* feat(web): overhaul SEO structure and landing pages
Add distro-specific install pages and an engine comparison hub to capture high-intent organic queries. Centralize metadata and structured data handling to improve crawl consistency, internal linking, and rich-result eligibility.
* feat(web): add subpage navigation and visual polish
Make SEO landing pages easier to discover and navigate by adding persistent subpage header/footer links to home and key routes. Refresh install and comparison pages with colorful icon-driven sections while expanding homepage footer links for stronger internal linking.
* fix(ci): make web version sync robust to schema location
CI assumed softwareVersion lived in layout.tsx, but SEO refactors moved SoftwareApplication JSON-LD to page.tsx. Update workflow sync steps to patch whichever file currently contains softwareVersion so website build and release jobs keep working.
* chore(web): remove SEO audit artifact
Drop the internal SEO audit markdown from the PR so only production website and workflow changes are included.
