feat(i18n): 安全批量转换 135 文件 — 覆盖率 34%→62%

使用 i18n.t() 全局方式（避免 hook 定位问题）:
- 288 目标文件中 135 个成功转换
- 2228 处中文替换为 i18n.t() 调用
- 1006 个新翻译 key 添加到 zh-CN.json + en-US.json
- 词典总量: 3554 keys (22 namespaces)
- tsc 零错误 + Vite 构建成功
- 6 个含代码示例/数据字符串的文件安全回退

frontend/src/components/monitor/datasource/PrometheusDatasourceManager.tsx

@@ -23,6 +23,7 @@ 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 i18n from '@/i18n';
 
 export default function PrometheusDatasourceManager() {
   const _confirm = useConfirm();
@@ -33,7 +34,7 @@ export default function PrometheusDatasourceManager() {
   const [editingDs, setEditingDs] = useState<PromDS | null>(null);
 
   useEffect(() => {
-    if (isError) toast.error('获取数据源列表失败');
+    if (isError) toast.error(i18n.t('monitor.zabbixdatasourc.s45f81749'));
   }, [isError]);
 
   const openCreate = () => {
@@ -48,16 +49,16 @@ export default function PrometheusDatasourceManager() {
 
   const handleDelete = async (ds: PromDS) => {
     const ok = await _confirm({
-      title: '删除数据源',
+      title: i18n.t('monitor.deleteDatasource'),
       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('已删除');
+      toast.success(i18n.t('monitor.silenceRules.deleted'));
     } catch {
-      toast.error('删除失败');
+      toast.error(i18n.t('kubernetes.msg.deleteFailed2'));
     }
   };
 
@@ -66,7 +67,7 @@ export default function PrometheusDatasourceManager() {
       await setDefaultMutation.mutateAsync(ds.id);
       toast.success(`已将「${ds.name}」设为默认数据源`);
     } catch {
-      toast.error('设置失败');
+      toast.error(i18n.t('monitor.zabbixdatasourc.s9f96034c'));
     }
   };
 
@@ -94,8 +95,8 @@ export default function PrometheusDatasourceManager() {
         {sources.length === 0 ? (
           <PageEmpty
             icon={<Database className="h-12 w-12" />}
-            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"
+            title={i18n.t('monitor.prometheusdatas.s99ed81c8')}
+            description={i18n.t('monitor.prometheusdatas.sd9a356b8')}
             action={(
               <Button onClick={openCreate} size="sm" className="dg-btn-primary">
                 <Plus className="w-4 h-4 mr-1" />添加数据源
@@ -107,11 +108,11 @@ 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">名称</th>
+                  <th className="text-left py-3 px-4 font-medium"> {i18n.t('kubernetes.secret.secretName')} </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">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>
+                  <th className="text-left py-3 px-4 font-medium w-20"> {i18n.t('k8s.storage.default')} </th>
+                  <th className="text-left py-3 px-4 font-medium w-16"> {i18n.t('system.terminalStatus')} </th>
+                  <th className="text-right py-3 px-4 font-medium w-36"> {i18n.t('system.auditAction')} </th>
                 </tr>
               </thead>
               <tbody>
@@ -142,16 +143,16 @@ 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" />默认</span>
+                        <span className="dg-badge-yellow"><Star className="w-3 h-3 mr-1 inline" /> {i18n.t('k8s.storage.default')} </span>
                       ) : (
                         <span className="text-xs dg-text-muted">--</span>
                       )}
                     </td>
                     <td className="py-3 px-4">
                       {ds.status === 1 ? (
-                        <span className="dg-status-running">启用</span>
+                        <span className="dg-status-running"> {i18n.t('system.userActive')} </span>
                       ) : (
-                        <span className="dg-badge-muted">禁用</span>
+                        <span className="dg-badge-muted"> {i18n.t('system.userInactive')} </span>
                       )}
                     </td>
                     <td className="py-3 px-4">
@@ -160,7 +161,7 @@ export default function PrometheusDatasourceManager() {
                           variant="ghost" size="sm"
                           className="h-8 px-2"
                           onClick={() => handleTestQuick(ds)}
-                          title="测试连接"
+                          title={i18n.t('aiops.llmTest')}
                         >
                           <Plug className="w-3.5 h-3.5" />
                         </Button>
@@ -169,7 +170,7 @@ export default function PrometheusDatasourceManager() {
                             variant="ghost" size="sm"
                             className="h-8 px-2 dg-text-yellow"
                             onClick={() => handleSetDefault(ds)}
-                            title="设为默认"
+                            title={i18n.t('aiops.llmSetDefault')}
                           >
                             <Star className="w-3.5 h-3.5" />
                           </Button>