Fixed the issue with mail rendering page not getting disposed properly.

Wino.Mail.ViewModels/MailRenderingPageViewModel.cs

@@ -461,10 +461,10 @@ public partial class MailRenderingPageViewModel : MailBaseViewModel,
             // TODO: FromName and FromAddress is probably not correct here for mail lists.
             FromAddress = message.From.Mailboxes.FirstOrDefault()?.Address ?? Translator.UnknownAddress;
             FromName = message.From.Mailboxes.FirstOrDefault()?.Name ?? Translator.UnknownSender;
-            
+
             // Use the received date from MailCopy if available, otherwise fall back to the sent date from MIME message
             CreationDate = initializedMailItemViewModel?.MailCopy.CreationDate ?? message.Date.DateTime;
-            
+
             ContactPicture = initializedMailItemViewModel?.MailCopy.SenderContact?.Base64ContactPicture;
 
             // Automatically disable images for Junk folder to prevent pixel tracking.
@@ -535,7 +535,10 @@ public partial class MailRenderingPageViewModel : MailBaseViewModel,
     {
         base.OnNavigatedFrom(mode, parameters);
 
-        renderCancellationTokenSource.Cancel();
+        renderCancellationTokenSource?.Cancel();
+        renderCancellationTokenSource?.Dispose();
+        renderCancellationTokenSource = null;
+
         CurrentDownloadPercentage = 0d;
 
         initializedMailItemViewModel = null;
@@ -878,7 +881,7 @@ public partial class MailRenderingPageViewModel : MailBaseViewModel,
     protected override void RegisterRecipients()
     {
         base.RegisterRecipients();
-        
+
         Messenger.Register<NewMailItemRenderingRequestedEvent>(this);
         Messenger.Register<ThumbnailAdded>(this);
     }
@@ -886,7 +889,7 @@ public partial class MailRenderingPageViewModel : MailBaseViewModel,
     protected override void UnregisterRecipients()
     {
         base.UnregisterRecipients();
-        
+
         Messenger.Unregister<NewMailItemRenderingRequestedEvent>(this);
         Messenger.Unregister<ThumbnailAdded>(this);
     }

Wino.Mail.WinUI/Views/MailRenderingPage.xaml.cs

@@ -14,9 +14,9 @@ using Wino.Core.Domain;
 using Wino.Core.Domain.Enums;
 using Wino.Core.Domain.Interfaces;
 using Wino.Core.Domain.Models.Printing;
-using Wino.Mail.WinUI.Extensions;
 using Wino.Mail.ViewModels.Data;
 using Wino.Mail.WinUI;
+using Wino.Mail.WinUI.Extensions;
 using Wino.Messaging.Client.Mails;
 using Wino.Messaging.Client.Shell;
 using Wino.Views.Abstract;
@@ -149,6 +149,9 @@ public sealed partial class MailRenderingPage : MailRenderingPageAbstract,
         // Disposing the page.
         // Make sure the WebView2 is disposed properly.
 
+        ViewModel.SaveHTMLasPDFFunc = null;
+        ViewModel.DirectPrintFuncAsync = null;
+
         DisposeWebView2();
     }
 
@@ -325,7 +328,7 @@ public sealed partial class MailRenderingPage : MailRenderingPageAbstract,
     protected override void RegisterRecipients()
     {
         base.RegisterRecipients();
-        
+
         WeakReferenceMessenger.Default.Register<HtmlRenderingRequested>(this);
         WeakReferenceMessenger.Default.Register<CancelRenderingContentRequested>(this);
         WeakReferenceMessenger.Default.Register<ApplicationThemeChanged>(this);
@@ -334,7 +337,7 @@ public sealed partial class MailRenderingPage : MailRenderingPageAbstract,
     protected override void UnregisterRecipients()
     {
         base.UnregisterRecipients();
-        
+
         WeakReferenceMessenger.Default.Unregister<HtmlRenderingRequested>(this);
         WeakReferenceMessenger.Default.Unregister<CancelRenderingContentRequested>(this);
         WeakReferenceMessenger.Default.Unregister<ApplicationThemeChanged>(this);