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/server.js

@@ -64,6 +64,7 @@ const ticketFieldRoutes = require('./routes/ticketFields');
 const systemSettingsRoutes = require('./routes/systemSettings');
 const cableRoutes = require('./routes/cables');
 const devicePortRoutes = require('./routes/devicePorts');
+const networkCardRoutes = require('./routes/networkCards');
 
 // 使用路由
 app.use('/api/devices', deviceRoutes);
@@ -83,6 +84,7 @@ app.use('/api/ticket-fields', ticketFieldRoutes);
 app.use('/api/system-settings', systemSettingsRoutes);
 app.use('/api/cables', cableRoutes);
 app.use('/api/device-ports', devicePortRoutes);
+app.use('/api/network-cards', networkCardRoutes);
 
 // 静态文件服务
 app.use('/uploads', express.static('uploads'));