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

frontend/src/hooks/api/useTerminalSessions.ts

@@ -3,6 +3,7 @@
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { terminalSessionApi } from '@/api';
 import { queryKeys } from './queryKeys';
+import { unwrapList } from './unwrap';
 
 export interface TerminalSession {
   id: number;
@@ -28,14 +29,6 @@ type ListParams = {
   status?: string;
 };
 
-function unwrapList<T>(data: unknown): T[] {
-  if (Array.isArray(data)) return data;
-  if (data && typeof data === 'object' && 'list' in data) {
-    return (data as { list: T[] }).list ?? [];
-  }
-  return [];
-}
-
 export function useTerminalSessions(params: ListParams = { page: 1, page_size: 100 }) {
   return useQuery({
     queryKey: queryKeys.terminalSessions(params),