fix(console): 上传代理适配服务发现模式

feign.external.url 置空切服务发现后，AliYunRestController 直接 @Value 读该
属性拼上传 URL，得到相对地址导致 RestTemplate 报 URI is not absolute，
Yumi 后台上传文件失败。

改为与 feign client 一致的双模式：属性非空用固定地址，为空时通过
LoadBalancerClient 从 Nacos 选取 rc-service-external 实例拼绝对地址。
全仓库审计确认这是唯一一处绕过 @FeignClient 直读 feign.*.url 的代码。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

rc-service/rc-service-console/console-adapter/src/main/java/com/red/circle/console/adapter/app/party3rd/AliYunRestController.java

@@ -1,13 +1,17 @@
 package com.red.circle.console.adapter.app.party3rd;//package com.sugartime.app.server.api.app.external;
 
+import com.red.circle.common.business.core.constant.ServiceNameConstant;
 import com.red.circle.external.inner.endpoint.oss.OssServiceClient;
 import com.red.circle.framework.core.asserts.ResponseAssert;
+import com.red.circle.tool.core.text.StringUtils;
 import java.io.InputStream;
 import java.util.Map;
 import java.util.Objects;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
+import org.springframework.cloud.client.ServiceInstance;
+import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
 import org.springframework.core.io.InputStreamResource;
 import org.springframework.http.HttpEntity;
 import org.springframework.http.HttpHeaders;
@@ -26,16 +30,32 @@ import org.springframework.web.multipart.MultipartFile;
 /**
  * 阿里云服务.
  */
-@Slf4j
-@RequiredArgsConstructor
-@RestController
-@RequestMapping(value = "/ali-yun", produces = MediaType.APPLICATION_JSON_VALUE)
+@Slf4j
+@RequiredArgsConstructor
+@RestController
+@RequestMapping(value = "/ali-yun", produces = MediaType.APPLICATION_JSON_VALUE)
 public class AliYunRestController {
 
   private final OssServiceClient ossServiceClient;
-  @Value("${feign.external.url}")
+  private final LoadBalancerClient loadBalancerClient;
+
+  @Value("${feign.external.url:}")
   private String externalBaseUrl;
 
+  /**
+   * external 服务基地址：feign.external.url 非空时用固定地址，否则走 Nacos 服务发现选一个实例.
+   */
+  private String resolveExternalBaseUrl() {
+    if (StringUtils.isNotBlank(externalBaseUrl)) {
+      return externalBaseUrl.replaceAll("/+$", "");
+    }
+    ServiceInstance instance = loadBalancerClient.choose(ServiceNameConstant.SERVICE_EXTERNAL);
+    if (instance == null) {
+      throw new IllegalStateException("no available " + ServiceNameConstant.SERVICE_EXTERNAL + " instance");
+    }
+    return instance.getUri().toString().replaceAll("/+$", "");
+  }
+
   /**
    * 阿里云sts.
    */
@@ -58,7 +78,7 @@ public class AliYunRestController {
         fileHeaders.setContentType(MediaType.parseMediaType(file.getContentType()));
       }
 
-      String uploadUrl = externalBaseUrl.replaceAll("/+$", "")
+      String uploadUrl = resolveExternalBaseUrl()
           + "/oss/upload/general?dir=" + encode(dir)
           + "&filename=" + encode(filename);
       ResponseEntity<Map> response;