在NavigationLink的嵌套NavigationView中列出CoreData对象的正确方法

import SwiftUI
import CoreData

struct ContentView: View {
    @Environment(\.managedObjectContext) private var viewContext
    
    @FetchRequest(
        sortDescriptors: [NSSortDescriptor(keyPath: \Item.timestamp, ascending: true)],
        animation: .default)
    private var items: FetchedResults<Item>
    
    var body: some View {
        NavigationView {
            List {
                ForEach(items) { item in
                    NavigationLink(destination: DetailView(item: item)) {
                        Text(item.name ?? "Unknown")
                    }
                }
            }
            .navigationTitle("Items")
        }
    }
}

struct DetailView: View {
    var item: Item
    
    var body: some View {
        Text(item.details ?? "No details available")
            .padding()
    }
}