SEO fixes: robots.txt, canonicals, noindex, og tags, breadcrumbs, similar games, review schema

- robots.txt: proper Disallow rules + sitemap URL
- Layout: robots meta tag, fix canonical syntax, og:site_name, full Twitter Card tags
- Game pages: canonical URLs, og:type website, breadcrumb nav + JSON-LD schema
- Screenshot alt text with game title and index
- VideoGame JSON-LD: review array with rating/author/body
- Similar Games section on game detail (by genre, ordered by rating)
- browse/index: noindex on paginated or multi-filter pages
- search results: noindex + improved title
- User library and lists: noindex
- Unique meta descriptions on browse, top-rated, new-releases pages

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

public/robots.txt

@@ -1,6 +1,18 @@
 User-agent: *
 Allow: /
-Disallow: /profile
+
 Disallow: /dashboard
+Disallow: /profile
+Disallow: /library
+Disallow: /notifications
+Disallow: /activity
+Disallow: /login
+Disallow: /register
+Disallow: /forgot-password
+Disallow: /reset-password
+Disallow: /verify-email
+Disallow: /games/search
+Disallow: /lists
+Disallow: /*?*page=*
 
 Sitemap: https://gamelog.ro/sitemap.xml