- Add robots.txt with admin/API blocking
- Add dynamic sitemap.xml with static pages and genre pages
- Implement full meta tags (Open Graph, Twitter Cards, Canonical, Alternates)
- Add SEO helper functions for domain detection and URL generation
- Add generateMetadata to all pages (homepage, about, genre, special)
- Support automatic domain detection for hoerdle.de and hördle.de
- Add SEO configuration to lib/config.ts
- Replace example imprint data with real contact information
- Add support/donation section with SEPA, PayPal, and Steady options
- Add GEMA tariff tracking requirement note to privacy section
- Remove iframe embedding of Google Sheets, keep link only
- Remove empty lines from imprint section
- Add 'curated' to project description (DE/EN)
- Fix XML tag syntax for Google Sheets link
