Refactor dialog components to remove Cancel event from backdrop; enhance confirmation dialog for restore functionality

src/Duempelkas.App/Pages/Dashboard.razor

@@ -4,7 +4,6 @@
 @inject ISettingsService SettingsService
 @inject IPdfStatementService PdfStatementService
 @inject IFileSaveService FileSaveService
-@inject IJSRuntime JsRuntime
 @inject NavigationManager NavigationManager
 @using System.Globalization
 
@@ -97,10 +96,23 @@
                    OnCancel="CancelOpenSavedPdf" />
 }
 
+@if (showRestoreConfirm)
+{
+    <ConfirmDialog Title="Restore bestätigen"
+                   Message="Restore überschreibt die aktuelle Datenbank. Möchten Sie fortfahren?"
+                   ConfirmText="Ja, wiederherstellen"
+                   CancelText="Nein, abbrechen"
+                   ConfirmButtonClass="btn btn-warning"
+                   ConfirmIconClass="bi bi-arrow-counterclockwise"
+                   OnConfirm="HandleConfirmRestore"
+                   OnCancel="CancelRestoreConfirm" />
+}
+
 @code {
     private List<AccountSummaryDto>? accounts;
     private bool showAddAccount;
     private bool showEditClubName;
+    private bool showRestoreConfirm;
     private string clubName = string.Empty;
     private string? operationMessage;
     private string operationMessageClass = "alert-info";
@@ -147,13 +159,20 @@
         
     }
 
-    private async Task HandleRestoreAsync()
+    private Task HandleRestoreAsync()
     {
-        var confirmed = await JsRuntime.InvokeAsync<bool>("confirm",
-            "Restore überschreibt die aktuelle Datenbank. Möchten Sie fortfahren?");
+        showRestoreConfirm = true;
+        return Task.CompletedTask;
+    }
 
-        if (!confirmed) return;
+    private void CancelRestoreConfirm()
+    {
+        showRestoreConfirm = false;
+    }
 
+    private async Task HandleConfirmRestore()
+    {
+        showRestoreConfirm = false;
         var message = await BackupService.RestoreBackupAsync();
         var isSuccess = message.StartsWith("Wiederherstellung erfolgreich", StringComparison.OrdinalIgnoreCase);
 
@@ -164,7 +183,6 @@
         } else {
             SetOperationMessage(message, isSuccess);
         }
-
     }
 
     private async Task HandleDashboardExportAsync()