- Add MySQL support as alternative to SQLite with full configuration
- Implement database abstraction layer supporting both SQLite and MySQL
- Add database configuration section to admin panel
- Update requirements files with PyMySQL dependency
- Complete multi-process architecture with web, backend, and worker processes
- Add user registration system with email confirmation
- Implement token-based usage system with payment processing
- Add comprehensive documentation and licensing
- Create professional SaaS-style web interface
- Implement REST API for programmatic access
- Add email notification system and payment processors