Replace verbose error dialog with patronizing list of all failed relations
with a simple, concise message: "No valid mathematical relation" + Close button.
Changes:
- Remove moverPiece and targetPiece props from CaptureErrorDialog
- Remove all explanation generation logic
- Reduce dialog size from 5x4 cells to 3x1.6 cells
- Show single line of text instead of bulleted list
- Keep red styling and smooth animation
Result: Clean, non-patronizing feedback that simply states the fact.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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