Bootstrap Project

1. Read AGENTS.md and architecture docs.
2. Initialize Next.js App Router with TypeScript, Tailwind and src/ layout using pnpm.
3. Pin Next 16.3.3, React/DOM 19.3.0, Node 24; do not force peer conflicts.
4. Create strict tsconfig, env validation, .env.example, formatting/lint/typecheck/test/build scripts.
5. Initialize local Supabase and reconcile packaged migrations with the installed CLI/Postgres version without weakening constraints.
6. Add Vitest, Testing Library and Playwright.
7. Create CI that runs deterministic quality gates.
8. Run install/lint/typecheck/test/build. Fix all failures before completing.