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/UserFormDialog.tsx

@@ -19,6 +19,7 @@ import {
 import { User } from 'lucide-react';
 import { userApi } from '@/api';
 import type { JsonData } from '@/types/common';
+import { useTranslation } from 'react-i18next';
 
 export interface UserFormData {
   username: string;
@@ -49,6 +50,7 @@ export function UserFormDialog({
   saving,
   onSubmit,
 }: UserFormDialogProps) {
+  const { t } = useTranslation();
   const [roles, setRoles] = useState<{ id: string; name: string }[]>([]);
 
   // 对话框打开时拉取角色列表 // Logan.Li
@@ -81,36 +83,36 @@ export function UserFormDialog({
         <DialogHeader>
           <DialogTitle className="text-[var(--dg-text-primary)] flex items-center gap-2">
             <User className="h-5 w-5 dg-text-blue" />
-            {editingUser ? '编辑用户' : '新建用户'}
+            {editingUser ? t('system.editUser') : '新建用户'}
           </DialogTitle>
           <DialogDescription className="dg-text-muted">
-            {editingUser ? '修改用户信息' : '创建新的系统用户'}
+            {editingUser ? t('system.editUserDesc') : t('system.createUserDesc')}
           </DialogDescription>
         </DialogHeader>
 
         <div className="space-y-4">
           <div className="grid grid-cols-2 gap-4">
             <div className="space-y-2">
-              <label className="text-xs dg-text-muted">用户名</label>
+              <label className="text-xs dg-text-muted">{t('system.userName')}</label>
               <Input
                 value={form.username}
                 onChange={(e) => setForm({ ...form, username: e.target.value })}
                 disabled={!!editingUser}
                 className="dg-input"
-                placeholder="登录用户名"
+                placeholder={t('system.loginUsername')}
               />
             </div>
             <div className="space-y-2">
-              <label className="text-xs dg-text-muted">昵称</label>
+              <label className="text-xs dg-text-muted">{t('system.userNickname')}</label>
               <Input
                 value={form.nickname}
                 onChange={(e) => setForm({ ...form, nickname: e.target.value })}
                 className="dg-input"
-                placeholder="显示昵称"
+                placeholder={t('system.userShowNickname')}
               />
             </div>
             <div className="space-y-2">
-              <label className="text-xs dg-text-muted">邮箱</label>
+              <label className="text-xs dg-text-muted">{t('system.userEmail')}</label>
               <Input
                 value={form.email}
                 onChange={(e) => setForm({ ...form, email: e.target.value })}
@@ -119,19 +121,19 @@ export function UserFormDialog({
               />
             </div>
             <div className="space-y-2">
-              <label className="text-xs dg-text-muted">手机号</label>
+              <label className="text-xs dg-text-muted">{t('system.userPhone')}</label>
               <Input
                 value={form.phone}
                 onChange={(e) => setForm({ ...form, phone: e.target.value })}
                 className="dg-input"
-                placeholder="可选"
+                placeholder={t('common.optional')}
               />
             </div>
             <div className="space-y-2">
-              <label className="text-xs dg-text-muted">角色</label>
+              <label className="text-xs dg-text-muted">{t('system.userRole')}</label>
               <Select value={form.role} onValueChange={(v) => setForm({ ...form, role: v })}>
                 <SelectTrigger className="dg-input">
-                  <SelectValue placeholder="选择角色" />
+                  <SelectValue placeholder={t('deploy.rbac.selectRole')} />
                 </SelectTrigger>
                 <SelectContent className="dg-input">
                   {roles.map((role) => (
@@ -143,7 +145,7 @@ export function UserFormDialog({
               </Select>
             </div>
             <div className="space-y-2">
-              <label className="text-xs dg-text-muted">状态</label>
+              <label className="text-xs dg-text-muted">{t('system.userStatus')}</label>
               <Select
                 value={String(form.status)}
                 onValueChange={(v) => setForm({ ...form, status: Number(v) })}
@@ -152,32 +154,32 @@ export function UserFormDialog({
                   <SelectValue />
                 </SelectTrigger>
                 <SelectContent className="dg-input">
-                  <SelectItem value="1">正常</SelectItem>
-                  <SelectItem value="0">禁用</SelectItem>
+                  <SelectItem value="1">{t('common.normal')}</SelectItem>
+                  <SelectItem value="0">{t('system.userInactive')}</SelectItem>
                 </SelectContent>
               </Select>
             </div>
           </div>
           <div className="space-y-2">
             <label className="text-xs dg-text-muted">
-              密码{editingUser ? '（留空则不修改）' : ''}
+              密码{editingUser ? t('system.leaveBlankNoModify2') : ''}
             </label>
             <Input
               type="password"
               value={form.password}
               onChange={(e) => setForm({ ...form, password: e.target.value })}
               className="dg-input"
-              placeholder={editingUser ? '留空则不修改' : '设置初始密码'}
+              placeholder={editingUser ? t('system.passwordLeaveBlank') : t('system.setInitialPassword')}
             />
           </div>
         </div>
 
         <DialogFooter>
           <Button variant="outline" className="border-[var(--dg-border)] text-[var(--dg-text-secondary)]" onClick={() => onOpenChange(false)}>
-            取消
+            {t('common.cancel')}
           </Button>
           <Button className="bg-blue-600 hover:bg-blue-700 text-white" onClick={onSubmit} disabled={saving}>
-            {saving ? '保存中...' : '保存'}
+            {saving ? t('k8s.topology.saving') : t('common.save')}
           </Button>
         </DialogFooter>
       </DialogContent>