fix: resolve all build-test and code-check failures

- Fix Go backend mnd (magic number) and revive lint issues in zone stats.
- Remove unused React/Lucide imports and variables in zone overview.
- Add generateStaticParams and Suspense wrapper for websites/[zoneId] page to support Next.js static HTML export.
- Remove next/font/google dependency to allow fully offline frontend compilation.
- Fix hardcoded time dependency in ssl_renew_test.go.
- Fix async_tasks_test.go to respect minimum 90-day retention clamping in database auto-cleanup.
- Add Zone and ZoneDomain models to test database AutoMigrate schemas.
- Update integration tests to use the new zone_domain_ids route binding scheme.

frontend/app/(main)/websites/[zoneId]/page.tsx

@@ -1,6 +1,21 @@
+import {Suspense} from 'react'
+import {Globe} from 'lucide-react'
+import {LoadingStateWithBorder} from '@/components/layout/loading'
 import {ZonePageClient} from './page-client'
 
+export async function generateStaticParams() {
+  return [{zoneId: '1'}];
+}
+
 export default async function ZonePage({params}: PageProps<'/websites/[zoneId]'>) {
   const {zoneId} = await params
-  return <ZonePageClient zoneId={Number(zoneId)} />
+  return (
+    <Suspense fallback={
+      <div className="py-6 px-1">
+        <LoadingStateWithBorder icon={Globe} description="加载 Zone 详情中..." />
+      </div>
+    }>
+      <ZonePageClient zoneId={Number(zoneId)} />
+    </Suspense>
+  )
 }