message: if in system enabled dark theme - on first enter use dark theme
diff: <script>
  const isDark = localStorage.getItem('isDark')
  + const isLight = localStorage.getItem('isLight')
  + const isSystemDark = (window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches)
  const dataset = document.body.dataset
  + if (!isDark && !isLight && isSystemDark) {
  + localStorage.setItem('isDark', 'true')
  + dataset.scheme = "dark"
  + } else {
  if (isDark) {
  dataset.scheme = "dark"
  } else {
  dataset.scheme = "default"
  }
  + }
  // Extension: prevent 2 tabs
  if (window?.chrome?.extension) {
  