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/stat-strip-BteRU1Iu.js

@@ -0,0 +1 @@
+import{j as t,a0 as s}from"./index-Dmami9WE.js";const o={blue:{text:"text-blue-400",bg:"bg-blue-500/20"},emerald:{text:"text-emerald-400",bg:"bg-emerald-500/20"},amber:{text:"text-amber-400",bg:"bg-amber-500/20"},red:{text:"text-red-400",bg:"bg-red-500/20"},purple:{text:"text-purple-400",bg:"bg-purple-500/20"},cyan:{text:"text-cyan-400",bg:"bg-cyan-500/20"},muted:{text:"text-[var(--dg-text-secondary)]",bg:"bg-[var(--dg-bg-tertiary)]"}};function d({items:c,className:n}){return t.jsx("div",{"code-path":"src/components/ui/stat-strip.tsx:29:5",className:s("flex items-center gap-1.5 px-3 py-2 rounded-lg","bg-[var(--dg-bg-secondary)] border border-[var(--dg-border)]","overflow-x-auto",n),children:c.map((e,r)=>{const a=o[e.color||"muted"]||o.muted;return t.jsxs("div",{"code-path":"src/components/ui/stat-strip.tsx:38:11",className:"flex items-center gap-1.5 shrink-0",children:[r>0&&t.jsx("span",{"code-path":"src/components/ui/stat-strip.tsx:40:15",className:"w-px h-5 bg-[var(--dg-border)] mx-1 shrink-0"}),t.jsx("span",{"code-path":"src/components/ui/stat-strip.tsx:42:13",className:s("w-1.5 h-1.5 rounded-full shrink-0",a.bg.replace("/20","").replace("bg-","bg-")||"bg-slate-500"),style:{backgroundColor:e.color?.startsWith("#")?e.color:void 0}}),t.jsx("span",{"code-path":"src/components/ui/stat-strip.tsx:48:13",className:"text-xs text-[var(--dg-text-muted)]",children:e.label}),t.jsx("span",{"code-path":"src/components/ui/stat-strip.tsx:49:13",className:s("text-sm font-semibold",a.text),children:e.value})]},r)})})}export{d as S};