refactor: 统一命名空间为Foxel.Api，移除不必要的using语句，优化代码结构

Api/Management/StorageManagementController.cs

@@ -1,9 +1,8 @@
-using Foxel.Controllers;
 using Foxel.Models;
 using Foxel.Models.Request.Storage;
 using Foxel.Models.Response.Storage;
-using Foxel.Services.Attributes;
 using Foxel.Services.Management;
+using Foxel.Services.Storage;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;