feat(client): migrate MainLayout.razor to IAuthApiClient

- Replace IAuthService with IAuthApiClient for logout functionality
- Add @using JdeScoping.Core.ApiContracts
- LogoutAsync now calls AuthApi.LogoutAsync() and navigates to login
  regardless of API result

NEW/src/JdeScoping.Client/Layout/MainLayout.razor

@@ -1,5 +1,6 @@
 @inherits LayoutComponentBase
-@inject IAuthService AuthService
+@using JdeScoping.Core.ApiContracts
+@inject IAuthApiClient AuthApi
 @inject NavigationManager NavigationManager
 
 <RadzenLayout>
@@ -53,7 +54,8 @@
 @code {
     private async Task LogoutAsync()
     {
-        await AuthService.LogoutAsync();
+        // Call logout API - navigate to login regardless of result
+        await AuthApi.LogoutAsync();
         NavigationManager.NavigateTo("/login");
     }