设备监控-回写

src/device_bus/tree/DeviceTreeModel.h

@@ -31,6 +31,19 @@ public:
     QVector<DeviceTreeNode>& nodesMutable() { return m_nodes; }
 
     const DeviceTreeNode* findById(const QString& id) const;
+    int findIndexById(const QString& id) const;
+    int findIndexByStableKey(const QString& stableKey) const;
+
+    // Monitor/register path: upsert or mark online/offline
+    QString upsertNodeByStableKey(const QString& stableKey,
+                                  const QString& preferredId,
+                                  const QString& type,
+                                  const QString& endpoint,
+                                  const QString& name,
+                                  const QJsonObject& extraParams,
+                                  bool online,
+                                  const QString& lastSeenTs);
+    bool markOfflineByStableKey(const QString& stableKey, const QString& lastSeenTs);
 
     // 序列化为 daemon_config.json 所需格式
     QJsonArray toDeviceTreeJson() const;