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/layout/Breadcrumb.tsx

@@ -51,7 +51,7 @@ const ROUTE_NAME_MAP: Record<string, string> = {
   'datasources': i18n.t('menu.datasources'),
   'dashboards': i18n.t('menu.grafana'),
   'host-monitor': i18n.t('monitor.hostMonitor'),
-  'alerts': i18n.t('ui.breadcrumb.sa57c10'),
+  'alerts': '监控告警',
   'approval': i18n.t('menu.approval'),
   'approval-resource': i18n.t('menu.approval'),
   'approval-app': i18n.t('menu.approvalApp'),
@@ -138,13 +138,13 @@ export function Breadcrumb() {
 
   return (
     <nav
-      aria-label=t('ui.breadcrumb.s357625')
+      aria-label={t('common.breadcrumbNav')}
       className="flex items-center gap-1.5 text-sm animate-fade-in"
     >
       <Link
         to="/"
         className="flex items-center gap-1 text-[var(--dg-text-muted)] hover:text-[var(--dg-blue)] transition-colors duration-200"
-        title=t('menu.dashboard')
+        title={t('menu.dashboard')}
       >
         <Home className="h-3.5 w-3.5" />
       </Link>

frontend/src/components/layout/ErrorBoundary.tsx

@@ -2,6 +2,7 @@ import { Component, type ErrorInfo, type ReactNode } from 'react';
 import { Button } from '@/components/ui/button';
 import { AlertTriangle, RotateCcw, Home, Bug } from 'lucide-react';
 import { toast } from 'sonner';
+import { useTranslation } from 'react-i18next';
 import i18n from '@/i18n';
 
 interface Props {
@@ -32,8 +33,8 @@ export class ErrorBoundary extends Component<Props, State> {
   }
 
   override componentDidCatch(error: Error, errorInfo: ErrorInfo) {
-    console.error(i18n.t('ui.errorboundary.sc0bdc3'), error);
-    console.error(i18n.t('ui.errorboundary.s1f72f8'), errorInfo.componentStack);
+    console.error(i18n.t('common.ebCaughtError'), error);
+    console.error(i18n.t('common.ebErrorInfo'), errorInfo.componentStack);
     this.setState({ error, errorInfo });
   }
 
@@ -47,11 +48,11 @@ export class ErrorBoundary extends Component<Props, State> {
 
   handleReport = () => {
     const { error, errorInfo } = this.state;
-    const body = i18n.t('ui.errorboundary.s8f0ca2', { new Date().toISOString(): new Date().toISOString(), window.location.href: window.location.href, navigator.userAgent: navigator.userAgent, error?.name: error?.name, error?.message: error?.message, errorInfo?.componentStack: errorInfo?.componentStack });
+    const body = `## 错误报告\n\n**时间:** ${new Date().toISOString()}\n**URL:** ${window.location.href}\n**用户代理:** ${navigator.userAgent}\n\n### 错误信息\n\n\`\`\`\n${error?.name}: ${error?.message}\n\`\`\`\n\n### 组件堆栈\n\n\`\`\`\n${errorInfo?.componentStack}\n\`\`\`\n`;
     navigator.clipboard.writeText(body).then(() => {
-      toast.success(i18n.t('ui.errorboundary.sf29c9d'));
+      toast.success(i18n.t('common.errorCopiedToClipboard'));
     }).catch(() => {
-      toast.error(i18n.t('ui.errorboundary.s7b5065'));
+      toast.error(i18n.t('common.copyFailedManual'));
     });
   };
 
@@ -116,7 +117,7 @@ export class ErrorBoundary extends Component<Props, State> {
                 onClick={this.handleRetry}
               >
                 <RotateCcw className="h-4 w-4 mr-1.5" />
-                重新加载
+                {i18n.t('common.reload')}
               </Button>
               <Button
                 variant="outline"