feat: 优化3D可视化性能并更新文档

- 实现3D可视化性能优化（降低DPR、阴影贴图、简化光源）
- 实现LOD多级细节系统，根据相机距离自动切换
- 添加设备弹出动画开关，默认关闭
- 修复设备缩放时位置偏移问题
- 更新README添加项目截图占位符
- 精简DEPLOYMENT.md文档，添加Gitee仓库支持
- 更新CHANGELOG.md记录v1.1.0版本

backend/routes/devicePorts.js

@@ -78,7 +78,7 @@ router.get('/device/:deviceId', async (req, res) => {
 
 router.post('/', async (req, res) => {
   try {
-    const { portId, deviceId, portName, portType, portSpeed, status, vlanId, description } = req.body;
+    const { portId, deviceId, nicId, portName, portType, portSpeed, status, vlanId, description } = req.body;
     
     if (!deviceId || !portName) {
       return res.status(400).json({ error: '缺少必填字段' });
@@ -97,6 +97,7 @@ router.post('/', async (req, res) => {
     const port = await DevicePort.create({
       portId: autoPortId,
       deviceId,
+      nicId: nicId || null,
       portName,
       portType: portType || 'RJ45',
       portSpeed: portSpeed || '1G',
@@ -156,6 +157,7 @@ router.post('/batch', async (req, res) => {
         await DevicePort.create({
           portId: portData.portId,
           deviceId: portData.deviceId,
+          nicId: portData.nicId || null,
           portName: portData.portName,
           portType: portData.portType || 'RJ45',
           portSpeed: portData.portSpeed || '1G',