feat: 完善企业场景多线路由与执行稳定性

补齐平台模板与场景 DSL、预算控制、执行看板和企业场景脚本，增强 Windows 启动/迁移与前端代理和聊天会话记忆，修复执行创建阶段 500 与异步链路排障体验。

Made-with: Cursor

frontend/src/components/MainLayout.vue

@@ -19,6 +19,10 @@
           :ellipsis="false"
           @select="handleMenuSelect"
         >
+          <el-menu-item index="console" @click="router.push('/console')">
+            <el-icon><Grid /></el-icon>
+            <span>主控台</span>
+          </el-menu-item>
           <el-menu-item index="workflows">
             <el-icon><Document /></el-icon>
             <span>工作流管理</span>
@@ -76,7 +80,7 @@
 import { computed } from 'vue'
 import { useRouter, useRoute } from 'vue-router'
 import { useUserStore } from '@/stores/user'
-import { Document, User, List, Connection, Setting, Star, Lock, Monitor, Bell } from '@element-plus/icons-vue'
+import { Document, User, List, Connection, Setting, Star, Lock, Monitor, Bell, Grid } from '@element-plus/icons-vue'
 
 const router = useRouter()
 const route = useRoute()
@@ -84,6 +88,8 @@ const userStore = useUserStore()
 
 // 当前激活的菜单
 const activeMenu = computed(() => {
+  if (route.path === '/console') return 'console'
+  if (route.path === '/execution-board') return 'console'
   if (route.path === '/' || route.path === '/workflow' || route.path.startsWith('/workflow/')) return 'workflows'
   if (route.path === '/agents' || route.path.startsWith('/agents/')) return 'agents'
   if (route.path === '/executions' || route.path.startsWith('/executions/')) return 'executions'
@@ -99,7 +105,9 @@ const activeMenu = computed(() => {
 
 // 菜单选择
 const handleMenuSelect = (key: string) => {
-  if (key === 'workflows') {
+  if (key === 'console') {
+    router.push('/console')
+  } else if (key === 'workflows') {
     router.push('/')
   } else if (key === 'agents') {
     router.push('/agents')