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/monitor/datasource/PrometheusDatasourceManager.tsx

@@ -23,10 +23,8 @@ import PromDsFormDialog from './prometheus-ds/PromDsFormDialog';
 import { PageLoading } from '@/components/layout/PageLoading';
 import { PageEmpty } from '@/components/layout/PageEmpty';
 import { ContentPanel } from '@/components/layout/ContentPanel';
-import { useTranslation } from 'react-i18next';
 
 export default function PrometheusDatasourceManager() {
-  const { t } = useTranslation();
   const _confirm = useConfirm();
   const { data: sources = [], isLoading, isError } = usePromDatasources();
   const { deleteMutation, setDefaultMutation } = usePromDatasourceMutations();
@@ -35,7 +33,7 @@ export default function PrometheusDatasourceManager() {
   const [editingDs, setEditingDs] = useState<PromDS | null>(null);
 
   useEffect(() => {
-    if (isError) toast.error(t('monitor.prometheusdatasourcemanager.s45f817'));
+    if (isError) toast.error('获取数据源列表失败');
   }, [isError]);
 
   const openCreate = () => {
@@ -50,25 +48,25 @@ export default function PrometheusDatasourceManager() {
 
   const handleDelete = async (ds: PromDS) => {
     const ok = await _confirm({
-      title: t('monitor.deleteDatasource'),
-      description: t('monitor.prometheusdatasourcemanager.s623d90', { ds.name: ds.name }),
+      title: '删除数据源',
+      description: `确定删除数据源「${ds.name}」吗？此操作不可撤销。`,
       variant: 'destructive',
     });
     if (!ok) return;
     try {
       await deleteMutation.mutateAsync(ds.id);
-      toast.success(t('alert.deleted'));
+      toast.success('已删除');
     } catch {
-      toast.error(t('common.deleteFailed'));
+      toast.error('删除失败');
     }
   };
 
   const handleSetDefault = async (ds: PromDS) => {
     try {
       await setDefaultMutation.mutateAsync(ds.id);
-      toast.success(t('monitor.prometheusdatasourcemanager.sa8bcc7', { ds.name: ds.name }));
+      toast.success(`已将「${ds.name}」设为默认数据源`);
     } catch {
-      toast.error(t('monitor.prometheusdatasourcemanager.s9f9603'));
+      toast.error('设置失败');
     }
   };
 
@@ -96,8 +94,8 @@ export default function PrometheusDatasourceManager() {
         {sources.length === 0 ? (
           <PageEmpty
             icon={<Database className="h-12 w-12" />}
-            title=t('monitor.prometheusdatasourcemanager.s99ed81')
-            description=t('monitor.prometheusdatasourcemanager.sd9a356')
+            title="暂无 Prometheus 数据源"
+            description="添加数据源后可用于指标监控与监控大屏"
             action={(
               <Button onClick={openCreate} size="sm" className="dg-btn-primary">
                 <Plus className="w-4 h-4 mr-1" />添加数据源
@@ -109,11 +107,11 @@ export default function PrometheusDatasourceManager() {
             <table className="w-full">
               <thead className="border-b border-[var(--border-default)]">
                 <tr className="text-xs dg-text-secondary">
-                  <th className="text-left py-3 px-4 font-medium">{t('common.name')}</th>
+                  <th className="text-left py-3 px-4 font-medium">名称</th>
                   <th className="text-left py-3 px-4 font-medium">URL</th>
-                  <th className="text-left py-3 px-4 font-medium w-20">{t('approval.status.default')}</th>
-                  <th className="text-left py-3 px-4 font-medium w-16">{t('common.status')}</th>
-                  <th className="text-right py-3 px-4 font-medium w-36">{t('common.actions')}</th>
+                  <th className="text-left py-3 px-4 font-medium w-20">默认</th>
+                  <th className="text-left py-3 px-4 font-medium w-16">状态</th>
+                  <th className="text-right py-3 px-4 font-medium w-36">操作</th>
                 </tr>
               </thead>
               <tbody>
@@ -144,16 +142,16 @@ export default function PrometheusDatasourceManager() {
                     </td>
                     <td className="py-3 px-4">
                       {ds.is_default ? (
-                        <span className="dg-badge-yellow"><Star className="w-3 h-3 mr-1 inline" />{t('approval.status.default')}</span>
+                        <span className="dg-badge-yellow"><Star className="w-3 h-3 mr-1 inline" />默认</span>
                       ) : (
                         <span className="text-xs dg-text-muted">--</span>
                       )}
                     </td>
                     <td className="py-3 px-4">
                       {ds.status === 1 ? (
-                        <span className="dg-status-running">{t('common.enable')}</span>
+                        <span className="dg-status-running">启用</span>
                       ) : (
-                        <span className="dg-badge-muted">{t('common.disable')}</span>
+                        <span className="dg-badge-muted">禁用</span>
                       )}
                     </td>
                     <td className="py-3 px-4">
@@ -162,7 +160,7 @@ export default function PrometheusDatasourceManager() {
                           variant="ghost" size="sm"
                           className="h-8 px-2"
                           onClick={() => handleTestQuick(ds)}
-                          title=t('aiops.llmTest')
+                          title="测试连接"
                         >
                           <Plug className="w-3.5 h-3.5" />
                         </Button>
@@ -171,7 +169,7 @@ export default function PrometheusDatasourceManager() {
                             variant="ghost" size="sm"
                             className="h-8 px-2 dg-text-yellow"
                             onClick={() => handleSetDefault(ds)}
-                            title=t('aiops.llmSetDefault')
+                            title="设为默认"
                           >
                             <Star className="w-3.5 h-3.5" />
                           </Button>