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/AgentAlerts.tsx

@@ -28,10 +28,8 @@ import {
 } from './agentAlertHelper';
 import { AgentRuleDialog } from './AgentRuleDialog';
 import type { JsonData } from '@/types/common';
-import { useTranslation } from 'react-i18next';
 
 export function AgentAlerts() {
-  const { t } = useTranslation();
   const confirm = useConfirm();
   const [activeTab, setActiveTab] = useState('events');
   const [alerts, setAlerts] = useState<JsonData[]>([]);
@@ -54,7 +52,7 @@ export function AgentAlerts() {
       setRules(asList(rulesRes));
     } catch (err) {
       console.error(err);
-      toast.error(t('agent.agentalerts.s7ffaa4'));
+      toast.error('加载告警数据失败');
     } finally {
       setLoading(false);
     }
@@ -66,14 +64,14 @@ export function AgentAlerts() {
 
   // ============ 告警事件 ============
   const handleResolve = async (id: number) => {
-    const ok = await confirm({ title: t('agent.agentalerts.sd56d01'), description: t('agent.agentalerts.s99f0fb'), confirmText: t('common.resume') });
+    const ok = await confirm({ title: '恢复告警', description: '确定将此告警标记为已恢复？', confirmText: '恢复' });
     if (!ok) return;
     try {
       await agentApi.resolveAlert(id);
-      toast.success(t('agent.agentalerts.s0e2352'));
+      toast.success('告警已恢复');
       loadData();
     } catch (err) {
-      toast.error(err?.message || t('common.operationFailed'));
+      toast.error(err?.message || '操作失败');
     }
   };
 
@@ -89,14 +87,14 @@ export function AgentAlerts() {
   };
 
   const handleDeleteRule = async (id: number) => {
-    const ok = await confirm({ title: t('alert.deleteRule'), description: t('agent.agentalerts.sd30155'), confirmText: t('common.delete'), variant: 'destructive' });
+    const ok = await confirm({ title: '删除规则', description: '确定删除此告警规则？', confirmText: '删除', variant: 'destructive' });
     if (!ok) return;
     try {
       await agentApi.deleteRule(id);
-      toast.success(t('agent.agentalerts.s8b2798'));
+      toast.success('规则已删除');
       loadData();
     } catch (err) {
-      toast.error(err?.message || t('common.deleteFailed'));
+      toast.error(err?.message || '删除失败');
     }
   };
 
@@ -105,7 +103,7 @@ export function AgentAlerts() {
       await agentApi.updateRule(rule.id, { ...rule, enabled: !rule.enabled });
       loadData();
     } catch (err) {
-      toast.error(err?.message || t('common.operationFailed'));
+      toast.error(err?.message || '操作失败');
     }
   };
 
@@ -114,8 +112,8 @@ export function AgentAlerts() {
       {/* 页头 */}
       <div className="flex items-center justify-between">
         <div>
-          <h2 className="text-xl font-semibold text-[var(--dg-text-primary)]">{t('agent.agentalerts.s87efbd')}</h2>
-          <p className="text-sm dg-text-secondary mt-0.5">{t('agent.agentalerts.s03a08c')}</p>
+          <h2 className="text-xl font-semibold text-[var(--dg-text-primary)]">Agent 告警</h2>
+          <p className="text-sm dg-text-secondary mt-0.5">基于 Agent 上报指标的告警规则与事件</p>
         </div>
         <Button variant="outline" size="sm" onClick={loadData} disabled={loading} className="dg-input text-[var(--dg-text-secondary)] hover:bg-[var(--dg-bg-hover)]">
           <RefreshCw className={`h-4 w-4 mr-1.5 ${loading ? 'animate-spin' : ''}`} />
@@ -125,8 +123,8 @@ export function AgentAlerts() {
 
       <Tabs value={activeTab} onValueChange={setActiveTab} className="w-full">
         <TabsList className="bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)]">
-          <TabsTrigger value="events" className="data-[state=active]:bg-[var(--dg-bg-active)]">{t('agent.agentalerts.s0e5b83')}</TabsTrigger>
-          <TabsTrigger value="rules" className="data-[state=active]:bg-[var(--dg-bg-active)]">{t('alert.tab.rules')}</TabsTrigger>
+          <TabsTrigger value="events" className="data-[state=active]:bg-[var(--dg-bg-active)]">告警事件</TabsTrigger>
+          <TabsTrigger value="rules" className="data-[state=active]:bg-[var(--dg-bg-active)]">告警规则</TabsTrigger>
         </TabsList>
 
         {/* ========== 告警事件 ========== */}
@@ -154,14 +152,14 @@ export function AgentAlerts() {
             <Card className="dg-card">
               <CardContent className="flex items-center justify-center py-16">
                 <Loader2 className="h-5 w-5 animate-spin dg-text-muted" />
-                <span className="ml-2 dg-text-secondary">{t('common.loading')}</span>
+                <span className="ml-2 dg-text-secondary">加载中...</span>
               </CardContent>
             </Card>
           ) : alerts.length === 0 ? (
             <Card className="dg-card">
               <CardContent className="flex flex-col items-center justify-center py-16">
                 <CheckCircle className="h-10 w-10 text-emerald-500 mb-3" />
-                <p className="dg-text-secondary">{resolvedView ? t('agent.agentalerts.se459f4') : t('agent.agentalerts.s778455')}</p>
+                <p className="dg-text-secondary">{resolvedView ? '暂无已恢复的告警' : '当前无活动告警，一切正常'}</p>
               </CardContent>
             </Card>
           ) : (
@@ -177,20 +175,20 @@ export function AgentAlerts() {
                         <div className="min-w-0">
                           <div className="flex items-center gap-2 flex-wrap">
                             {severityBadge(alert.severity)}
-                            <span className="font-medium text-[var(--dg-text-primary)]">{alert.rule_name || alert.name || alert.title || t('dashboard.stat.alerts')}</span>
+                            <span className="font-medium text-[var(--dg-text-primary)]">{alert.rule_name || alert.name || alert.title || '告警'}</span>
                           </div>
-                          <p className="text-sm dg-text-secondary mt-1">{alert.message || alert.description || t('agent.agentalerts.sddab4a')}</p>
+                          <p className="text-sm dg-text-secondary mt-1">{alert.message || alert.description || '触发告警阈值'}</p>
                           <div className="flex items-center gap-4 mt-2 text-xs dg-text-muted flex-wrap">
                             <span className="inline-flex items-center gap-1">
                               <Cpu className="h-3 w-3" />
                               {alert.hostname || '--'}
                             </span>
                             <span className="inline-flex items-center gap-1">
-                              <span className="dg-text-secondary">{t('agent.agentalerts.sbfdcf2')}</span> {getMetricLabel(alert.metric)}
+                              <span className="dg-text-secondary">指标:</span> {getMetricLabel(alert.metric)}
                             </span>
                             {alert.value != null && (
                               <span className="inline-flex items-center gap-1">
-                                <span className="dg-text-secondary">{t('agent.agentalerts.s2d1376')}</span> {alert.value}
+                                <span className="dg-text-secondary">当前值:</span> {alert.value}
                               </span>
                             )}
                             <span className="inline-flex items-center gap-1">
@@ -232,14 +230,14 @@ export function AgentAlerts() {
             <Card className="dg-card">
               <CardContent className="flex items-center justify-center py-16">
                 <Loader2 className="h-5 w-5 animate-spin dg-text-muted" />
-                <span className="ml-2 dg-text-secondary">{t('common.loading')}</span>
+                <span className="ml-2 dg-text-secondary">加载中...</span>
               </CardContent>
             </Card>
           ) : rules.length === 0 ? (
             <Card className="dg-card">
               <CardContent className="flex flex-col items-center justify-center py-16">
                 <Bell className="h-10 w-10 dg-text-muted mb-3" />
-                <p className="dg-text-secondary">{t('alert.noRules')}</p>
+                <p className="dg-text-secondary">暂无告警规则</p>
                 <Button size="sm" onClick={openCreateRule} className="mt-4 bg-blue-600 hover:bg-blue-700 text-white">
                   <Plus className="h-4 w-4 mr-1.5" />
                   创建第一条规则
@@ -263,7 +261,7 @@ export function AgentAlerts() {
                               <span className="font-medium text-[var(--dg-text-primary)]">{rule.name}</span>
                               {severityBadge(rule.severity)}
                               {rule.enabled === false && (
-                                <Badge className="bg-[var(--dg-bg-active)] dg-text-secondary border border-[var(--dg-border-hover)]">{t('alert.disabled')}</Badge>
+                                <Badge className="bg-[var(--dg-bg-active)] dg-text-secondary border border-[var(--dg-border-hover)]">已禁用</Badge>
                               )}
                             </div>
                             <div className="flex items-center gap-3 mt-1.5 text-xs dg-text-muted flex-wrap">