Main app aot compatibility.

Wino.Mail.WinUI/Services/DialogService.cs

@@ -149,7 +149,7 @@ public class DialogService : DialogServiceBase, IMailDialogService
         return accountPicker.PickedAccount;
     }
 
-    public async Task<AccountSignature> ShowSignatureEditorDialog(AccountSignature signatureModel = null)
+    public async Task<AccountSignature> ShowSignatureEditorDialog(AccountSignature? signatureModel = null)
     {
         SignatureEditorDialog signatureEditorDialog;
         if (signatureModel != null)
@@ -169,7 +169,7 @@ public class DialogService : DialogServiceBase, IMailDialogService
 
         var result = await HandleDialogPresentationAsync(signatureEditorDialog);
 
-        return result == ContentDialogResult.Primary ? signatureEditorDialog.Result : null;
+        return result == ContentDialogResult.Primary ? signatureEditorDialog.Result : null!;
     }
 
     public async Task ShowMessageSourceDialogAsync(string messageSource)

Wino.Mail.WinUI/Services/NavigationService.cs

@@ -74,7 +74,7 @@ public class NavigationService : NavigationServiceBase, INavigationService
     }
 
     public bool Navigate(WinoPage page,
-                         object parameter = null,
+                         object? parameter = null,
                          NavigationReferenceFrame frame = NavigationReferenceFrame.ShellFrame,
                          NavigationTransitionType transition = NavigationTransitionType.None)
     {

Wino.Mail.WinUI/Services/ProviderService.cs

@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.Linq;
 using Wino.Core.Domain.Enums;
 using Wino.Core.Domain.Interfaces;
@@ -15,7 +16,7 @@ public class ProviderService : IProviderService
     {
         var details = GetAvailableProviders();
 
-        return details.FirstOrDefault(a => a.Type == type);
+        return details.FirstOrDefault(a => a.Type == type) ?? throw new InvalidOperationException($"Provider detail not found for type: {type}");
     }
 
     public List<IProviderDetail> GetAvailableProviders()