refactor(frontend): P0 API 层收口与 http 统一

- 统一 http.ts baseURL：get/post/download/upload 均走 resolveApiUrl
- agentUtils 下沉至 lib/agent-utils，API 层移除对 components 的依赖
- 扩展 metricsApi/snmpApi/prometheusProxyApi/zabbixProxyApi
- 扩展 pipelineApi/credentialApi 覆盖流水线与凭证场景
- 14 个组件/页面禁止直连 http，统一走 @/services/api

frontend/src/components/monitor/dashboard/GrafanaDashboard.tsx

@@ -39,8 +39,7 @@ import { dashboardApi, promDatasourceApi, zabbixDatasourceApi, agentApi, serverA
 import { GrafanaPanelContent } from './GrafanaPanelContent';
 import { ZabbixDashboard } from './ZabbixDashboard';
 import { PrometheusDashboard } from './PrometheusDashboard';
-import { http } from '@/services/http';
-import { asList } from '@/components/agent/agentUtils';
+import { asList } from '@/lib/agent-utils';
 import { AgentWizard } from '@/components/agent/AgentWizard';
 import { Checkbox } from '@/components/ui/checkbox';
 import { useConfirm } from '@/components/ui/confirm-dialog';
@@ -94,7 +93,7 @@ const AgentTab: React.FC = () => {
     finally { setBatchUninstalling(false); }
   };
   const totalPages = Math.max(1, Math.ceil(hosts.length / pageSize));
-  const fetch = async () => { try { setHosts(asList(await http.get('/agent/latest'))); } catch {} finally { setLoading(false); } };
+  const fetch = async () => { try { setHosts(asList(await agentApi.getLatest())); } catch {} finally { setLoading(false); } };
   useEffect(() => { fetch(); const t = setInterval(fetch, 30000); return () => clearInterval(t); }, []);
   const toggle = (f: SortField) => { if (sf === f) setSd(d => d === 'asc' ? 'desc' : 'asc'); else { setSf(f); setSd('desc'); } };
   const sorted = [...hosts].sort((a, b) => {

frontend/src/components/monitor/dashboard/PrometheusDashboard.tsx

@@ -6,7 +6,7 @@ import { Badge } from '@/components/ui/badge';
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
 import { StatStrip } from '@/components/ui/stat-strip';
 import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs';
-import { http } from '@/services/http';
+import { prometheusProxyApi } from '@/services/api';
 
 interface Props { dsUrl?: string; }
 
@@ -139,7 +139,7 @@ export const PrometheusDashboard: React.FC<Props> = ({ dsUrl }) => {
   const doConnect = async (u: string) => {
     setLoading(true); setError('');
     try {
-      const data: Record<string, any> = await http.post('/prometheus/connect', { url: u });
+      const data: Record<string, any> = await prometheusProxyApi.connect(u);
       setConnected(true); setTargets(data.targets||0);
       loadAll(u);
     } catch (e: any) { setConnected(false); setError((e as Record<string, any>).message||'连接失败'); }
@@ -149,7 +149,7 @@ export const PrometheusDashboard: React.FC<Props> = ({ dsUrl }) => {
   const loadAll = async (u: string) => {
     for (const t of ['kubernetes','node','pod','jvm']) {
       try {
-        const data: Record<string, any> = await http.post('/prometheus/dashboard', { url: u, type: t });
+        const data: Record<string, any> = await prometheusProxyApi.dashboard(u, t);
         const items: Record<string, any> = {};
         for (const [k, v] of Object.entries(data||{}))
           items[k] = Array.isArray(v) ? v : ((v as Record<string, any>)?.data?.result ? parsePrune((v as Record<string, any>).data.result) : v);

frontend/src/components/monitor/dashboard/ZabbixDashboard.tsx

@@ -16,7 +16,7 @@ import {
 import { Button } from '@/components/ui/button';
 import { Badge } from '@/components/ui/badge';
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
-import { http } from '@/services/http';
+import { zabbixProxyApi } from '@/services/api';
 
 interface ZabbixHost {
   hostid: string; hostname: string; name: string; ip: string; available: string;
@@ -45,7 +45,7 @@ export const ZabbixDashboard: React.FC<Props> = ({ dsUrl, dsUsername, dsPassword
   const doConnect = async (u: string, un: string, pw: string) => {
     setLoading(true); setError('');
     try {
-      const data: Record<string, any> = await http.post('/zabbix/connect', { url: u, username: un, password: pw });
+      const data: Record<string, any> = await zabbixProxyApi.connect(u, un, pw);
       setHosts(data.hosts || []);
       setVersion(data.version || '');
       setConnected(true);