feat: 新增产线看板功能并优化多端系统体验

1. 新增SSE看板广播机制，业务操作后主动推送刷新事件
2. 新增产线工序横道图与工位状态展示面板
3. 移除dashboard无用的three.js依赖
4. 重构WMS客户端布局与WMS前端资源哈希
5. 新增工位终端时钟图标与大屏自适应布局
6. 新增系统截图脚本与说明书生成工具
7. 修复多处代码细节与空值处理逻辑

bj_power_wms_client/frontend/src/layouts/MainLayout.vue

@@ -4,7 +4,7 @@ import { useRoute, useRouter } from 'vue-router'
 import { ElMessage } from 'element-plus'
 import {
   HomeFilled, Download, Upload, Search, CircleCheck, List,
-  Box, Tickets, Monitor, EditPen, Fold, Expand, Location, Goods, Key, Operation, Van
+  Box, Tickets, Monitor, EditPen, Fold, Expand, Location, Goods, Key, Operation, Van, Clock
 } from '@element-plus/icons-vue'
 import { getUser, getToken, logout, setSession } from '../utils/auth'
 import request from '../utils/request'