Function widthByDepth

ui-tui/src/lib/subagentTree.ts:101–119

(tree: readonly SubagentNode[])

 * Drives the inline sparkline (`▁▃▇▅`) and the status-bar HUD.
 */
export function widthByDepth(tree: readonly SubagentNode[]): number[] {
  const widths: number[] = []

  const walk = (nodes: readonly SubagentNode[], depth: number) => {
    if (!nodes.length) {
      return
    }

    widths[depth] = (widths[depth] ?? 0) + nodes.length

    for (const node of nodes) {
      walk(node.children, depth + 1)
    }
  }

  walk(tree, 0)

  return widths
}

/**
 * Flat totals across the full tree — feeds the summary chip header.