feat(ui): constrain decimal input and add stacked timed toasts with uniform actions

src/Duempelkas.App/Pages/Accounts/AccountDetail.razor.cs

@@ -1,3 +1,4 @@
+using Duempelkas.App.Services;
 using Duempelkas.App.Services.Models;
 using Microsoft.AspNetCore.Components;
 
@@ -10,6 +11,10 @@ public partial class AccountDetail
     [Parameter]
     public int AccountId { get; set; }
 
+    [SupplyParameterFromQuery(Name = "jahr")]
+    public int? QueryYear { get; set; }
+    private int? previousQueryYear;
+
     #endregion
 
     #region Fields
@@ -53,6 +58,8 @@ public partial class AccountDetail
 
     protected override async Task OnParametersSetAsync()
     {
+        if (QueryYear.HasValue && QueryYear != previousQueryYear) selectedYear = QueryYear;
+        previousQueryYear = QueryYear;
         await LoadAll();
     }
 
@@ -115,6 +122,12 @@ public partial class AccountDetail
         await LoadAll();
         lastSaved = saved;
         savedOutsideYear = selectedYear.HasValue && selectedYear.Value != saved.Date.Year ? saved.Date.Year : null;
+        var nav = Navigation;
+        var period = Period;
+        var accountId = AccountId;
+        Toasts.Show($"{saved.Kind} über {FormatAmount(saved.Amount)} {(saved.Edited ? "aktualisiert" : "gespeichert")}.", ToastKind.Success,
+            actionLabel: savedOutsideYear.HasValue ? $"Buchung im Jahr {saved.Date.Year} anzeigen" : null,
+            action: savedOutsideYear.HasValue ? () => { period.Year = saved.Date.Year; nav.NavigateTo($"/accounts/{accountId}?jahr={saved.Date.Year}"); return Task.CompletedTask; } : null);
         showAddEntry = false;
         showAddTransfer = false;
         editingEntry = null;
@@ -187,6 +200,7 @@ public partial class AccountDetail
     private async Task HandleExport()
     {
         if (fileBusy) return;
+        var busyToast = Toasts.Show("Dateiaktion läuft … Bitte warten.", persistent: true);
         fileBusy = true;
         fileResult = null;
         try
@@ -199,12 +213,13 @@ public partial class AccountDetail
 
         }
         catch (Exception ex) { fileResult = FileOperationResult.Error(ex); }
-        finally { fileBusy = false; }
+        finally { fileBusy = false; Toasts.Dismiss(busyToast); }
     }
 
     private async Task HandleOpenSavedPdf()
     {
         if (fileBusy) return;
+        var busyToast = Toasts.Show("Dateiaktion läuft … Bitte warten.", persistent: true);
         fileBusy = true;
         fileResult = null;
         try
@@ -218,7 +233,7 @@ public partial class AccountDetail
 
         }
         catch (Exception ex) { fileResult = FileOperationResult.Error(ex); }
-        finally { fileBusy = false; }
+        finally { fileBusy = false; Toasts.Dismiss(busyToast); }
     }
 
     private void CancelOpenSavedPdf()