/** Copy-to-clipboard with a legacy fallback for non-secure contexts. */
export async function copyText(text: string): Promise<boolean> {
  try {
    if (navigator.clipboard && window.isSecureContext !== false) {
      await navigator.clipboard.writeText(text)
      return true
    }
  } catch {
    /* fall through to legacy path */
  }
  try {
    const ta = document.createElement('textarea')
    ta.value = text
    ta.style.position = 'fixed'
    ta.style.opacity = '0'
    document.body.appendChild(ta)
    ta.focus()
    ta.select()
    const ok = document.execCommand('copy')
    ta.remove()
    return ok
  } catch {
    return false
  }
}