Fix SEO/UX audit gaps: canonical tags, org schema, nav, header claims

Add canonical URLs and a sitewide Organization JSON-LD (linked via @id
to page-specific LocalBusiness/Service/Article schemas), move FAQ and
Reviews into the top nav, attach the 24/7 support claim to a tooltip
on the header badge instead of leaving it unexplained, drop the
unverifiable incidents_resolved stat from the hero terminal animation,
and clean up the empty-reviews state instead of showing a thin
placeholder.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013otXCiTZsxdZ4SJKZ9wUky

public-site/app/otzyvy/page.jsx

@@ -6,6 +6,7 @@ import { serverApi } from '../../lib/serverApi.js';
 export const metadata = {
   title: 'Отзывы клиентов TopSysOps',
   description: 'Отзывы клиентов об IT-аутсорсинге, техподдержке и других услугах TopSysOps. Оставьте свой отзыв.',
+  alternates: { canonical: '/otzyvy' },
 };
 
 export default async function ReviewsPage() {