Function MainNav 

pub fn MainNav(_: MainNavProps) -> Element

Main navigation component with consistent styling and active page underline

Props

For details, see the props struct definition.

• active : ActivePage

  The currently active page

• subtitle : Option<&'staticstr>

  Optional subtitle for the brand (e.g., “Programmer’s Guide”)

• show_nav_links : bool

  Whether to show the full nav links (default true)