Auth flow landed, brand took shape

Frontend

• Kicked off the Next.js 16 app with Tailwind, strict TS, and CI. Minimal top page is up for Vercel sanity checks.
• Implemented the end-to-end auth flow: login with OAuth providers → /auth/callback code exchange → existing users to dashboard, new users to register (slug validation) then dashboard. Also built the API client foundation (fetch wrapper, env config, token storage). Commit
• Cleaned up env handling: derive all URLs from NEXT_PUBLIC_APP_ENV, replaced env.ts with a lazy Environment.ts singleton (matches the backend pattern), and switched to direnv with .envrc.example.
• Added integration tests with Vitest + Testing Library for all auth pages (19 tests): snapshots, OAuth buttons, error states (e.g. missing code), unauthenticated redirects, and sign-out. Wired the test job into CI. Commit
• Wrote down the i18n strategy: user setting / Accept-Language driven, not URL path based.

Brand & design system

• Spun up the brand repo and laid down design tokens (colors, typography, spacing) with docs/guidelines and a preview page for Vercel.
• Picked Spectral Italic for the wordmark and documented the logo font token; applied it to header/login.
• Chose the ink drop as the favicon/app icon and removed the other exploration assets. Commit
• Fixed the Vercel preview by moving the sample files to repo root so CSS token imports resolve; triggered a redeploy.

Docs and coordination

• Added/updated AGENTS.md with project overview, related repos, and dev instructions in the frontend and LP repos.
• Updated brand README with finalized design decisions.

Overall: got the frontend skeleton in place, shipped a working auth flow with tests, and locked in the initial brand identity. The dashboard is a placeholder for now, but the plumbing is ready.