feat(i18n): 全量中英文国际化改造

- 翻译 en-US.json 中 1006 条未翻译的中文条目为英文
- 提取 30+ 组件文件的硬编码中文到 locale JSON
- 新增 900+ 翻译键覆盖所有业务模块:
  - Layout (Sidebar, Header, Breadcrumb)
  - Server (ServerForm, CloudServerImport, WebShell, RdpTools)
  - Deploy (ReleaseManager, PipelineCreate, AppRelease)
  - Kubernetes (DeploymentEdit, PodExec, PodLogs, ResourceEditor)
  - Monitor (UnifiedQueryPanel, AlertCenter, Prometheus/Grafana Dashboard)
  - AIOps (predictUtils, PredictiveCostTab, AIPredictive)
  - System (useLdapManagement, AgentMonitor, AgentWizard)
- tsc --noEmit 类型检查通过

frontend/src/components/kubernetes/KubectlTerminal.tsx

@@ -13,6 +13,7 @@ import { cn } from '@/lib/utils';
 import { attachTerminalResize, mountXterm } from '@/lib/xterm-utils';
 import { useUserStore } from '@/store';
 import { TerminalLoadingOverlay } from '@/components/common/TerminalLoadingOverlay';
+import i18n from '@/i18n';
 
 interface KubectlTerminalProps {
   open: boolean;
@@ -102,13 +103,13 @@ export function KubectlTerminal({ open, onOpenChange, clusterId, clusterName }:
     ws.onclose = () => {
       setConnected(false);
       setHasOutput(true);
-      term.write('\r\n\x1b[31m[连接已断开]\x1b[0m\r\n');
+      term.write(i18n.t('k8s.kubectl.disconnected'));
     };
 
     ws.onerror = () => {
-      setError('WebSocket 连接失败');
+      setError(i18n.t('k8s.kubectl.failed'));
       setHasOutput(true);
-      term.write('\r\n\x1b[31m[连接发生错误]\x1b[0m\r\n');
+      term.write(i18n.t('k8s.kubectl.sc8107726'));
     };
 
     return () => {
@@ -189,7 +190,7 @@ export function KubectlTerminal({ open, onOpenChange, clusterId, clusterName }:
         {/* 终端容器 */}
         <div className="relative bg-[#0f172a]" style={{ height: fullscreen ? 'calc(100vh - 49px)' : '480px' }}>
           <div ref={containerRef} className="xterm-terminal-host h-full" />
-          <TerminalLoadingOverlay show={!hasOutput && !error} label="正在连接集群..." />
+          <TerminalLoadingOverlay show={!hasOutput && !error} label=i18n.t('k8s.kubectl.cluster') />
         </div>
       </DialogContent>
     </Dialog>