Function Button

Button(label: string, props: ButtonProps): ContainerNode
Clickable button with a styled text label.

A convenience wrapper around an HStack with onClick containing a styled Text node. Focusable by default — reachable via Tab and activated with Enter.

Style props are set on the container, not the text — this means bgColor fills the button rect and focusStyle can override any style when focused.
Parameters
- label: string
  Button text.
- props: ButtonProps
  Click handler, styling, and focus configuration.
Returns ContainerNode
A clickable container node.
Example
```
// Basic styled button
Button("[Send]", { onClick: handleSend, bold: true, fgColor: "color06" })
```
Example
```
// Button with focus style (keyboard navigation)
Button("[OK]", {
  onClick: handleOk,
  bgColor: "color08",
  focusStyle: { bgColor: "color02", fgColor: "color00" },
})
```
Example
```
// Mouse-only button (not in Tab order)
Button("✕", { onClick: handleClose, focusable: false })
```
- Defined in components/src/button.ts:76