清理代码

Tiku.Application/QuestionBanks/QuestionBankQueryModels.cs

@@ -1,6 +1,6 @@
 using System.Text.Json;
-using Tiku.Domain.QuestionBanks;
 using Tiku.Domain.Content;
+using Tiku.Domain.QuestionBanks;
 
 namespace Tiku.Application.QuestionBanks;
 
@@ -78,4 +78,4 @@ public sealed record QuestionVersionCatalogItem(
     JsonElement SubQuestions,
     string? CodeLang,
     string? CodeTemplate,
-    DateTimeOffset CreatedAt);
+    DateTimeOffset CreatedAt);