- Replace Express 4 backend with Express 5 + Mongoose 8 + TypeScript 5.8
- Add MongoDB 8.0 container via docker-compose
- Add JWT auth (jose), argon2 password hashing, zod validation, multer uploads
- Models: BoardMember, Event, GalleryItem, Sponsor, Minute, Member, User
- Full CRUD REST API for all content types
- Seed script to populate MongoDB from hardcoded data
- Wire all frontend components to fetch from API (no JSX changes)
- Add /manage dashboard: login + tabs for Board, Events, Gallery, Sponsors, Minutes, Members
- Uploads volume for persistent file storage across deploys
