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/site-DAeTLSaK.js

@@ -0,0 +1 @@
+import{h as s}from"./index-HuRw9UhJ.js";const r={getStats:async()=>s.get("/site/stats"),getTasks:async()=>s.get("/site/tasks"),createTask:async t=>s.post("/site/tasks",t),deleteTask:async t=>s.delete(`/site/tasks/${t}`),toggleTask:async(t,e)=>s.put(`/site/tasks/${t}`,{enabled:e})};export{r as s};