Dispose mail webviews when closing the shell

Wino.Core.Domain/Enums/ThreeButtonDialogResult.cs

@@ -0,0 +1,8 @@
+namespace Wino.Core.Domain.Enums;
+
+public enum ThreeButtonDialogResult
+{
+    Primary,
+    Secondary,
+    Cancel
+}

Wino.Core.Domain/Interfaces/IMailDialogService.cs

@@ -19,6 +19,12 @@ public interface IMailDialogService : IDialogServiceBase
 {
     void ShowReadOnlyCalendarMessage();
     Task<bool> ShowHardDeleteConfirmationAsync();
+    Task<ThreeButtonDialogResult> ShowThreeButtonDialogAsync(string title,
+                                                             string description,
+                                                             string primaryButtonText,
+                                                             string secondaryButtonText,
+                                                             string cancelButtonText,
+                                                             WinoCustomMessageDialogIcon? icon = null);
     Task HandleSystemFolderConfigurationDialogAsync(Guid accountId, IFolderService folderService);
 
     // Custom dialogs

Wino.Core.Domain/Translations/en_US/resources.json

@@ -305,6 +305,8 @@
     "DialogMessage_DeleteRecurringSeriesTitle": "Delete Recurring Series",
     "DialogMessage_DiscardDraftConfirmationMessage": "This draft will be discarded. Do you want to continue?",
     "DialogMessage_DiscardDraftConfirmationTitle": "Discard Draft",
+    "DialogMessage_CloseDraftWindowConfirmationMessage": "A draft is still open. Save it before closing the window?",
+    "DialogMessage_CloseDraftWindowConfirmationTitle": "Close Window",
     "DialogMessage_EmptySubjectConfirmation": "Missing Subject",
     "DialogMessage_EmptySubjectConfirmationMessage": "Message has no subject. Do you want to continue?",
     "DialogMessage_EnableStartupLaunchDeniedMessage": "You can enable startup launch from Settings -> App Preferences.",