feat(设备管理): 添加一键删除所有设备功能

- 前端添加删除所有设备按钮及确认对话框
- 后端实现删除所有设备及相关数据的接口
- 更新.gitignore忽略backend/temp目录

.gitignore

@@ -1,5 +1,6 @@
 # Dependencies
 node_modules/
+/backed/temp
 
 # Build outputs
 dist/

backend/routes/devices.js

@@ -1092,6 +1092,80 @@ router.delete('/batch-delete', validateBody(batchDeviceIdsSchema), async (req, r
   }
 });
 
+// 删除所有设备（一键清空）
+router.delete('/delete-all', async (req, res) => {
+  const t = await sequelize.transaction();
+  try {
+    // 获取所有设备
+    const allDevices = await Device.findAll({ transaction: t });
+    
+    if (allDevices.length === 0) {
+      await t.rollback();
+      return res.json({ message: '没有设备需要删除', deletedCount: 0 });
+    }
+    
+    const deviceIds = allDevices.map(d => d.deviceId);
+    
+    // 1. 删除相关接线
+    await Cable.destroy({
+      where: {
+        [Op.or]: [
+          { sourceDeviceId: { [Op.in]: deviceIds } },
+          { targetDeviceId: { [Op.in]: deviceIds } }
+        ]
+      },
+      transaction: t
+    });
+    
+    // 2. 删除相关网卡
+    await NetworkCard.destroy({
+      where: { deviceId: { [Op.in]: deviceIds } },
+      transaction: t
+    });
+    
+    // 3. 删除相关端口
+    await DevicePort.destroy({
+      where: { deviceId: { [Op.in]: deviceIds } },
+      transaction: t
+    });
+    
+    // 4. 解除工单关联
+    await Ticket.update(
+      { deviceId: null },
+      { where: { deviceId: { [Op.in]: deviceIds } }, transaction: t }
+    );
+    
+    // 5. 更新机柜功率
+    for (const device of allDevices) {
+      if (device.rackId) {
+        const rack = await Rack.findByPk(device.rackId, { transaction: t });
+        if (rack) {
+          await rack.update({
+            currentPower: Math.max(0, rack.currentPower - device.powerConsumption)
+          }, { transaction: t });
+        }
+      }
+    }
+    
+    // 6. 删除所有设备
+    const deletedCount = await Device.destroy({
+      where: {},
+      transaction: t
+    });
+    
+    await t.commit();
+    
+    res.json({
+      message: `成功删除所有设备，共删除 ${deletedCount} 个设备`,
+      deletedCount
+    });
+  } catch (error) {
+    await t.rollback();
+    console.error('删除所有设备错误:', error);
+    res.status(500).json({ error: error.message, stack: error.stack });
+  }
+});
+
 // 删除设备
 router.delete('/:deviceId', async (req, res) => {
   const t = await sequelize.transaction();

frontend/src/pages/DeviceManagement.jsx

@@ -599,6 +599,29 @@ function DeviceManagement() {
     });
   };
 
+  // 一键删除所有设备
+  const handleDeleteAll = async () => {
+    Modal.confirm({
+      title: '危险操作确认',
+      content: '确定要删除所有设备吗？此操作将清空所有设备数据，包括相关的接线、网卡、端口等信息，且不可恢复！',
+      okText: '确认删除所有',
+      okType: 'danger',
+      cancelText: '取消',
+      onOk: async () => {
+        try {
+          const response = await axios.delete('/api/devices/delete-all');
+          message.success(response.data.message || '成功删除所有设备');
+          setSelectedDevices([]);
+          setSelectAll(false);
+          fetchDevices(1, 10, true);
+        } catch (error) {
+          message.error('删除所有设备失败');
+          console.error('删除所有设备失败:', error);
+        }
+      }
+    });
+  };
+
   // 删除设备
   const handleDelete = async (deviceId) => {
     Modal.confirm({
@@ -1562,6 +1585,13 @@ function DeviceManagement() {
             >
               批量删除 ({selectedDevices.length})
             </Button>
+            <Button
+              style={dangerActionStyle}
+              icon={<DeleteOutlined />}
+              onClick={handleDeleteAll}
+            >
+              删除所有
+            </Button>
           </div>
         </div>
       </div>