✅ Hierarchical menu with unlimited nesting levels

✅ Dynamic data loading from database via API

✅ Different background colors for each menu level

✅ Expand All / Collapse All buttons

✅ Click to expand/collapse submenus

✅ Click leaf items to navigate to content

✅ 100% client-side - no server callbacks

✅ Multi-language support with localized titles

✅ Smooth animations and hover effects