Exercise: update only the chosen card

The kitchen demo checked an optional missing badge before writing to it and searched inside the soup card for its .status. Here the target is the bike clinic card, but the script should remain safe even if an optional card is absent. The first .status in the document belongs to the book exchange, so a global .status query would update the wrong message.

For a different venue, a plant swap could guard a missing note and scope a label like this:

const plants = document.querySelector("#plants");
if (plants) {
  const note = plants.querySelector(".note");
  if (note) {
    note.textContent = "Cuttings welcome";
  }
}

Use that two-level guard pattern with #bike-clinic and its .status, setting its text to Mechanics ready. Complete the supplied updateOptionalAlert() function: look for .optional-alert and guard it before setting its text. The starter calls the function on load, when the alert is absent; Submit also inserts a temporary alert to check its behavior. Run and check that the book exchange remains Tables being set up.