Navbar overflows instead of wrapping or collapsing

[zainforbjs]

Describe the bug
The navbar currently overflows when the number of navigation items exceeds the available horizontal space.

Items such as Info, Logo, Routes, API, Guides, Tests, Migrator, Package and Plugins extend beyond the visible area instead of wrapping, collapsing, or using a responsive menu.

This makes the navigation difficult to use on smaller screens or when the browser window is reduced.

To Reproduce

1. Start a Wheels application.
2. Observe the navbar.

Expected behavior
The navbar should handle limited space gracefully by doing one of the following:

• Wrapping items to a second line, or
• Collapsing into a responsive/hamburger menu, or
• Using a scrollable navigation container.

Screenshots

Desktop:

• OS: macOS
• Wheels Branch: Develop