Contents sub-phases now part of the main phase navigation

Phase navigation is cleaner and simpler with contents sub-phase tabs now integrated directly into the main nav card.

What's New

The phase navigation layout is now streamlined. Instead of having contents sub-phase tabs in a separate card below the main phase nav, they're now integrated directly into the main nav card. This reduces visual clutter and makes the navigation hierarchy clearer while keeping all the same functionality at your fingertips.