如何让SwiftUI SidebarMenu每次都显示相同的DetailView，而不是创建一个新的(在macOS上)

import SwiftUI

struct ContentView: View {
    @State private var selectedMenuItem: MenuItem? = nil
    
    var body: some View {
        NavigationView {
            List {
                ForEach(MenuItem.allCases, id: \.self) { item in
                    NavigationLink(destination: DetailView(selectedMenuItem: $selectedMenuItem)) {
                        Text(item.rawValue)
                    }
                }
            }
            .listStyle(SidebarListStyle())
            
            if let selectedItem = selectedMenuItem {
                DetailView(selectedMenuItem: $selectedItem)
            } else {
                Text("Select a menu item")
                    .frame(maxWidth: .infinity, maxHeight: .infinity)
            }
        }
    }
}

struct DetailView: View {
    @Binding var selectedMenuItem: MenuItem
    
    var body: some View {
        VStack {
            Text(selectedMenuItem.rawValue)
                .font(.largeTitle)
            
            // Add your content here
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity)
    }
}

enum MenuItem: String, CaseIterable {
    case item1
    case item2
    case item3
    // Add more menu items if needed
}