- Highlight all cells matching a pressed number when no cell is selected (toggle on repeat)
- ESC key and Ctrl+click deselect the active cell
- Spacebar cycles through a random hue that themes the entire UI via CSS custom property --hue
- Theme hue is persisted in localStorage across page reloads
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
React + Vite sudoku app with 5 difficulty levels, dark mode,
celebration effects, localStorage save, and deploy script.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>