优化 K8s 页面布局与 local 模式部署收尾

P0-P1:
- Dockerfile.embed 启用 CGO 支持 SQLite+redka
- K8s scale>1 时警告 local 模式数据不共享

K8s UI:
- 移除侧边栏资源用量/容量分析及资源页横向 Tab 栏
- 修复事件路由(/workloads/events)与 Deployment 事件过滤
- 网络/配置/存储统一 YamlViewer 编辑，加大编辑弹窗

frontend/src/components/layout/Sidebar.tsx

@@ -98,9 +98,7 @@ const menuItems: MenuItem[] = [
         ],
       },
       { id: 'k8s-storage', name: '存储', icon: Database, path: '/workloads/pvcs', permission: 'k8s:workloads' },
-      { id: 'k8s-metrics', name: '资源用量', icon: Activity, path: '/workloads/metrics', permission: 'k8s:workloads' },
       { id: 'k8s-events', name: '事件', icon: Bell, path: '/workloads/events', permission: 'k8s:workloads' },
-      { id: 'k8s-capacity', name: '容量分析', icon: BarChart3, path: '/workloads/capacity', permission: 'k8s:workloads' },
       { id: 'k8s-topology', name: '架构拓扑', icon: Network, path: '/topology', permission: 'k8s:topology' },
     ],
   },