chore: 优化代码注释

src/Api/TakeoutSaaS.UserApi/Controllers/HealthController.cs

@@ -1,3 +1,4 @@
+using System;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
@@ -20,9 +21,9 @@ public class HealthController : BaseApiController
     /// <returns>健康状态</returns>
     [HttpGet]
     [ProducesResponseType(typeof(ApiResponse<object>), StatusCodes.Status200OK)]
-    public IActionResult Get()
+    public ApiResponse<object> Get()
     {
         var payload = new { status = "OK", service = "UserApi", time = DateTime.UtcNow };
-        return Ok(ApiResponse<object>.Ok(payload));
+        return ApiResponse<object>.Ok(payload);
     }
 }