fix(ops): strictly control heartbeat logic to prevent ghost online status

viewsh-module-ops/viewsh-module-environment-biz/src/main/java/com/viewsh/module/ops/environment/service/badge/BadgeDeviceStatusServiceImpl.java

@@ -272,9 +272,16 @@ public class BadgeDeviceStatusServiceImpl implements BadgeDeviceStatusService, I
             }
 
             // 如果之前是 OFFLINE，转为 IDLE
+            // 如果当前状态为空，初始化为 IDLE
             BadgeDeviceStatusEnum newStatus = currentStatus;
-            if (currentStatus == null || currentStatus == BadgeDeviceStatusEnum.OFFLINE) {
+            if (currentStatus == null) {
                 newStatus = BadgeDeviceStatusEnum.IDLE;
+            } else if (currentStatus == BadgeDeviceStatusEnum.OFFLINE) {
+                // 如果已标记为离线，心跳不再自动复活设备
+                // 必须依赖 IoT 上线事件或定时对账 Job 来恢复在线状态
+                // 这样做是为了防止因离线事件和心跳包乱序（幽灵心跳）导致的“假在线”问题
+                log.debug("设备处于离线状态但收到心跳，保持离线状态: deviceId={}", deviceId);
+                newStatus = BadgeDeviceStatusEnum.OFFLINE;
             }
 
             // 更新状态