feat(emergency): 推送消息增加封面图字段messageImageUrl，去掉businessId

health-emergency/health-emergency-api/src/main/java/com/renkang/emergency/bean/response/SendIm.java

@@ -24,4 +24,8 @@ public class SendIm {
      * 业务标识，用于区分不同业务来源（例："article"=宣教推送）
      */
     private String businessId;
+    /**
+     * 消息图片URL（封面图全路径）
+     */
+    private String messageImageUrl;
 }

health-emergency/health-emergency-biz/src/main/java/com/renkang/emergency/service/impl/FirstAidPushServiceImpl.java

@@ -145,7 +145,7 @@ public class FirstAidPushServiceImpl implements IFirstAidPushService {
             sendIm.setType(1);
             sendIm.setTitle(resource.getTitle());
             sendIm.setContent(StrUtil.isNotBlank(resource.getSummary()) ? resource.getSummary() : resource.getTitle());
-            sendIm.setBusinessId("article");
+            sendIm.setMessageImageUrl(resource.getCoverImage());
 
             ImGroupMsgTextReqDO im = new ImGroupMsgTextReqDO();
             im.setGroupId(order.getSessionId());