`nav` Navigation

A navigation link list. Items are comma-separated strings. One item may carry `active`.

Modifiers

Modifier	Effect
`active`	Highlights the item with blue text and a left border accent (applied per item, not to the nav itself)
`vertical`	Stacks items vertically (default in sidebar)
`horizontal`	Arranges items horizontally (default in navbar)

This is a leaf component — it does not accept children.

The `active` modifier goes directly after the item label, before the comma: `nav "Home" active, "About"`.