Tabs

A row of tabs that switches between panels of content — the facets of a detail view, settings sections, categories. Data-driven: you pass the items (each a key, a label, and the panel content) and salle renders the role=tablist strip and the active role=tabpanel, handling selection, keyboard, and the ARIA wiring:

Tabs(
  items = Seq(
    Tab("overview", "Overview", div(p("The big picture."))),
    Tab("specs", "Specs", div(p("The details."))),
    Tab("legacy", "Legacy", div(p("Old stuff.")), disabled = true),
  ),
)

Items are built with Tab(key, label, content, icon, disabled). Selection is controllable — pass activeKey to own it and react to onChange — or self-managed from defaultActiveKey (defaulting to the first item):

val (active, setActive, _) = useState("overview")

Tabs(
  items = …,
  activeKey = Some(active),
  onChange = setActive,
)

variant picks the look — TabsVariant.Border (an underline under the active tab, the default), Box (each tab a filled box), or Lift (the active tab lifts to meet the panel). size scales the strip, and position (TabsPosition.Top / Bottom) places it above or below its panel.

It follows the WAI-ARIA tabs pattern with automatic activation: only the active tab is in the tab order (roving tabindex), Left/Right move focus to the adjacent enabled tab and activate it (wrapping, skipping disabled), and Home/End jump to the first/last enabled tab. State is mirrored to data-*. The compound (children-as-panels) pattern is out of scope for now.