**Auth Callback Improvements:**
- Fix default redirect from /clients to /epd/clients (correct route)
- Add smart detection for password vs magic link users
- Password signup users now go directly to /epd/clients after email confirmation
- Magic link users still get optional /set-password page
**Documentation:**
- Add comprehensive AUTH_FLOW_EXPLAINED.md with step-by-step flow diagrams
- Update RELEASE_AUTH_IMPROVEMENTS.md with magic link migration instructions
- Update emails/README.md with aispeedrun.nl redirect URL configuration
- Document Site URL vs Redirect URLs difference
- Add troubleshooting for common issues (localhost in emails, invalid redirect)
**Key Changes:**
- Email confirmation now correctly redirects password users to EPD
- Clear instructions for Supabase configuration (Site URL + Redirect URLs)
- Both development and production URLs documented for dual environment support
All documentation includes practical examples and FAQ section.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
- Add before-user-created hook function for server-side duplicate email detection
- Implement fallback detection using identities array check (Supabase limitation)
- Update signUpWithPassword to detect duplicate emails via hook errors or empty identities
- Add error handling in login page to show duplicate email errors and auto-switch to login mode
- Add auth hook setup documentation and test scripts
- Add password reset and update password flows
- Add email templates for signup confirmation and password reset
