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/keysy/page.jsx

@@ -7,6 +7,7 @@ export const metadata = {
   title: 'Кейсы и портфолио — сетевая инфраструктура, ИИ, кибербезопасность',
   description:
     'Реализованные проекты TopSysOps: миграция сетевой инфраструктуры, внедрение ИИ-ассистента, аудит кибербезопасности финтех-проекта.',
+  alternates: { canonical: '/keysy' },
 };
 
 export default async function CasesPage() {