I don't know some changes....

Wino.Mail/Dialogs/AccountPickerDialog.xaml.cs

@@ -1,32 +0,0 @@
-using System.Collections.Generic;
-using Wino.Core.Domain.Entities;
-
-#if NET8_0
-using Microsoft.UI.Xaml.Controls;
-#else
-using Windows.UI.Xaml.Controls;
-#endif
-
-namespace Wino.Dialogs
-{
-    public sealed partial class AccountPickerDialog : ContentDialog
-    {
-        public MailAccount PickedAccount { get; set; }
-
-        public List<MailAccount> AvailableAccounts { get; set; }
-
-        public AccountPickerDialog(List<MailAccount> availableAccounts)
-        {
-            AvailableAccounts = availableAccounts;
-
-            InitializeComponent();
-        }
-
-        private void AccountClicked(object sender, ItemClickEventArgs e)
-        {
-            PickedAccount = e.ClickedItem as MailAccount;
-
-            Hide();
-        }
-    }
-}