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/ui/data-table.tsx

@@ -412,7 +412,7 @@ export function DataTable<T = Record<string, unknown>>(
             )}
             {selectable && (selectedIds?.length ?? 0) > 0 && (
               <Badge variant="secondary" className="bg-[var(--dg-bg-active)] text-[var(--dg-text-secondary)] border-[var(--dg-border)]">
-                已选 {selectedIds!.length} 项
+                {t("ui.datatable.s1a2b3c4d", { count: selectedIds!.length })}
               </Badge>
             )}
           </div>
@@ -423,7 +423,7 @@ export function DataTable<T = Record<string, unknown>>(
                 <DropdownMenuTrigger asChild>
                   <Button variant="outline" size="sm" className="h-8 gap-1.5 border-[var(--dg-border)] text-[var(--dg-text-secondary)] hover:bg-[var(--dg-bg-hover)] hover:text-[var(--dg-text-primary)]">
                     <Eye className="h-3.5 w-3.5" />
-                    <span className="hidden sm:inline">列</span>
+                    <span className="hidden sm:inline">{t("ui.datatable.s2b3c4d5e")}</span>
                   </Button>
                 </DropdownMenuTrigger>
                 <DropdownMenuContent align="end" className="bg-[var(--dg-bg-secondary)] border-[var(--dg-border)]">
@@ -579,11 +579,11 @@ export function DataTable<T = Record<string, unknown>>(
         <div className="flex items-center justify-between gap-2 px-1 py-2 flex-wrap">
           <div className="flex items-center gap-3">
             <span className="text-sm text-[var(--dg-text-muted)]">
-              共 <span className="text-[var(--dg-text-secondary)] font-medium">{sortedData.length}</span> 条
+              {t("ui.datatable.s3c4d5e6f", { count: sortedData.length })}
             </span>
             {selectable && (selectedIds?.length ?? 0) > 0 && (
               <span className="text-sm text-[var(--dg-text-muted)]">
-                / 已选 <span className="dg-text-blue font-medium">{selectedIds!.length}</span>
+                / {t("ui.datatable.s4d5e6f7g", { count: selectedIds!.length })}
               </span>
             )}
             <div className="flex items-center gap-1.5">
@@ -645,7 +645,7 @@ export function DataTable<T = Record<string, unknown>>(
 
 function renderCellValue(v: unknown): React.ReactNode {
   if (v == null || v === '') return <span className="text-[var(--dg-text-muted)]">—</span>;
-  if (typeof v === 'boolean') return v ? '是' : '否';
+  if (typeof v === 'boolean') return v ? i18n.t('ui.datatable.s5e6f7g8h') : i18n.t('ui.datatable.s6f7g8h9i');
   if (typeof v === 'object') {
     const obj = v as Record<string, unknown>;
     const label = obj.label ?? obj.name ?? obj.value;