Base64 subscription fetcher works, some ui changes

WinWARP.Ui/Services/DialogService.cs

@@ -14,14 +14,10 @@ using WinWARP.Ui.Views.Dialogs;
 
 namespace WinWARP.Ui.Services;
 
-public class DialogService : IDialogService
+public class DialogService(XamlRootTracker tracker, ILocalizationService localizationService) : IDialogService
 {
-    private readonly XamlRootTracker _tracker;
-
-    public DialogService(XamlRootTracker tracker)
-    {
-        _tracker = tracker;
-    }
+    private readonly XamlRootTracker _tracker = tracker;
+    private readonly ILocalizationService _localizationService = localizationService;
 
     public async Task<(CommonDialogResult Result, string Title, string URL, int UpdateInterval)> ShowAddSubscriptionAsync()
     {
@@ -44,4 +40,17 @@ public class DialogService : IDialogService
 
         return (mappedResult, dialog.ViewModel.CustomName, dialog.ViewModel.SubscriptionLink, dialog.ViewModel.UpdateInterval);
     }
+
+    public async Task ShowErrorAsync(string message)
+    {
+        var dialog = new ContentDialog
+        {
+            Title = _localizationService.GetString("ErrorDialog.Title"),
+            Content = message,
+            CloseButtonText = _localizationService.GetString("ErrorDialog.CloseButtonText"),
+            XamlRoot = _tracker.XamlRoot,
+            Style = Application.Current.Resources["DefaultContentDialogStyle"] as Style
+        };
+        await dialog.ShowAsync();
+    }
 }