async function sendRequest(systemPromptModel) {
  // اسم النموذج الحقيقي (fallback ثابت)
  const realV3 = "deepseek-v3";
  const realR1 = "deepseek-r1";
  const realModel = model.includes("speed") ? realV3 : realR1;

  // جلب الصفحة لاستخراج nonces
  let html = "";
  let cookies = "";
  try {
    const res = await fetch(urlMain, { headers: HEAD, method: 'GET', timeout: 10000 });
    html = await res.text();
    // جمع الكوكيز (باسم بسيط)
    const setCookie = res.headers.get('set-cookie');
    cookies = setCookie ? setCookie : "";
  } catch (e) {
    console.log("❌ Failed to reach origin");
    return;
  }

  // استخراج nonces
  const nonceRegex = /['"]nonce['"]\s*[:=]\s*['"]([A-Za-z0-9\-_]{10,})['"]/g;
  const found = [];
  let m;
  while ((m = nonceRegex.exec(html)) !== null) {
    if (m[1] && !/^\d+$/.test(m[1])) found.push(m[1]);
  }
  // إزالة التكرار مع الحفاظ على الترتيب
  const nonces = [...new Set(found)];

  if (!nonces.length) {
    console.log("❌ Failed to get valid response");
    return;
  }

  const convId = `ds_conv_${Date.now()}_xx`;