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/cloud/CloudBillingHelpers.tsx

@@ -1,14 +1,12 @@
 import { type ReactNode } from 'react';
 import { TrendingUp, TrendingDown } from 'lucide-react';
-import { useTranslation } from 'react-i18next';
-import i18n from '@/i18n';
 
 // 云厂商中文标签（主组件 + 弹窗共享） // Logan.Li
 export const providerLabels: Record<string, string> = {
-  aliyun: i18n.t('cloud.aliyun'),
-  tencent: i18n.t('cloud.tencent'),
+  aliyun: '阿里云',
+  tencent: '腾讯云',
   aws: 'AWS',
-  huawei: i18n.t('cloud.huawei'),
+  huawei: '华为云',
   azure: 'Azure',
 };
 
@@ -31,7 +29,6 @@ export const providerColors: Record<string, string> = {
 };
 
 export function ProviderDot({ provider, className = 'w-2 h-2' }: { provider: string; className?: string }) {
-  const { t } = useTranslation();
   return (
     <span
       className={`rounded-full shrink-0 ${className}`}
@@ -52,7 +49,6 @@ export function StatCard({ icon, label, value, trend, trendLabel, alert }: {
   trendLabel?: string;
   alert?: boolean;
 }) {
-  const { t } = useTranslation();
   return (
     <div className={alert ? 'dg-alert-banner' : 'rounded-lg border border-[var(--border-default)] bg-[var(--surface-raised)]/50 p-4'}>
       <div className="flex items-center justify-between mb-2">
@@ -72,9 +68,8 @@ export function StatCard({ icon, label, value, trend, trendLabel, alert }: {
 }
 
 export function TrendChart({ data }: { data: { date: string; cost: number }[] }) {
-  const { t } = useTranslation();
   if (data.length === 0) {
-    return <p className="text-sm dg-text-muted py-8 text-center">{t('common.noData')}</p>;
+    return <p className="text-sm dg-text-muted py-8 text-center">暂无数据</p>;
   }
   const max = Math.max(...data.map((d) => d.cost), 1);
   const recent = data.slice(-30);