Removed the INC registrations for list view items.

Wino.Mail.ViewModels/Data/MailItemViewModel.cs

@@ -42,6 +42,15 @@ public partial class MailItemViewModel(MailCopy mailCopy) : ObservableRecipient,
     [NotifyPropertyChangedRecipients]
     public partial bool IsSelected { get; set; }
 
+    /// <summary>
+    /// Direct callback invoked when <see cref="IsSelected"/> changes.
+    /// Used by the ListViewItem container to update its IsCustomSelected DP
+    /// without subscribing to INotifyPropertyChanged (faster, AOT-safe).
+    /// </summary>
+    public Action<bool> OnSelectionChanged { get; set; }
+
+    partial void OnIsSelectedChanged(bool value) => OnSelectionChanged?.Invoke(value);
+
     /// <summary>
     /// Indicates if this mail item is currently being processed by a network operation.
     /// Used to show loading state in the UI.