- Create new SplitButtonComponent with primary action and dropdown menu - Support for three variants: filled, tonal, outlined - Three size options: small, medium, large - Icon support with configurable positioning - Configurable dropdown menu items with icons and labels - Full accessibility support with ARIA attributes and keyboard navigation - Interactive states: hover, active, disabled, loading - Responsive design using semantic design tokens - Complete demo application with multiple examples - Integration with dashboard navigation menu 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>