    private func fetchItems() async -> [String] {
        // Your actual data fetching logic
        return ["Item 1", "Item 2", "Item 3"]
    }
}