(function () {
  'use strict';

  var API = '/Admin/api/';
  /** ผ่าน PHP Admin เพื่อให้ PUT ถึง Node แม้ nginx ไม่ proxy /Game/api/ ไปยัง Node */
  var GAME_QUIZ_API = '/Admin/api/game-quiz-settings.php';
  var GAME_TIMING_API = '/Game/api/game-timing';
  var GAME_GAUNTLET_ASSETS_API = '/Game/api/gauntlet-assets';
  var stackGameSaveInFlight = false;
  /** โหมดแทนที่รูป: ชื่อไฟล์เป้าหมายก่อนเปิด file picker */
  var gauntletReplaceTarget = null;
  var cred = { credentials: 'include' };

  function el(id) { return document.getElementById(id); }

  function api(path, opts) {
    opts = opts || {};
    opts.credentials = 'include';
    if (!opts.headers) opts.headers = {};
    if (opts.body && typeof opts.body === 'object' && !(opts.body instanceof FormData)) {
      opts.headers['Content-Type'] = 'application/json';
      opts.body = JSON.stringify(opts.body);
    }
    return fetch(API + path, opts).then(function (r) {
      return r.text().then(function (text) {
        var j = {};
        try {
          j = text ? JSON.parse(text) : {};
        } catch (e) {
          if (!r.ok) throw new Error(text || r.statusText);
          throw e;
        }
        if (!r.ok) throw new Error(j.error || r.statusText || 'Request failed');
        return j;
      });
    });
  }

  function setMsg(id, text, cls) {
    var n = el(id);
    if (!n) return;
    n.textContent = text || '';
    n.className = 'msg' + (cls ? ' ' + cls : '');
  }

  function gameQuizFetch(method, body) {
    var m = method || 'GET';
    var url = GAME_QUIZ_API;
    if (m === 'GET' && body == null) {
      url += (GAME_QUIZ_API.indexOf('?') >= 0 ? '&' : '?') + '_=' + Date.now();
    }
    var opts = { method: m, credentials: 'include', cache: 'no-store' };
    if (body != null) {
      opts.headers = { 'Content-Type': 'application/json' };
      opts.body = JSON.stringify(body);
    }
    return fetch(url, opts).then(function (r) {
      return r.text().then(function (text) {
        var j = {};
        try {
          j = text ? JSON.parse(text) : {};
        } catch (e) {
          if (!r.ok) {
            throw new Error((text || '').slice(0, 280) || r.statusText || 'Request failed');
          }
          throw new Error('คำตอบไม่ใช่ JSON (HTTP ' + r.status + ') — ตรวจ nginx / PHP proxy');
        }
        if (!r.ok) {
          throw new Error(j.error || ('HTTP ' + r.status + ' ' + r.statusText));
        }
        return j;
      });
    });
  }

  function gameTimingFetch(method, body) {
    var m = method || 'GET';
    var url = GAME_TIMING_API;
    if (m === 'GET' && body == null) {
      url += (GAME_TIMING_API.indexOf('?') >= 0 ? '&' : '?') + '_=' + Date.now();
    }
    var opts = { method: m, credentials: 'include', cache: 'no-store' };
    if (body != null) {
      opts.headers = { 'Content-Type': 'application/json' };
      opts.body = JSON.stringify(body);
    }
    return fetch(url, opts).then(function (r) {
      return r.text().then(function (text) {
        var j = {};
        try {
          j = text ? JSON.parse(text) : {};
        } catch (e) {
          if (!r.ok) {
            var plain = (text || r.statusText || 'Request failed').trim();
            if (r.status === 404) {
              plain += ' — รีสตาร์ท Node ที่รัน Game/server.js (pm2 / systemd) หลัง deploy · Restart Game Node after deploy';
            }
            throw new Error(plain);
          }
          throw e;
        }
        if (!r.ok) {
          var base = j.error || r.statusText || 'Request failed';
          if (r.status === 404) {
            base += ' — รีสตาร์ท Node ที่รัน Game/server.js (pm2 / systemd) หลัง deploy · Restart Game Node after deploy';
          }
          throw new Error(base);
        }
        return j;
      });
    });
  }

  function addQuizAdminRow(text, answerTrue) {
    var list = el('quiz-admin-questions-list');
    if (!list) return;
    var row = document.createElement('div');
    row.className = 'quiz-admin-q-row';

    var lab1 = document.createElement('label');
    lab1.className = 'quiz-admin-q-label';
    lab1.appendChild(document.createTextNode('คำถาม '));
    var inp = document.createElement('input');
    inp.type = 'text';
    inp.className = 'quiz-admin-q-text';
    inp.placeholder = 'พิมพ์คำถาม...';
    inp.maxLength = 500;
    inp.value = text || '';
    lab1.appendChild(inp);

    var lab2 = document.createElement('label');
    lab2.className = 'quiz-admin-ans-label';
    lab2.appendChild(document.createTextNode('คำตอบถูก '));
    var sel = document.createElement('select');
    sel.className = 'quiz-admin-q-ans';
    [['true', 'จริง (ถูก)'], ['false', 'เท็จ (ผิด)']].forEach(function (pair) {
      var o = document.createElement('option');
      o.value = pair[0];
      o.textContent = pair[1];
      var isTrue = answerTrue !== false;
      if (pair[0] === 'true' ? isTrue : !isTrue) o.selected = true;
      sel.appendChild(o);
    });
    lab2.appendChild(sel);

    var rm = document.createElement('button');
    rm.type = 'button';
    rm.className = 'btn btn-danger btn-sm quiz-admin-q-remove';
    rm.setAttribute('aria-label', 'ลบข้อนี้');
    rm.textContent = 'ลบ';
    rm.addEventListener('click', function () {
      row.remove();
      if (!list.querySelector('.quiz-admin-q-row')) addQuizAdminRow('', true);
    });

    row.appendChild(lab1);
    row.appendChild(lab2);
    row.appendChild(rm);
    list.appendChild(row);
  }

  function renderQuizAdminQuestions(arr) {
    var list = el('quiz-admin-questions-list');
    if (!list) return;
    list.innerHTML = '';
    var rows = (arr && arr.length) ? arr : [{ text: '', answerTrue: true }];
    rows.forEach(function (q) {
      addQuizAdminRow(q.text || '', q.answerTrue !== false);
    });
  }

  function loadQuizSettingsPanel() {
    gameQuizFetch('GET').then(function (data) {
      el('quiz-read-sec').value = String(Math.round((data.readMs || 10000) / 1000));
      el('quiz-answer-sec').value = String(Math.round((data.answerMs || 5000) / 1000));
      var bMs = data.betweenMs != null ? data.betweenMs : 3500;
      el('quiz-between-sec').value = String(Math.max(0, Math.round(bMs / 1000)));
      renderQuizAdminQuestions(data.questions);
      setMsg('quiz-settings-msg', '', '');
    }).catch(function (e) {
      setMsg('quiz-settings-msg', e.message || 'โหลดไม่ได้', 'error');
    });
  }

  function saveQuizSettingsPanel() {
    var readS = parseInt(el('quiz-read-sec').value, 10);
    var ansS = parseInt(el('quiz-answer-sec').value, 10);
    var betS = parseInt(el('quiz-between-sec').value, 10);
    if (Number.isNaN(readS) || readS < 1) readS = 10;
    if (Number.isNaN(ansS) || ansS < 1) ansS = 5;
    if (Number.isNaN(betS) || betS < 0) betS = 3;
    readS = Math.min(300, readS);
    ansS = Math.min(300, ansS);
    betS = Math.min(120, betS);

    var questions = [];
    document.querySelectorAll('#quiz-admin-questions-list .quiz-admin-q-row').forEach(function (row) {
      var inp = row.querySelector('.quiz-admin-q-text');
      var sel = row.querySelector('.quiz-admin-q-ans');
      var t = inp && inp.value ? String(inp.value).trim() : '';
      if (!t) return;
      questions.push({ text: t, answerTrue: !!(sel && sel.value === 'true') });
    });

    gameQuizFetch('PUT', {
      readMs: readS * 1000,
      answerMs: ansS * 1000,
      betweenMs: betS * 1000,
      questions: questions,
    }).then(function () {
      setMsg('quiz-settings-msg', 'บันทึกแล้ว', 'ok');
    }).catch(function (e) {
      setMsg('quiz-settings-msg', e.message || 'บันทึกไม่ได้', 'error');
    });
  }

  var QUIZ_CARRY_MAX_SLOTS = 16;

  function rebuildQuizCarryCorrectSelect(row) {
    var sel = row.querySelector('.quiz-carry-correct-sel');
    if (!sel) return;
    var inputs = row.querySelectorAll('.quiz-carry-slot-inp');
    var prev = sel.value;
    sel.innerHTML = '';
    var has = false;
    for (var i = 0; i < inputs.length; i++) {
      var t = inputs[i].value ? String(inputs[i].value).trim() : '';
      if (!t) continue;
      has = true;
      var o = document.createElement('option');
      o.value = String(i);
      var preview = t.length > 48 ? t.slice(0, 45) + '…' : t;
      o.textContent = String(i + 1) + '. ' + preview;
      sel.appendChild(o);
    }
    if (!has) {
      var ox = document.createElement('option');
      ox.value = '';
      ox.textContent = '— กรอกตัวเลือกอย่างน้อย 2 ช่อง —';
      sel.appendChild(ox);
      sel.disabled = true;
      return;
    }
    sel.disabled = false;
    var ok = false;
    for (var j = 0; j < sel.options.length; j++) {
      if (sel.options[j].value === prev) {
        sel.selectedIndex = j;
        ok = true;
        break;
      }
    }
    if (!ok) sel.selectedIndex = 0;
  }

  function bindQuizCarryRowInputs(row) {
    row.querySelectorAll('.quiz-carry-slot-inp').forEach(function (inp) {
      inp.addEventListener('input', function () {
        rebuildQuizCarryCorrectSelect(row);
      });
    });
  }

  function addQuizCarryAdminRow(q) {
    var list = el('quiz-carry-admin-list');
    if (!list) return;
    q = q || {};
    var choices = Array.isArray(q.choices) ? q.choices : [];
    var block = document.createElement('div');
    block.className = 'quiz-carry-admin-block';

    var head = document.createElement('div');
    head.className = 'quiz-carry-admin-block-head';

    var labQ = document.createElement('label');
    labQ.className = 'quiz-carry-q-label';
    labQ.appendChild(document.createTextNode('คำถาม'));
    var inpQ = document.createElement('input');
    inpQ.type = 'text';
    inpQ.className = 'quiz-carry-q-text';
    inpQ.placeholder = 'พิมพ์คำถาม…';
    inpQ.maxLength = 500;
    inpQ.value = q.text ? String(q.text) : '';
    labQ.appendChild(inpQ);

    var rm = document.createElement('button');
    rm.type = 'button';
    rm.className = 'btn btn-danger btn-sm quiz-carry-block-remove';
    rm.setAttribute('aria-label', 'ลบข้อนี้');
    rm.textContent = 'ลบข้อ';
    rm.addEventListener('click', function () {
      block.remove();
      if (!list.querySelector('.quiz-carry-admin-block')) addQuizCarryAdminRow(null);
    });

    head.appendChild(labQ);
    head.appendChild(rm);
    block.appendChild(head);

    var grid = document.createElement('div');
    grid.className = 'quiz-carry-choice-grid';
    for (var s = 0; s < QUIZ_CARRY_MAX_SLOTS; s++) {
      var lab = document.createElement('label');
      lab.className = 'quiz-carry-slot-label';
      lab.appendChild(document.createTextNode('ตัวเลือก ' + (s + 1)));
      var inp = document.createElement('input');
      inp.type = 'text';
      inp.className = 'quiz-carry-slot-inp';
      inp.placeholder = s < 2 ? 'จำเป็น' : 'ไม่บังคับ';
      inp.maxLength = 160;
      inp.value = choices[s] != null ? String(choices[s]) : '';
      lab.appendChild(inp);
      grid.appendChild(lab);
    }
    block.appendChild(grid);

    var cw = document.createElement('div');
    cw.className = 'quiz-carry-correct-wrap';
    var labC = document.createElement('label');
    labC.className = 'quiz-carry-correct-label';
    labC.appendChild(document.createTextNode('ข้อที่ถูกต้อง'));
    var sel = document.createElement('select');
    sel.className = 'quiz-carry-correct-sel';
    sel.setAttribute('aria-label', 'เลือกข้อที่ถูก');
    labC.appendChild(sel);
    cw.appendChild(labC);
    block.appendChild(cw);

    list.appendChild(block);
    bindQuizCarryRowInputs(block);
    rebuildQuizCarryCorrectSelect(block);
    var ci = Number(q.correctIndex);
    if (Number.isFinite(ci) && ci >= 0) {
      var targetSlot = ci;
      var opts = sel.querySelectorAll('option');
      for (var k = 0; k < opts.length; k++) {
        if (opts[k].value === String(targetSlot)) {
          sel.selectedIndex = k;
          break;
        }
      }
    }
  }

  function renderQuizCarryAdminList(arr) {
    var list = el('quiz-carry-admin-list');
    if (!list) return;
    list.innerHTML = '';
    var rows = arr && arr.length ? arr : [null];
    rows.forEach(function (q) {
      addQuizCarryAdminRow(q);
    });
  }

  function loadQuizCarryPanel() {
    gameQuizFetch('GET').then(function (data) {
      renderQuizCarryAdminList(data.carryQuestions || []);
      setMsg('quiz-carry-settings-msg', '', '');
    }).catch(function (e) {
      setMsg('quiz-carry-settings-msg', e.message || 'โหลดไม่ได้', 'error');
    });
  }

  function saveQuizCarryPanel() {
    var list = el('quiz-carry-admin-list');
    if (!list) return;
    var carryQuestions = [];
    list.querySelectorAll('.quiz-carry-admin-block').forEach(function (block) {
      var inpQ = block.querySelector('.quiz-carry-q-text');
      var text = inpQ && inpQ.value ? String(inpQ.value).trim() : '';
      if (!text) return;
      var slots = [];
      block.querySelectorAll('.quiz-carry-slot-inp').forEach(function (inp, idx) {
        var v = inp.value ? String(inp.value).trim() : '';
        if (v) slots.push({ idx: idx, text: v });
      });
      if (slots.length < 2) return;
      var sel = block.querySelector('.quiz-carry-correct-sel');
      var slotStr = sel && !sel.disabled && sel.value !== '' ? sel.value : null;
      if (slotStr == null) return;
      var slotNum = parseInt(slotStr, 10);
      var correctIndex = -1;
      for (var i = 0; i < slots.length; i++) {
        if (slots[i].idx === slotNum) {
          correctIndex = i;
          break;
        }
      }
      if (correctIndex < 0) return;
      carryQuestions.push({
        text: text,
        choices: slots.map(function (s) {
          return s.text;
        }),
        correctIndex: correctIndex,
      });
    });

    gameQuizFetch('PUT', { carryQuestions: carryQuestions }).then(function () {
      setMsg('quiz-carry-settings-msg', 'บันทึกแล้ว', 'ok');
    }).catch(function (e) {
      setMsg('quiz-carry-settings-msg', e.message || 'บันทึกไม่ได้', 'error');
    });
  }

  /** หมวด Quiz Battle — ชื่อไทยให้สอดคล้องธีมการศึกษาไซเบอร์ / หน้า Quiz-Battle */
  var QB_LABELS_ABC = ['A', 'B', 'C'];

  var QUIZ_BATTLE_CATEGORIES = [
    { id: 'cybercrime', labelTh: 'อาชญากรรมออนไลน์', labelEn: 'Cybercrime' },
    { id: 'cyber_law', labelTh: 'กฎหมายไซเบอร์', labelEn: 'Cyber law' },
    { id: 'privacy', labelTh: 'ความเป็นส่วนตัวและข้อมูลส่วนบุคคล', labelEn: 'Privacy & PDPA' },
    { id: 'digital_security', labelTh: 'ความปลอดภัยดิจิทัล', labelEn: 'Digital security' },
    { id: 'social_media', labelTh: 'สื่อสังคมออนไลน์', labelEn: 'Social media' },
    { id: 'ethics', labelTh: 'จริยธรรมดิจิทัล', labelEn: 'Digital ethics' },
    { id: 'ai_data', labelTh: 'AI และข้อมูล', labelEn: 'AI & data' },
  ];

  function qbBattleCategoryLabel(catId) {
    for (var i = 0; i < QUIZ_BATTLE_CATEGORIES.length; i++) {
      if (QUIZ_BATTLE_CATEGORIES[i].id === catId) return QUIZ_BATTLE_CATEGORIES[i].labelTh;
    }
    return 'Quiz Battle';
  }

  function fillQbBattleFilterOptions() {
    var sel = el('qb-battle-filter-cat');
    if (!sel) return;
    var keep = sel.value;
    while (sel.options.length > 1) sel.remove(1);
    QUIZ_BATTLE_CATEGORIES.forEach(function (c) {
      var o = document.createElement('option');
      o.value = c.id;
      o.textContent = c.labelTh;
      sel.appendChild(o);
    });
    if (keep) {
      for (var oi = 0; oi < sel.options.length; oi++) {
        if (sel.options[oi].value === keep) {
          sel.value = keep;
          break;
        }
      }
    }
  }

  function applyQbBattleFilter() {
    var list = el('qb-battle-admin-list');
    var f = el('qb-battle-filter-cat');
    if (!list || !f) return;
    var fv = f.value || '';
    list.querySelectorAll('.qb-battle-block').forEach(function (row) {
      var catInp = row.querySelector('.qb-battle-cat');
      var cat = catInp && catInp.value ? catInp.value : '';
      row.hidden = !!(fv && cat !== fv);
    });
    refreshQbBattlePreview();
  }

  function getFirstVisibleQbBattleBlock() {
    var list = el('qb-battle-admin-list');
    if (!list) return null;
    var rows = list.querySelectorAll('.qb-battle-block');
    for (var i = 0; i < rows.length; i++) {
      if (rows[i].hidden) continue;
      var q = rows[i].querySelector('.qb-battle-q-text');
      var t = q && q.value ? String(q.value).trim() : '';
      if (t) return rows[i];
    }
    for (var j = 0; j < rows.length; j++) {
      if (!rows[j].hidden) return rows[j];
    }
    return null;
  }

  function readQbBattleBlockData(row) {
    if (!row) return null;
    var catSel = row.querySelector('.qb-battle-cat');
    var qInp = row.querySelector('.qb-battle-q-text');
    var a0 = row.querySelector('.qb-battle-a');
    var a1 = row.querySelector('.qb-battle-b');
    var a2 = row.querySelector('.qb-battle-c');
    var radios = row.querySelectorAll('input[type="radio"][name^="qb-correct-"]');
    var ci = 0;
    for (var i = 0; i < radios.length; i++) {
      if (radios[i].checked) {
        ci = parseInt(radios[i].value, 10);
        if (!Number.isFinite(ci)) ci = 0;
        break;
      }
    }
    return {
      categoryId: catSel && catSel.value ? catSel.value : 'cybercrime',
      text: qInp && qInp.value ? String(qInp.value).trim() : '',
      choices: [
        a0 && a0.value ? String(a0.value).trim() : '',
        a1 && a1.value ? String(a1.value).trim() : '',
        a2 && a2.value ? String(a2.value).trim() : '',
      ],
      correctIndex: Math.max(0, Math.min(2, ci)),
    };
  }

  function refreshQbBattlePreview() {
    var hudCat = el('qb-preview-hud-cat');
    var qtext = el('qb-preview-modal-q');
    var c0 = el('qb-preview-c0');
    var c1 = el('qb-preview-c1');
    var c2 = el('qb-preview-c2');
    var qModal = el('qb-cyber-modal-question');
    var sModal = el('qb-cyber-modal-summary');
    var layer = el('qb-modal-layer');
    if (!hudCat || !qtext || !c0 || !c1 || !c2 || !qModal || !sModal) return;

    var modeBtn = document.querySelector('.qb-preview-mode-btn.is-active');
    var mode = modeBtn && modeBtn.getAttribute('data-qb-mode') ? modeBtn.getAttribute('data-qb-mode') : 'question';

    var row = getFirstVisibleQbBattleBlock();
    var d = readQbBattleBlockData(row);
    var defQ = 'การกระทำใดผิดกฎหมายไซเบอร์?';
    var defC = [
      'การเจาะระบบเข้าสู่ข้อมูลส่วนบุคคล',
      'การใช้ WI-FI สาธารณะเพื่อดูข่าว',
      'การอัปเดตซอฟต์แวร์เพื่อความปลอดภัย',
    ];
    hudCat.textContent = d ? qbBattleCategoryLabel(d.categoryId) : qbBattleCategoryLabel('cybercrime');
    qtext.textContent = d && d.text ? d.text : defQ;
    var ch = d ? d.choices : defC;
    for (var s = 0; s < 3; s++) {
      var eln = s === 0 ? c0 : s === 1 ? c1 : c2;
      var txt = ch[s] ? ch[s] : defC[s];
      eln.textContent = QB_LABELS_ABC[s] + ' : ' + txt;
    }

    var choiceEls = document.querySelectorAll('#qb-preview-choices .qb-cyber-choice');
    choiceEls.forEach(function (node) {
      node.classList.remove('qb-cyber-choice--correct', 'qb-cyber-choice--wrong', 'qb-cyber-choice--neutral');
      var mark = node.querySelector('.qb-cyber-choice-mark');
      if (mark) mark.textContent = '';
    });

    if (mode === 'summary') {
      qModal.hidden = true;
      sModal.hidden = false;
      if (layer) layer.classList.add('qb-modal-layer--summary');
    } else {
      qModal.hidden = false;
      sModal.hidden = true;
      if (layer) layer.classList.remove('qb-modal-layer--summary');
      var ci = d ? d.correctIndex : 0;
      if (mode === 'revealed') {
        var wrongPick = (ci + 1) % 3;
        choiceEls.forEach(function (node, idx) {
          var mark = node.querySelector('.qb-cyber-choice-mark');
          if (idx === ci) {
            node.classList.add('qb-cyber-choice--correct');
            if (mark) mark.textContent = '✓';
          } else if (idx === wrongPick) {
            node.classList.add('qb-cyber-choice--wrong');
            if (mark) mark.textContent = '✕';
          } else {
            node.classList.add('qb-cyber-choice--neutral');
          }
        });
      }
    }
  }

  function addQbBattleRow(q) {
    var list = el('qb-battle-admin-list');
    if (!list) return;
    q = q || {};
    var uid = 'r' + Math.random().toString(36).slice(2, 10);
    var block = document.createElement('div');
    block.className = 'qb-battle-block';
    block.setAttribute('data-category', q.categoryId || 'cybercrime');

    var head = document.createElement('div');
    head.className = 'qb-battle-block-head';

    var labCat = document.createElement('label');
    labCat.className = 'qb-battle-cat-label';
    labCat.appendChild(document.createTextNode('หมวด'));
    var selCat = document.createElement('select');
    selCat.className = 'qb-battle-cat';
    QUIZ_BATTLE_CATEGORIES.forEach(function (c) {
      var o = document.createElement('option');
      o.value = c.id;
      o.textContent = c.labelTh;
      if ((q.categoryId || 'cybercrime') === c.id) o.selected = true;
      selCat.appendChild(o);
    });
    selCat.addEventListener('change', function () {
      block.setAttribute('data-category', selCat.value);
      applyQbBattleFilter();
    });
    labCat.appendChild(selCat);

    var rm = document.createElement('button');
    rm.type = 'button';
    rm.className = 'btn btn-danger btn-sm qb-battle-remove';
    rm.textContent = 'ลบข้อ';
    rm.addEventListener('click', function () {
      block.remove();
      if (!list.querySelector('.qb-battle-block')) addQbBattleRow(null);
      applyQbBattleFilter();
    });

    head.appendChild(labCat);
    head.appendChild(rm);
    block.appendChild(head);

    var labQ = document.createElement('label');
    labQ.className = 'qb-battle-q-label';
    labQ.appendChild(document.createTextNode('คำถาม'));
    var inpQ = document.createElement('input');
    inpQ.type = 'text';
    inpQ.className = 'qb-battle-q-text';
    inpQ.maxLength = 500;
    inpQ.placeholder = 'พิมพ์คำถาม…';
    inpQ.value = q.text ? String(q.text) : '';
    labQ.appendChild(inpQ);
    block.appendChild(labQ);

    var choices = Array.isArray(q.choices) ? q.choices : [];
    var grid = document.createElement('div');
    grid.className = 'qb-battle-abc-grid';
    [['A', 'a', 0], ['B', 'b', 1], ['C', 'c', 2]].forEach(function (tri) {
      var lab = document.createElement('label');
      lab.className = 'qb-battle-opt-label';
      lab.appendChild(document.createTextNode('ตัวเลือก ' + tri[0]));
      var inp = document.createElement('input');
      inp.type = 'text';
      inp.className = 'qb-battle-' + tri[1];
      inp.maxLength = 160;
      inp.placeholder = tri[0];
      inp.value = choices[tri[2]] != null ? String(choices[tri[2]]) : '';
      lab.appendChild(inp);
      grid.appendChild(lab);
    });
    block.appendChild(grid);

    var ci = Number(q.correctIndex);
    if (!Number.isFinite(ci)) ci = 0;
    ci = Math.max(0, Math.min(2, Math.floor(ci)));

    var fs = document.createElement('fieldset');
    fs.className = 'qb-battle-correct-fs';
    var leg = document.createElement('legend');
    leg.textContent = 'ข้อที่ถูกต้อง';
    fs.appendChild(leg);
    var rg = document.createElement('div');
    rg.className = 'qb-battle-correct-rg';
    for (var r = 0; r < 3; r++) {
      var labR = document.createElement('label');
      labR.className = 'qb-battle-radio-label';
      var radio = document.createElement('input');
      radio.type = 'radio';
      radio.name = 'qb-correct-' + uid;
      radio.value = String(r);
      if (r === ci) radio.checked = true;
      labR.appendChild(radio);
      labR.appendChild(document.createTextNode(' ' + QB_LABELS_ABC[r]));
      rg.appendChild(labR);
    }
    fs.appendChild(rg);
    block.appendChild(fs);

    function onFieldInput() {
      refreshQbBattlePreview();
    }
    inpQ.addEventListener('input', onFieldInput);
    grid.querySelectorAll('input').forEach(function (inp) {
      inp.addEventListener('input', onFieldInput);
    });
    rg.querySelectorAll('input[type="radio"]').forEach(function (rdo) {
      rdo.addEventListener('change', onFieldInput);
    });

    list.appendChild(block);
    applyQbBattleFilter();
  }

  function renderQbBattleList(arr, clearMsg) {
    var list = el('qb-battle-admin-list');
    if (!list) return;
    list.innerHTML = '';
    fillQbBattleFilterOptions();
    var rows = arr && arr.length ? arr : [null];
    rows.forEach(function (q) {
      addQbBattleRow(q);
    });
    if (clearMsg !== false) setMsg('qb-battle-settings-msg', '', '');
  }

  function loadQbBattlePanel(keepSavedMsg) {
    gameQuizFetch('GET').then(function (data) {
      renderQbBattleList(data.battleQuizMcq || [], !keepSavedMsg);
      refreshQbBattlePreview();
    }).catch(function (e) {
      setMsg('qb-battle-settings-msg', e.message || 'โหลดไม่ได้', 'error');
    });
  }

  function classifyQbBattleRow(block) {
    var d = readQbBattleBlockData(block);
    if (!d) return { kind: 'empty', d: null };
    var hasQ = !!d.text;
    var filled = 0;
    for (var i = 0; i < d.choices.length; i++) {
      if (d.choices[i]) filled++;
    }
    if (!hasQ && filled === 0) return { kind: 'empty', d: d };
    if (hasQ && filled === 3) return { kind: 'ok', d: d };
    return { kind: 'partial', d: d };
  }

  function saveQbBattlePanel() {
    var list = el('qb-battle-admin-list');
    if (!list) return;
    var battleQuizMcq = [];
    var partialLines = [];
    var blocks = list.querySelectorAll('.qb-battle-block');
    for (var bi = 0; bi < blocks.length; bi++) {
      var block = blocks[bi];
      var st = classifyQbBattleRow(block);
      if (st.kind === 'empty') continue;
      if (st.kind === 'partial') {
        partialLines.push('แถวที่ ' + (bi + 1) + ': ต้องกรอกคำถามและตัวเลือก A, B, C ให้ครบทุกช่อง');
        continue;
      }
      battleQuizMcq.push({
        categoryId: st.d.categoryId,
        text: st.d.text,
        choices: st.d.choices,
        correctIndex: st.d.correctIndex,
      });
    }
    if (partialLines.length) {
      setMsg(
        'qb-battle-settings-msg',
        'ยังบันทึกไม่ได้ — ' + partialLines.join(' · ') + ' · (Empty question/options are skipped by the server; fill all fields.)',
        'error'
      );
      return;
    }

    gameQuizFetch('PUT', { battleQuizMcq: battleQuizMcq }).then(function (res) {
      var n = battleQuizMcq.length;
      var savedN = res && typeof res.battleQuizMcqSaved === 'number' ? res.battleQuizMcqSaved : n;
      if (n > 0 && savedN !== n) {
        setMsg(
          'qb-battle-settings-msg',
          'เซิร์ฟเวอร์รับเพียง ' + savedN + ' จาก ' + n + ' ข้อ (ข้อที่ไม่ผ่านกฎถูกตัด) · Server kept ' + savedN + '/' + n + ' — ตรวจหมวด/คำถาม/A B C ให้ครบ · Restart Node (Game/server.js) ถ้ายังผิดปกติ',
          'error'
        );
      } else {
        setMsg(
          'qb-battle-settings-msg',
          n ? ('บันทึกแล้ว ' + n + ' ข้อ (ดิสก์ + Node) · Saved ' + n + ' question(s)') : 'บันทึกแล้ว (0 ข้อ) · Saved empty set',
          'ok'
        );
      }
      return loadQbBattlePanel(true);
    }).catch(function (e) {
      setMsg('qb-battle-settings-msg', e.message || 'บันทึกไม่ได้', 'error');
    });
  }

  function laneUrlsToText(arr) {
    if (!arr || !arr.length) return '';
    return arr.map(function (u) { return String(u || '').trim(); }).filter(Boolean).join('\n');
  }

  function parseLaneUrlsTextarea() {
    var raw = el('game-timing-lane-urls') && el('game-timing-lane-urls').value ? String(el('game-timing-lane-urls').value) : '';
    var lines = raw.split(/[\n\r]+/);
    var out = [];
    for (var i = 0; i < lines.length && out.length < 24; i++) {
      var t = lines[i].trim();
      if (t) out.push(t);
    }
    return out;
  }

  function moveLaneUrl(index, dir) {
    var urls = parseLaneUrlsTextarea();
    var j = index + dir;
    if (j < 0 || j >= urls.length) return;
    var t = urls[index];
    urls[index] = urls[j];
    urls[j] = t;
    var ta = el('game-timing-lane-urls');
    if (ta) ta.value = urls.join('\n');
    renderGameTimingLaneVisuals();
  }

  function renderGameTimingLaneVisuals() {
    var wrap = el('game-timing-lane-visual-list');
    if (!wrap) return;
    wrap.innerHTML = '';
    var urls = parseLaneUrlsTextarea();
    if (!urls.length) {
      var ph = document.createElement('p');
      ph.className = 'muted';
      ph.style.margin = '0';
      ph.textContent = 'ยังไม่มีรูป — กด «Lane» ที่การ์ดในคลัง · No lane images yet';
      wrap.appendChild(ph);
      return;
    }
    urls.forEach(function (u, i) {
      var card = document.createElement('div');
      card.className = 'game-timing-visual-card';
      card.setAttribute('role', 'listitem');
      var img = document.createElement('img');
      img.className = 'game-timing-visual-card-img';
      img.src = u;
      img.alt = '';
      img.referrerPolicy = 'no-referrer';
      img.onerror = function () { img.classList.add('is-broken'); };
      var actions = document.createElement('div');
      actions.className = 'game-timing-visual-card-actions';
      function mkBtn(cls, text, fn) {
        var b = document.createElement('button');
        b.type = 'button';
        b.className = 'btn btn-sm ' + cls;
        b.textContent = text;
        b.addEventListener('click', fn);
        return b;
      }
      actions.appendChild(mkBtn('btn-ghost', 'ดู', function () {
        window.open(u, '_blank', 'noopener,noreferrer');
      }));
      actions.appendChild(mkBtn('btn-ghost', '←', function () {
        moveLaneUrl(i, -1);
      }));
      actions.appendChild(mkBtn('btn-ghost', '→', function () {
        moveLaneUrl(i, 1);
      }));
      actions.appendChild(mkBtn('btn-danger', 'ลบ', function () {
        var next = urls.filter(function (_, j) { return j !== i; });
        var ta = el('game-timing-lane-urls');
        if (ta) ta.value = next.join('\n');
        renderGameTimingLaneVisuals();
        setGauntletUploadMsg('เอาออกจาก Lane แล้ว (ไฟล์ในคลังยังอยู่) · Removed from lane', 'ok');
      }));
      card.appendChild(img);
      card.appendChild(actions);
      wrap.appendChild(card);
    });
  }

  function renderGameTimingLaserVisuals() {
    var slots = [
      { inpId: 'game-timing-laser-top-url', prevId: 'game-timing-laser-top-preview' },
      { inpId: 'game-timing-laser-bottom-url', prevId: 'game-timing-laser-bottom-preview' },
      { inpId: 'game-timing-laser-line-url', prevId: 'game-timing-laser-line-preview' },
    ];
    slots.forEach(function (s) {
      var inp = el(s.inpId);
      var prev = el(s.prevId);
      if (!prev) return;
      prev.innerHTML = '';
      var url = inp && inp.value ? String(inp.value).trim() : '';
      if (!url) {
        var ph = document.createElement('div');
        ph.className = 'game-timing-laser-placeholder';
        ph.textContent = 'ยังไม่ตั้ง · Not set';
        prev.appendChild(ph);
        return;
      }
      var img = document.createElement('img');
      img.className = 'game-timing-laser-preview-img';
      img.src = url;
      img.alt = '';
      img.referrerPolicy = 'no-referrer';
      img.onerror = function () { img.classList.add('is-broken'); };
      prev.appendChild(img);
    });
  }

  function bindGameTimingAssignedVisuals() {
    function wire(which, viewId, clearId) {
      var inpId = 'game-timing-laser-' + which + '-url';
      var vBtn = el(viewId);
      var cBtn = el(clearId);
      if (vBtn) vBtn.addEventListener('click', function () {
        var inp = el(inpId);
        var u = inp && inp.value ? String(inp.value).trim() : '';
        if (!u) return;
        window.open(u, '_blank', 'noopener,noreferrer');
      });
      if (cBtn) cBtn.addEventListener('click', function () {
        var inp = el(inpId);
        if (inp) inp.value = '';
        renderGameTimingLaserVisuals();
        setGauntletUploadMsg('ล้างช่อง Laser แล้ว · Laser slot cleared', 'ok');
      });
    }
    wire('top', 'btn-game-timing-laser-top-view', 'btn-game-timing-laser-top-clear');
    wire('bottom', 'btn-game-timing-laser-bottom-view', 'btn-game-timing-laser-bottom-clear');
    wire('line', 'btn-game-timing-laser-line-view', 'btn-game-timing-laser-line-clear');
  }

  function gauntletAssetsJsonFetch(url, opts) {
    opts = opts || {};
    opts.credentials = 'include';
    return fetch(url, opts).then(function (r) {
      return r.text().then(function (text) {
        var j = {};
        try {
          j = text ? JSON.parse(text) : {};
        } catch (e) {
          if (!r.ok) throw new Error(text || r.statusText);
          throw e;
        }
        if (!r.ok) {
          var plain = j.error || r.statusText || 'Request failed';
          if (r.status === 404) {
            plain += ' — รีสตาร์ท Node ที่รัน Game/server.js หลัง deploy · Restart Game Node';
          }
          throw new Error(plain);
        }
        return j;
      });
    });
  }

  function setGauntletUploadMsg(text, cls) {
    setMsg('gauntlet-asset-upload-msg', text, cls);
  }

  function readFileAsDataURL(file) {
    return new Promise(function (resolve, reject) {
      var fr = new FileReader();
      fr.onload = function () { resolve(fr.result); };
      fr.onerror = function () { reject(new Error('อ่านไฟล์ไม่ได้ · Cannot read file')); };
      fr.readAsDataURL(file);
    });
  }

  function appendLaneUrlUnique(url) {
    var ta = el('game-timing-lane-urls');
    if (!ta || !url) return;
    var lines = parseLaneUrlsTextarea();
    if (lines.indexOf(url) >= 0) {
      setGauntletUploadMsg('มี URL นี้ใน Lane แล้ว · Already in lane list', 'ok');
      return;
    }
    lines.push(url);
    ta.value = lines.join('\n');
    renderGameTimingLaneVisuals();
    setGauntletUploadMsg('เพิ่มใน Lane แล้ว · Added to lane URLs', 'ok');
  }

  function setLaserUrlField(which, url) {
    var ids = { top: 'game-timing-laser-top-url', bottom: 'game-timing-laser-bottom-url', line: 'game-timing-laser-line-url' };
    var inp = el(ids[which]);
    if (!inp) return;
    inp.value = url;
    renderGameTimingLaserVisuals();
    setGauntletUploadMsg('ตั้งค่า Laser แล้ว · Laser field updated', 'ok');
  }

  function uploadGauntletDataUrls(fileArr) {
    var files = [].slice.call(fileArr || []);
    if (!files.length) return Promise.resolve();
    var rf = gauntletReplaceTarget;
    gauntletReplaceTarget = null;
    if (rf) files = files.slice(0, 1);
    setGauntletUploadMsg('กำลังอัปโหลด… · Uploading…', '');
    var idx = 0;
    function step() {
      if (idx >= files.length) {
        setGauntletUploadMsg(rf ? 'แทนที่รูปแล้ว · Image replaced' : ('อัปโหลดแล้ว ' + files.length + ' ไฟล์ · Uploaded'), 'ok');
        return refreshGauntletAssetLibrary();
      }
      var file = files[idx++];
      return readFileAsDataURL(file).then(function (dataUrl) {
        var body = { imageDataUrl: dataUrl };
        if (rf) body.replaceFilename = rf;
        else if (file.name) body.label = String(file.name).replace(/\.[^.]+$/, '').slice(0, 120);
        return gauntletAssetsJsonFetch(GAME_GAUNTLET_ASSETS_API + '/upload', {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify(body),
        });
      }).then(step).catch(function (e) {
        setGauntletUploadMsg(e.message || 'อัปโหลดไม่สำเร็จ · Upload failed', 'error');
        return refreshGauntletAssetLibrary();
      });
    }
    return step();
  }

  function refreshGauntletAssetLibrary() {
    var listEl = el('gauntlet-asset-list');
    if (!listEl) return Promise.resolve();
    return gauntletAssetsJsonFetch(GAME_GAUNTLET_ASSETS_API, { method: 'GET' })
      .then(function (data) {
        listEl.innerHTML = '';
        var items = data.items || [];
        if (!items.length) {
          var empty = document.createElement('p');
          empty.className = 'muted';
          empty.style.margin = '0';
          empty.textContent = 'ยังไม่มีรูปในคลัง — อัปโหลดด้านบน · No assets yet — upload above';
          listEl.appendChild(empty);
          return;
        }
        items.forEach(function (it, ix) {
          var card = document.createElement('article');
          card.className = 'gauntlet-asset-card';

          var img = document.createElement('img');
          img.className = 'gauntlet-asset-card-preview';
          img.src = it.url + '?t=' + (it.mtime || 0);
          img.alt = it.label || '';

          var labelWrap = document.createElement('div');
          labelWrap.className = 'gauntlet-asset-card-label-wrap';
          var labelInp = document.createElement('input');
          labelInp.type = 'text';
          labelInp.maxLength = 120;
          labelInp.value = it.label || '';
          var lid = 'gauntlet-asset-label-' + ix;
          labelInp.id = lid;
          var lab = document.createElement('label');
          lab.htmlFor = lid;
          lab.textContent = 'ชื่อเรียก · Label';
          labelWrap.appendChild(lab);
          labelWrap.appendChild(labelInp);

          var urlP = document.createElement('p');
          urlP.className = 'gauntlet-asset-card-url';
          urlP.textContent = it.url;

          var actions = document.createElement('div');
          actions.className = 'gauntlet-asset-card-actions';

          function mkBtn(cls, text, handler) {
            var b = document.createElement('button');
            b.type = 'button';
            b.className = 'btn ' + cls;
            b.textContent = text;
            b.addEventListener('click', handler);
            return b;
          }

          actions.appendChild(mkBtn('btn-ghost', 'ดูรูป', function () {
            window.open(it.url, '_blank', 'noopener,noreferrer');
          }));
          actions.appendChild(mkBtn('btn-ghost', 'บันทึกชื่อ', function () {
            gauntletAssetsJsonFetch(GAME_GAUNTLET_ASSETS_API, {
              method: 'PATCH',
              headers: { 'Content-Type': 'application/json' },
              body: JSON.stringify({ filename: it.filename, label: labelInp.value }),
            })
              .then(function () {
                setGauntletUploadMsg('บันทึกชื่อแล้ว · Label saved', 'ok');
                return refreshGauntletAssetLibrary();
              })
              .catch(function (e) {
                setGauntletUploadMsg(e.message, 'error');
              });
          }));
          actions.appendChild(mkBtn('btn-ghost', 'แทนที่รูป', function () {
            gauntletReplaceTarget = it.filename;
            var finp = el('gauntlet-asset-file-input');
            if (finp) finp.click();
          }));
          actions.appendChild(mkBtn('btn-ghost', 'Lane', function () {
            appendLaneUrlUnique(it.url);
          }));
          actions.appendChild(mkBtn('btn-ghost', 'Laser บน', function () {
            setLaserUrlField('top', it.url);
          }));
          actions.appendChild(mkBtn('btn-ghost', 'Laser ล่าง', function () {
            setLaserUrlField('bottom', it.url);
          }));
          actions.appendChild(mkBtn('btn-ghost', 'Laser เส้น', function () {
            setLaserUrlField('line', it.url);
          }));
          actions.appendChild(mkBtn('btn-danger', 'ลบ', function () {
            if (!confirm('ลบไฟล์ ' + it.filename + ' จากเซิร์ฟเวอร์? · Delete from server?')) return;
            gauntletAssetsJsonFetch(GAME_GAUNTLET_ASSETS_API + '?file=' + encodeURIComponent(it.filename), { method: 'DELETE' })
              .then(function () {
                setGauntletUploadMsg('ลบแล้ว · Deleted', 'ok');
                return refreshGauntletAssetLibrary();
              })
              .catch(function (e) {
                setGauntletUploadMsg(e.message, 'error');
              });
          }));

          card.appendChild(img);
          card.appendChild(labelWrap);
          card.appendChild(urlP);
          card.appendChild(actions);
          listEl.appendChild(card);
        });
      })
      .catch(function (e) {
        listEl.innerHTML = '';
        var p = document.createElement('p');
        p.className = 'msg error';
        p.textContent = e.message || 'โหลดคลังไม่ได้';
        listEl.appendChild(p);
      });
  }

  function bindGauntletAssetLibrary() {
    var drop = el('gauntlet-asset-drop');
    var finp = el('gauntlet-asset-file-input');
    if (!drop || !finp) return;

    drop.addEventListener('click', function () {
      finp.click();
    });
    drop.addEventListener('keydown', function (e) {
      if (e.key === 'Enter' || e.key === ' ') {
        e.preventDefault();
        finp.click();
      }
    });

    ['dragenter', 'dragover'].forEach(function (ev) {
      drop.addEventListener(ev, function (e) {
        e.preventDefault();
        e.stopPropagation();
        drop.classList.add('is-dragover');
      });
    });
    ['dragleave', 'drop'].forEach(function (ev) {
      drop.addEventListener(ev, function (e) {
        e.preventDefault();
        e.stopPropagation();
        if (ev !== 'drop') drop.classList.remove('is-dragover');
      });
    });
    drop.addEventListener('drop', function (e) {
      drop.classList.remove('is-dragover');
      var files = e.dataTransfer && e.dataTransfer.files;
      if (!files || !files.length) return;
      var arr = [];
      for (var i = 0; i < files.length; i++) arr.push(files[i]);
      uploadGauntletDataUrls(arr);
    });

    finp.addEventListener('change', function () {
      if (!finp.files || !finp.files.length) return;
      var arr = [];
      for (var i = 0; i < finp.files.length; i++) arr.push(finp.files[i]);
      finp.value = '';
      uploadGauntletDataUrls(arr);
    });
  }

  /** ว่าง / อัตโนมัติ / auto → null · ตัวเลข 0.85–3.2 tile */
  function parseStackBlockWidthForSave(raw) {
    var t = String(raw == null ? '' : raw).trim();
    if (!t) return { ok: true, value: null };
    var low = t.toLowerCase();
    if (t === 'อัตโนมัติ' || low === 'auto' || low === 'automatic') return { ok: true, value: null };
    var w = parseFloat(t.replace(',', '.'));
    if (!Number.isFinite(w)) {
      return { ok: false, error: 'กว้างบล็อก: ใส่ตัวเลข 0.85–3.2 หรือปล่อยว่างเพื่ออัตโนมัติ' };
    }
    if (w < 0.85 || w > 3.2) {
      return { ok: false, error: 'กว้างบล็อกต้องอยู่ระหว่าง 0.85–3.2 tile หรือปล่อยว่าง' };
    }
    return { ok: true, value: Math.round(Math.max(0.85, Math.min(3.2, w)) * 100) / 100 };
  }

  /** ช่อง Hz ใช้ type=text — ปล่อยว่าง = 0.55 */
  function parseStackSwingHzForSave(raw) {
    var t = String(raw == null ? '' : raw).trim().replace(',', '.');
    if (!t) return { ok: true, value: 0.55 };
    var h = parseFloat(t);
    if (!Number.isFinite(h)) {
      return { ok: false, error: 'สวิง Hz: ใส่ตัวเลข (เช่น 0.58) หรือปล่อยว่างให้เป็น 0.55' };
    }
    h = Math.max(0.08, Math.min(2.8, h));
    return { ok: true, value: Math.round(h * 100) / 100 };
  }

  /** ซิงก์ช่อง Stack จากข้อมูลเซิร์ฟเวอร์ (ช่องอยู่ใน DOM แม้แท็บอื่นเปิดอยู่ — ต้องไม่ปล่อยให้ค้างค่า default จาก HTML) */
  function applyGameTimingDataToStackInputs(data) {
    if (!data || typeof data !== 'object') return;
    if (el('stack-swing-hz')) {
      var hz = data.stackSwingHz != null && data.stackSwingHz !== '' ? Number(data.stackSwingHz) : NaN;
      if (!Number.isFinite(hz)) hz = 0.55;
      hz = Math.max(0.08, Math.min(2.8, hz));
      el('stack-swing-hz').value = String(Math.round(hz * 100) / 100);
    }
    if (el('stack-block-width-tiles')) {
      var rawW = data.stackBlockWidthTiles;
      var bw = rawW != null && rawW !== '' ? Number(rawW) : NaN;
      el('stack-block-width-tiles').value = Number.isFinite(bw) && bw >= 0.85 ? String(Math.round(bw * 100) / 100) : '';
    }
  }

  function loadStackGamePanel() {
    gameTimingFetch('GET')
      .then(function (data) {
        applyGameTimingDataToStackInputs(data);
        setMsg('stack-game-msg', '', '');
      })
      .catch(function (e) {
        setMsg('stack-game-msg', e.message || 'โหลดไม่ได้', 'error');
      });
  }

  function saveStackGamePanel() {
    if (stackGameSaveInFlight) return;
    var hzParsed = parseStackSwingHzForSave(el('stack-swing-hz') ? el('stack-swing-hz').value : '');
    if (!hzParsed.ok) {
      setMsg('stack-game-msg', hzParsed.error, 'error');
      return;
    }
    var hzIn = hzParsed.value;
    var bwParsed = parseStackBlockWidthForSave(el('stack-block-width-tiles') ? el('stack-block-width-tiles').value : '');
    if (!bwParsed.ok) {
      setMsg('stack-game-msg', bwParsed.error, 'error');
      return;
    }
    var blockW = bwParsed.value;
    var btn = el('btn-stack-game-save');
    stackGameSaveInFlight = true;
    if (btn) {
      btn.disabled = true;
      if (!btn.dataset.prevLabel) btn.dataset.prevLabel = btn.textContent;
      btn.textContent = 'กำลังบันทึก…';
    }
    gameTimingFetch('GET')
      .then(function (data) {
        data.stackSwingHz = hzIn;
        data.stackBlockWidthTiles = blockW;
        return gameTimingFetch('PUT', data);
      })
      .then(function () {
        return gameTimingFetch('GET');
      })
      .then(function (fresh) {
        applyGameTimingDataToStackInputs(fresh);
        var hz = fresh && fresh.stackSwingHz != null ? Number(fresh.stackSwingHz) : hzIn;
        if (!Number.isFinite(hz)) hz = hzIn;
        hz = Math.round(hz * 100) / 100;
        var wLabel = fresh && fresh.stackBlockWidthTiles != null && Number.isFinite(Number(fresh.stackBlockWidthTiles))
          ? String(Math.round(Number(fresh.stackBlockWidthTiles) * 100) / 100) + ' tile'
          : 'อัตโนมัติ (จากแผนที่)';
        setMsg('stack-game-msg', 'บันทึกสำเร็จ — สวิง ' + hz + ' Hz · กว้าง ' + wLabel + ' · โหลดยืนยันจากเซิร์ฟเวอร์แล้ว · ผู้เล่นต้องรีเฟรชหน้าเล่นหรือเข้าห้องใหม่', 'ok');
      })
      .catch(function (e) {
        setMsg('stack-game-msg', (e.message || 'บันทึกไม่ได้') + ' — เช็คว่า Node รัน Game/server.js และ URL /Game/api/game-timing ไม่ 404', 'error');
      })
      .then(function () {
        stackGameSaveInFlight = false;
        if (btn) {
          btn.disabled = false;
          btn.textContent = btn.dataset.prevLabel || 'บันทึก';
        }
      });
  }

  function loadGameTimingPanel() {
    gameTimingFetch('GET')
      .then(function (data) {
        el('game-timing-tick-ms').value = String(data.gauntletTickMs != null ? data.gauntletTickMs : 220);
        el('game-timing-jump-ticks').value = String(data.gauntletJumpTicks != null ? data.gauntletJumpTicks : 16);
        el('game-timing-limit-sec').value = String(data.gauntletTimeLimitSec != null ? data.gauntletTimeLimitSec : 0);
        if (el('game-timing-lane-urls')) el('game-timing-lane-urls').value = laneUrlsToText(data.gauntletLaneImageUrls);
        if (el('game-timing-laser-top-url')) el('game-timing-laser-top-url').value = data.gauntletLaserTopUrl != null ? String(data.gauntletLaserTopUrl) : '';
        if (el('game-timing-laser-bottom-url')) el('game-timing-laser-bottom-url').value = data.gauntletLaserBottomUrl != null ? String(data.gauntletLaserBottomUrl) : '';
        if (el('game-timing-laser-line-url')) el('game-timing-laser-line-url').value = data.gauntletLaserLineUrl != null ? String(data.gauntletLaserLineUrl) : '';
        if (el('game-timing-laser-fill')) el('game-timing-laser-fill').value = data.gauntletLaserFillColor != null ? String(data.gauntletLaserFillColor) : '';
        if (el('game-timing-laser-stroke')) el('game-timing-laser-stroke').value = data.gauntletLaserStrokeColor != null ? String(data.gauntletLaserStrokeColor) : '';
        var lw = data.gauntletLaserLineWidthPx != null ? Number(data.gauntletLaserLineWidthPx) : 2;
        if (el('game-timing-laser-line-width')) el('game-timing-laser-line-width').value = String(Number.isFinite(lw) ? lw : 2);
        renderGameTimingLaneVisuals();
        renderGameTimingLaserVisuals();
        applyGameTimingDataToStackInputs(data);
        setMsg('game-timing-msg', '', '');
        return refreshGauntletAssetLibrary();
      })
      .catch(function (e) {
        setMsg('game-timing-msg', e.message || 'โหลดไม่ได้', 'error');
      });
  }

  function loadJumpSurviveTimingPanel() {
    gameTimingFetch('GET')
      .then(function (data) {
        var inp = el('jump-survive-height-mult');
        if (inp) {
          var jsm = Number(data.jumpSurviveJumpHeightMult);
          inp.value = String(Number.isFinite(jsm) ? Math.round(Math.max(0.5, Math.min(4, jsm)) * 100) / 100 : 1.5);
        }
        setMsg('jump-survive-timing-msg', '', '');
      })
      .catch(function (e) {
        setMsg('jump-survive-timing-msg', e.message || 'โหลดไม่ได้', 'error');
      });
  }

  function saveJumpSurviveTimingPanel() {
    var inp = el('jump-survive-height-mult');
    var jumpSurvMult = inp ? parseFloat(String(inp.value)) : 1.5;
    if (Number.isNaN(jumpSurvMult)) jumpSurvMult = 1.5;
    jumpSurvMult = Math.round(Math.max(0.5, Math.min(4, jumpSurvMult)) * 100) / 100;
    gameTimingFetch('GET')
      .then(function (data) {
        data.jumpSurviveJumpHeightMult = jumpSurvMult;
        return gameTimingFetch('PUT', data);
      })
      .then(function () {
        setMsg('jump-survive-timing-msg', 'บันทึกแล้ว — ผู้เล่นกระโดดให้รอดได้ค่าใหม่เมื่อรีเฟรชหน้าเล่นหรือ sync จากเซิร์ฟเวอร์', 'ok');
      })
      .catch(function (e) {
        setMsg('jump-survive-timing-msg', e.message || 'บันทึกไม่ได้', 'error');
      });
  }

  function saveGameTimingPanel() {
    var tickMs = parseInt(el('game-timing-tick-ms').value, 10);
    var jumpT = parseInt(el('game-timing-jump-ticks').value, 10);
    var limS = parseInt(el('game-timing-limit-sec').value, 10);
    if (Number.isNaN(tickMs)) tickMs = 220;
    if (Number.isNaN(jumpT)) jumpT = 16;
    if (Number.isNaN(limS) || limS < 0) limS = 0;
    tickMs = Math.max(80, Math.min(800, tickMs));
    jumpT = Math.max(4, Math.min(40, jumpT));
    limS = limS <= 0 ? 0 : Math.max(10, Math.min(7200, limS));
    var lwPx = el('game-timing-laser-line-width') ? parseInt(el('game-timing-laser-line-width').value, 10) : 2;
    if (Number.isNaN(lwPx)) lwPx = 2;
    lwPx = Math.max(0, Math.min(24, lwPx));
    /** แท็บเวลาเกม = เฉพาะ Gauntlet — อย่าส่ง stackSwingHz/stackBlockWidthTiles จากฟอร์ม (หลังรีเฟรชช่อง Stack ค้าง 0.55 จาก HTML จะทับค่าที่บันทึกไว้) */
    gameTimingFetch('GET')
      .then(function (data) {
        data.gauntletTickMs = tickMs;
        data.gauntletJumpTicks = jumpT;
        data.gauntletTimeLimitSec = limS;
        data.gauntletLaneImageUrls = parseLaneUrlsTextarea();
        data.gauntletLaserTopUrl = el('game-timing-laser-top-url') ? String(el('game-timing-laser-top-url').value).trim() : '';
        data.gauntletLaserBottomUrl = el('game-timing-laser-bottom-url') ? String(el('game-timing-laser-bottom-url').value).trim() : '';
        data.gauntletLaserLineUrl = el('game-timing-laser-line-url') ? String(el('game-timing-laser-line-url').value).trim() : '';
        data.gauntletLaserFillColor = el('game-timing-laser-fill') ? String(el('game-timing-laser-fill').value).trim() : '';
        data.gauntletLaserStrokeColor = el('game-timing-laser-stroke') ? String(el('game-timing-laser-stroke').value).trim() : '';
        data.gauntletLaserLineWidthPx = lwPx;
        return gameTimingFetch('PUT', data);
      })
      .then(function () {
        setMsg('game-timing-msg', 'บันทึกแล้ว — พรมแดง tick·กระโดด / รูปอุปสรรค์ · กระโดดให้รอดตั้งที่แท็บกระโดดให้รอด · ค่า Stack แก้ที่แท็บ Stack เท่านั้น · จำกัดเวลาใช้กับรอบถัดไปที่โฮสต์เริ่มเกม', 'ok');
      })
      .catch(function (e) {
        setMsg('game-timing-msg', e.message || 'บันทึกไม่ได้', 'error');
      });
  }

  function showPanel(name) {
    ['panel-setup', 'panel-login', 'panel-app'].forEach(function (id) {
      var p = el(id);
      if (p) p.hidden = id !== name;
    });
    el('top-actions').hidden = name !== 'panel-app';
  }

  function setTab(name) {
    document.querySelectorAll('.tab').forEach(function (t) {
      var on = t.getAttribute('data-tab') === name;
      t.classList.toggle('is-active', on);
      t.setAttribute('aria-selected', on ? 'true' : 'false');
    });
    document.querySelectorAll('.tab-panel').forEach(function (p) {
      p.hidden = !p.id || p.id !== 'tab-panel-' + name;
    });
    var embedPanels = [
      { tab: 'map-editor', panel: 'tab-panel-map-editor', fsBtn: 'btn-map-editor-fullscreen' },
      { tab: 'characters', panel: 'tab-panel-characters', fsBtn: 'btn-character-fullscreen' },
    ];
    embedPanels.forEach(function (ep) {
      if (name === ep.tab) return;
      var pnl = el(ep.panel);
      var fsBtn = el(ep.fsBtn);
      if (pnl && pnl.classList.contains('is-fullscreen')) {
        pnl.classList.remove('is-fullscreen');
        if (fsBtn) {
          fsBtn.textContent = 'เต็มจอ';
          fsBtn.setAttribute('aria-pressed', 'false');
        }
      }
    });
    if (name === 'quiz') loadQuizSettingsPanel();
    if (name === 'quiz-carry') loadQuizCarryPanel();
    if (name === 'quiz-battle') loadQbBattlePanel();
    if (name === 'jump-survive') loadJumpSurviveTimingPanel();
    if (name === 'game-timing') loadGameTimingPanel();
    if (name === 'stack-game') loadStackGamePanel();
  }

  function boot() {
    return api('session.php').then(function (s) {
      if (s.needsSetup) {
        showPanel('panel-setup');
        return null;
      }
      if (!s.loggedIn) {
        showPanel('panel-login');
        return null;
      }
      showPanel('panel-app');
      el('admin-user-label').textContent = (s.admin && s.admin.username) || '';
      return s.admin;
    });
  }

  el('form-setup').addEventListener('submit', function (e) {
    e.preventDefault();
    var fd = new FormData(e.target);
    var p1 = fd.get('password');
    var p2 = fd.get('password2');
    if (p1 !== p2) {
      setMsg('setup-msg', 'รหัสผ่านไม่ตรงกัน', 'error');
      return;
    }
    api('setup.php', { method: 'POST', body: { password: p1 } })
      .then(function () {
        setMsg('setup-msg', 'สร้างสำเร็จ — กรุณาล็อกอิน', 'ok');
        showPanel('panel-login');
      })
      .catch(function (err) {
        setMsg('setup-msg', err.message || 'ผิดพลาด', 'error');
      });
  });

  (function bindLoginPasswordToggle() {
    var inp = el('login-password');
    var btn = el('login-password-toggle');
    if (!inp || !btn) return;
    btn.addEventListener('click', function () {
      var show = inp.type === 'password';
      inp.type = show ? 'text' : 'password';
      btn.setAttribute('aria-pressed', show ? 'true' : 'false');
      btn.setAttribute('aria-label', show ? 'ซ่อนรหัสผ่าน' : 'แสดงรหัสผ่าน');
      btn.textContent = show ? 'ซ่อน' : 'แสดง';
    });
  })();

  el('form-login').addEventListener('submit', function (e) {
    e.preventDefault();
    var fd = new FormData(e.target);
    api('login.php', {
      method: 'POST',
      body: {
        username: fd.get('username'),
        password: fd.get('password'),
      },
    })
      .then(function () {
        setMsg('login-msg', '', '');
        return boot();
      })
      .then(function (admin) {
        if (admin) loadAll(admin);
      })
      .catch(function (err) {
        setMsg('login-msg', err.message || 'เข้าไม่ได้', 'error');
      });
  });

  el('btn-logout').addEventListener('click', function () {
    api('logout.php', { method: 'POST' })
      .then(function () {
        location.reload();
      })
      .catch(function () {
        location.reload();
      });
  });

  document.querySelectorAll('.tab').forEach(function (tab) {
    tab.addEventListener('click', function () {
      var name = tab.getAttribute('data-tab');
      if (name === 'change-password' && tab.classList.contains('is-active')) {
        setTab('oauth');
        return;
      }
      setTab(name);
    });
  });

  function bindEmbedPanelFullscreen(btnId, panelId) {
    var btn = el(btnId);
    var panel = el(panelId);
    if (!btn || !panel) return;
    function setFs(on) {
      panel.classList.toggle('is-fullscreen', on);
      btn.textContent = on ? 'ออกจากเต็มจอ' : 'เต็มจอ';
      btn.setAttribute('aria-pressed', on ? 'true' : 'false');
    }
    btn.addEventListener('click', function () {
      setFs(!panel.classList.contains('is-fullscreen'));
    });
    document.addEventListener('keydown', function (e) {
      if (e.code !== 'Escape' || !panel.classList.contains('is-fullscreen')) return;
      setFs(false);
    });
  }
  bindEmbedPanelFullscreen('btn-map-editor-fullscreen', 'tab-panel-map-editor');
  bindEmbedPanelFullscreen('btn-character-fullscreen', 'tab-panel-characters');

  var btnGameTimingSave = el('btn-game-timing-save');
  if (btnGameTimingSave) {
    btnGameTimingSave.addEventListener('click', function () {
      saveGameTimingPanel();
    });
  }
  var btnJumpSurviveSave = el('btn-jump-survive-save');
  if (btnJumpSurviveSave) {
    btnJumpSurviveSave.addEventListener('click', saveJumpSurviveTimingPanel);
  }
  var btnStackGameSave = el('btn-stack-game-save');
  if (btnStackGameSave) {
    btnStackGameSave.addEventListener('click', saveStackGamePanel);
  }
  bindGauntletAssetLibrary();
  bindGameTimingAssignedVisuals();

  var btnQuizAdd = el('btn-quiz-admin-add');
  var btnQuizSave = el('btn-quiz-admin-save');
  if (btnQuizAdd) {
    btnQuizAdd.addEventListener('click', function () {
      addQuizAdminRow('', true);
    });
  }
  if (btnQuizSave) btnQuizSave.addEventListener('click', saveQuizSettingsPanel);

  var btnQuizCarryAdd = el('btn-quiz-carry-add');
  var btnQuizCarrySave = el('btn-quiz-carry-save');
  if (btnQuizCarryAdd) {
    btnQuizCarryAdd.addEventListener('click', function () {
      addQuizCarryAdminRow(null);
    });
  }
  if (btnQuizCarrySave) btnQuizCarrySave.addEventListener('click', saveQuizCarryPanel);

  var btnQbBattleAdd = el('btn-qb-battle-add');
  var btnQbBattleSave = el('btn-qb-battle-save');
  if (btnQbBattleAdd) {
    btnQbBattleAdd.addEventListener('click', function () {
      addQbBattleRow(null);
      refreshQbBattlePreview();
    });
  }
  if (btnQbBattleSave) btnQbBattleSave.addEventListener('click', saveQbBattlePanel);

  var qbFilterCat = el('qb-battle-filter-cat');
  if (qbFilterCat) qbFilterCat.addEventListener('change', applyQbBattleFilter);

  document.querySelectorAll('.qb-preview-mode-btn').forEach(function (b) {
    b.addEventListener('click', function () {
      document.querySelectorAll('.qb-preview-mode-btn').forEach(function (x) {
        x.classList.toggle('is-active', x === b);
      });
      refreshQbBattlePreview();
    });
  });

  function loadOAuth() {
    return api('oauth.php').then(function (r) {
      var o = r.oauth || {};
      var f = el('form-oauth');
      ['facebookAppId', 'facebookAppSecret', 'facebookRedirectUri', 'googleClientId', 'googleClientSecret', 'googleRedirectUri'].forEach(function (k) {
        var inp = f.querySelector('[name="' + k + '"]');
        if (inp) inp.value = o[k] || '';
      });
    });
  }

  el('form-oauth').addEventListener('submit', function (e) {
    e.preventDefault();
    var fd = new FormData(e.target);
    var body = {};
    fd.forEach(function (v, k) {
      body[k] = v;
    });
    api('oauth.php', { method: 'PUT', body: body })
      .then(function () {
        setMsg('oauth-msg', 'บันทึกแล้ว', 'ok');
      })
      .catch(function (err) {
        setMsg('oauth-msg', err.message || 'บันทึกไม่สำเร็จ', 'error');
      });
  });

  function renderAccounts(list) {
    var tb = el('table-accounts').querySelector('tbody');
    tb.innerHTML = '';
    var sumCoins = 0;
    (list || []).forEach(function (a) {
      var c = Math.max(0, parseInt(a.coins, 10) || 0);
      sumCoins += c;
      var tr = document.createElement('tr');
      tr.innerHTML =
        '<td>' + escapeHtml(a.displayName || '—') + '</td>' +
        '<td>' + escapeHtml(a.email || '—') + '</td>' +
        '<td>' + escapeHtml(a.loginType || '') + '</td>' +
        '<td><small>' + escapeHtml(a.providerUserId || '—') + '</small></td>' +
        '<td class="td-coins">' +
          '<input type="number" class="input-coins" min="0" step="1" value="' + c + '" data-account-id="' + escapeAttr(a.id) + '" aria-label="COINS">' +
          '<button type="button" class="btn btn-primary btn-coins-save" data-id="' + escapeAttr(a.id) + '">บันทึก COINS</button>' +
        '</td>' +
        '<td>' + (a.blocked ? '<span class="msg error">บล็อก</span>' : 'ปกติ') + '</td>' +
        '<td><button type="button" class="btn btn-danger btn-sm-del" data-id="' + escapeAttr(a.id) + '">ลบ</button> ' +
        '<button type="button" class="btn btn-ghost btn-sm-toggle" data-id="' + escapeAttr(a.id) + '" data-blocked="' + (a.blocked ? '1' : '0') + '">' + (a.blocked ? 'ปลดบล็อก' : 'บล็อก') + '</button></td>';
      tb.appendChild(tr);
    });
    var sumEl = el('accounts-coins-summary');
    if (sumEl) {
      sumEl.textContent = (list && list.length) ? ('ผู้ใช้ ' + list.length + ' บัญชี · รวม COINS ' + sumCoins) : 'ยังไม่มีบัญชี';
    }
    tb.querySelectorAll('.btn-sm-del').forEach(function (b) {
      b.addEventListener('click', function () {
        if (!confirm('ลบบัญชีนี้?')) return;
        api('accounts.php?id=' + encodeURIComponent(b.getAttribute('data-id')), { method: 'DELETE' })
          .then(loadAccounts)
          .catch(function (err) {
            setMsg('accounts-msg', err.message, 'error');
          });
      });
    });
    tb.querySelectorAll('.btn-sm-toggle').forEach(function (b) {
      b.addEventListener('click', function () {
        var id = b.getAttribute('data-id');
        var blocked = b.getAttribute('data-blocked') === '1';
        api('accounts.php', {
          method: 'PATCH',
          body: { id: id, blocked: !blocked },
        })
          .then(loadAccounts)
          .catch(function (err) {
            setMsg('accounts-msg', err.message, 'error');
          });
      });
    });
    tb.querySelectorAll('.btn-coins-save').forEach(function (b) {
      b.addEventListener('click', function () {
        var id = b.getAttribute('data-id');
        var row = b.closest('tr');
        var inp = row ? row.querySelector('input.input-coins') : null;
        var coins = Math.max(0, parseInt(inp && inp.value, 10) || 0);
        api('accounts.php', { method: 'PATCH', body: { id: id, coins: coins } })
          .then(function () {
            setMsg('accounts-msg', 'อัปเดต COINS แล้ว', 'ok');
            return loadAccounts();
          })
          .catch(function (err) {
            setMsg('accounts-msg', err.message, 'error');
          });
      });
    });
  }

  function escapeHtml(s) {
    var d = document.createElement('div');
    d.textContent = s == null ? '' : String(s);
    return d.innerHTML;
  }

  function escapeAttr(s) {
    return String(s || '').replace(/"/g, '&quot;');
  }

  function loadAccounts() {
    return api('accounts.php').then(function (r) {
      renderAccounts(r.accounts);
      setMsg('accounts-msg', '', '');
    });
  }

  el('form-account-add').addEventListener('submit', function (e) {
    e.preventDefault();
    var fd = new FormData(e.target);
    var body = {
      email: fd.get('email'),
      displayName: fd.get('displayName'),
      loginType: fd.get('loginType'),
      providerUserId: fd.get('providerUserId'),
      notes: fd.get('notes'),
      blocked: fd.get('blocked') === 'on',
      coins: Math.max(0, parseInt(fd.get('coins'), 10) || 0),
    };
    api('accounts.php', { method: 'POST', body: body })
      .then(function () {
        e.target.reset();
        return loadAccounts();
      })
      .catch(function (err) {
        setMsg('accounts-msg', err.message, 'error');
      });
  });

  function renderAdmins(list, myId) {
    var tb = el('table-admins').querySelector('tbody');
    tb.innerHTML = '';
    (list || []).forEach(function (a) {
      var tr = document.createElement('tr');
      var delBtn = a.id === myId
        ? '—'
        : '<button type="button" class="btn btn-danger btn-adm-del" data-id="' + escapeAttr(a.id) + '">ลบ</button>';
      tr.innerHTML =
        '<td>' + escapeHtml(a.username) + '</td>' +
        '<td>' + escapeHtml(a.role || 'admin') + '</td>' +
        '<td><small>' + escapeHtml((a.createdAt || '').slice(0, 10)) + '</small></td>' +
        '<td>' + delBtn + '</td>';
      tb.appendChild(tr);
    });
    tb.querySelectorAll('.btn-adm-del').forEach(function (b) {
      b.addEventListener('click', function () {
        if (!confirm('ลบแอดมินนี้?')) return;
        api('admins.php?id=' + encodeURIComponent(b.getAttribute('data-id')), { method: 'DELETE' })
          .then(loadAdmins)
          .catch(function (err) {
            setMsg('admins-msg', err.message, 'error');
          });
      });
    });
  }

  function fillAdminResetSelect(admins, myId) {
    var sel = el('select-admin-reset-target');
    if (!sel) return;
    sel.innerHTML = '<option value="">— เลือก —</option>';
    (admins || []).forEach(function (a) {
      if (!a.id || a.id === myId) return;
      var opt = document.createElement('option');
      opt.value = a.id;
      opt.textContent = a.username + ' (' + (a.role || 'admin') + ')';
      sel.appendChild(opt);
    });
  }

  function loadAdmins() {
    return api('admins.php').then(function (r) {
      return api('session.php').then(function (s) {
        var myId = s.admin && s.admin.id;
        renderAdmins(r.admins, myId);
        fillAdminResetSelect(r.admins, myId);
        setMsg('admins-msg', '', '');
      });
    });
  }

  el('form-change-password').addEventListener('submit', function (e) {
    e.preventDefault();
    var fd = new FormData(e.target);
    var cur = fd.get('currentPassword');
    var n1 = fd.get('newPassword');
    var n2 = fd.get('newPassword2');
    if (n1 !== n2) {
      setMsg('password-self-msg', 'รหัสใหม่ไม่ตรงกัน', 'error');
      return;
    }
    api('password.php', {
      method: 'POST',
      body: { currentPassword: cur, newPassword: n1 },
    })
      .then(function () {
        e.target.reset();
        setMsg('password-self-msg', 'เปลี่ยนรหัสผ่านแล้ว', 'ok');
      })
      .catch(function (err) {
        setMsg('password-self-msg', err.message, 'error');
      });
  });

  el('form-admin-reset-other').addEventListener('submit', function (e) {
    e.preventDefault();
    var fd = new FormData(e.target);
    var tid = fd.get('targetId');
    var n1 = fd.get('newPassword');
    var n2 = fd.get('newPassword2');
    if (!tid) {
      setMsg('admins-msg', 'เลือกแอดมิน', 'error');
      return;
    }
    if (n1 !== n2) {
      setMsg('admins-msg', 'รหัสใหม่ไม่ตรงกัน', 'error');
      return;
    }
    api('admins.php', {
      method: 'PATCH',
      body: { id: tid, newPassword: n1 },
    })
      .then(function () {
        e.target.reset();
        setMsg('admins-msg', 'ตั้งรหัสใหม่ให้แอดมินที่เลือกแล้ว', 'ok');
      })
      .catch(function (err) {
        setMsg('admins-msg', err.message, 'error');
      });
  });

  el('form-admin-add').addEventListener('submit', function (e) {
    e.preventDefault();
    var fd = new FormData(e.target);
    api('admins.php', {
      method: 'POST',
      body: {
        username: fd.get('username'),
        password: fd.get('password'),
        role: fd.get('role'),
      },
    })
      .then(function () {
        e.target.reset();
        return loadAdmins();
      })
      .catch(function (err) {
        setMsg('admins-msg', err.message, 'error');
      });
  });

  function getDesiredAdminTab(admin) {
    var want = null;
    try {
      want = new URL(window.location.href).searchParams.get('tab');
    } catch (e) { /* ignore */ }
    var allowed = { 'change-password': true, oauth: true, 'map-editor': true, quiz: true, 'quiz-carry': true, 'quiz-battle': true, 'jump-survive': true, 'game-timing': true, 'stack-game': true, characters: true, accounts: true, admins: true };
    if (!want || !allowed[want]) return 'oauth';
    if (want === 'admins' && (!admin || admin.role !== 'super')) return 'oauth';
    return want;
  }

  function loadAll(admin) {
    loadOAuth().catch(function (e) {
      setMsg('oauth-msg', e.message, 'error');
    });
    loadAccounts().catch(function (e) {
      setMsg('accounts-msg', e.message, 'error');
    });
    var isSuper = admin && admin.role === 'super';
    el('tab-admins').hidden = !isSuper;
    el('form-admin-add').hidden = !isSuper;
    if (isSuper) {
      loadAdmins().catch(function (e) {
        setMsg('admins-msg', e.message, 'error');
      });
    }
    setTab(getDesiredAdminTab(admin));
    /** อย่า prefetch ซิงก์ Stack ที่นี่ — GET ที่เริ่มก่อน PUT บันทึกอาจกลับช้ากว่าและทับช่องกว้าง/HZ ด้วยข้อมูลเก่า · โหลดจริงที่แท็บ Stack / เวลาเกมแทน */
  }

  boot().then(function (admin) {
    if (admin) loadAll(admin);
  });
})();