Switched from self created static constant json options to a source generator options

Moonlight.Frontend/UI/Admin/Views/Sys/Themes/Update.razor

@@ -6,6 +6,7 @@
 @using Moonlight.Frontend.Helpers
 @using Moonlight.Frontend.Mappers
 @using Moonlight.Frontend.Services
+@using Moonlight.Shared.Http
 @using Moonlight.Shared.Http.Requests.Admin.Themes
 @using Moonlight.Shared.Http.Responses.Admin.Themes
 @using ShadcnBlazor.Buttons
@@ -136,7 +137,7 @@
         var response = await HttpClient.PatchAsJsonAsync(
             $"/api/admin/themes/{Theme.Id}",
             Request,
-            Constants.SerializerOptions
+            SerializationContext.Default.Options
         );
         
         if (!response.IsSuccessStatusCode)