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/agent/HostDetailDialog.tsx

@@ -30,7 +30,6 @@ import {
   ResponsiveContainer,
 } from 'recharts';
 import type { JsonData } from '@/types/common';
-import { useTranslation } from 'react-i18next';
 
 export function HostDetailDialog({
   host,
@@ -41,7 +40,6 @@ export function HostDetailDialog({
   onClose: () => void;
   onCommand: (hostname: string) => void;
 }) {
-  const { t } = useTranslation();
   const [history, setHistory] = useState<JsonData[]>([]);
   const [loading, setLoading] = useState(false);
   const [hours, setHours] = useState(1);
@@ -80,21 +78,21 @@ export function HostDetailDialog({
             <Server className="h-5 w-5 dg-text-blue" />
             {host.hostname}
             {online ? (
-              <Badge className="bg-emerald-500/15 dg-text-green border border-emerald-500/30">{t('common.online')}</Badge>
+              <Badge className="bg-emerald-500/15 dg-text-green border border-emerald-500/30">在线</Badge>
             ) : (
-              <Badge className="bg-red-500/15 dg-text-red border border-red-500/30">{t('common.offline')}</Badge>
+              <Badge className="bg-red-500/15 dg-text-red border border-red-500/30">离线</Badge>
             )}
           </DialogTitle>
-          <DialogDescription className="sr-only">{t('agent.hostdetaildialog.sffa4f7')}</DialogDescription>
+          <DialogDescription className="sr-only">查看主机详情和指标趋势</DialogDescription>
         </DialogHeader>
 
         <div className="space-y-4">
           {/* 基本信息 */}
           <div className="grid grid-cols-2 md:grid-cols-4 gap-3 text-sm">
-            <InfoCell label=t('agent.agentIp') value={host.ip || '--'} />
-            <InfoCell label=t('server.csv.os') value={host.os || host.platform || '--'} />
-            <InfoCell label=t('agent.agentLastSeen') value={timeAgo(host.last_report || host.last_reported_at || host.updated_at)} />
-            <InfoCell label=t('agent.hostdetaildialog.s6ad4fc') value={String(ports.length)} />
+            <InfoCell label="IP 地址" value={host.ip || '--'} />
+            <InfoCell label="操作系统" value={host.os || host.platform || '--'} />
+            <InfoCell label="最后上报" value={timeAgo(host.last_report || host.last_reported_at || host.updated_at)} />
+            <InfoCell label="端口数" value={String(ports.length)} />
           </div>
 
           {/* 趋势图 */}
@@ -109,9 +107,9 @@ export function HostDetailDialog({
                   <SelectValue />
                 </SelectTrigger>
                 <SelectContent className="dg-input">
-                  <SelectItem value="1">{t('agent.hostdetaildialog.s3851af')}</SelectItem>
-                  <SelectItem value="6">{t('agent.hostdetaildialog.s2d59b1')}</SelectItem>
-                  <SelectItem value="24">{t('agent.hostdetaildialog.s768a1b')}</SelectItem>
+                  <SelectItem value="1">最近 1 小时</SelectItem>
+                  <SelectItem value="6">最近 6 小时</SelectItem>
+                  <SelectItem value="24">最近 24 小时</SelectItem>
                 </SelectContent>
               </Select>
             </div>
@@ -121,7 +119,7 @@ export function HostDetailDialog({
                   <Loader2 className="h-5 w-5 animate-spin dg-text-muted" />
                 </div>
               ) : chartData.length === 0 ? (
-                <div className="h-full flex items-center justify-center text-sm dg-text-muted">{t('agent.hostdetaildialog.sdc73db')}</div>
+                <div className="h-full flex items-center justify-center text-sm dg-text-muted">暂无历史数据</div>
               ) : (
                 <ResponsiveContainer width="100%" height="100%">
                   <AreaChart data={chartData} margin={{ top: 5, right: 5, bottom: 0, left: -20 }}>
@@ -146,8 +144,8 @@ export function HostDetailDialog({
                       contentStyle={{ backgroundColor: '#0f172a', border: '1px solid #1e293b', borderRadius: '6px', color: '#f8fafc', fontSize: '12px' }}
                     />
                     <Area type="monotone" dataKey="cpu" stroke="#3b82f6" fill="url(#gCpu)" name="CPU" />
-                    <Area type="monotone" dataKey="mem" stroke="#10b981" fill="url(#gMem)" name=t('k8s.pods.memory') />
-                    <Area type="monotone" dataKey="disk" stroke="#f59e0b" fill="url(#gDisk)" name=t('dashboard.topUsage.disk') />
+                    <Area type="monotone" dataKey="mem" stroke="#10b981" fill="url(#gMem)" name="内存" />
+                    <Area type="monotone" dataKey="disk" stroke="#f59e0b" fill="url(#gDisk)" name="磁盘" />
                   </AreaChart>
                 </ResponsiveContainer>
               )}
@@ -161,7 +159,7 @@ export function HostDetailDialog({
               端口发现 ({ports.length})
             </span>
             {ports.length === 0 ? (
-              <p className="text-xs dg-text-muted">{t('agent.hostdetaildialog.se7887d')}</p>
+              <p className="text-xs dg-text-muted">暂无端口数据</p>
             ) : (
               <div className="flex flex-wrap gap-1.5 max-h-32 overflow-y-auto">
                 {ports.map((p, idx) => (
@@ -193,7 +191,6 @@ export function HostDetailDialog({
 }
 
 function InfoCell({ label, value }: { label: string; value: string }) {
-  const { t } = useTranslation();
   return (
     <div className="bg-[var(--dg-bg-primary)] border border-[var(--dg-border)] rounded-lg px-3 py-2">
       <div className="text-xs dg-text-muted">{label}</div>