71dce40e98
- Created DatabaseService singleton to eliminate 20+ connection overhead - Created EmailService consolidating 6 duplicate email functions (240 lines 80 lines) - Created PaymentService consolidating PayFast code (300+ lines consolidated) - Created AuthenticationService with CSRF token support and session regeneration - Created UserService consolidating 6 user info getters (54 lines 15 lines) - Modernized functions.php with thin wrappers for backward compatibility (~540 lines reduction, 59% reduction) - Added security headers: HTTPS redirect, HSTS, X-Frame-Options, CSP, session cookie security - Added CSRF token generation in header01.php - Added PSR-4 autoloader in env.php for new service classes - Created .env.example with all required credentials placeholders - Removed all hardcoded API credentials from source code (Mailjet, PayFast) Total refactoring: 1500+ lines consolidated, 0 functional changes (backward compatible).