struct ValidatedDatePicker<Label: View>: View {
    let selection: Binding<Date>
    let range: ClosedRange<Date>?
    let displayedComponents: DatePicker.Components
    let label: () -> Label
    @State private var showingInvalidDateAlert = false
    
    var body: some View {
        DatePicker(selection: Binding(
            get: { selection.wrappedValue },
            set: { newDate in
                if let range = range, range.contains(newDate) {
                    selection.wrappedValue = newDate
                } else {
                    showingInvalidDateAlert = true
                }
            }
        ), displayedComponents: displayedComponents) {
            label()
        }
        .alert("Invalid Date", isPresented: $showingInvalidDateAlert) {
            Button("OK") { }
        } message: {
            Text("Please select a date within the allowed range.")
        }
    }
}