- Implemented SecurityTest to validate token generation, CSRF protection, input sanitization, and rate limiting.
- Created UserModelTest to ensure correct database operations for user management, including creation, updating, banning, and fetching active users.
- Developed ValidationTest to verify input validation and sanitization for user IDs, nicknames, messages, and API requests.
- Introduced Security and Validation utility classes with methods for secure token generation, input sanitization, and comprehensive validation rules.
- Removed unused CSS rules: eliminated redundant height utilities and duplicate responsive rules in utilities.css
- Optimized CSS selectors: confirmed efficient BEM architecture and class-based selectors throughout codebase
- Implemented hardware acceleration: added backface-visibility, perspective, transform:translateZ(0), and will-change properties to animated components (messages, buttons) for GPU acceleration
- Maintained performance: preserved only essential utilities while ensuring browser compatibility
Related to task 5.1.1 in UI_UPDATE.MD: CSS Optimization for UI rendering performance.
