- Add real-time frame time graph with min/avg/max statistics
- Implement draggable overlay functionality with cursor feedback
- Modernize UI with Material Design colors and improved typography
- Fix crash issues by throttling performance data updates
- Ensure FPS and frame time consistency
- Add proper error handling and validation
- Increase overlay size to accommodate new graph feature
Signed-off-by: Zephyron <zephyron@citron-emu.org>