Add InfoEvent with confirmation

Jugenddienst Stunden/Models/ConfirmationEventArgs.cs

@@ -0,0 +1,21 @@
+
+using System.Threading.Tasks;
+
+namespace Jugenddienst_Stunden.Models;
+public sealed class ConfirmationEventArgs : System.EventArgs {
+	public string Title { get; }
+	public string Message { get; }
+	public string ConfirmText { get; }
+
+	private readonly TaskCompletionSource<bool> _tcs = new();
+
+	public ConfirmationEventArgs(string title, string message, string confirmText = "OK") {
+		Title = title;
+		Message = message;
+		ConfirmText = confirmText;
+	}
+
+	public Task<bool> Task => _tcs.Task;
+
+	public void SetResult(bool result) => _tcs.TrySetResult(result);
+}

Jugenddienst Stunden/ViewModels/LoginViewModel.cs

@@ -1,6 +1,7 @@
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
 using Jugenddienst_Stunden.Interfaces;
+using Jugenddienst_Stunden.Models;
 
 namespace Jugenddienst_Stunden.ViewModels;
 
@@ -15,7 +16,8 @@ public partial class LoginViewModel : ObservableObject {
 	private readonly TimeSpan _detectionInterval = TimeSpan.FromSeconds(5);
 
 	public event EventHandler<string>? AlertEvent;
-	public event EventHandler<string>? InfoEvent;
+	//public event EventHandler<string>? InfoEvent;
+	public event EventHandler<ConfirmationEventArgs>? InfoEvent;
 
 	/// <summary>
 	/// Name der Anwendung
@@ -102,9 +104,13 @@ public partial class LoginViewModel : ObservableObject {
 				(Server ?? string.Empty).Trim());
 
 			Title = $"{user.Name} {user.Surname}";
-			InfoEvent?.Invoke(this, "Login erfolgreich");
+			// Info zeigen und auf Bestätigung warten
-
+			var args = new ConfirmationEventArgs("Information:", "Login erfolgreich");
-			await Shell.Current.GoToAsync("//StundenPage");
+			InfoEvent?.Invoke(this, args);
+			bool confirmed = await args.Task;
+			if (confirmed) {
+				await Shell.Current.GoToAsync("//StundenPage");
+			}
 		} catch (Exception ex) {
 			if (_alerts is not null) {
 				_alerts.Raise(ex.Message);
@@ -128,7 +134,13 @@ public partial class LoginViewModel : ObservableObject {
 			var user = await _auth.LoginWithToken(token);
 			Title = $"{user.Name} {user.Surname}";
 
-			await Shell.Current.GoToAsync("//StundenPage");
+			// Info zeigen und auf Bestätigung warten
+			var infoArgs = new ConfirmationEventArgs("Information:", "Login erfolgreich");
+			InfoEvent?.Invoke(this, infoArgs);
+			bool confirmed = await infoArgs.Task;
+			if (confirmed) {
+				await Shell.Current.GoToAsync("//StundenPage");
+			}
 		} catch (Exception ex) {
 			if (_alerts is not null) {
 				_alerts.Raise(ex.Message);

Jugenddienst Stunden/Views/LoginPage.xaml.cs

@@ -33,7 +33,14 @@ public partial class LoginPage : ContentPage {
 
 		if (BindingContext is LoginViewModel vm) {
 			vm.AlertEvent += async (_, msg) => await DisplayAlert("Fehler:", msg, "OK");
-			vm.InfoEvent += async (_, msg) => await DisplayAlert("Information:", msg, "OK");
+			//vm.InfoEvent += async (_, msg) => await DisplayAlert("Information:", msg, "OK");
+			// Neues InfoEvent: Dialog anzeigen und nach Bestätigung das Result setzen
+			vm.InfoEvent += async (_, infoArgs) => {
+				await MainThread.InvokeOnMainThreadAsync(async () => {
+					await DisplayAlert(infoArgs.Title, infoArgs.Message, infoArgs.ConfirmText);
+					infoArgs.SetResult(true);
+				});
+			};
 		}
 
 		barcodeScannerView.Options =