Mobile menu category links now resolve correctly

Readers tapping a category from the mobile menu were getting unhelpful 404s because the project context wasn't being passed to the navigation component. Internally that meant the category URL was being assembled without the prefix it needed to land on the right project.

The fix is simple but the impact is real: the mobile menu now threads the project slug through every category link, so they resolve to the right URL on the first tap. Desktop users had been getting the correct links for a while; mobile was the missing piece.

Given how much of blog traffic comes from mobile, this was one of the more invisible bugs holding back the reading experience. If a reader tapped a category from your mobile nav in the past few weeks and bounced, this is why — and it should not happen again starting today.