New Features:
- Comprehensive course content management system
- Multi-type content support (Documents, Images, Videos, Articles, Quizzes, Certificates)
- File upload system with 100MB limit and type validation
- Quiz system with multiple question types
- Complete enrollment and subscriber management
- Status tracking (pending, active, completed, cancelled)
- Payment management (pending, paid, failed, refunded)
- Progress tracking (0-100%) with automatic updates
- Course capacity limits and validation
- Certificate issuance tracking
- Enrollment analytics and statistics
Technical Improvements:
- Enhanced file upload system with type validation
- New database models: CourseContent, QuizQuestion
- Comprehensive API endpoints for content and enrollment management
- Role-based access control for all new features
- Enhanced error handling and validation
- File management with automatic cleanup
This version provides a complete foundation for creating rich educational content and managing student enrollments.
