- Add comprehensive expandable help section in normal mode with detailed instructions
- Include usage recommendations, adjustment tips, and comparison methods
- Add simplified tooltip in fullscreen mode for quick reference
- Improve user guidance for LED strip color calibration process
- Maintain dual-mode functionality (normal/fullscreen) with appropriate help content
- Add LED strip visualization around display previews
- Show real-time color status for each LED pixel
- Support multi-display LED strip configurations
- Use elegant 16px thin LED strip design
- Real-time LED color sync via WebSocket
- Responsive layout with display scaling support
