Security hardening: env-based config, CSRF protection, secure code generation, plus presenter management and email communications system
- Move all credentials from hardcoded to .env with python-dotenv (add .env.example template and .gitignore) - Add CSRF token generation and validation on all state-changing requests - Replace random.choices with secrets.choice for all secure code generation - Add session cookie security headers (HttpOnly, Secure, SameSite) - Add presenter management: assign/remove presenters to breakout sessions, presenter QR scanning - Add email communications system: templates per event, custom email sending, sent email tracking - Add staff/organizer profile pages with staff code display - New DB tables: event_email_templates, sent_emails, user_communications - New DB columns: staff.reminder_count/reminder_dates, breakout_session_organizers.presenter_code - Expand English translation strings across all new features Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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