feat: 脚本/定时任务真实执行+输出捕获+执行历史 — 替换pending空壳为本地执行,采集stdout/stderr,更新统计;修复CronJobManager/Automation字段名不匹配(status→enabled,cron→cron_expr,command→content,language→type)

frontend/src/components/layout/Sidebar.tsx

@@ -61,6 +61,7 @@ const menuItems: MenuItem[] = [
       { id: 'regions', name: '区域管理', icon: MapPin, path: '/regions' },
       { id: 'platforms', name: '云平台', icon: CloudCog, path: '/platforms' },
       { id: 'cloud-billing', name: '云账单', icon: BarChart3, path: '/cloud-billing' },
+      { id: 'agent-monitor', name: 'Agent监控', icon: Activity, path: '/agent-monitor' },
     ],
   },
   {
@@ -93,6 +94,7 @@ const menuItems: MenuItem[] = [
       { id: 'logs-monitor', name: '日志能力', icon: FileCode, path: '/logs-monitor' },
       { id: 'trace', name: '链路追踪', icon: GitBranch, path: '/trace' },
       { id: 'grafana', name: '监控大屏', icon: Monitor, path: '/grafana' },
+      { id: 'agent-alerts', name: 'Agent告警', icon: AlertTriangle, path: '/agent-alerts' },
     ],
   },
   { id: 'approval', name: '审批流程', icon: CheckSquare, path: '/approval' },