Refactor. Add data layer

BudgetApp/Components/ToastValidator.razor

@@ -1,47 +1,3 @@
 @implements IDisposable
 
-<DataAnnotationsValidator />
-
-@code {
-    [CascadingParameter]
-    private EditContext? CurrentEditContext { get; set; }
-
-    [Inject]
-    private ToastService ToastService { get; set; } = default!;
-
-    private bool validationRequested;
-
-    protected override void OnInitialized()
-    {
-        if (CurrentEditContext is not null)
-        {
-            CurrentEditContext.OnValidationRequested += OnValidationRequested;
-            CurrentEditContext.OnValidationStateChanged += OnValidationStateChanged;
-        }
-    }
-
-    private void OnValidationRequested(object? sender, ValidationRequestedEventArgs e)
-    {
-        validationRequested = true;
-    }
-
-    private void OnValidationStateChanged(object? sender, ValidationStateChangedEventArgs e)
-    {
-        if (!validationRequested || CurrentEditContext is null) return;
-        validationRequested = false;
-
-        foreach (var message in CurrentEditContext.GetValidationMessages())
-        {
-            ToastService.Show(message);
-        }
-    }
-
-    public void Dispose()
-    {
-        if (CurrentEditContext is not null)
-        {
-            CurrentEditContext.OnValidationRequested -= OnValidationRequested;
-            CurrentEditContext.OnValidationStateChanged -= OnValidationStateChanged;
-        }
-    }
-}
+<DataAnnotationsValidator />