Implement full multi-company architecture:
- Per-company directory structure (data/companies/{id}/)
- Automatic migration from single-tenant to multi-tenant
- Company management admin tab (create, edit, delete companies)
- Per-company IMAP mailbox configuration (multiple mailboxes per company)
- User access control per company (companies array on users)
- Company switcher in header (shown when user has access to >1 company)
- Session-based company context with check_auth fallback for old sessions
- Ticket list shows mailbox name instead of sender
- IMAP settings moved from global config to company-specific config
- All data endpoints protected with requireCompany() guard
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- .htaccess: HTTPS enforcement, security headers, block sensitive files
- data/.htaccess: deny all direct access to data directory
- Secure session settings (httponly, secure, strict mode, samesite)
- Rate limiting on login (10 attempts per 15 min per IP)
- Math captcha on login form (server-side validated)
- Password reset via email with token (1 hour expiry)
- Forgot password UI with reset link flow
- Email field added to user management
- Updated .gitignore for reset_tokens.json and login_attempts.json
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>