refactor(frontend): P1-P2 架构统一 — utils/hooks/api 模块化

P1:
- utils/storage.ts、theme.ts、validate.ts + index 统一出口
- request/store/useTheme 接入 storage；清零 confirm/alert
- PipelineManager、TerminalAuditTab 拆分子模块（<700行红线）

P2:
- api/monitor、api/deploy 子目录化
- hooks/api 扩展：servers/pipelines/alerts/audit/sessionCommands
- PipelineManager、AuditOperationsTab 接入 TanStack Query

backend/static/assets/credential-snjgV65G.js

@@ -0,0 +1 @@
+import{h as t}from"./index-HuRw9UhJ.js";const a={list:e=>t.get("/credentials",e),get:e=>t.get(`/credentials/${e}`),create:e=>t.post("/credentials",e),update:(e,s)=>t.put(`/credentials/${e}`,s),delete:e=>t.delete(`/credentials/${e}`),toggleActive:(e,s)=>t.put(`/credentials/${e}`,{is_active:s})},r={assign:(e,s)=>t.post(`/servers/${e}/assign-credential`,{credential_id:s})};export{a as c,r as s};