修改User模块，同步原始代码

Core/MAX.Framework/Conventions/DefaultHttpGetAttribute.cs

@@ -0,0 +1,28 @@
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc.ActionConstraints;
+using Microsoft.AspNetCore.Mvc.ApplicationModels;
+using Microsoft.AspNetCore.Routing;
+
+namespace MAX.Framework.Conventions;
+
+/// <summary>
+/// 控制器内未声明 HTTP 方法的操作默认只接受 GET，供各模块复用。
+/// 显式 HTTP 方法声明优先；同时补充路由约束和端点元数据，保证接口文档一致。
+/// </summary>
+[AttributeUsage(AttributeTargets.Class, Inherited = true)]
+public sealed class DefaultHttpGetAttribute : Attribute, IControllerModelConvention
+{
+    public void Apply(ControllerModel controller)
+    {
+        foreach (var action in controller.Actions)
+        foreach (var selector in action.Selectors)
+        {
+            if (selector.ActionConstraints.OfType<HttpMethodActionConstraint>().Any()
+                || selector.EndpointMetadata.OfType<IHttpMethodMetadata>().Any())
+                continue;
+
+            selector.ActionConstraints.Add(new HttpMethodActionConstraint([HttpMethods.Get]));
+            selector.EndpointMetadata.Add(new HttpMethodMetadata([HttpMethods.Get]));
+        }
+    }
+}