- Vitest + React Testing Library + jsdom setup - utils.test.ts: cn, formatDate, formatFullDate, getInitials, getRelativeTime, getDaysUntil - api.test.ts: token management, auth, CRUD for clients/events/emails, admin, error handling - auth.test.ts: login, logout, checkSession, setUser - clients.test.ts: fetch, create, update, delete, markContacted, filters - events.test.ts: fetch, create, update, delete, syncAll - emails.test.ts: fetch, generate, update, send, delete
- Click user row to open detail panel instead of inline icons - Panel shows user info, role toggle (User/Admin buttons), password reset, and delete - Cleaner UX: all user management in one place
