Show HN: World Cup 2026 free family and friends prediction platform

A free prediction platform for the 2026 World Cup, built for family and friends with zero setup required. No sign-ups, mobile-friendly, and hosted on free tiers of Vercel and Neon DB. Includes multi-language support (English, German, Spanish, Bulgarian) and automated match result fetching via football-data.org API. Built in under two weeks using Cursor and vibe coding with Opus 4.7.