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/pages/monitor/site-monitor/SiteProtocolPieChart.tsx

@@ -6,7 +6,6 @@ import { Card, CardContent } from '@/components/ui/card';
 import { PieChart as PieChartIcon } from 'lucide-react';
 import { PROBE_TYPE_OPTIONS, normalizeProbeType } from './helpers';
 import type { SiteTask } from './helpers';
-import { useTranslation } from 'react-i18next';
 
 interface Props {
   tasks: SiteTask[];
@@ -21,7 +20,6 @@ const PROTOCOL_COLORS: Record<string, string> = {
 };
 
 export function SiteProtocolPieChart({ tasks }: Props) {
-  const { t } = useTranslation();
   const protocolData = useMemo(() => {
     const counts: Record<string, number> = {};
     for (const t of PROBE_TYPE_OPTIONS) counts[t] = 0;
@@ -37,7 +35,7 @@ export function SiteProtocolPieChart({ tasks }: Props) {
   if (tasks.length === 0) {
     return (
       <Card className="bg-[var(--dg-bg-secondary)] border-[var(--dg-border)]">
-        <CardContent className="p-6 text-center text-sm text-[var(--dg-text-muted)]">{t('monitor.siteprotocolpiechart.s0589e5')}</CardContent>
+        <CardContent className="p-6 text-center text-sm text-[var(--dg-text-muted)]">暂无任务</CardContent>
       </Card>
     );
   }
@@ -47,7 +45,7 @@ export function SiteProtocolPieChart({ tasks }: Props) {
       <CardContent className="p-4">
         <div className="flex items-center gap-2 mb-2">
           <PieChartIcon className="h-4 w-4 text-[var(--dg-text-muted)]" />
-          <h3 className="text-sm font-medium text-[var(--dg-text-primary)]">{t('monitor.siteprotocolpiechart.s20721c')}</h3>
+          <h3 className="text-sm font-medium text-[var(--dg-text-primary)]">协议数量分布</h3>
           <span className="text-[10px] text-[var(--dg-text-muted)]">共 {tasks.length} 个任务</span>
         </div>
         <ResponsiveContainer width="100%" height={200}>