feat(k8s): M10 Node 详情页 — PID/容器运行时/分配率

- 后端: GetNodeDetail handler — 获取单个节点完整信息
  * 系统信息: container_runtime/architecture/kubelet/os/kernel
  * 资源分配率: 遍历 Pod 计算 CPU/Memory/Pods requested vs allocatable
  * metrics-server 数据注入 (cpu_usage_m/mem_usage_mi)
  * 全量 conditions/taints/labels + 节点上的 Pod 列表
- 后端: K8s 客户端扩展
  * NodeTaint/NodeCondition 扩展字段 (reason/message)
  * NodeInfo 增加 architecture/operatingSystem
  * GetNode(name) 单节点查询方法
  * parseCpuToMilli()/parseMemToMi() 资源解析辅助函数
- 后端: 注册路由
  * GET /kubernetes/:clusterCode/nodes/:name (Kuboard code)
  * GET /kubernetes-clusters/:id/nodes/:name (ID)
- 前端: NodeDetailPage.tsx (~330行)
  * 系统信息卡片 + 资源分配率卡片(进度条)
  * 条件卡片 + 污点卡片 + 标签卡片 + Pod 列表
- 前端: 节点名称可点击跳转 (ClusterOverviewPage)
- 验证: API/SPA/TS/Vite 全部通过

backend/internal/api/routes/routes.go

@@ -284,6 +284,7 @@ func Register(r *gin.Engine, db *gorm.DB, log *zap.Logger, cfg *config.Config, c
 		clusters.DELETE("/:id", k8sHandler.DeleteCluster)
 		clusters.POST("/:id/sync", k8sHandler.SyncCluster) // 同步集群资源 // Logan.Li
 		clusters.GET("/:id/nodes", k8sHandler.ListNodes)
+		clusters.GET("/:id/nodes/:name", k8sHandler.GetNodeDetail) // M10 节点详情 // Logan.Li
 		clusters.GET("/:id/pods", k8sHandler.ListPods)
 		clusters.GET("/:id/deployments", k8sHandler.ListDeployments)
 		clusters.GET("/:id/services", k8sHandler.ListServices)
@@ -336,6 +337,9 @@ func Register(r *gin.Engine, db *gorm.DB, log *zap.Logger, cfg *config.Config, c
 			k8sHandler.ListDeploymentsNS(c)
 		})
 
+		// Node detail (cluster-scoped, not namespace-scoped) // M10
+		kubernetesRouter.GET("/:clusterCode/nodes/:name", k8sHandler.GetNodeDetail)
+
 		// Deployments
 		kubernetesRouter.GET("/:clusterCode/namespace/:namespace/deployments", k8sHandler.ListDeploymentsNS)
 		kubernetesRouter.POST("/:clusterCode/namespace/:namespace/deployments/:name/scale", k8sHandler.ScaleDeploymentNS)