async function selectdate() {
    log('selectdate()');
    try {
      const { date } = await chrome.storage.local.get('date');
      const dateBtn = await waitForCondition(() => {
        const buttons = Array.from(document.querySelectorAll('button')).filter(b => b.textContent.trim().match(/^([1-9]|[12][0-9]|3[01])$/));
        let target = buttons.find(b => b.textContent.trim() === date.toString());
        if (target && target.classList.contains('Mui-disabled')) target = buttons.find(b => !b.classList.contains('Mui-disabled'));
        return target;
      }, { timeout: 25000 });
      log('selectdate → click', dateBtn?.textContent.trim());
      nativeClick(dateBtn);
      await new Promise(r => setTimeout(r, 200));
      selectTime();
    } catch (err) {
      log('selectdate → waitForCondition failed:', err?.message || err);
      location.reload();
      return;
    }
  }