refactor: 全局重命名 k8s → kubernetes (前后端+路由+表名+文件)

后端:
  - pkg/k8sclient → pkg/kubernetesclient
  - models/k8s.go → models/kubernetes.go
  - handlers/k8s.go → handlers/kubernetes.go
  - K8sCluster/K8sNode/.. → KubernetesCluster/KubernetesNode/..
  - K8sHandler → KubernetesHandler
  - 路由: /k8s-clusters → /kubernetes-clusters
  - 路由: /k8s/:code/namespace/:ns/... → /kubernetes/:code/namespace/:ns/... (Kuboard风格)
  - 表前缀: container_k8s_ → container_kubernetes_

前端:
  - components/k8s/ → components/kubernetes/
  - K8sClusters → KubernetesClusters
  - K8sWorkloads → KubernetesWorkloads
  - K8sNodes → KubernetesNodes
  - k8sApi → kubernetesApi
  - 路由前缀: /k8s/ → /kubernetes/

测试验证:
✅ /kubernetes/k8s-cluster-liren/namespace/kube-system/deployments → 3 items
✅ /kubernetes/k8s-cluster-liren/namespace/kube-system/pods → 7 items
✅ /kubernetes/k8s-cluster-liren/namespace/kube-system/services → 4 items
✅ /kubernetes/k8s-cluster-liren/namespace/kube-system/configmaps → 6 items
✅ /kubernetes/k8s-cluster-liren/namespace/kube-system/secrets → 1 item
✅ /kubernetes/k8s-cluster-liren/namespaces → 4 items

frontend/src/components/monitor/dashboard/HostMonitorDashboard.tsx

@@ -1,5 +1,5 @@
 // 主机监控大屏 — Grafana 风格：统计卡片 + 资源条状图 + 可排序列表 // Logan.Li
-// 参照: Grafana node-dashboard.json (表格+时序) / k8s-dashboard.json (bargauge+阈值)
+// 参照: Grafana node-dashboard.json (表格+时序) / kubernetes-dashboard.json (bargauge+阈值)
 import { useState, useEffect, useCallback } from 'react';
 import { useNavigate } from 'react-router-dom';
 import {

frontend/src/components/monitor/dashboard/PrometheusDashboard.tsx

@@ -122,7 +122,7 @@ export const PrometheusDashboard: React.FC<Props> = ({ dsUrl }) => {
   const [loading, setLoading] = useState(false);
   const [targets, setTargets] = useState(0);
   const [error, setError] = useState('');
-  const [tab, setTab] = useState('k8s');
+  const [tab, setTab] = useState('kubernetes');
   const [k8sD, setK8sD] = useState<any>({});
   const [nodeD, setNodeD] = useState<any>({});
   const [podD, setPodD] = useState<any>({});
@@ -143,13 +143,13 @@ export const PrometheusDashboard: React.FC<Props> = ({ dsUrl }) => {
   };
 
   const loadAll = async (u: string) => {
-    for (const t of ['k8s','node','pod','jvm']) {
+    for (const t of ['kubernetes','node','pod','jvm']) {
       try {
         const data: any = await http.post('/prometheus/dashboard', { url: u, type: t });
         const items: any = {};
         for (const [k, v] of Object.entries(data||{}))
           items[k] = Array.isArray(v) ? v : ((v as any)?.data?.result ? parsePrune((v as any).data.result) : v);
-        if (t==='k8s') setK8sD(items); if (t==='node') setNodeD(items);
+        if (t==='kubernetes') setK8sD(items); if (t==='node') setNodeD(items);
         if (t==='pod') setPodD(items); if (t==='jvm') setJvmD(items);
       } catch {}
     }
@@ -175,12 +175,12 @@ export const PrometheusDashboard: React.FC<Props> = ({ dsUrl }) => {
         : (
           <Tabs value={tab} onValueChange={setTab}>
             <TabsList className="bg-[var(--dg-bg-tertiary)] mb-3">
-              <TabsTrigger value="k8s" className="text-xs"><Container className="w-3 h-3 mr-1" />K8s</TabsTrigger>
+              <TabsTrigger value="kubernetes" className="text-xs"><Container className="w-3 h-3 mr-1" />K8s</TabsTrigger>
               <TabsTrigger value="node" className="text-xs"><Server className="w-3 h-3 mr-1" />Node</TabsTrigger>
               <TabsTrigger value="pod" className="text-xs"><Box className="w-3 h-3 mr-1" />Pod</TabsTrigger>
               <TabsTrigger value="jvm" className="text-xs"><Zap className="w-3 h-3 mr-1" />JVM</TabsTrigger>
             </TabsList>
-            <TabsContent value="k8s"><K8sPanel d={k8sD} /></TabsContent>
+            <TabsContent value="kubernetes"><K8sPanel d={k8sD} /></TabsContent>
             <TabsContent value="node"><NodePanel d={nodeD} /></TabsContent>
             <TabsContent value="pod"><PodPanel d={podD} /></TabsContent>
             <TabsContent value="jvm"><JvmPanel d={jvmD} /></TabsContent>