feat(i18n): 安全批量转换 135 文件 — 覆盖率 34%→62%

使用 i18n.t() 全局方式（避免 hook 定位问题）:
- 288 目标文件中 135 个成功转换
- 2228 处中文替换为 i18n.t() 调用
- 1006 个新翻译 key 添加到 zh-CN.json + en-US.json
- 词典总量: 3554 keys (22 namespaces)
- tsc 零错误 + Vite 构建成功
- 6 个含代码示例/数据字符串的文件安全回退

frontend/src/components/kubernetes/ClusterOverviewPage.tsx

@@ -25,6 +25,7 @@ import { PageShell } from '@/components/layout/PageShell';
 import { ContentPanel } from '@/components/layout/ContentPanel';
 import { StatStrip } from '@/components/ui/stat-strip';
 import type { JsonData } from '@/types/common';
+import i18n from '@/i18n';
 
 const NAMESPACE_ICON: Record<string, React.ComponentType<Record<string, unknown>>> = {
   'kube-system': Server,
@@ -53,7 +54,7 @@ export default function ClusterOverviewPage() {
       const current = list.find((c: JsonData) => (c.code || String(c.id)) === clusterCode);
       setClusterInfo(current || null);
       if (!current && list.length > 0 && clusterCode) {
-        toast({ title: '集群未找到', description: `找不到集群 ${clusterCode}`, variant: 'destructive' });
+        toast({ title: i18n.t('kubernetes.clusteroverview.s9ff765c1'), description: `找不到集群 ${clusterCode}`, variant: 'destructive' });
       }
     } catch { setClusters([]); }
   }, [clusterCode]);
@@ -83,15 +84,15 @@ export default function ClusterOverviewPage() {
   return (
     <PageShell
       variant="default"
-      title={clusterCode || '集群概览'}
-      subtitle={clusterInfo?.version ? `集群概览 · Kubernetes ${clusterInfo.version}` : '集群概览'}
+      title={clusterCode || i18n.t('kubernetes.clusteroverview.s066c0aa3')}
+      subtitle={clusterInfo?.version ? `集群概览 · Kubernetes ${clusterInfo.version}` : i18n.t('kubernetes.clusteroverview.s066c0aa3')}
       icon={<Server className="h-5 w-5" />}
       metrics={!loading ? (
         <StatStrip
           items={[
-            { label: '节点', value: nodes.length, color: 'blue' },
-            { label: '命名空间', value: namespaces.length, color: 'green' },
-            { label: '版本', value: clusterInfo?.version || '-', color: 'muted' },
+            { label: i18n.t('kubernetes.node.title'), value: nodes.length, color: 'blue' },
+            { label: i18n.t('kubernetes.namespace.title'), value: namespaces.length, color: 'green' },
+            { label: i18n.t('agent.agentVersion'), value: clusterInfo?.version || '-', color: 'muted' },
           ]}
         />
       ) : undefined}
@@ -111,21 +112,21 @@ export default function ClusterOverviewPage() {
             <Table>
               <TableHeader>
                 <TableRow className="border-[var(--dg-border)] hover:bg-transparent">
-                  <TableHead className="text-[var(--dg-text-secondary)]">名称</TableHead>
-                  <TableHead className="text-[var(--dg-text-secondary)]">角色</TableHead>
-                  <TableHead className="text-[var(--dg-text-secondary)]">状态</TableHead>
+                  <TableHead className="text-[var(--dg-text-secondary)]"> {i18n.t('kubernetes.secret.secretName')} </TableHead>
+                  <TableHead className="text-[var(--dg-text-secondary)]"> {i18n.t('system.userRole')} </TableHead>
+                  <TableHead className="text-[var(--dg-text-secondary)]"> {i18n.t('system.terminalStatus')} </TableHead>
                   <TableHead className="text-[var(--dg-text-secondary)]">IP</TableHead>
                   <TableHead className="text-[var(--dg-text-secondary)]">OS</TableHead>
                   <TableHead className="text-[var(--dg-text-secondary)]">Kubelet</TableHead>
                   <TableHead className="text-[var(--dg-text-secondary)]">CPU</TableHead>
-                  <TableHead className="text-[var(--dg-text-secondary)]">内存</TableHead>
+                  <TableHead className="text-[var(--dg-text-secondary)]"> {i18n.t('kubernetes.pod.memory')} </TableHead>
                 </TableRow>
               </TableHeader>
               <TableBody>
                 {loading ? (
-                  <TableRow><TableCell colSpan={8} className="text-center text-[var(--dg-text-muted)] py-12"><Loader2 className="h-5 w-5 animate-spin mx-auto mb-2" />加载中...</TableCell></TableRow>
+                  <TableRow><TableCell colSpan={8} className="text-center text-[var(--dg-text-muted)] py-12"><Loader2 className="h-5 w-5 animate-spin mx-auto mb-2" /> {i18n.t('monitor.logPanel.logResults.loading')} </TableCell></TableRow>
                 ) : nodes.length === 0 ? (
-                  <TableRow><TableCell colSpan={8} className="text-center text-[var(--dg-text-muted)] py-12"><Cpu className="h-8 w-8 mx-auto mb-2 opacity-50" />暂无节点</TableCell></TableRow>
+                  <TableRow><TableCell colSpan={8} className="text-center text-[var(--dg-text-muted)] py-12"><Cpu className="h-8 w-8 mx-auto mb-2 opacity-50" /> {i18n.t('kubernetes.topology.noNodes')} </TableCell></TableRow>
                 ) : (
                   nodes.map((n: JsonData) => {
                     const cpuCores = n.cpu || 0;