PWA field data collector application

Offline-first Progressive Web App for field data collection across multiple carbon project sites. The app will replace our current KoBoToolbox setup, which cannot handle multi-touchpoint tracking of the same farmer over time (baseline survey, FPIC consent, boundary mapping, implementation, monitoring). Core features Offline-first architecture: field teams collect data in areas with zero connectivity, sync when back online Farmer registry with unique ID, GPS-tagged location, and multi-touchpoint state tracking (5 workflow stages per farmer) Dynamic forms with ~200 fields per survey (bilingual English/Hindi), conditional logic, and validation Camera capture with client-side image compression (target: 300 KB per photo, from ~4 MB raw) GPS point capture with accuracy filtering, and KML/polygon boundary drawing on satellite basemap Role-based access: field surveyor, supervisor, project admin Supervisor dashboard: farmer timeline view, submission status, validation queue Data export to CSV/GeoJSON for downstream MRV processing Technical stack Next.js (App Router) + TypeScript Supabase (PostgreSQL + auth + storage + row-level security) IndexedDB via Dexie.js for offline data Service Worker for offline shell MapLibre GL for satellite basemap and polygon drawing Tailwind CSS + shadcn/ui for interface Deployed on Vercel Deliverables Fully functional PWA hosted on our Vercel account Supabase schema, RLS policies, and migrations Admin dashboard for supervisors Documentation for adding new project methodologies (form templates) Basic user onboarding flow (account creation, form download, sync) Timeline 6–8 weeks from kickoff to production-ready.