EnableNotifications subscribes the owner's device with the public VAPID
key and stores it; sw.js receives pushes and opens /defects on click;
`pnpm vapid:keys` mints the key pair.
Nuxt 4 (app/ structure) + TypeScript, ESLint, Vitest + @nuxt/test-utils,
Drizzle + pg, a /api/health route with a DB ping, and a dev docker-compose
(app + Postgres). Verified: pnpm test, lint, and build pass; the built
server answers /api/health.