Improve SEO indexing and add llms.txt

[ManuelCLopes]

Summary

• improve crawl and index metadata in the landing page and static index.html with competitor-analysis focused title, description, keywords, canonical, OG/Twitter tags, and JSON-LD
• expand robots.txt and sitemap.xml coverage for public routes and include llms.txt
• add client/public/llms.txt and a server fallback route for /llms.txt so it works across static and standalone deployments
• update Vercel rewrite rule to avoid rewriting robots.txt, sitemap.xml, and llms.txt to index.html
• update static-routes tests for new SEO output and GET /llms.txt

Validation

• npm test -- server/tests/static-routes.test.ts client/src/pages/tests/LandingPage.test.tsx ✅
• npm test ❌ (pre-existing unrelated failures in server/tests/businesses-routes.test.ts, server/tests/payments.test.ts, server/tests/reports-routes.test.ts)
• npm run check ❌ (pre-existing missing type/module issue: @vercel/analytics/react)

[vercel]

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Project	Deployment	Actions	Updated (UTC)
radar	Ready	Preview, Comment	Mar 5, 2026 0:45am