fix: 设备离线状态同步问题修复

- device_disconnected改为设置offline状态而非移除设备
- device_disconnected兼容字符串和对象两种数据格式
- 新增devices_list_refresh事件监听,每10秒全量同步设备列表
- 解决设备在线但Web端显示离线的根本问题

src/components/RemoteControlApp.tsx

@@ -290,6 +290,19 @@ const RemoteControlApp: React.FC = () => {
         }
       })
 
+      // 定期设备列表全量刷新(服务端每10秒推送)
+      socket.on('devices_list_refresh', (data) => {
+        if (!data?.devices || !Array.isArray(data.devices)) {
+          return
+        }
+        data.devices.forEach((device: any) => {
+          if (!device?.id) {
+            return
+          }
+          dispatch(addDevice(device))
+        })
+      })
+
       socket.on('device_connected', (device) => {
         console.log('设备已连接:', device)
         dispatch(addDevice(device))
@@ -306,9 +319,19 @@ const RemoteControlApp: React.FC = () => {
         }))
       })
 
-      socket.on('device_disconnected', (deviceId) => {
-        console.log('设备已断开:', deviceId)
-        dispatch(removeDevice(deviceId))
+      socket.on('device_disconnected', (data) => {
+        // 兼容两种格式: 字符串deviceId 或 对象{deviceId}
+        const deviceId = typeof data === 'string' ? data : data?.deviceId
+        if (!deviceId) {
+          console.error('[Device] device_disconnected: invalid data', data)
+          return
+        }
+        console.log('[Device] disconnected:', deviceId)
+        // 将设备状态设为offline而不是移除，避免设备重连时丢失
+        dispatch(updateDeviceConnectionStatus({
+          deviceId,
+          status: 'offline'
+        }))
         dispatch(addNotification({
           type: 'info',
           title: '设备已断开',