Add a fun easter egg where the dice in the worksheet action menu can be
dragged and thrown. The dice:
- Tracks pointer movement and calculates throw velocity
- Uses physics simulation with gravity pulling back to origin
- Rolls continuously based on movement direction and speed
- Uses direct DOM manipulation for smooth 60fps animation
- Triggers shuffle when thrown and returns home
Also includes worksheet improvements:
- Conditional name field display (hide when empty/default)
- Date positioned top-right next to QR code
- Reduced problem number size
- Tightened header-to-grid spacing
- Problem numbers aligned to cell corners
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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