Hack, Reflect, Look Forward: Building JH Link with Google Gemini

This is a submission for the Built with Google Gemini: Writing Challenge What I Built with Google Gemini For the DEV Weekend Challenge: Community , I built JH Link — a Progressive Web App with the tagline "Your youth centre, in your pocket." The app serves my local youth center, which runs activities for members aged 10–19 (and welcomes the wider community). Communication was fragmented: events were word-of-mouth, check-ins were manual, and members had no persistent sense of engagement when they weren't physically present. JH Link solves that with: Activity Feed — filterable, searchable event list with real-time capacity indicators and one-tap registration or waitlist joining Digital Member Card — a QR code (built with qrcode.react ) that encodes <appUrl>/admin/checkin?uid=<userId> , scannable by staff directly in the app Gamification — an XP and badge system: attendance earns points, milestones at 50 / 100 / 250 / 500 / 1000 XP, and four automatic badges (First Timer → Regular → Veter