- Grouped all Admin links into a 'Management' dropdown menu on desktop to prevent navbar overflow.
- Added a 'Management' section header to the mobile menu for better organization.
- Ensured the 'Management' dropdown trigger visually matches other nav links and indicates active state.
- Add 'Skip to main content' links to App and Guest layouts.
- Add aria-current to navigation links for active page indication.
- Add aria-label to mobile menu button.
- Include pending UI updates for Dashboard and Welcome pages with improved structure.
