- Add share button to formula list with export functionality
- Implement proper escaping of special characters (\n, \t, \", etc.) in FormulaElement.toStringLiteral methods
- Create escapeD4rtString helper function for consistent escaping
- Update Formula, UnitSpec, and VariableSpec toStringLiteral methods to use escaping
- Add share_plus package dependency for sharing functionality
Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>