feat(web): add zone-based website management

以稳定 Zone ID 替换旧托管域名详情页：列表展示根域与域名计数，详情提供
概览/域名/路由/证书/设置 Tabs，并补齐 ZoneService 与 vitest 行为测试。
Zone 列表 API 返回 domain_count；同步 Swagger 与重构计划进度。

frontend/lib/services/index.ts

@@ -42,6 +42,8 @@ import {
   UptimeKumaService,
   WafService,
   WebsiteService,
+  ZoneDomainService,
+  ZoneService,
 } from './openflare';
 
 const services = {
@@ -67,6 +69,8 @@ const services = {
   openflareDashboard: DashboardService,
   openflareWaf: WafService,
   openflareWebsite: WebsiteService,
+  openflareZone: ZoneService,
+  openflareZoneDomain: ZoneDomainService,
   openflareTls: TlsCertificateService,
   openflareDns: DnsAccountService,
   openflarePages: PagesService,
@@ -201,6 +205,7 @@ export {
 export type {
   NodeItem,
   ProxyRouteItem,
+  ProxyRouteZoneDomain,
   ProxyRouteConfigSection,
   ConfigVersionSummary,
   ConfigVersionDetail,