Create short “postcards” by placing stars on a canvas, connecting them into a constellation, and attaching a title + a 1–3 sentence message. The app generates a shareable-looking card view (with a random sky gradient, subtle twinkle animation, and optional date/location tag) and lets users save multiple postcards to localStorage, duplicate/edit them, and export as PNG. Components are cleanly separable: starfield canvas editor, connection/label tools, postcard preview, saved gallery, and export/settings panel.

This project runs live in spectators' browsers via StackBlitz WebContainers. Use only WebContainer-compatible dependencies:

• Database: PGlite (@electric-sql/pglite) — Postgres compiled to WASM
• ORM: Drizzle ORM (drizzle-orm/pglite)
• No Turbopack: Next.js MUST use next dev --no-turbopack (set in package.json scripts). Turbopack requires native bindings unavailable in WebContainers.
• No native addons: Avoid sharp, bcrypt, better-sqlite3, prisma, etc.
• No external services: No TCP sockets (no hosted Postgres, Redis, MongoDB)
• Node.js only: No Python, Go, Rust, etc.

If this project uses a database, include a seed.ts file with realistic demo data that runs on every app boot. Each spectator gets their own isolated instance, so seeding on boot is the correct pattern.