fix(i18n): 回退到稳定的 32% 覆盖率状态 (tsc + Vite 构建通过)

批量转换脚本引入的语法错误已回退，保留稳定的 i18n 转换:
- 翻译词典: 22 namespaces, 3600+ keys
- 已接入: 145+ 文件 (Dashboard/Login/K8s 主页面/Monitor/System/Deploy)
- 语言切换器在 Header 中可用 (🇨🇳/🇺🇸)
- tsc 零错误, Vite 构建成功

frontend/src/components/system/SystemManager.tsx

@@ -15,6 +15,7 @@ import { ResetPasswordDialog } from './ResetPasswordDialog';
 import { useLdapManagement } from './useLdapManagement';
 import { useAuditSettings } from './useAuditSettings';
 import type { UserFormData } from './UserFormDialog';
+import { useTranslation } from 'react-i18next';
 
 // 后端用户数据转换为前端兼容格式
 function mapUser( u: any) {
@@ -39,6 +40,7 @@ const emptyForm: UserFormData = {
 };
 
 export function SystemManager() {
+  const { t } = useTranslation();
   const confirm = useConfirm();
   const location = useLocation();
   // 侧边栏菜单路径映射到 Tab // Logan.Li
@@ -52,18 +54,18 @@ export function SystemManager() {
 
   const pageMeta: Record<string, { title: string; subtitle: string; icon: React.ReactNode }> = {
     users: {
-      title: '用户管理',
-      subtitle: '本地与 LDAP 用户账号、状态与角色分配',
+      title: t('system.users'),
+      subtitle: t('system.localUserDesc'),
       icon: <Users className="h-5 w-5" />,
     },
     roles: {
-      title: '角色权限',
-      subtitle: '角色绑定权限码，同时约束前端菜单与后端 API',
+      title: t('system.roles'),
+      subtitle: t('system.roleBindingHint'),
       icon: <Shield className="h-5 w-5" />,
     },
     settings: {
-      title: '系统设置',
-      subtitle: '通用与审计、安全策略、LDAP 目录服务',
+      title: t('system.settings'),
+      subtitle: t('system.generalSubtitle'),
       icon: <Settings className="h-5 w-5" />,
     },
   };
@@ -128,12 +130,12 @@ export function SystemManager() {
     return status === 'active' ? (
       <Badge variant="outline" className="border-[var(--dg-green)]/30 text-[var(--dg-green)] bg-[var(--dg-green)]/10">
         <CheckCircle className="h-3 w-3 mr-1" />
-        正常
+        {t('common.normal')}
       </Badge>
     ) : (
       <Badge variant="outline" className="border-[var(--dg-text-muted)]/30 text-[var(--dg-text-muted)] bg-[var(--dg-text-muted)]/10">
         <XCircle className="h-3 w-3 mr-1" />
-        禁用
+        {t('system.userInactive')}
       </Badge>
     );
   };
@@ -187,24 +189,24 @@ export function SystemManager() {
   };
 
   const handleDelete = async ( user: any) => {
-    const ok = await confirm({ title: '删除用户', description: `确认删除用户「${user.nickname || user.username}」吗？`, confirmText: '删除', variant: 'destructive' });
+    const ok = await confirm({ title: t('system.deleteUser'), description: `确认删除用户「${user.nickname || user.username}」吗？`, confirmText: t('common.delete'), variant: 'destructive' });
     if (!ok) return;
     try {
       await userApi.deleteUser(user.id);
       setSelectedUserIds((prev) => prev.filter((id) => id !== user.id));
       await loadUsers();
-      toast.success('用户已删除');
+      toast.success(t('system.userDeleted'));
     } catch (error: unknown) {
-      toast.error(error instanceof Error ? error.message : '删除失败');
+      toast.error(error instanceof Error ? error.message : t('common.deleteFailed'));
     }
   };
 
   const handleBatchDelete = async () => {
     if (selectedUserIds.length === 0) return;
     const ok = await confirm({
-      title: '批量删除用户',
+      title: t('system.batchDeleteUsers'),
       description: `确定删除选中的 ${selectedUserIds.length} 个用户吗？此操作不可恢复。`,
-      confirmText: '批量删除',
+      confirmText: t('system.terminalBatchDelete'),
       variant: 'destructive',
     });
     if (!ok) return;
@@ -214,7 +216,7 @@ export function SystemManager() {
       setSelectedUserIds([]);
       await loadUsers();
     } catch (error: unknown) {
-      toast.error(error instanceof Error ? error.message : '批量删除失败');
+      toast.error(error instanceof Error ? error.message : t('cloud.batchDeleteFailed'));
     }
   };
 
@@ -262,7 +264,7 @@ export function SystemManager() {
       setImportResult(res);
       await loadUsers();
     } catch (error) {
-      setImportResult({ code: 500, message: error?.message || '导入失败' });
+      setImportResult({ code: 500, message: error?.message || t('system.importFailed') });
     } finally {
       ldap.setImporting(false);
     }