fix(eiam): accept empty patch response

mjava/src/main/java/com/malk/service/eiam/impl/EiamClient_UserImpl.java

@@ -42,7 +42,8 @@ public class EiamClient_UserImpl implements EiamClient_User {
                 ? new HashMap<>() : new HashMap<>(bodyExt);
         String response = UtilHttp.doPatch(userUrl(instanceId, applicationId, userId),
                 headers(accessToken), null, body);
-        return parseResponse(response);
+        // prd PatchUser 成功时可能返回 204/空响应体，HTTP 层未抛异常即视为成功。
+        return parseActionResponse(response);
     }
 
     @Override

mjava/src/test/java/com/malk/service/eiam/impl/EiamClient_UserImplTest.java

@@ -2,7 +2,13 @@ package com.malk.service.eiam.impl;
 
 import com.malk.server.common.McException;
 import com.malk.server.eiam.EiamApiResponse;
+import com.malk.server.eiam.EiamConf;
+import com.sun.net.httpserver.HttpServer;
 import org.junit.Test;
+import org.springframework.test.util.ReflectionTestUtils;
+
+import java.net.InetSocketAddress;
+import java.util.Collections;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
@@ -47,4 +53,27 @@ public class EiamClient_UserImplTest {
 
         assertNull(response.getCode());
     }
+
+    @Test
+    public void patchUser_emptyResponse_returnsSuccessPayload() throws Exception {
+        HttpServer server = HttpServer.create(new InetSocketAddress(0), 0);
+        server.createContext("/v2/instance/application/users/user_test", exchange -> {
+            exchange.sendResponseHeaders(204, -1);
+            exchange.close();
+        });
+        server.start();
+        try {
+            EiamConf conf = new EiamConf();
+            conf.setBaseUrl("http://127.0.0.1:" + server.getAddress().getPort());
+            EiamClient_UserImpl client = new EiamClient_UserImpl();
+            ReflectionTestUtils.setField(client, "eiamConf", conf);
+
+            EiamApiResponse response = client.patchUser("token", "instance", "application",
+                    "user_test", Collections.singletonMap("username", "17612168216"));
+
+            assertNull(response.getCode());
+        } finally {
+            server.stop(0);
+        }
+    }
 }