/* Filter existing supplier/material options without changing their submitted IDs. */
window.POFilterSelect = {
  bind: function (input, select) {
    if (!input || !select) return;
    const options = Array.from(select.options);
    const normalize = value => String(value || '').trim().toLocaleLowerCase();
    input.addEventListener('input', function () {
      const term = normalize(input.value);
      const matches = options.filter((option, index) => index === 0 ||
        normalize(option.textContent + ' ' + (option.dataset.search || '')).includes(term));
      select.replaceChildren(...matches);
      select.selectedIndex = 0;
      select.setAttribute('aria-label', term ? `匹配 ${matches.length - 1} 项，请选择` : '请选择');
    });
  }
};