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/deploy/PipelineManager.tsx

@@ -40,8 +40,7 @@ import {
   Package,
 } from 'lucide-react';
 
-import { pipelineApi, deployApi } from '@/services/api';
-import http from '@/services/http';
+import { credentialApi, deployApi, pipelineApi } from '@/services/api';
 import { useConfirm } from '@/components/ui/confirm-dialog';
 import { toast } from 'sonner';
 import { nameToCode, getStatusBadge } from './pipeline-helpers';
@@ -140,7 +139,7 @@ export function PipelineManager() {
         deployApi.getRepos().catch(() => ({ list: [] })),
         deployApi.getRegistries().catch(() => ({ list: [] })),
         deployApi.getEnvironments().catch(() => ({ list: [] })),
-        http.get('/credentials', { page_size: 100 }).catch(() => ({ list: [] })),
+        credentialApi.list({ page_size: 100 }).catch(() => ({ list: [] })),
       ] as const);
       setRepos(Array.isArray((rR as Record<string, any>)?.list) ? (rR as Record<string, any>).list : []);
       setRegistries(Array.isArray((rReg as Record<string, any>)?.list) ? (rReg as Record<string, any>).list : []);
@@ -891,7 +890,7 @@ function PipelineQueuePanel({ pipeline, clusterId: _cid }: { pipeline: any; clus
     if (!code) return;
     setLoading(true);
     try {
-      const res: Record<string, any> = await http.get(`/pipelines/${code}/queue`);
+      const res: Record<string, any> = await pipelineApi.getQueue(code);
       setQueue(res?.data || res);
     } catch { setQueue(null); }
     finally { setLoading(false); }
@@ -901,7 +900,7 @@ function PipelineQueuePanel({ pipeline, clusterId: _cid }: { pipeline: any; clus
 
   const handleCancel = async (runId: number) => {
     try {
-      await http.delete(`/pipelines/${code}/queue/${runId}`);
+      await pipelineApi.removeFromQueue(code, runId);
       toast.success('已取消');
       loadQueue();
     } catch { toast.error('取消失败'); }