refactor(frontend): API 子模块化、大组件拆分与 TanStack Query hooks

P1: kubernetes/system API 拆为子目录模块，导出工具下沉到 lib/export-utils，
    http 统一 buildApiUrl/getWsBase；HostMonitor、DeploymentEdit* 拆至子组件。

P2: 新增 hooks/api（queryKeys、useTerminalSessions、useHostMonitor），
    TerminalSessionsTab 与 HostMonitor 接入 TanStack Query。

P3: 保留 services/api 路径，未迁移至 api/ 目录。

backend/static/assets/badge-3UzCvU7L.js

@@ -0,0 +1 @@
+import{j as n,a1 as s,a0 as o,a2 as d}from"./index-Dmami9WE.js";const c=d("inline-flex items-center justify-center rounded-full border px-2 py-0.5 text-xs font-medium w-fit whitespace-nowrap shrink-0 [&>svg]:size-3 gap-1 [&>svg]:pointer-events-none focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-[3px] aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive transition-[color,box-shadow] overflow-hidden",{variants:{variant:{default:"border-transparent bg-primary text-primary-foreground [a&]:hover:bg-primary/90",secondary:"border-transparent bg-secondary text-secondary-foreground [a&]:hover:bg-secondary/90",destructive:"border-transparent bg-destructive text-white [a&]:hover:bg-destructive/90 focus-visible:ring-destructive/20 dark:focus-visible:ring-destructive/40 dark:bg-destructive/60",outline:"text-foreground [a&]:hover:bg-accent [a&]:hover:text-accent-foreground"}},defaultVariants:{variant:"default"}});function v({className:e,variant:r,asChild:t=!1,...a}){const i=t?s:"span";return n.jsx(i,{"code-path":"src/components/ui/badge.tsx:38:5","data-slot":"badge",className:o(c({variant:r}),e),...a})}export{v as B};