document.getElementById("verify-form").addEventListener("submit", async (e) => {
  e.preventDefault();
  const btn = e.target.querySelector("button");
  btn.disabled = true;
  btn.textContent = "Submitting...";
  document.getElementById("status").textContent = "";
  document.getElementById("result").innerHTML = "";

  const fd = new FormData(e.target);
  try {
    const r = await fetch("/verify", { method: "POST", body: fd });
    const d = await r.json();
    if (r.ok) {
      document.getElementById("status").textContent = "Task " + d.task_id + " queued";
      document.getElementById("result").innerHTML =
        '<p><a href="/result/' + d.task_id + '">View result →</a></p>';
    } else {
      document.getElementById("status").textContent = "Error: " + (d.detail || "unknown");
    }
  } catch (err) {
    document.getElementById("status").textContent = "Upload failed: " + err.message;
  }
  btn.disabled = false;
  btn.textContent = "Verify";
});