- Add shortcut hints below tool descriptions in Figlet and Units pages
- Revert experimental button-based shortcut layout in Units
- Remove redundant shortcut hints from Units footer
- Ensure consistent kbd tag styling across the application
- Add Figlet text converter with font selection and history
- Add Pastel color palette generator and manipulation suite
- Add comprehensive Units converter with category-based logic
- Introduce AppShell with Sidebar and Header for navigation
- Modernize theme system with CSS variables and new animations
- Update project configuration and dependencies
