feat(ops-web/site-mappings): add site domain mappings management view

Add a CRUD page for site_domain_mappings with search, pagination, create/
edit/enable/disable/delete actions, and register it in the AppShell nav.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/ops-web/src/router/index.ts

@@ -36,6 +36,12 @@ export const router = createRouter({
           component: () => import("@/views/AuditLogsView.vue"),
           meta: { title: "审计日志" },
         },
+        {
+          path: "site-domain-mappings",
+          name: "site-domain-mappings",
+          component: () => import("@/views/SiteDomainMappingsView.vue"),
+          meta: { title: "站点映射" },
+        },
         {
           path: "profile",
           name: "profile",