(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';
  /** ลำดับอัปโหลดจริงอยู่ที่ quizCarryPlaqueUploadWithFallback — Node ก่อน แล้วค่อย PHP */
  var GAME_QUIZ_CARRY_PLAQUE_UPLOAD_NODE = '/Game/api/quiz-carry-plaque-upload';
  var GAME_QUIZ_CARRY_PLAQUE_UPLOAD_PHP = '/Admin/api/game-quiz-carry-plaque-upload.php';
  /** >0 ระหว่างอัปโหลดรูปป้าย — ห้ามบันทึกก่อนจบไม่งั้น plaqueImageUrl ว่างถูกเขียนลง JSON */
  var quizCarryPlaqueUploadPending = 0;
  /** epoch ms เมื่อเริ่มอัปโหลดล่าสุด — กันสถานะค้างบล็อกบันทึกตลอด */
  var quizCarryPlaqueUploadStartMs = 0;
  var quizCarrySaveInFlight = false;
  /** ซิงก์ range ↔ ตัวเลข carryChoicePlaqueMapScale (wire ครั้งเดียว) */
  var quizCarryPlaqueScaleControlsWired = false;
  /** สำรอง URL หลังอัปโหลดสำเร็จต่อช่อง — กัน race ที่ช่อง text ว่างตอน buildForSave แต่รูปอัปโหลดแล้วจริง */
  var quizCarryPlaquePendingUrlBySlot = {};
  var stackGameSaveInFlight = false;
  var megaVirusSaveInFlight = 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)));
      var rqIn = el('quiz-round-q-count');
      if (rqIn) {
        var rq = data.quizRoundQuestionCount != null ? parseInt(data.quizRoundQuestionCount, 10) : 10;
        if (Number.isNaN(rq) || rq < 1) rq = 10;
        rq = Math.min(50, rq);
        rqIn.value = String(rq);
      }
      renderQuizAdminQuestions(data.questions);
      if (data.quizMapPanelTheme && typeof data.quizMapPanelTheme === 'object') {
        quizTfFillFormFromTheme(data.quizMapPanelTheme);
      } else {
        quizTfFillFormFromTheme({});
      }
      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 roundQEl = el('quiz-round-q-count');
    var roundQ = roundQEl ? parseInt(roundQEl.value, 10) : 10;
    if (Number.isNaN(roundQ) || roundQ < 1) roundQ = 10;
    roundQ = Math.min(50, roundQ);

    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,
      quizRoundQuestionCount: roundQ,
      questions: questions,
      quizMapPanelTheme: quizTfBuildThemeForSave(),
    }).then(function () {
      setMsg('quiz-settings-msg', 'บันทึกแล้ว', 'ok');
    }).catch(function (e) {
      setMsg('quiz-settings-msg', e.message || 'บันทึกไม่ได้', 'error');
    });
  }

  function quizTfThemeHiddenId(kind) {
    if (kind === 'bg') return 'quiz-tf-theme-bg';
    if (kind === 'border') return 'quiz-tf-theme-border';
    return 'quiz-tf-theme-text';
  }

  function quizTfRowPrefix(kind) {
    return 'quiz-tf-theme-' + kind;
  }

  function quizTfSetPickersFromColorString(kind, cssStr) {
    var fb = QUIZ_CARRY_THEME_DEFAULTS[kind];
    var o = quizCarryParseCssColor(cssStr, fb);
    var pref = quizTfRowPrefix(kind);
    var sw = el(pref + '-swatch');
    var ra = el(pref + '-alpha');
    var out = el(pref + '-alpha-out');
    var hi = el(quizTfThemeHiddenId(kind));
    var pr = el(pref + '-preview');
    if (!sw || !ra || !hi) return;
    sw.value = quizCarryHexFromRgb(o.r, o.g, o.b);
    var pct = Math.max(0, Math.min(100, Math.round(Number(o.a) * 100)));
    ra.value = String(pct);
    if (out) out.textContent = pct + '%';
    hi.value = quizCarryRgbToRgbaString(o);
    if (pr) pr.textContent = hi.value;
  }

  function quizTfComposeFromPickers(kind) {
    var pref = quizTfRowPrefix(kind);
    var sw = el(pref + '-swatch');
    var ra = el(pref + '-alpha');
    if (!sw || !ra) return '';
    var pr = quizCarryParseHexToRgb(sw.value);
    if (!pr) return '';
    var pct = parseInt(String(ra.value), 10);
    if (!Number.isFinite(pct)) pct = 100;
    pct = Math.max(0, Math.min(100, pct));
    return quizCarryRgbToRgbaString({ r: pr.r, g: pr.g, b: pr.b, a: pct / 100 });
  }

  function quizTfSyncRowOutput(kind) {
    var s = quizTfComposeFromPickers(kind);
    var hi = el(quizTfThemeHiddenId(kind));
    var pref = quizTfRowPrefix(kind);
    var ra = el(pref + '-alpha');
    var out = el(pref + '-alpha-out');
    var pr = el(pref + '-preview');
    if (hi) hi.value = s;
    if (out && ra) out.textContent = String(Math.max(0, Math.min(100, parseInt(ra.value, 10) || 0))) + '%';
    if (pr && hi) pr.textContent = hi.value;
  }

  function quizTfBindThemePickersOnce() {
    if (quizTfBindThemePickersOnce._done) return;
    ['bg', 'border', 'text'].forEach(function (kind) {
      var pref = quizTfRowPrefix(kind);
      var sw = el(pref + '-swatch');
      var ra = el(pref + '-alpha');
      if (!sw || !ra) return;
      if (ra.getAttribute('data-tf-bound') === '1') return;
      ra.setAttribute('data-tf-bound', '1');
      function sync() {
        quizTfSyncRowOutput(kind);
      }
      sw.addEventListener('input', sync);
      sw.addEventListener('change', sync);
      ra.addEventListener('input', sync);
      ra.addEventListener('change', sync);
    });
    quizTfBindThemePickersOnce._done = true;
  }

  function quizTfBuildThemeForSave() {
    quizTfBindThemePickersOnce();
    ['bg', 'border', 'text'].forEach(function (k) {
      quizTfSyncRowOutput(k);
    });
    var fbBg = QUIZ_CARRY_THEME_DEFAULTS.bg;
    var fbBr = QUIZ_CARRY_THEME_DEFAULTS.border;
    var fbTx = QUIZ_CARRY_THEME_DEFAULTS.text;
    var sBg = quizTfComposeFromPickers('bg');
    var sBr = quizTfComposeFromPickers('border');
    var sTx = quizTfComposeFromPickers('text');
    var bwEl = el('quiz-tf-theme-border-w');
    var bw = bwEl ? parseInt(String(bwEl.value || '2'), 10) : 2;
    if (!Number.isFinite(bw)) bw = 2;
    bw = Math.max(0, Math.min(12, Math.round(bw)));
    var qfMinEl = el('quiz-tf-theme-qfont-min');
    var qfMaxEl = el('quiz-tf-theme-qfont-max');
    var qMin = qfMinEl ? parseInt(String(qfMinEl.value || '10'), 10) : 10;
    var qMax = qfMaxEl ? parseInt(String(qfMaxEl.value || '24'), 10) : 24;
    if (!Number.isFinite(qMin)) qMin = 10;
    if (!Number.isFinite(qMax)) qMax = 24;
    qMin = Math.max(10, Math.min(40, Math.round(qMin)));
    qMax = Math.max(14, Math.min(56, Math.round(qMax)));
    if (qMax < qMin) {
      var swap = qMin;
      qMin = qMax;
      qMax = swap;
    }
    return {
      panelBg: (sBg && sBg.trim()) ? sBg.trim().slice(0, 120) : quizCarryRgbToRgbaString(fbBg),
      panelBorder: (sBr && sBr.trim()) ? sBr.trim().slice(0, 120) : quizCarryRgbToRgbaString(fbBr),
      textColor: (sTx && sTx.trim()) ? sTx.trim().slice(0, 120) : quizCarryRgbToRgbaString(fbTx),
      borderWidthPx: bw,
      questionFontMinPx: qMin,
      questionFontMaxPx: qMax,
    };
  }

  function quizTfFillFormFromTheme(th) {
    quizTfBindThemePickersOnce();
    var t = th && typeof th === 'object' ? th : {};
    quizTfSetPickersFromColorString('bg', t.panelBg);
    quizTfSetPickersFromColorString('border', t.panelBorder);
    quizTfSetPickersFromColorString('text', t.textColor);
    var bwEl = el('quiz-tf-theme-border-w');
    var bw = parseInt(String(t.borderWidthPx), 10);
    if (bwEl) bwEl.value = String(Number.isFinite(bw) && bw >= 0 ? Math.min(12, bw) : 2);
    var qfMinEl = el('quiz-tf-theme-qfont-min');
    var qfMaxEl = el('quiz-tf-theme-qfont-max');
    var qMin = parseInt(String(t.questionFontMinPx), 10);
    var qMax = parseInt(String(t.questionFontMaxPx), 10);
    if (qfMinEl) qfMinEl.value = String(Number.isFinite(qMin) ? Math.max(10, Math.min(40, qMin)) : 10);
    if (qfMaxEl) qfMaxEl.value = String(Number.isFinite(qMax) ? Math.max(14, Math.min(56, qMax)) : 24);
  }

  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 choiceImages = Array.isArray(q.choiceImageUrls) ? q.choiceImageUrls : [];
    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);
      var imgInp = document.createElement('input');
      imgInp.type = 'url';
      imgInp.className = 'quiz-carry-slot-img';
      imgInp.placeholder = 'รูป (URL — ไม่บังคับ)';
      imgInp.maxLength = 512;
      imgInp.autocomplete = 'off';
      imgInp.value = choiceImages[s] != null ? String(choiceImages[s]) : '';
      imgInp.setAttribute('aria-label', 'URL รูปตัวเลือก ' + (s + 1));
      lab.appendChild(imgInp);
      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);
    });
  }

  /** ค่าเริ่มต้น RGBA สำหรับแผงคำถามบนแผนที่ (quiz_carry) */
  var QUIZ_CARRY_THEME_DEFAULTS = {
    bg: { r: 12, g: 14, b: 28, a: 0.88 },
    border: { r: 255, g: 214, b: 102, a: 0.7 },
    text: { r: 241, g: 245, b: 249, a: 1 },
  };

  function quizCarryClampByte(n) {
    return Math.max(0, Math.min(255, Math.round(Number(n)) || 0));
  }

  function quizCarryHexFromRgb(r, g, b) {
    return '#' + [r, g, b].map(function (x) {
      var h = quizCarryClampByte(x).toString(16);
      return h.length === 1 ? '0' + h : h;
    }).join('');
  }

  function quizCarryParseHexToRgb(hex) {
    var h = String(hex || '').trim().replace(/^#/, '');
    if (!h) return null;
    if (h.length === 3) {
      return {
        r: parseInt(h[0] + h[0], 16),
        g: parseInt(h[1] + h[1], 16),
        b: parseInt(h[2] + h[2], 16),
        alpha01: null,
      };
    }
    if (h.length === 6) {
      return {
        r: parseInt(h.slice(0, 2), 16),
        g: parseInt(h.slice(2, 4), 16),
        b: parseInt(h.slice(4, 6), 16),
        alpha01: null,
      };
    }
    if (h.length === 8) {
      return {
        r: parseInt(h.slice(0, 2), 16),
        g: parseInt(h.slice(2, 4), 16),
        b: parseInt(h.slice(4, 6), 16),
        alpha01: parseInt(h.slice(6, 8), 16) / 255,
      };
    }
    return null;
  }

  function quizCarryParseCssColor(str, fallback) {
    var s = String(str == null ? '' : str).trim();
    if (!s) return fallback;
    var m = /^rgba?\(\s*([0-9]+)\s*,\s*([0-9]+)\s*,\s*([0-9]+)\s*(?:,\s*([0-9.]+)\s*)?\)$/i.exec(s);
    if (m) {
      var a = m[4] != null && m[4] !== '' ? parseFloat(m[4]) : 1;
      if (!Number.isFinite(a)) a = 1;
      return {
        r: quizCarryClampByte(parseInt(m[1], 10)),
        g: quizCarryClampByte(parseInt(m[2], 10)),
        b: quizCarryClampByte(parseInt(m[3], 10)),
        a: Math.max(0, Math.min(1, a)),
      };
    }
    if (/^#/.test(s)) {
      var pr = quizCarryParseHexToRgb(s);
      if (!pr) return fallback;
      var a = pr.alpha01 != null ? pr.alpha01 : 1;
      return { r: pr.r, g: pr.g, b: pr.b, a: Math.max(0, Math.min(1, a)) };
    }
    return fallback;
  }

  function quizCarryRgbToRgbaString(o) {
    var a = Math.max(0, Math.min(1, Number(o.a)));
    var t = Math.round(a * 1000) / 1000;
    return 'rgba(' + quizCarryClampByte(o.r) + ', ' + quizCarryClampByte(o.g) + ', ' + quizCarryClampByte(o.b) + ', ' + t + ')';
  }

  function quizCarryRowPrefix(kind) {
    return 'quiz-carry-theme-' + kind;
  }

  function quizCarryThemeHiddenId(kind) {
    if (kind === 'bg') return 'quiz-carry-theme-bg';
    if (kind === 'border') return 'quiz-carry-theme-border';
    return 'quiz-carry-theme-text';
  }

  function quizCarrySetPickersFromColorString(kind, cssStr) {
    var fb = QUIZ_CARRY_THEME_DEFAULTS[kind];
    var o = quizCarryParseCssColor(cssStr, fb);
    var pref = quizCarryRowPrefix(kind);
    var sw = el(pref + '-swatch');
    var ra = el(pref + '-alpha');
    var out = el(pref + '-alpha-out');
    var hi = el(quizCarryThemeHiddenId(kind));
    var pr = el(pref + '-preview');
    if (!sw || !ra || !hi) return;
    sw.value = quizCarryHexFromRgb(o.r, o.g, o.b);
    var pct = Math.max(0, Math.min(100, Math.round(Number(o.a) * 100)));
    ra.value = String(pct);
    if (out) out.textContent = pct + '%';
    hi.value = quizCarryRgbToRgbaString(o);
    if (pr) pr.textContent = hi.value;
  }

  function quizCarryComposeFromPickers(kind) {
    var pref = quizCarryRowPrefix(kind);
    var sw = el(pref + '-swatch');
    var ra = el(pref + '-alpha');
    if (!sw || !ra) return '';
    var pr = quizCarryParseHexToRgb(sw.value);
    if (!pr) return '';
    var pct = parseInt(String(ra.value), 10);
    if (!Number.isFinite(pct)) pct = 100;
    pct = Math.max(0, Math.min(100, pct));
    return quizCarryRgbToRgbaString({ r: pr.r, g: pr.g, b: pr.b, a: pct / 100 });
  }

  function quizCarrySyncRowOutput(kind) {
    var s = quizCarryComposeFromPickers(kind);
    var hi = el(quizCarryThemeHiddenId(kind));
    var pref = quizCarryRowPrefix(kind);
    var ra = el(pref + '-alpha');
    var out = el(pref + '-alpha-out');
    var pr = el(pref + '-preview');
    if (hi) hi.value = s;
    if (out && ra) out.textContent = String(Math.max(0, Math.min(100, parseInt(ra.value, 10) || 0))) + '%';
    if (pr && hi) pr.textContent = hi.value;
  }

  /** อ่านค่าจาก color + range โดยตรง (ไม่พึ่ง hidden ที่อาจว่าง) ก่อน PUT */
  function quizCarryBuildThemeForSave() {
    quizCarryBindThemePickersOnce();
    ['bg', 'border', 'text'].forEach(function (k) {
      quizCarrySyncRowOutput(k);
    });
    var fbBg = QUIZ_CARRY_THEME_DEFAULTS.bg;
    var fbBr = QUIZ_CARRY_THEME_DEFAULTS.border;
    var fbTx = QUIZ_CARRY_THEME_DEFAULTS.text;
    var sBg = quizCarryComposeFromPickers('bg');
    var sBr = quizCarryComposeFromPickers('border');
    var sTx = quizCarryComposeFromPickers('text');
    var bwEl = el('quiz-carry-theme-border-w');
    var bw = bwEl ? parseInt(String(bwEl.value || '2'), 10) : 2;
    if (!Number.isFinite(bw)) bw = 2;
    bw = Math.max(0, Math.min(12, Math.round(bw)));
    var qfMinEl = el('quiz-carry-theme-qfont-min');
    var qfMaxEl = el('quiz-carry-theme-qfont-max');
    var qMin = qfMinEl ? parseInt(String(qfMinEl.value || '10'), 10) : 10;
    var qMax = qfMaxEl ? parseInt(String(qfMaxEl.value || '24'), 10) : 24;
    if (!Number.isFinite(qMin)) qMin = 10;
    if (!Number.isFinite(qMax)) qMax = 24;
    qMin = Math.max(10, Math.min(40, Math.round(qMin)));
    qMax = Math.max(14, Math.min(56, Math.round(qMax)));
    if (qMax < qMin) {
      var swap = qMin;
      qMin = qMax;
      qMax = swap;
    }
    return {
      panelBg: (sBg && sBg.trim()) ? sBg.trim().slice(0, 120) : quizCarryRgbToRgbaString(fbBg),
      panelBorder: (sBr && sBr.trim()) ? sBr.trim().slice(0, 120) : quizCarryRgbToRgbaString(fbBr),
      textColor: (sTx && sTx.trim()) ? sTx.trim().slice(0, 120) : quizCarryRgbToRgbaString(fbTx),
      borderWidthPx: bw,
      questionFontMinPx: qMin,
      questionFontMaxPx: qMax,
    };
  }

  function quizCarryBindThemePickersOnce() {
    if (quizCarryBindThemePickersOnce._done) return;
    ['bg', 'border', 'text'].forEach(function (kind) {
      var pref = quizCarryRowPrefix(kind);
      var sw = el(pref + '-swatch');
      var ra = el(pref + '-alpha');
      if (!sw || !ra) return;
      if (ra.getAttribute('data-bound') === '1') return;
      ra.setAttribute('data-bound', '1');
      function sync() {
        quizCarrySyncRowOutput(kind);
      }
      sw.addEventListener('input', sync);
      sw.addEventListener('change', sync);
      ra.addEventListener('input', sync);
      ra.addEventListener('change', sync);
    });
    quizCarryBindThemePickersOnce._done = true;
  }

  /** ธีมนับ 3-2-1 embed — สีม่าน / กล่อง / ขนาด (carryEmbedCountdownTheme) */
  var QUIZ_CARRY_ECD_COLS = [
    { sw: 'quiz-carry-ecd-overlay-swatch', ra: 'quiz-carry-ecd-overlay-alpha', out: 'quiz-carry-ecd-overlay-alpha-out', hi: 'quiz-carry-ecd-overlay-val', pr: 'quiz-carry-ecd-overlay-preview' },
    { sw: 'quiz-carry-ecd-inner-bg-swatch', ra: 'quiz-carry-ecd-inner-bg-alpha', out: 'quiz-carry-ecd-inner-bg-alpha-out', hi: 'quiz-carry-ecd-inner-bg-val', pr: 'quiz-carry-ecd-inner-bg-preview' },
    { sw: 'quiz-carry-ecd-inner-border-swatch', ra: 'quiz-carry-ecd-inner-border-alpha', out: 'quiz-carry-ecd-inner-border-alpha-out', hi: 'quiz-carry-ecd-inner-border-val', pr: 'quiz-carry-ecd-inner-border-preview' },
  ];
  var QUIZ_CARRY_ECD_DEFAULTS_RGBA = {
    overlay: { r: 8, g: 10, b: 20, a: 0.42 },
    innerBg: { r: 12, g: 14, b: 28, a: 0.82 },
    innerBorder: { r: 122, g: 162, b: 247, a: 0.45 },
  };

  function quizCarryEcdColKey(idx) {
    if (idx === 0) return 'overlay';
    if (idx === 1) return 'innerBg';
    return 'innerBorder';
  }

  function quizCarryEcdSyncRow(idx) {
    var row = QUIZ_CARRY_ECD_COLS[idx];
    var sw = el(row.sw);
    var ra = el(row.ra);
    var hi = el(row.hi);
    var pr = el(row.pr);
    var out = el(row.out);
    if (!sw || !ra || !hi) return;
    var prRgb = quizCarryParseHexToRgb(sw.value);
    if (!prRgb) return;
    var pct = parseInt(String(ra.value), 10);
    if (!Number.isFinite(pct)) pct = 100;
    pct = Math.max(0, Math.min(100, pct));
    var s = quizCarryRgbToRgbaString({ r: prRgb.r, g: prRgb.g, b: prRgb.b, a: pct / 100 });
    hi.value = s;
    if (out) out.textContent = pct + '%';
    if (pr) pr.textContent = s;
  }

  function quizCarryEcdSetRowFromRgba(idx, cssStr) {
    var row = QUIZ_CARRY_ECD_COLS[idx];
    var key = quizCarryEcdColKey(idx);
    var fb = QUIZ_CARRY_ECD_DEFAULTS_RGBA[key];
    var o = quizCarryParseCssColor(cssStr, fb);
    var sw = el(row.sw);
    var ra = el(row.ra);
    var out = el(row.out);
    var hi = el(row.hi);
    var pr = el(row.pr);
    if (!sw || !ra || !hi) return;
    sw.value = quizCarryHexFromRgb(o.r, o.g, o.b);
    var pct = Math.max(0, Math.min(100, Math.round(Number(o.a) * 100)));
    ra.value = String(pct);
    if (out) out.textContent = pct + '%';
    hi.value = quizCarryRgbToRgbaString(o);
    if (pr) pr.textContent = hi.value;
  }

  function quizCarryEcdBindPickersOnce() {
    if (quizCarryEcdBindPickersOnce._done) return;
    for (var i = 0; i < QUIZ_CARRY_ECD_COLS.length; i++) {
      (function (idx) {
        var row = QUIZ_CARRY_ECD_COLS[idx];
        var sw = el(row.sw);
        var ra = el(row.ra);
        if (!sw || !ra) return;
        if (ra.getAttribute('data-ecd-bound') === '1') return;
        ra.setAttribute('data-ecd-bound', '1');
        function sync() {
          quizCarryEcdSyncRow(idx);
        }
        sw.addEventListener('input', sync);
        sw.addEventListener('change', sync);
        ra.addEventListener('input', sync);
        ra.addEventListener('change', sync);
      })(i);
    }
    quizCarryEcdBindPickersOnce._done = true;
  }

  function quizCarryEcdBuildForSave() {
    quizCarryEcdBindPickersOnce();
    for (var i = 0; i < QUIZ_CARRY_ECD_COLS.length; i++) quizCarryEcdSyncRow(i);
    var o0 = el('quiz-carry-ecd-overlay-val');
    var o1 = el('quiz-carry-ecd-inner-bg-val');
    var o2 = el('quiz-carry-ecd-inner-border-val');
    var bwEl = el('quiz-carry-ecd-inner-border-w');
    var radEl = el('quiz-carry-ecd-inner-radius');
    var dig = el('quiz-carry-ecd-digit-swatch');
    var m1 = el('quiz-carry-ecd-map-cqmin');
    var m2 = el('quiz-carry-ecd-map-cqh');
    var m3 = el('quiz-carry-ecd-map-max-px');
    var sv = el('quiz-carry-ecd-screen-vw');
    var sm = el('quiz-carry-ecd-screen-max-px');
    var bw = bwEl ? parseInt(String(bwEl.value || '1'), 10) : 1;
    if (!Number.isFinite(bw)) bw = 1;
    bw = Math.max(0, Math.min(12, Math.round(bw)));
    var rad = radEl ? parseInt(String(radEl.value || '12'), 10) : 12;
    if (!Number.isFinite(rad)) rad = 12;
    rad = Math.max(0, Math.min(32, Math.round(rad)));
    var cqmin = m1 ? parseInt(String(m1.value || '78'), 10) : 78;
    var cqh = m2 ? parseInt(String(m2.value || '82'), 10) : 82;
    var mpx = m3 ? parseInt(String(m3.value || '200'), 10) : 200;
    cqmin = Math.max(35, Math.min(100, cqmin));
    cqh = Math.max(35, Math.min(100, cqh));
    mpx = Math.max(48, Math.min(400, mpx));
    var vw = sv ? parseInt(String(sv.value || '28'), 10) : 28;
    var smx = sm ? parseInt(String(sm.value || '132'), 10) : 132;
    vw = Math.max(6, Math.min(44, vw));
    smx = Math.max(48, Math.min(220, smx));
    var digitHex = dig && /^#[0-9a-fA-F]{6}$/.test(String(dig.value || '').trim()) ? String(dig.value).trim() : '#ffe066';
    return {
      overlayBackdrop: (o0 && o0.value.trim()) ? o0.value.trim().slice(0, 120) : quizCarryRgbToRgbaString(QUIZ_CARRY_ECD_DEFAULTS_RGBA.overlay),
      innerBg: (o1 && o1.value.trim()) ? o1.value.trim().slice(0, 120) : quizCarryRgbToRgbaString(QUIZ_CARRY_ECD_DEFAULTS_RGBA.innerBg),
      innerBorder: (o2 && o2.value.trim()) ? o2.value.trim().slice(0, 120) : quizCarryRgbToRgbaString(QUIZ_CARRY_ECD_DEFAULTS_RGBA.innerBorder),
      innerBorderWpx: bw,
      innerRadiusPx: rad,
      digitColor: digitHex.slice(0, 32),
      mapDigitCqmin: cqmin,
      mapDigitCqh: cqh,
      mapDigitMaxPx: mpx,
      screenDigitVw: vw,
      screenDigitMaxPx: smx,
    };
  }

  function quizCarryEcdFillForm(th) {
    quizCarryEcdBindPickersOnce();
    var t = th && typeof th === 'object' ? th : {};
    quizCarryEcdSetRowFromRgba(0, t.overlayBackdrop);
    quizCarryEcdSetRowFromRgba(1, t.innerBg);
    quizCarryEcdSetRowFromRgba(2, t.innerBorder);
    var bwEl = el('quiz-carry-ecd-inner-border-w');
    var radEl = el('quiz-carry-ecd-inner-radius');
    var dig = el('quiz-carry-ecd-digit-swatch');
    var m1 = el('quiz-carry-ecd-map-cqmin');
    var m2 = el('quiz-carry-ecd-map-cqh');
    var m3 = el('quiz-carry-ecd-map-max-px');
    var sv = el('quiz-carry-ecd-screen-vw');
    var sm = el('quiz-carry-ecd-screen-max-px');
    var bw = parseInt(String(t.innerBorderWpx), 10);
    if (bwEl) bwEl.value = String(Number.isFinite(bw) && bw >= 0 ? Math.min(12, bw) : 1);
    var rad = parseInt(String(t.innerRadiusPx), 10);
    if (radEl) radEl.value = String(Number.isFinite(rad) && rad >= 0 ? Math.min(32, rad) : 12);
    if (dig && typeof t.digitColor === 'string' && /^#[0-9a-fA-F]{6}$/.test(t.digitColor.trim())) dig.value = t.digitColor.trim();
    var cqmin = parseInt(String(t.mapDigitCqmin), 10);
    var cqh = parseInt(String(t.mapDigitCqh), 10);
    var mpx = parseInt(String(t.mapDigitMaxPx), 10);
    if (m1) m1.value = String(Number.isFinite(cqmin) ? Math.max(35, Math.min(100, cqmin)) : 78);
    if (m2) m2.value = String(Number.isFinite(cqh) ? Math.max(35, Math.min(100, cqh)) : 82);
    if (m3) m3.value = String(Number.isFinite(mpx) ? Math.max(48, Math.min(400, mpx)) : 200);
    var vw = parseInt(String(t.screenDigitVw), 10);
    var smx = parseInt(String(t.screenDigitMaxPx), 10);
    if (sv) sv.value = String(Number.isFinite(vw) ? Math.max(6, Math.min(44, vw)) : 28);
    if (sm) sm.value = String(Number.isFinite(smx) ? Math.max(48, Math.min(220, smx)) : 132);
  }

  var QUIZ_CARRY_PLAQUE_SLOT_COUNT = 16;
  var QUIZ_CARRY_PLAQUE_KINDS = ['fixed', 'fill', 'text'];
  var QUIZ_CARRY_PLAQUE_DEFAULTS_RGBA = {
    fixed: { r: 122, g: 200, b: 255, a: 0.9 },
    fill: { r: 12, g: 10, b: 20, a: 0.88 },
    text: { r: 248, g: 249, b: 255, a: 1 },
  };

  function quizCarryPlaqueSlotPrefix(si) {
    return 'quiz-carry-plaque-s' + si + '-';
  }

  /**
   * อัปโหลดป้าย: ลอง POST ตรง Node (/Game/api/ — nginx proxy 20M) ก่อน แล้วค่อย PHP ถ้าล้ม
   * เดิมลอง PHP ก่อนทำให้พังง่ายเมื่อ php-fpm ต่อ 127.0.0.1:3001 ไม่ได้หรือ session ผิด แม้เกมจะรันอยู่
   */
  function quizCarryPlaqueUploadWithFallback(dataUrl) {
    var body = JSON.stringify({ imageDataUrl: dataUrl });
    var opts = { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: body };
    return gauntletAssetsJsonFetch(GAME_QUIZ_CARRY_PLAQUE_UPLOAD_NODE, opts).catch(function (errFirst) {
      var msg = String((errFirst && errFirst.message) || '');
      if (/\b401\b|Unauthorized|หมดเซสชัน/i.test(msg)) {
        return Promise.reject(errFirst);
      }
      var tryPhp =
        /\b404\b|\b405\b|Not Found|ไม่พบ|502|503|504|Bad Gateway|Failed to fetch|NetworkError|Load failed|ECONNREFUSED/i.test(
          msg,
        ) ||
        /\b413\b|Request Entity Too Large|Payload too large|รับ body ไม่ได้|too large/i.test(msg);
      if (!tryPhp) {
        return Promise.reject(errFirst);
      }
      return gauntletAssetsJsonFetch(GAME_QUIZ_CARRY_PLAQUE_UPLOAD_PHP, opts).then(function (res) {
        try {
          setMsg(
            'quiz-carry-settings-msg',
            'อัปโหลดสำเร็จผ่าน PHP (รองจาก /Game/api/) · Upload OK via PHP fallback',
            'ok',
          );
        } catch (e1) { /* ignore */ }
        return res;
      });
    });
  }

  /** URL สำหรับ <img src> — path ที่ขึ้นต้นด้วย / ให้ต่อ origin (รองรับ Admin ใต้โดเมนเดียวกับ /Game/) */
  function quizCarryPlaqueAbsMediaUrl(path) {
    var s = String(path || '').trim();
    if (!s) return '';
    if (/^https?:\/\//i.test(s)) return s;
    if (s.charAt(0) === '/') return String(window.location.origin || '') + s;
    return '';
  }

  function quizCarryPlaqueUpdateImagePreview(si) {
    var pfx = quizCarryPlaqueSlotPrefix(si);
    var inp = el(pfx + 'plaque-image-url');
    var img = el(pfx + 'plaque-preview-img');
    var errEl = el(pfx + 'plaque-preview-err');
    if (!img) return;
    var raw = inp && inp.value ? String(inp.value).trim() : '';
    if (errEl) errEl.textContent = '';
    if (!raw) {
      img.style.display = 'none';
      img.removeAttribute('src');
      return;
    }
    var abs = quizCarryPlaqueAbsMediaUrl(raw);
    if (!abs) {
      img.style.display = 'none';
      if (errEl) errEl.textContent = 'รูปแบบ URL ไม่รองรับ';
      return;
    }
    img.onerror = function () {
      img.style.display = 'none';
      if (errEl) errEl.textContent = 'โหลดตัวอย่างไม่ได้ — ตรวจ path / สิทธิ์ไฟล์ / รีสตาร์ท Node';
    };
    img.onload = function () {
      try {
        img.removeAttribute('width');
        img.removeAttribute('height');
      } catch (e) { /* ignore */ }
      img.style.display = 'block';
      if (errEl) errEl.textContent = '';
    };
    var sep = abs.indexOf('?') >= 0 ? '&' : '?';
    img.src = abs + sep + '_pv=' + Date.now();
  }

  function quizCarryPlaqueUpdateNeonUi(si) {
    var modeEl = el(quizCarryPlaqueSlotPrefix(si) + 'border-mode');
    var grid = modeEl && modeEl.closest ? modeEl.closest('.quiz-carry-theme-grid') : null;
    if (!grid) return;
    if (modeEl && modeEl.value === 'fixed') grid.classList.remove('quiz-carry-plaque-grid--neon');
    else grid.classList.add('quiz-carry-plaque-grid--neon');
    var hint = grid.querySelector('.quiz-carry-plaque-neon-hint');
    if (hint) hint.style.display = modeEl && modeEl.value === 'fixed' ? 'none' : '';
  }

  function quizCarryPlaqueRowIds(si, kind) {
    var seg = kind === 'fixed' ? 'fixed' : kind === 'fill' ? 'fill' : 'text';
    var p = quizCarryPlaqueSlotPrefix(si);
    return {
      sw: p + seg + '-swatch',
      ra: p + seg + '-alpha',
      out: p + seg + '-alpha-out',
      hi: p + seg + '-val',
    };
  }

  function quizCarryPlaqueEnsureMounted() {
    var root = el('quiz-carry-plaque-slots-root');
    if (!root || root.getAttribute('data-mounted') === '1') return;
    for (var si = 0; si < QUIZ_CARRY_PLAQUE_SLOT_COUNT; si++) {
      var det = document.createElement('details');
      det.className = 'quiz-carry-plaque-slot-details';
      if (si === 0) det.open = true;
      var summ = document.createElement('summary');
      summ.textContent = 'ตัวเลือก ' + (si + 1);
      det.appendChild(summ);
      var grid = document.createElement('div');
      grid.className = 'quiz-carry-theme-grid quiz-carry-plaque-grid';
      var rowMode = document.createElement('div');
      rowMode.className = 'quiz-carry-theme-row quiz-carry-theme-row--narrow';
      rowMode.style.marginBottom = '0.45rem';
      var labMode = document.createElement('label');
      labMode.className = 'admin-field quiz-carry-theme-label';
      labMode.appendChild(document.createTextNode('โหมดขอบป้าย'));
      var selMode = document.createElement('select');
      selMode.id = quizCarryPlaqueSlotPrefix(si) + 'border-mode';
      selMode.setAttribute('aria-label', 'โหมดขอบป้ายช่อง ' + (si + 1));
      [['neon', 'เรืองตามช่อง (neon)'], ['fixed', 'สีขอบคงที่']].forEach(function (opt) {
        var o = document.createElement('option');
        o.value = opt[0];
        o.textContent = opt[1];
        selMode.appendChild(o);
      });
      labMode.appendChild(selMode);
      rowMode.appendChild(labMode);
      grid.appendChild(rowMode);
      selMode.addEventListener('change', function () {
        quizCarryPlaqueUpdateNeonUi(si);
      });

      var hintNeon = document.createElement('p');
      hintNeon.className = 'muted quiz-carry-plaque-neon-hint';
      hintNeon.style.cssText = 'margin:0 0 0.5rem;font-size:0.78rem;line-height:1.45';
      hintNeon.innerHTML =
        '<strong>Neon / เรืองตามช่อง:</strong> ขอบบนแมปใช้สีตามเลขช่อง ไม่ใช้ «สีขอบ (fixed)» ด้านล่าง — ต้องการขอบตาม picker ให้เลือก <strong>สีขอบคงที่</strong> · ' +
        '<em>English:</em> In <strong>Neon</strong> mode the map uses per-slot hue; <strong>Fixed border</strong> uses the fixed-border pickers.';
      grid.appendChild(hintNeon);

      function addColorRow(labelText, kind, defHex, defAlpha) {
        var ids = quizCarryPlaqueRowIds(si, kind);
        var row = document.createElement('div');
        row.className = 'quiz-carry-theme-row';
        row.setAttribute('data-quiz-carry-plaque-color-row', kind);
        var lbl = document.createElement('span');
        lbl.className = 'quiz-carry-theme-label';
        lbl.textContent = labelText;
        row.appendChild(lbl);
        var controls = document.createElement('div');
        controls.className = 'quiz-carry-color-controls';
        var sw = document.createElement('input');
        sw.type = 'color';
        sw.id = ids.sw;
        sw.value = defHex;
        sw.title = labelText;
        controls.appendChild(sw);
        var labA = document.createElement('label');
        labA.className = 'quiz-carry-alpha-label';
        var spanA = document.createElement('span');
        spanA.textContent = 'โปร่ง A';
        labA.appendChild(spanA);
        var ra = document.createElement('input');
        ra.type = 'range';
        ra.id = ids.ra;
        ra.min = '0';
        ra.max = '100';
        ra.step = '1';
        ra.value = String(defAlpha);
        labA.appendChild(ra);
        var out = document.createElement('output');
        out.id = ids.out;
        out.className = 'quiz-carry-alpha-out';
        out.setAttribute('for', ids.ra);
        out.textContent = defAlpha + '%';
        labA.appendChild(out);
        controls.appendChild(labA);
        var hi = document.createElement('input');
        hi.type = 'hidden';
        hi.id = ids.hi;
        controls.appendChild(hi);
        row.appendChild(controls);
        grid.appendChild(row);
      }
      addColorRow('สีขอบ (fixed)', 'fixed', '#7ac8ff', 90);
      addColorRow('พื้นหลังกล่อง', 'fill', '#0c0a14', 88);
      addColorRow('สีตัวอักษร', 'text', '#f8f9ff', 100);
      var rowW = document.createElement('div');
      rowW.className = 'quiz-carry-theme-row quiz-carry-theme-row--narrow';
      var labW = document.createElement('label');
      labW.className = 'admin-field quiz-carry-theme-label';
      labW.appendChild(document.createTextNode('ความหนาขอบ (px)'));
      var inpW = document.createElement('input');
      inpW.type = 'number';
      inpW.className = 'admin-inp-num';
      inpW.id = quizCarryPlaqueSlotPrefix(si) + 'border-w';
      inpW.min = '0';
      inpW.max = '8';
      inpW.step = '0.5';
      inpW.value = '2.5';
      labW.appendChild(inpW);
      rowW.appendChild(labW);
      grid.appendChild(rowW);

      var rowImg = document.createElement('div');
      /* ห้ามใช้ quiz-carry-theme-row--narrow — มี max-width:12rem ทำช่อง URL แคบมาก ดูเหมือนอัปโหลดไม่ทำงาน */
      rowImg.className = 'quiz-carry-theme-row quiz-carry-plaque-image-row';
      rowImg.style.cssText = 'flex-wrap:wrap;gap:0.65rem;align-items:flex-end';
      var labUrl = document.createElement('label');
      labUrl.className = 'admin-field';
      labUrl.style.cssText = 'flex:1;min-width:200px;margin:0';
      labUrl.appendChild(document.createTextNode('รูปบนป้าย (ช่องนี้)'));
      var inpImgUrl = document.createElement('input');
      inpImgUrl.type = 'text';
      inpImgUrl.className = 'admin-inp-text';
      inpImgUrl.id = quizCarryPlaqueSlotPrefix(si) + 'plaque-image-url';
      inpImgUrl.placeholder = '/Game/img/quiz-carry-plaque-assets/... หรือ https://...';
      inpImgUrl.setAttribute('aria-label', 'URL รูปป้ายช่อง ' + (si + 1));
      labUrl.appendChild(document.createElement('br'));
      labUrl.appendChild(inpImgUrl);
      var prevErr = document.createElement('span');
      prevErr.id = quizCarryPlaqueSlotPrefix(si) + 'plaque-preview-err';
      prevErr.className = 'muted quiz-carry-plaque-preview-err';
      prevErr.style.cssText = 'display:block;font-size:0.72rem;margin:0.25rem 0 0.15rem;min-height:1em';
      labUrl.appendChild(prevErr);
      var prevImg = document.createElement('img');
      prevImg.id = quizCarryPlaqueSlotPrefix(si) + 'plaque-preview-img';
      prevImg.alt = 'พรีวิวรูปป้ายช่อง ' + (si + 1);
      prevImg.className = 'quiz-carry-plaque-preview-img';
      /* ห้าม width/height = 0 — บางเบราว์เซอร์แสดงกล่อง 0×0 แม้ onload แล้ว · Don't use 0×0 attrs or preview stays invisible */
      prevImg.style.cssText = 'display:none;max-height:120px;max-width:min(100%,320px);width:auto;height:auto;border-radius:8px;border:1px solid var(--border);object-fit:contain;background:var(--card)';
      labUrl.appendChild(prevImg);
      inpImgUrl.addEventListener('input', function () {
        var v = String(inpImgUrl.value || '').trim();
        if (!v) delete quizCarryPlaquePendingUrlBySlot[si];
        quizCarryPlaqueUpdateImagePreview(si);
      });
      inpImgUrl.addEventListener('change', function () {
        var v2 = String(inpImgUrl.value || '').trim();
        if (!v2) delete quizCarryPlaquePendingUrlBySlot[si];
        quizCarryPlaqueUpdateImagePreview(si);
      });
      rowImg.appendChild(labUrl);
      var upWrap = document.createElement('div');
      upWrap.className = 'admin-field';
      upWrap.style.margin = '0';
      var fileInp = document.createElement('input');
      fileInp.type = 'file';
      fileInp.accept = 'image/png,image/jpeg,image/webp,image/gif';
      fileInp.id = quizCarryPlaqueSlotPrefix(si) + 'plaque-image-file';
      fileInp.style.fontSize = '0.82rem';
      var upMsg = document.createElement('span');
      upMsg.className = 'muted';
      upMsg.id = quizCarryPlaqueSlotPrefix(si) + 'plaque-image-msg';
      upMsg.style.cssText = 'display:block;font-size:0.75rem;margin-top:0.25rem';
      fileInp.addEventListener('change', function () {
        while (upMsg.firstChild) upMsg.removeChild(upMsg.firstChild);
        upMsg.textContent = '';
        if (!fileInp.files || !fileInp.files[0]) return;
        upMsg.textContent = 'กำลังอ่านไฟล์และอัปโหลด… · Reading file & uploading…';
        try {
          upMsg.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
        } catch (scrollErr) { /* ignore */ }
        quizCarryPlaqueUploadPending++;
        quizCarryPlaqueUploadStartMs = Date.now();
        readFileAsDataURL(fileInp.files[0])
          .then(function (dataUrl) {
            return quizCarryPlaqueUploadWithFallback(dataUrl);
          })
          .then(function (res) {
            if (res && res.url) {
              var uOk = String(res.url).trim();
              inpImgUrl.value = uOk;
              quizCarryPlaquePendingUrlBySlot[si] = uOk;
              quizCarryPlaqueUpdateImagePreview(si);
              upMsg.textContent = '';
              var ok1 = document.createElement('span');
              ok1.textContent = 'อัปโหลดแล้ว · path ที่ได้: ';
              upMsg.appendChild(ok1);
              var codeU = document.createElement('code');
              codeU.style.cssText = 'font-size:0.78rem;word-break:break-all';
              codeU.textContent = res.url;
              upMsg.appendChild(codeU);
              var br = document.createElement('br');
              upMsg.appendChild(br);
              var ok2 = document.createElement('span');
              ok2.textContent = 'กด «บันทึก» ด้านล่างเพื่อเขียนลง quiz-settings.json · Then click Save below';
              upMsg.appendChild(ok2);
            } else {
              upMsg.textContent = (res && res.error) || 'ตอบกลับไม่มี url — ตรวจ Node /Game/api/quiz-carry-plaque-upload';
            }
          })
          .catch(function (e) {
            upMsg.textContent = e.message || 'อัปโหลดไม่สำเร็จ';
            setMsg('quiz-carry-settings-msg', e.message || 'อัปโหลดรูปป้ายไม่สำเร็จ · Plaque upload failed', 'error');
            try {
              upMsg.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
              var smUp = el('quiz-carry-settings-msg');
              if (smUp) smUp.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
            } catch (scrollE) { /* ignore */ }
          })
          .finally(function () {
            fileInp.value = '';
            quizCarryPlaqueUploadPending = Math.max(0, quizCarryPlaqueUploadPending - 1);
            if (quizCarryPlaqueUploadPending === 0) quizCarryPlaqueUploadStartMs = 0;
          });
      });
      upWrap.appendChild(document.createTextNode('อัปโหลด'));
      upWrap.appendChild(document.createElement('br'));
      upWrap.appendChild(fileInp);
      upWrap.appendChild(upMsg);
      rowImg.appendChild(upWrap);
      grid.appendChild(rowImg);

      det.appendChild(grid);
      root.appendChild(det);
      quizCarryPlaqueUpdateNeonUi(si);
    }
    root.setAttribute('data-mounted', '1');
  }

  function quizCarryPlaqueComposeFromPickers(si, kind) {
    var ids = quizCarryPlaqueRowIds(si, kind);
    var sw = el(ids.sw);
    var ra = el(ids.ra);
    var fb = QUIZ_CARRY_PLAQUE_DEFAULTS_RGBA[kind] || QUIZ_CARRY_PLAQUE_DEFAULTS_RGBA.fill;
    if (!sw || !ra) return quizCarryRgbToRgbaString(fb);
    var pr = quizCarryParseHexToRgb(sw.value);
    if (!pr) return quizCarryRgbToRgbaString(fb);
    var pct = parseInt(String(ra.value), 10);
    if (!Number.isFinite(pct)) pct = Math.round((fb.a != null ? fb.a : 1) * 100);
    pct = Math.max(0, Math.min(100, pct));
    return quizCarryRgbToRgbaString({ r: pr.r, g: pr.g, b: pr.b, a: pct / 100 });
  }

  function quizCarryPlaqueSetPickersFromString(si, kind, cssStr) {
    var ids = quizCarryPlaqueRowIds(si, kind);
    var fb = QUIZ_CARRY_PLAQUE_DEFAULTS_RGBA[kind] || QUIZ_CARRY_PLAQUE_DEFAULTS_RGBA.fill;
    var o = quizCarryParseCssColor(cssStr, fb);
    var sw = el(ids.sw);
    var ra = el(ids.ra);
    var hi = el(ids.hi);
    var out = el(ids.out);
    if (sw) sw.value = quizCarryHexFromRgb(o.r, o.g, o.b);
    if (ra) ra.value = String(Math.round((o.a != null ? o.a : 1) * 100));
    if (out) out.textContent = ra ? ra.value + '%' : '';
    if (hi) hi.value = quizCarryRgbToRgbaString(o);
  }

  function quizCarryPlaqueSyncRow(si, kind) {
    var s = quizCarryPlaqueComposeFromPickers(si, kind);
    var ids = quizCarryPlaqueRowIds(si, kind);
    var hi = el(ids.hi);
    var out = el(ids.out);
    var ra = el(ids.ra);
    if (hi) hi.value = s;
    if (out && ra) out.textContent = ra.value + '%';
  }

  var quizCarryPlaqueBindPickersDone = false;
  function quizCarryPlaqueBindPickersOnce() {
    if (quizCarryPlaqueBindPickersDone) return;
    quizCarryPlaqueEnsureMounted();
    for (var si = 0; si < QUIZ_CARRY_PLAQUE_SLOT_COUNT; si++) {
      QUIZ_CARRY_PLAQUE_KINDS.forEach(function (kind) {
        var ids = quizCarryPlaqueRowIds(si, kind);
        var sw = el(ids.sw);
        var ra = el(ids.ra);
        if (sw) {
          sw.addEventListener('input', function () {
            quizCarryPlaqueSyncRow(si, kind);
          });
        }
        if (ra) {
          ra.addEventListener('input', function () {
            quizCarryPlaqueSyncRow(si, kind);
          });
        }
      });
    }
    quizCarryPlaqueBindPickersDone = true;
  }

  function quizCarryPlaqueBuildForSave() {
    quizCarryPlaqueEnsureMounted();
    quizCarryPlaqueBindPickersOnce();
    var arr = [];
    for (var si = 0; si < QUIZ_CARRY_PLAQUE_SLOT_COUNT; si++) {
      for (var ki = 0; ki < QUIZ_CARRY_PLAQUE_KINDS.length; ki++) {
        quizCarryPlaqueSyncRow(si, QUIZ_CARRY_PLAQUE_KINDS[ki]);
      }
      var modeEl = el(quizCarryPlaqueSlotPrefix(si) + 'border-mode');
      var mode = modeEl && modeEl.value === 'fixed' ? 'fixed' : 'neon';
      var bwEl = el(quizCarryPlaqueSlotPrefix(si) + 'border-w');
      var bw = bwEl ? parseFloat(String(bwEl.value)) : 2.5;
      if (!Number.isFinite(bw)) bw = 2.5;
      bw = Math.round(Math.max(0, Math.min(8, bw)) * 10) / 10;
      var imgUrlEl = el(quizCarryPlaqueSlotPrefix(si) + 'plaque-image-url');
      var plaqueImageUrl = imgUrlEl ? String(imgUrlEl.value || '').trim() : '';
      if (!plaqueImageUrl && quizCarryPlaquePendingUrlBySlot[si]) {
        plaqueImageUrl = String(quizCarryPlaquePendingUrlBySlot[si] || '').trim();
        if (imgUrlEl && plaqueImageUrl) imgUrlEl.value = plaqueImageUrl;
      }
      plaqueImageUrl = plaqueImageUrl.slice(0, 512);
      arr.push({
        borderMode: mode,
        fixedBorder: quizCarryPlaqueComposeFromPickers(si, 'fixed'),
        fillBg: quizCarryPlaqueComposeFromPickers(si, 'fill'),
        textColor: quizCarryPlaqueComposeFromPickers(si, 'text'),
        borderWidthPx: bw,
        plaqueImageUrl: plaqueImageUrl,
      });
    }
    return arr;
  }

  function quizCarryPlaqueFillSlot(si, t) {
    var obj = t && typeof t === 'object' ? t : {};
    var modeEl = el(quizCarryPlaqueSlotPrefix(si) + 'border-mode');
    if (modeEl) modeEl.value = String(obj.borderMode || '').toLowerCase() === 'fixed' ? 'fixed' : 'neon';
    quizCarryPlaqueSetPickersFromString(si, 'fixed', obj.fixedBorder);
    quizCarryPlaqueSetPickersFromString(si, 'fill', obj.fillBg);
    quizCarryPlaqueSetPickersFromString(si, 'text', obj.textColor);
    var bwEl = el(quizCarryPlaqueSlotPrefix(si) + 'border-w');
    var bw = parseFloat(String(obj.borderWidthPx));
    if (bwEl) {
      bwEl.value = String(Number.isFinite(bw) ? Math.round(Math.max(0, Math.min(8, bw)) * 10) / 10 : 2.5);
    }
    var imgEl = el(quizCarryPlaqueSlotPrefix(si) + 'plaque-image-url');
    if (imgEl) {
      imgEl.value = obj.plaqueImageUrl != null ? String(obj.plaqueImageUrl) : '';
    }
    var srvU = obj.plaqueImageUrl != null ? String(obj.plaqueImageUrl).trim() : '';
    if (srvU) quizCarryPlaquePendingUrlBySlot[si] = srvU.slice(0, 512);
    var msgEl = el(quizCarryPlaqueSlotPrefix(si) + 'plaque-image-msg');
    if (msgEl) msgEl.textContent = '';
    quizCarryPlaqueUpdateNeonUi(si);
    quizCarryPlaqueUpdateImagePreview(si);
  }

  function quizCarryPlaqueFillAllFromApi(data) {
    quizCarryPlaqueBindPickersOnce();
    var arr = null;
    if (data && Array.isArray(data.carryChoicePlaqueThemes) && data.carryChoicePlaqueThemes.length) {
      arr = data.carryChoicePlaqueThemes;
    } else if (data && data.carryChoicePlaqueTheme && typeof data.carryChoicePlaqueTheme === 'object') {
      arr = [];
      for (var u = 0; u < QUIZ_CARRY_PLAQUE_SLOT_COUNT; u++) arr.push(data.carryChoicePlaqueTheme);
    }
    for (var si = 0; si < QUIZ_CARRY_PLAQUE_SLOT_COUNT; si++) {
      var th = (arr && arr[si]) ? arr[si] : {};
      quizCarryPlaqueFillSlot(si, th);
      quizCarryPlaqueUpdateImagePreview(si);
    }
  }

  function quizCarrySetPlaqueMapScaleInputs(scale) {
    var pms = Number(scale);
    if (!Number.isFinite(pms)) pms = 1.25;
    pms = Math.max(0.85, Math.min(2.5, pms));
    var cent = Math.round(pms * 100);
    cent = Math.max(85, Math.min(250, cent));
    var num = el('quiz-carry-plaque-map-scale');
    var rng = el('quiz-carry-plaque-map-scale-range');
    var out = el('quiz-carry-plaque-map-scale-out');
    if (num) num.value = String(Math.round((cent / 100) * 100) / 100);
    if (rng) rng.value = String(cent);
    if (out) out.textContent = '× ' + (num ? num.value : String(cent / 100));
  }

  function wireQuizCarryPlaqueMapScaleControls() {
    if (quizCarryPlaqueScaleControlsWired) return;
    var num = el('quiz-carry-plaque-map-scale');
    var rng = el('quiz-carry-plaque-map-scale-range');
    if (!num || !rng) return;
    quizCarryPlaqueScaleControlsWired = true;
    function fromRange() {
      var c = parseInt(String(rng.value), 10);
      if (!Number.isFinite(c)) c = 125;
      c = Math.max(85, Math.min(250, c));
      rng.value = String(c);
      var sc = c / 100;
      num.value = String(Math.round(sc * 100) / 100);
      var out = el('quiz-carry-plaque-map-scale-out');
      if (out) out.textContent = '× ' + num.value;
    }
    function fromNum() {
      var p = parseFloat(String(num.value || '').replace(',', '.'));
      if (!Number.isFinite(p)) p = 1.25;
      p = Math.max(0.85, Math.min(2.5, p));
      rng.value = String(Math.round(p * 100));
      num.value = String(Math.round(p * 100) / 100);
      var out = el('quiz-carry-plaque-map-scale-out');
      if (out) out.textContent = '× ' + num.value;
    }
    rng.addEventListener('input', fromRange);
    rng.addEventListener('change', fromRange);
    num.addEventListener('input', fromNum);
    num.addEventListener('change', fromNum);
  }

  function loadQuizCarryPanel(opts) {
    opts = opts || {};
    var delay = Number(opts.fetchDelayMs) || 0;
    var runLoad = function () {
      gameQuizFetch('GET').then(function (data) {
        if (opts.themeOverride && typeof opts.themeOverride === 'object') {
          var ov = opts.themeOverride;
          if (
            ov.panelBg != null ||
            ov.borderWidthPx != null ||
            ov.panelBorder != null ||
            ov.textColor != null ||
            ov.questionFontMinPx != null ||
            ov.questionFontMaxPx != null
          ) {
            data.carryMapPanelTheme = ov;
          } else if (ov.carryMapPanelTheme && typeof ov.carryMapPanelTheme === 'object') {
            data.carryMapPanelTheme = ov.carryMapPanelTheme;
          }
          if (ov.carryEmbedCountdownTheme && typeof ov.carryEmbedCountdownTheme === 'object') {
            data.carryEmbedCountdownTheme = ov.carryEmbedCountdownTheme;
          }
          if (ov.carryChoicePlaqueThemes && Array.isArray(ov.carryChoicePlaqueThemes)) {
            data.carryChoicePlaqueThemes = ov.carryChoicePlaqueThemes;
            if (ov.carryChoicePlaqueThemes[0] && typeof ov.carryChoicePlaqueThemes[0] === 'object') {
              data.carryChoicePlaqueTheme = ov.carryChoicePlaqueThemes[0];
            }
          } else if (ov.carryChoicePlaqueTheme && typeof ov.carryChoicePlaqueTheme === 'object') {
            /* legacy อ็อบเจ็กต์เดียว — ต้องตั้งทั้งอาร์เรย์ ไม่งั้น Fill ยังใช้ carryChoicePlaqueThemes จาก GET เก่า (URL ป้ายหายหลังบันทึก) */
            data.carryChoicePlaqueTheme = ov.carryChoicePlaqueTheme;
            var expPlaque = [];
            for (var exi = 0; exi < QUIZ_CARRY_PLAQUE_SLOT_COUNT; exi++) {
              expPlaque.push(ov.carryChoicePlaqueTheme);
            }
            data.carryChoicePlaqueThemes = expPlaque;
          }
        }
        if (opts.timingOverride && typeof opts.timingOverride === 'object') {
          var t = opts.timingOverride;
          if (t.carryReadMs != null) data.carryReadMs = t.carryReadMs;
          if (t.carryAnswerMs != null) data.carryAnswerMs = t.carryAnswerMs;
          if (t.carrySessionLength != null) data.carrySessionLength = t.carrySessionLength;
          if (t.carryWalkSpeedMultForMapId !== undefined) data.carryWalkSpeedMultForMapId = t.carryWalkSpeedMultForMapId;
          if (t.carryWalkSpeedMult !== undefined) data.carryWalkSpeedMult = t.carryWalkSpeedMult;
        }
      renderQuizCarryAdminList(data.carryQuestions || []);
      var readSec = el('quiz-carry-read-sec');
      var ansSec = el('quiz-carry-answer-sec');
      if (readSec) {
        var rms = Number(data.carryReadMs);
        readSec.value = String(Number.isFinite(rms) ? Math.round(rms / 1000) : 3);
      }
      if (ansSec) {
        var ams = Number(data.carryAnswerMs);
        ansSec.value = String(Number.isFinite(ams) ? Math.round(ams / 1000) : 5);
      }
      var sessLen = el('quiz-carry-session-len');
      if (sessLen) {
        var sl = parseInt(String(data.carrySessionLength), 10);
        sessLen.value = String(Number.isFinite(sl) && sl >= 0 ? sl : 0);
      }
      var walkMapIdInp = el('quiz-carry-walk-map-id');
      if (walkMapIdInp) {
        walkMapIdInp.value = data.carryWalkSpeedMultForMapId ? String(data.carryWalkSpeedMultForMapId).trim() : '';
      }
      var walkMultInp = el('quiz-carry-walk-mult');
      if (walkMultInp) {
        var wmv = Number(data.carryWalkSpeedMult);
        walkMultInp.value = String(Number.isFinite(wmv) ? wmv : 1.42);
      }
      quizCarrySetPlaqueMapScaleInputs(data.carryChoicePlaqueMapScale);
      quizCarryBindThemePickersOnce();
      var th = data.carryMapPanelTheme && typeof data.carryMapPanelTheme === 'object' ? data.carryMapPanelTheme : {};
      quizCarrySetPickersFromColorString('bg', th.panelBg);
      quizCarrySetPickersFromColorString('border', th.panelBorder);
      quizCarrySetPickersFromColorString('text', th.textColor);
      var bwInp = el('quiz-carry-theme-border-w');
      if (bwInp) {
        var bw = parseInt(String(th.borderWidthPx), 10);
        bwInp.value = String(Number.isFinite(bw) && bw >= 0 ? Math.min(12, bw) : 2);
      }
      var qfMinInp = el('quiz-carry-theme-qfont-min');
      var qfMaxInp = el('quiz-carry-theme-qfont-max');
      if (qfMinInp) {
        var qm = parseInt(String(th.questionFontMinPx), 10);
        qfMinInp.value = String(Number.isFinite(qm) ? Math.max(10, Math.min(40, qm)) : 10);
      }
      if (qfMaxInp) {
        var qx = parseInt(String(th.questionFontMaxPx), 10);
        qfMaxInp.value = String(Number.isFinite(qx) ? Math.max(14, Math.min(56, qx)) : 24);
      }
      quizCarryEcdFillForm(data.carryEmbedCountdownTheme || {});
      quizCarryPlaqueFillAllFromApi(data);
      if (opts.clearMsg !== false) setMsg('quiz-carry-settings-msg', '', '');
    }).catch(function (e) {
      setMsg('quiz-carry-settings-msg', e.message || 'โหลดไม่ได้', 'error');
    });
    };
    if (delay > 0) setTimeout(runLoad, delay);
    else runLoad();
  }

  /** รอจน plaque upload จบ (pending=0) — กันกดบันทึกทันทีหลังเลือกไฟล์แล้ว build ได้ URL ว่าง · returns false if timeout */
  function waitUntilQuizCarryUploadsDone(maxMs) {
    maxMs = maxMs || 120000;
    return new Promise(function (resolve) {
      if (quizCarryPlaqueUploadPending <= 0) return resolve(true);
      var started = Date.now();
      var iv = setInterval(function () {
        if (quizCarryPlaqueUploadPending <= 0) {
          clearInterval(iv);
          resolve(true);
        } else if (Date.now() - started >= maxMs) {
          clearInterval(iv);
          resolve(false);
        }
      }, 40);
    });
  }

  function saveQuizCarryPanel() {
    var list = el('quiz-carry-admin-list');
    var saveBtn = el('btn-quiz-carry-save');
    if (!list) {
      setMsg('quiz-carry-settings-msg', 'ไม่พบรายการคำถามในแท็บนี้ — รีเฟรชหน้า · quiz-carry-admin-list missing', 'error');
      return;
    }
    if (quizCarryPlaqueUploadPending > 0 && quizCarryPlaqueUploadStartMs > 0 && Date.now() - quizCarryPlaqueUploadStartMs > 120000) {
      quizCarryPlaqueUploadPending = 0;
      quizCarryPlaqueUploadStartMs = 0;
      setMsg(
        'quiz-carry-settings-msg',
        'ยกเลิกสถานะอัปโหลดค้าง (>2 นาที) แล้วดำเนินการบันทึก — ถ้ายังต้องการรูปให้อัปโหลดใหม่ · Stuck upload cleared; re-upload if needed',
        'error',
      );
    }
    if (quizCarrySaveInFlight) {
      setMsg('quiz-carry-settings-msg', 'กำลังบันทึกอยู่แล้ว — รอสักครู่ · Save already in progress', 'error');
      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-label').forEach(function (lab, idx) {
        var ti = lab.querySelector('.quiz-carry-slot-inp');
        var ii = lab.querySelector('.quiz-carry-slot-img');
        var tv = ti && ti.value ? String(ti.value).trim() : '';
        var iv = ii && ii.value ? String(ii.value).trim().slice(0, 512) : '';
        if (tv) slots.push({ idx: idx, text: tv, imageUrl: iv });
      });
      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;
      var rowOut = {
        text: text,
        choices: slots.map(function (s) {
          return s.text;
        }),
        correctIndex: correctIndex,
      };
      var urls = slots.map(function (s) {
        return s.imageUrl || '';
      });
      if (urls.some(function (u) {
        return u;
      })) rowOut.choiceImageUrls = urls;
      carryQuestions.push(rowOut);
    });

    var readSecEl = el('quiz-carry-read-sec');
    var ansSecEl = el('quiz-carry-answer-sec');
    var readSec = readSecEl ? parseInt(String(readSecEl.value || '3'), 10) : 3;
    var ansSec = ansSecEl ? parseInt(String(ansSecEl.value || '5'), 10) : 5;
    if (!Number.isFinite(readSec) || readSec < 0) readSec = 0;
    if (readSec > 120) readSec = 120;
    if (!Number.isFinite(ansSec) || ansSec < 1) ansSec = 1;
    if (ansSec > 300) ansSec = 300;
    var carryReadMs = readSec * 1000;
    var carryAnswerMs = ansSec * 1000;
    var sessEl = el('quiz-carry-session-len');
    var carrySessionLength = sessEl ? parseInt(String(sessEl.value || '0'), 10) : 0;
    if (!Number.isFinite(carrySessionLength) || carrySessionLength < 0) carrySessionLength = 0;
    if (carrySessionLength > 500) carrySessionLength = 500;

    var carryMapPanelTheme = quizCarryBuildThemeForSave();

    var blockEls = list.querySelectorAll('.quiz-carry-admin-block');
    var hasAnyQuestionText = false;
    for (var bi = 0; bi < blockEls.length; bi++) {
      var qn = blockEls[bi].querySelector('.quiz-carry-q-text');
      if (qn && String(qn.value || '').trim()) {
        hasAnyQuestionText = true;
        break;
      }
    }
    if (carryQuestions.length === 0 && hasAnyQuestionText) {
      setMsg(
        'quiz-carry-settings-msg',
        'ยังบันทึกชุดคำถามไม่ได้: แต่ละข้อต้องมีคำถาม ตัวเลือกอย่างน้อย 2 ช่องที่กรอกแล้ว และเลือก «ข้อที่ถูกต้อง» — ตรวจแถวที่มีข้อความค้าง',
        'error',
      );
      return;
    }

    quizCarrySaveInFlight = true;
    if (saveBtn) {
      saveBtn.disabled = true;
      saveBtn.setAttribute('aria-busy', 'true');
    }
    var waitLine =
      quizCarryPlaqueUploadPending > 0
        ? 'กำลังรอให้อัปโหลดรูปป้ายจบ แล้วจะบันทึกอัตโนมัติ (ไม่ต้องกดซ้ำ)… · Waiting for plaque upload, then save…'
        : 'กำลังบันทึก… · Saving…';
    setMsg('quiz-carry-settings-msg', waitLine, '');
    try {
      var smEl = el('quiz-carry-settings-msg');
      if (smEl) smEl.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
    } catch (scrollSave) { /* ignore */ }

    waitUntilQuizCarryUploadsDone(120000).then(function (uploadsOk) {
      if (!uploadsOk) {
        quizCarrySaveInFlight = false;
        if (saveBtn) {
          saveBtn.disabled = false;
          saveBtn.removeAttribute('aria-busy');
        }
        setMsg(
          'quiz-carry-settings-msg',
          'รออัปโหลดนานเกิน 2 นาที — ตรวจเครือข่าย/เซิร์ฟเกมแล้วลองใหม่ · Upload wait timeout',
          'error',
        );
        return;
      }
      var plaqueScaleEl = el('quiz-carry-plaque-map-scale');
      var plaqueMapScale = 1.25;
      if (plaqueScaleEl) {
        var psn = parseFloat(String(plaqueScaleEl.value || '').replace(',', '.'));
        if (Number.isFinite(psn)) plaqueMapScale = Math.max(0.85, Math.min(2.5, psn));
      }
      var walkMapIdRaw = el('quiz-carry-walk-map-id') && el('quiz-carry-walk-map-id').value ? String(el('quiz-carry-walk-map-id').value).trim() : '';
      var walkMapId = walkMapIdRaw.replace(/[^a-zA-Z0-9_-]/g, '').slice(0, 64);
      var walkMultRaw = el('quiz-carry-walk-mult') ? parseFloat(String(el('quiz-carry-walk-mult').value || '').replace(',', '.')) : NaN;
      var putBody = {
        carryReadMs: carryReadMs,
        carryAnswerMs: carryAnswerMs,
        carrySessionLength: carrySessionLength,
        carryMapPanelTheme: carryMapPanelTheme,
        carryEmbedCountdownTheme: quizCarryEcdBuildForSave(),
        carryChoicePlaqueThemes: quizCarryPlaqueBuildForSave(),
        carryChoicePlaqueMapScale: plaqueMapScale,
      };
      if (walkMapId) {
        putBody.carryWalkSpeedMultForMapId = walkMapId;
        putBody.carryWalkSpeedMult = Number.isFinite(walkMultRaw) ? Math.max(0.5, Math.min(3, walkMultRaw)) : 1.42;
      } else {
        putBody.carryWalkSpeedMultForMapId = '';
        putBody.carryWalkSpeedMult = null;
      }
      if (carryQuestions.length > 0) {
        putBody.carryQuestions = carryQuestions;
      }

      gameQuizFetch('PUT', putBody).then(function (res) {
      var tail = carryQuestions.length ? ' · คำถาม ' + carryQuestions.length + ' ข้อ' : ' · คงชุดคำถามเดิม (อัปเดตเวลา/ธีมอย่างเดียว)';
      var themeFromRes = res && res.carryMapPanelTheme && typeof res.carryMapPanelTheme === 'object' ? res.carryMapPanelTheme : null;
      var ecdFromRes = res && res.carryEmbedCountdownTheme && typeof res.carryEmbedCountdownTheme === 'object' ? res.carryEmbedCountdownTheme : null;
      var plaqueFromRes = null;
      if (res && Array.isArray(res.carryChoicePlaqueThemes) && res.carryChoicePlaqueThemes.length) {
        plaqueFromRes = res.carryChoicePlaqueThemes;
      } else if (res && res.carryChoicePlaqueTheme && typeof res.carryChoicePlaqueTheme === 'object') {
        plaqueFromRes = [];
        for (var pxi = 0; pxi < QUIZ_CARRY_PLAQUE_SLOT_COUNT; pxi++) {
          plaqueFromRes.push(res.carryChoicePlaqueTheme);
        }
      }
      if (!plaqueFromRes) {
        plaqueFromRes = quizCarryPlaqueBuildForSave();
      }
      var themeOk = !!themeFromRes || !!ecdFromRes || !!plaqueFromRes;
      var themeTail = themeOk ? ' · ธีมแผง/ป้าย/นับถอยหลังบันทึกแล้ว' : '';
      setMsg('quiz-carry-settings-msg', 'บันทึกแล้ว' + tail + themeTail, 'ok');
      quizCarryPlaquePendingUrlBySlot = {};
      loadQuizCarryPanel({
        clearMsg: false,
        themeOverride: {
          carryMapPanelTheme: themeFromRes || carryMapPanelTheme,
          carryEmbedCountdownTheme: ecdFromRes || quizCarryEcdBuildForSave(),
          carryChoicePlaqueThemes: Array.isArray(plaqueFromRes) ? plaqueFromRes : null,
          carryChoicePlaqueTheme:
            Array.isArray(plaqueFromRes) && plaqueFromRes[0] && typeof plaqueFromRes[0] === 'object'
              ? plaqueFromRes[0]
              : null,
        },
        timingOverride: {
          carryReadMs: carryReadMs,
          carryAnswerMs: carryAnswerMs,
          carrySessionLength: carrySessionLength,
          carryWalkSpeedMultForMapId: walkMapId,
          carryWalkSpeedMult: walkMapId ? (Number.isFinite(walkMultRaw) ? Math.max(0.5, Math.min(3, walkMultRaw)) : 1.42) : null,
        },
        fetchDelayMs: 120,
      });
      }).catch(function (e) {
        setMsg('quiz-carry-settings-msg', e.message || 'บันทึกไม่ได้', 'error');
      }).finally(function () {
        quizCarrySaveInFlight = false;
        if (saveBtn) {
          saveBtn.disabled = false;
          saveBtn.removeAttribute('aria-busy');
        }
      });
    });
  }

  /** 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);
    });
  }

  /** พรีวิวคอลัมน์ beam — สูงแนวตั้ง + สีเติม/กรอบตามช่อง (คล้ายในเกม) */
  function styleGameTimingLaserBeamPreviewShell() {
    var prev = el('game-timing-laser-line-preview');
    if (!prev) return;
    var fillIn = el('game-timing-laser-fill');
    var strokeIn = el('game-timing-laser-stroke');
    var lwIn = el('game-timing-laser-line-width');
    var fill = fillIn && fillIn.value ? String(fillIn.value).trim() : '';
    var stroke = strokeIn && strokeIn.value ? String(strokeIn.value).trim() : '';
    var lw = lwIn ? parseInt(lwIn.value, 10) : 2;
    if (Number.isNaN(lw)) lw = 2;
    lw = Math.max(0, Math.min(24, lw));
    prev.style.backgroundColor = fill || '';
    if (lw > 0 && stroke) {
      prev.style.boxShadow = 'inset 0 0 0 ' + Math.min(8, lw) + 'px ' + stroke;
    } else {
      prev.style.boxShadow = '';
    }
  }

  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);
    });
    styleGameTimingLaserBeamPreviewShell();
  }

  function clamp255(x) {
    return Math.max(0, Math.min(255, Math.round(Number(x))));
  }

  function parseCssColorToRgba(str) {
    str = String(str || '').trim();
    if (!str) return null;
    var m = str.match(/^rgba?\(\s*([\d.]+)\s*,\s*([\d.]+)\s*,\s*([\d.]+)\s*(?:,\s*([\d.]+)\s*)?\)$/i);
    if (m) {
      var r = clamp255(m[1]);
      var g = clamp255(m[2]);
      var b = clamp255(m[3]);
      var a =
        m[4] !== undefined && m[4] !== '' && !Number.isNaN(Number(m[4]))
          ? Math.max(0, Math.min(1, Number(m[4])))
          : 1;
      return { r: r, g: g, b: b, a: a };
    }
    m = str.match(/^#([\da-f]{3}|[\da-f]{6})$/i);
    if (m) {
      var h = m[1];
      var r2;
      var g2;
      var b2;
      if (h.length === 3) {
        r2 = parseInt(h[0] + h[0], 16);
        g2 = parseInt(h[1] + h[1], 16);
        b2 = parseInt(h[2] + h[2], 16);
      } else {
        r2 = parseInt(h.slice(0, 2), 16);
        g2 = parseInt(h.slice(2, 4), 16);
        b2 = parseInt(h.slice(4, 6), 16);
      }
      if (Number.isNaN(r2) || Number.isNaN(g2) || Number.isNaN(b2)) return null;
      return { r: r2, g: g2, b: b2, a: 1 };
    }
    var probe = document.createElement('span');
    probe.style.cssText = 'position:absolute;visibility:hidden;left:0;top:0;background-color:' + str;
    document.body.appendChild(probe);
    var bg = getComputedStyle(probe).backgroundColor;
    document.body.removeChild(probe);
    m = bg && bg.match(/^rgba?\(\s*([\d.]+)\s*,\s*([\d.]+)\s*,\s*([\d.]+)\s*(?:,\s*([\d.]+)\s*)?\)$/);
    if (!m) return null;
    r2 = clamp255(m[1]);
    g2 = clamp255(m[2]);
    b2 = clamp255(m[3]);
    var a2 = m[4] !== undefined && !Number.isNaN(Number(m[4])) ? Math.max(0, Math.min(1, Number(m[4]))) : 1;
    return { r: r2, g: g2, b: b2, a: a2 };
  }

  function rgbToHex6(r, g, b) {
    function hx(n) {
      var h = clamp255(n).toString(16);
      return h.length === 1 ? '0' + h : h;
    }
    return '#' + hx(r) + hx(g) + hx(b);
  }

  function laserHexFromTextOrFallback(text, fallbackHex) {
    var c = parseCssColorToRgba(text);
    if (!c) return fallbackHex;
    return rgbToHex6(c.r, c.g, c.b);
  }

  function formatLaserRgba(r, g, b, a) {
    var aa = Math.round(Math.max(0, Math.min(1, a)) * 100) / 100;
    return 'rgba(' + clamp255(r) + ',' + clamp255(g) + ',' + clamp255(b) + ',' + aa + ')';
  }

  function syncGameTimingLaserColorSwatches() {
    function apply(swatchId, textVal) {
      var sw = el(swatchId);
      if (!sw) return;
      var v = textVal != null ? String(textVal).trim() : '';
      sw.style.backgroundColor = v || '';
      sw.classList.toggle('is-empty', !v);
      sw.title = v || 'ว่าง — พิมพ์ค่า CSS หรือกดสี่เหลี่ยมเพื่อเลือกสี';
    }
    var fillIn = el('game-timing-laser-fill');
    var strokeIn = el('game-timing-laser-stroke');
    apply('game-timing-laser-fill-swatch', fillIn && fillIn.value);
    apply('game-timing-laser-stroke-swatch', strokeIn && strokeIn.value);
    var fillPk = el('game-timing-laser-fill-picker');
    var strokePk = el('game-timing-laser-stroke-picker');
    if (fillPk && fillIn) {
      var hf = laserHexFromTextOrFallback(fillIn.value, '#ef4444');
      if (fillPk.value.toLowerCase() !== hf.toLowerCase()) fillPk.value = hf;
    }
    if (strokePk && strokeIn) {
      var hs = laserHexFromTextOrFallback(strokeIn.value, '#fca5a5');
      if (strokePk.value.toLowerCase() !== hs.toLowerCase()) strokePk.value = hs;
    }
    styleGameTimingLaserBeamPreviewShell();
  }

  function bindGameTimingLaserColorSwatches() {
    var fillIn = el('game-timing-laser-fill');
    var strokeIn = el('game-timing-laser-stroke');
    if (fillIn) {
      fillIn.addEventListener('input', syncGameTimingLaserColorSwatches);
      fillIn.addEventListener('change', syncGameTimingLaserColorSwatches);
    }
    if (strokeIn) {
      strokeIn.addEventListener('input', syncGameTimingLaserColorSwatches);
      strokeIn.addEventListener('change', syncGameTimingLaserColorSwatches);
    }
    function wirePicker(pickerId, textEl, defaultAlpha) {
      var pk = el(pickerId);
      var tx = textEl;
      if (!pk || !tx) return;
      function applyHex() {
        var hex = String(pk.value || '').trim();
        if (!/^#[\da-f]{6}$/i.test(hex)) return;
        var r = parseInt(hex.slice(1, 3), 16);
        var g = parseInt(hex.slice(3, 5), 16);
        var b = parseInt(hex.slice(5, 7), 16);
        var prev = parseCssColorToRgba(tx.value);
        var a = prev && typeof prev.a === 'number' ? prev.a : defaultAlpha;
        tx.value = formatLaserRgba(r, g, b, a);
        syncGameTimingLaserColorSwatches();
      }
      pk.addEventListener('input', applyHex);
      pk.addEventListener('change', applyHex);
    }
    wirePicker('game-timing-laser-fill-picker', fillIn, 0.35);
    wirePicker('game-timing-laser-stroke-picker', strokeIn, 0.95);
    var lwIn = el('game-timing-laser-line-width');
    if (lwIn) {
      lwIn.addEventListener('input', styleGameTimingLaserBeamPreviewShell);
      lwIn.addEventListener('change', styleGameTimingLaserBeamPreviewShell);
    }
    syncGameTimingLaserColorSwatches();
  }

  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 = {};
        var parsed = false;
        try {
          j = text ? JSON.parse(text) : {};
          parsed = true;
        } catch (e) {
          if (!r.ok) {
            var snippet = (text || '').replace(/\s+/g, ' ').trim().slice(0, 220);
            var tail = '';
            if (r.status === 413) {
              tail =
                ' · คำขอใหญ่เกิน (nginx client_max_body_size / PHP post_max_size) — รัน deploy-nginx และตั้ง post_max_size ≥20M · Payload too large';
            } else if (r.status === 401) {
              tail = ' · ล็อกอิน Admin ใหม่ · Re-login to Admin';
            } else if (r.status === 502 || r.status === 503 || r.status === 504) {
              tail = ' · เซิร์ฟเกม/PHP upstream ล่ม — ตรวจ Node + php-fpm · Upstream error';
            } else if (r.status === 404) {
              tail = ' · ตรวจ path ไฟล์ / รีสตาร์ทบริการหลัง deploy · Not found';
            }
            throw new Error((snippet || r.statusText || 'Request failed') + tail + ' (HTTP ' + r.status + ')');
          }
          throw e;
        }
        if (!r.ok) {
          var plain = (j && j.error) || r.statusText || 'Request failed';
          if (r.status === 413) {
            plain =
              (j && j.error) ||
              'ไฟล์/คำขอใหญ่เกินขีดจำกัด (nginx หรือ PHP) — ตั้ง client_max_body_size (server หรือ /Admin/api/) และ post_max_size ≥20M · Payload too large';
          }
          if (r.status === 401) {
            plain =
              (j && j.error) ||
              'หมดเซสชันแอดมิน — ล็อกอินใหม่แล้วลองอัปโหลดอีกครั้ง · Re-login to Admin and retry upload';
          }
          if (r.status === 404) {
            plain += ' — รีสตาร์ท Node ที่รัน Game/server.js หลัง deploy · Restart Game Node';
          }
          if (r.status === 502 || r.status === 503 || r.status === 504) {
            plain +=
              ' — PHP/Node upstream ล่ม — ตรวจ game-zep (Node) และ php-fpm · Check Node + PHP-FPM';
          }
          if (parsed && (!j || Object.keys(j).length === 0)) {
            plain = (text || '').replace(/\s+/g, ' ').trim().slice(0, 200) || plain;
            if (r.status) plain += ' (HTTP ' + r.status + ')';
          }
          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) : '';
    }
    if (el('stack-tower-mission-sec')) {
      var st = Number(data.stackTowerMissionTimeSec);
      el('stack-tower-mission-sec').value = String(Number.isFinite(st) && st > 0 ? Math.floor(Math.max(10, Math.min(7200, st))) : 90);
    }
    if (el('stack-team-misses-max')) {
      var sm = Number(data.stackTeamMissesMax);
      el('stack-team-misses-max').value = String(Number.isFinite(sm) ? Math.floor(Math.max(1, Math.min(20, sm))) : 3);
    }
    if (el('stack-tower-progress-blocks')) {
      var pb = Number(data.stackTowerProgressBlocks);
      el('stack-tower-progress-blocks').value = String(Number.isFinite(pb) ? Math.floor(Math.max(1, Math.min(500, pb))) : 50);
    }
    if (el('stack-heavy-block-percent')) {
      var shp = Number(data.stackHeavyBlockPercent);
      el('stack-heavy-block-percent').value = String(Number.isFinite(shp) ? Math.max(0, Math.min(100, Math.floor(shp))) : 35);
    }
    var normArr = Array.isArray(data.stackBlockNormalImageUrls) ? data.stackBlockNormalImageUrls : [];
    var heavyArr = Array.isArray(data.stackBlockHeavyImageUrls) ? data.stackBlockHeavyImageUrls : [];
    for (var si = 1; si <= 6; si++) {
      var nin = el('stack-block-normal-url-' + si);
      var hin = el('stack-block-heavy-url-' + si);
      if (nin) nin.value = normArr[si - 1] != null ? String(normArr[si - 1]) : '';
      if (hin) hin.value = heavyArr[si - 1] != null ? String(heavyArr[si - 1]) : '';
      updateStackBlockSeatPreview(si);
    }
  }

  function readStackBlockNormalUrlsFromForm() {
    var out = [];
    for (var i = 1; i <= 6; i++) {
      var inp = el('stack-block-normal-url-' + i);
      out.push(inp && inp.value ? String(inp.value).trim() : '');
    }
    return out;
  }

  function readStackBlockHeavyUrlsFromForm() {
    var out = [];
    for (var j = 1; j <= 6; j++) {
      var inp = el('stack-block-heavy-url-' + j);
      out.push(inp && inp.value ? String(inp.value).trim() : '');
    }
    return out;
  }

  function updateStackBlockSeatPreview(seat) {
    ['normal', 'heavy'].forEach(function (kind) {
      var inp = el('stack-block-' + kind + '-url-' + seat);
      var img = el('stack-block-' + kind + '-prev-' + seat);
      if (!img) return;
      var v = inp && inp.value ? String(inp.value).trim() : '';
      if (!v) {
        img.removeAttribute('src');
        img.alt = '';
        return;
      }
      if (!/^https?:\/\//i.test(v) && v.charAt(0) !== '/') v = '/' + v.replace(/^\/+/, '');
      img.alt = (kind === 'heavy' ? 'Heavy ' : 'Normal ') + 'P' + seat;
      img.src = v;
    });
  }

  function bindStackBlockVisualInputs() {
    for (var s = 1; s <= 6; s++) {
      (function (seat) {
        var nIn = el('stack-block-normal-url-' + seat);
        var hIn = el('stack-block-heavy-url-' + seat);
        if (nIn) {
          nIn.addEventListener('change', function () { updateStackBlockSeatPreview(seat); });
          nIn.addEventListener('blur', function () { updateStackBlockSeatPreview(seat); });
        }
        if (hIn) {
          hIn.addEventListener('change', function () { updateStackBlockSeatPreview(seat); });
          hIn.addEventListener('blur', function () { updateStackBlockSeatPreview(seat); });
        }
        var bn = el('btn-stack-block-normal-clear-' + seat);
        if (bn) {
          bn.addEventListener('click', function () {
            var i = el('stack-block-normal-url-' + seat);
            if (i) i.value = '';
            updateStackBlockSeatPreview(seat);
          });
        }
        var bh = el('btn-stack-block-heavy-clear-' + seat);
        if (bh) {
          bh.addEventListener('click', function () {
            var i = el('stack-block-heavy-url-' + seat);
            if (i) i.value = '';
            updateStackBlockSeatPreview(seat);
          });
        }
      })(s);
    }
  }

  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 secIn = el('stack-tower-mission-sec') ? parseInt(String(el('stack-tower-mission-sec').value), 10) : 90;
    if (!Number.isFinite(secIn) || secIn < 10 || secIn > 7200) {
      setMsg('stack-game-msg', 'เวลารอบต้องอยู่ระหว่าง 10–7200 วินาที', 'error');
      return;
    }
    var missIn = el('stack-team-misses-max') ? parseInt(String(el('stack-team-misses-max').value), 10) : 3;
    if (!Number.isFinite(missIn) || missIn < 1 || missIn > 20) {
      setMsg('stack-game-msg', 'โอกาสพลาดต้องอยู่ระหว่าง 1–20 ครั้ง', 'error');
      return;
    }
    var progBlocksIn = el('stack-tower-progress-blocks') ? parseInt(String(el('stack-tower-progress-blocks').value), 10) : 50;
    if (!Number.isFinite(progBlocksIn) || progBlocksIn < 1 || progBlocksIn > 500) {
      setMsg('stack-game-msg', 'Progress เต็ม 100%: จำนวนชั้นต้องอยู่ระหว่าง 1–500', 'error');
      return;
    }
    var heavyPctIn = el('stack-heavy-block-percent') ? parseInt(String(el('stack-heavy-block-percent').value), 10) : 35;
    if (!Number.isFinite(heavyPctIn) || heavyPctIn < 0 || heavyPctIn > 100) {
      setMsg('stack-game-msg', 'โอกาสบล็อกใหญ่ (%) ต้องอยู่ระหว่าง 0–100', 'error');
      return;
    }
    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;
        data.stackTowerMissionTimeSec = secIn;
        data.stackTeamMissesMax = missIn;
        data.stackTowerProgressBlocks = progBlocksIn;
        data.stackHeavyBlockPercent = heavyPctIn;
        data.stackBlockNormalImageUrls = readStackBlockNormalUrlsFromForm();
        data.stackBlockHeavyImageUrls = readStackBlockHeavyUrlsFromForm();
        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)';
        var stf = fresh && fresh.stackTowerMissionTimeSec != null ? Number(fresh.stackTowerMissionTimeSec) : secIn;
        var msf = fresh && fresh.stackTeamMissesMax != null ? Number(fresh.stackTeamMissesMax) : missIn;
        var pbf = fresh && fresh.stackTowerProgressBlocks != null ? Number(fresh.stackTowerProgressBlocks) : progBlocksIn;
        setMsg('stack-game-msg', 'บันทึกสำเร็จ — สวิง ' + hz + ' Hz · กว้าง ' + wLabel + ' · เวลา ' + stf + 's · พลาด ' + msf + ' ครั้ง · Progress 100% ที่ ' + pbf + ' ชั้น · รูปบล็อก P1–P6 + ใหญ่ ' + (fresh && fresh.stackHeavyBlockPercent != null ? fresh.stackHeavyBlockPercent : heavyPctIn) + '% · 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();
        syncGameTimingLaserColorSwatches();
        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);
        }
        var inpT = el('jump-survive-mission-sec');
        if (inpT) {
          var jss = Number(data.jumpSurviveMissionTimeSec);
          inpT.value = String(Number.isFinite(jss) && jss > 0 ? Math.floor(jss) : 0);
        }
        setMsg('jump-survive-timing-msg', '', '');
      })
      .catch(function (e) {
        setMsg('jump-survive-timing-msg', e.message || 'โหลดไม่ได้', 'error');
      });
  }

  function updateSpaceShooterShipPreview(slot) {
    var img = el('space-shooter-ship-prev-' + slot);
    var inp = el('space-shooter-ship-url-' + slot);
    if (!img) return;
    var v = inp && inp.value ? String(inp.value).trim() : '';
    if (!v) {
      img.removeAttribute('src');
      img.alt = '';
      return;
    }
    if (!/^https?:\/\//i.test(v) && v.charAt(0) !== '/') v = '/' + v.replace(/^\/+/, '');
    img.alt = 'Ship slot ' + slot;
    img.src = v;
  }

  function bindSpaceShooterShipUrlInputs() {
    for (var s = 1; s <= 6; s++) {
      (function (slot) {
        var inp = el('space-shooter-ship-url-' + slot);
        var btn = el('btn-space-shooter-ship-clear-' + slot);
        if (inp) {
          inp.addEventListener('change', function () { updateSpaceShooterShipPreview(slot); });
          inp.addEventListener('blur', function () { updateSpaceShooterShipPreview(slot); });
        }
        if (btn) {
          btn.addEventListener('click', function () {
            var i = el('space-shooter-ship-url-' + slot);
            if (i) i.value = '';
            updateSpaceShooterShipPreview(slot);
          });
        }
      })(s);
    }
  }

  function readSpaceShooterShipImageUrlsFromForm() {
    var urls = [];
    for (var i = 1; i <= 6; i++) {
      var inp = el('space-shooter-ship-url-' + i);
      urls.push(inp && inp.value ? String(inp.value).trim() : '');
    }
    return urls;
  }

  function updateSpaceShooterDamageOverlayPreview(hit) {
    var img = el('space-shooter-damage-prev-' + hit);
    var inp = el('space-shooter-damage-url-' + hit);
    if (!img) return;
    var v = inp && inp.value ? String(inp.value).trim() : '';
    if (!v) {
      img.removeAttribute('src');
      img.alt = '';
      return;
    }
    if (!/^https?:\/\//i.test(v) && v.charAt(0) !== '/') v = '/' + v.replace(/^\/+/, '');
    img.alt = 'Damage overlay hit ' + hit;
    img.src = v;
  }

  function readSpaceShooterShipDamageOverlayUrlsFromForm() {
    var urls = [];
    for (var h = 1; h <= 3; h++) {
      var inp = el('space-shooter-damage-url-' + h);
      urls.push(inp && inp.value ? String(inp.value).trim() : '');
    }
    return urls;
  }

  function bindSpaceShooterDamageOverlayPanel() {
    for (var h = 1; h <= 3; h++) {
      (function (hit) {
        var inp = el('space-shooter-damage-url-' + hit);
        var btnClr = el('btn-space-shooter-damage-clear-' + hit);
        var btnUp = el('btn-space-shooter-damage-upload-' + hit);
        var fileInp = el('space-shooter-damage-file-' + hit);
        if (inp) {
          inp.addEventListener('change', function () { updateSpaceShooterDamageOverlayPreview(hit); });
          inp.addEventListener('blur', function () { updateSpaceShooterDamageOverlayPreview(hit); });
        }
        if (btnClr) {
          btnClr.addEventListener('click', function () {
            var i = el('space-shooter-damage-url-' + hit);
            if (i) i.value = '';
            if (fileInp) fileInp.value = '';
            updateSpaceShooterDamageOverlayPreview(hit);
          });
        }
        if (btnUp && fileInp) {
          btnUp.addEventListener('click', function () {
            if (!fileInp.files || !fileInp.files[0]) {
              setMsg('space-shooter-timing-msg', 'เลือกไฟล์รูปก่อน · Pick an image file first', 'error');
              return;
            }
            readFileAsDataURL(fileInp.files[0])
              .then(function (dataUrl) {
                return gauntletAssetsJsonFetch(GAME_GAUNTLET_ASSETS_API + '/upload', {
                  method: 'POST',
                  headers: { 'Content-Type': 'application/json' },
                  body: JSON.stringify({
                    imageDataUrl: dataUrl,
                    label: 'space-shooter-damage-hit-' + hit,
                  }),
                });
              })
              .then(function (j) {
                if (!j || !j.ok || !j.url) {
                  throw new Error((j && j.error) || 'อัปโหลดไม่สำเร็จ · Upload failed');
                }
                var inpU = el('space-shooter-damage-url-' + hit);
                if (inpU) inpU.value = String(j.url).trim();
                updateSpaceShooterDamageOverlayPreview(hit);
                setMsg(
                  'space-shooter-timing-msg',
                  'อัปโหลด overlay ช่อง ' + hit + ' แล้ว — กดบันทึกด้านล่างเพื่อเก็บลง game-timing.json · Uploaded; click Save',
                  'ok'
                );
              })
              .catch(function (e) {
                setMsg('space-shooter-timing-msg', e.message || 'อัปโหลดไม่สำเร็จ', 'error');
              });
          });
        }
      })(h);
    }
  }

  function updateSpaceShooterAstFallPreview() {
    var img = el('space-shooter-ast-fall-prev');
    var inp = el('space-shooter-ast-fall-url');
    if (!img) return;
    var v = inp && inp.value ? String(inp.value).trim() : '';
    if (!v) {
      img.removeAttribute('src');
      img.alt = '';
      return;
    }
    if (!/^https?:\/\//i.test(v) && v.charAt(0) !== '/') v = '/' + v.replace(/^\/+/, '');
    img.alt = 'Asteroid falling';
    img.src = v;
  }

  function updateSpaceShooterAstExplodeRowPreview(row) {
    if (!row) return;
    var img = row.querySelector('.space-shooter-ast-explode-prev');
    var inp = row.querySelector('.space-shooter-ast-explode-url');
    if (!img) return;
    var v = inp && inp.value ? String(inp.value).trim() : '';
    if (!v) {
      img.removeAttribute('src');
      img.alt = '';
      return;
    }
    if (!/^https?:\/\//i.test(v) && v.charAt(0) !== '/') v = '/' + v.replace(/^\/+/, '');
    img.alt = 'Asteroid explode frame';
    img.src = v;
  }

  function renumberSpaceShooterAstExplodeRows() {
    var wrap = el('space-shooter-ast-explode-rows');
    if (!wrap) return;
    var rows = wrap.querySelectorAll('.space-shooter-ast-explode-row');
    rows.forEach(function (row, i) {
      var slot = row.querySelector('.space-shooter-ship-slot');
      if (slot) slot.textContent = String(i + 1);
    });
  }

  function addSpaceShooterAstExplodeRow(initialUrl) {
    var wrap = el('space-shooter-ast-explode-rows');
    if (!wrap) return;
    var rows = wrap.querySelectorAll('.space-shooter-ast-explode-row');
    if (rows.length >= 31) {
      setMsg('space-shooter-timing-msg', 'เฟรมแตกสูงสุด 31 แถว (รวมรูปตกแล้วไม่เกิน 32 URL) · Max 31 explosion rows', 'error');
      return;
    }
    var ix = rows.length + 1;
    var row = document.createElement('div');
    row.className = 'space-shooter-ship-row space-shooter-ast-explode-row';
    row.innerHTML =
      '<span class="space-shooter-ship-slot space-shooter-ship-slot--ast">' +
      ix +
      '</span><label class="space-shooter-ship-url-label">URL <input type="text" class="space-shooter-ast-explode-url" maxlength="500" spellcheck="false" placeholder="/Game/img/gauntlet-assets/....png" autocomplete="off"></label>' +
      '<input type="file" class="space-shooter-ast-explode-file space-shooter-damage-file" accept="image/png,image/webp,image/jpeg,image/gif">' +
      '<button type="button" class="btn btn-ghost btn-space-shooter-ast-explode-upload">อัปโหลด</button>' +
      '<img class="space-shooter-ship-prev space-shooter-damage-prev space-shooter-ast-explode-prev" alt="" width="56" height="56" decoding="async">' +
      '<button type="button" class="btn btn-ghost btn-space-shooter-ast-explode-clear">ล้าง</button>' +
      '<button type="button" class="btn btn-ghost btn-space-shooter-ast-explode-remove">ลบแถว</button>';
    var inp = row.querySelector('.space-shooter-ast-explode-url');
    if (inp && initialUrl != null && String(initialUrl).trim()) inp.value = String(initialUrl).trim();
    if (inp) {
      inp.addEventListener('change', function () {
        updateSpaceShooterAstExplodeRowPreview(row);
      });
      inp.addEventListener('blur', function () {
        updateSpaceShooterAstExplodeRowPreview(row);
      });
    }
    wrap.appendChild(row);
    updateSpaceShooterAstExplodeRowPreview(row);
  }

  function clearSpaceShooterAstExplodeRows() {
    var wrap = el('space-shooter-ast-explode-rows');
    if (wrap) wrap.innerHTML = '';
  }

  function readSpaceShooterAsteroidSpriteUrlsFromForm() {
    var out = [];
    var fallInp = el('space-shooter-ast-fall-url');
    var fall = fallInp && fallInp.value ? String(fallInp.value).trim() : '';
    if (fall) out.push(fall);
    var wrap = el('space-shooter-ast-explode-rows');
    if (wrap) {
      var rows = wrap.querySelectorAll('.space-shooter-ast-explode-row');
      for (var ri = 0; ri < rows.length && out.length < 32; ri++) {
        var inp = rows[ri].querySelector('.space-shooter-ast-explode-url');
        var u = inp && inp.value ? String(inp.value).trim() : '';
        if (u) out.push(u);
      }
    }
    return out;
  }

  function bindSpaceShooterAsteroidSpritePanel() {
    var wrap = el('space-shooter-ast-explode-rows');
    if (!wrap || wrap.getAttribute('data-bound') === '1') return;
    wrap.setAttribute('data-bound', '1');
    wrap.addEventListener('click', function (ev) {
      var t = ev.target;
      if (!t || !t.closest) return;
      var rm = t.closest('.btn-space-shooter-ast-explode-remove');
      if (rm) {
        var row = rm.closest('.space-shooter-ast-explode-row');
        if (row && row.parentNode) row.parentNode.removeChild(row);
        renumberSpaceShooterAstExplodeRows();
        return;
      }
      var clr = t.closest('.btn-space-shooter-ast-explode-clear');
      if (clr) {
        var rowC = clr.closest('.space-shooter-ast-explode-row');
        if (!rowC) return;
        var iu = rowC.querySelector('.space-shooter-ast-explode-url');
        var fi = rowC.querySelector('.space-shooter-ast-explode-file');
        if (iu) iu.value = '';
        if (fi) fi.value = '';
        updateSpaceShooterAstExplodeRowPreview(rowC);
        return;
      }
      var up = t.closest('.btn-space-shooter-ast-explode-upload');
      if (!up) return;
      var rowU = up.closest('.space-shooter-ast-explode-row');
      if (!rowU) return;
      var fileInp = rowU.querySelector('.space-shooter-ast-explode-file');
      if (!fileInp || !fileInp.files || !fileInp.files[0]) {
        setMsg('space-shooter-timing-msg', 'เลือกไฟล์รูปก่อน · Pick an image file first', 'error');
        return;
      }
      readFileAsDataURL(fileInp.files[0])
        .then(function (dataUrl) {
          return gauntletAssetsJsonFetch(GAME_GAUNTLET_ASSETS_API + '/upload', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({
              imageDataUrl: dataUrl,
              label: 'space-shooter-ast-explode',
            }),
          });
        })
        .then(function (j) {
          if (!j || !j.ok || !j.url) {
            throw new Error((j && j.error) || 'อัปโหลดไม่สำเร็จ · Upload failed');
          }
          var inpU = rowU.querySelector('.space-shooter-ast-explode-url');
          if (inpU) inpU.value = String(j.url).trim();
          updateSpaceShooterAstExplodeRowPreview(rowU);
          setMsg(
            'space-shooter-timing-msg',
            'อัปโหลดเฟรมแตกแล้ว — กดบันทึกด้านล่างเพื่อเก็บ · Uploaded; click Save',
            'ok'
          );
        })
        .catch(function (e) {
          setMsg('space-shooter-timing-msg', e.message || 'อัปโหลดไม่สำเร็จ', 'error');
        });
    });
    var btnAdd = el('btn-space-shooter-ast-add-explode');
    if (btnAdd) {
      btnAdd.addEventListener('click', function () {
        setMsg('space-shooter-timing-msg', '', '');
        addSpaceShooterAstExplodeRow('');
      });
    }
    var fallInp = el('space-shooter-ast-fall-url');
    var fallFile = el('space-shooter-ast-fall-file');
    var fallUp = el('btn-space-shooter-ast-fall-upload');
    var fallClr = el('btn-space-shooter-ast-fall-clear');
    if (fallInp) {
      fallInp.addEventListener('change', updateSpaceShooterAstFallPreview);
      fallInp.addEventListener('blur', updateSpaceShooterAstFallPreview);
    }
    if (fallClr) {
      fallClr.addEventListener('click', function () {
        if (fallInp) fallInp.value = '';
        if (fallFile) fallFile.value = '';
        updateSpaceShooterAstFallPreview();
      });
    }
    if (fallUp && fallFile) {
      fallUp.addEventListener('click', function () {
        if (!fallFile.files || !fallFile.files[0]) {
          setMsg('space-shooter-timing-msg', 'เลือกไฟล์รูปก่อน · Pick an image file first', 'error');
          return;
        }
        readFileAsDataURL(fallFile.files[0])
          .then(function (dataUrl) {
            return gauntletAssetsJsonFetch(GAME_GAUNTLET_ASSETS_API + '/upload', {
              method: 'POST',
              headers: { 'Content-Type': 'application/json' },
              body: JSON.stringify({
                imageDataUrl: dataUrl,
                label: 'space-shooter-ast-fall',
              }),
            });
          })
          .then(function (j) {
            if (!j || !j.ok || !j.url) {
              throw new Error((j && j.error) || 'อัปโหลดไม่สำเร็จ · Upload failed');
            }
            if (fallInp) fallInp.value = String(j.url).trim();
            updateSpaceShooterAstFallPreview();
            setMsg(
              'space-shooter-timing-msg',
              'อัปโหลดรูปตกแล้ว — กดบันทึกด้านล่างเพื่อเก็บ · Uploaded; click Save',
              'ok'
            );
          })
          .catch(function (e) {
            setMsg('space-shooter-timing-msg', e.message || 'อัปโหลดไม่สำเร็จ', 'error');
          });
      });
    }
  }

  function loadSpaceShooterTimingPanel() {
    gameTimingFetch('GET')
      .then(function (data) {
        var inpT = el('space-shooter-mission-sec');
        if (inpT) {
          var ss = Number(data.spaceShooterMissionTimeSec);
          inpT.value = String(Number.isFinite(ss) && ss > 0 ? Math.floor(ss) : 0);
        }
        var inpIv = el('space-shooter-asteroid-interval-ms');
        if (inpIv) {
          var iv = Number(data.spaceShooterAsteroidIntervalMs);
          inpIv.value = String(Number.isFinite(iv) && iv >= 200 ? Math.min(10000, Math.floor(iv)) : 1040);
        }
        var urls = data.spaceShooterShipImageUrls;
        if (!Array.isArray(urls)) urls = [];
        for (var k = 1; k <= 6; k++) {
          var inpU = el('space-shooter-ship-url-' + k);
          if (inpU) inpU.value = urls[k - 1] != null ? String(urls[k - 1]) : '';
          updateSpaceShooterShipPreview(k);
        }
        var fallInpL = el('space-shooter-ast-fall-url');
        if (fallInpL) {
          var astArr = data.spaceShooterAsteroidSpriteUrls;
          if (!Array.isArray(astArr)) astArr = [];
          fallInpL.value = astArr[0] != null ? String(astArr[0]) : '';
          updateSpaceShooterAstFallPreview();
          clearSpaceShooterAstExplodeRows();
          for (var ai = 1; ai < astArr.length && ai < 32; ai++) {
            addSpaceShooterAstExplodeRow(astArr[ai]);
          }
        }
        var inpFms = el('space-shooter-asteroid-explode-ms');
        if (inpFms) {
          var ef = Number(data.spaceShooterAsteroidExplodeFrameMs);
          inpFms.value = String(Number.isFinite(ef) ? Math.max(30, Math.min(500, Math.round(ef))) : 70);
        }
        var dmg = data.spaceShooterShipDamageOverlayUrls;
        if (!Array.isArray(dmg)) dmg = [];
        for (var dh = 1; dh <= 3; dh++) {
          var inpD = el('space-shooter-damage-url-' + dh);
          if (inpD) inpD.value = dmg[dh - 1] != null ? String(dmg[dh - 1]) : '';
          updateSpaceShooterDamageOverlayPreview(dh);
        }
        setMsg('space-shooter-timing-msg', '', '');
      })
      .catch(function (e) {
        setMsg('space-shooter-timing-msg', e.message || 'โหลดไม่ได้', 'error');
      });
  }

  function saveSpaceShooterTimingPanel() {
    var limSs = el('space-shooter-mission-sec') ? parseInt(String(el('space-shooter-mission-sec').value), 10) : 0;
    if (Number.isNaN(limSs) || limSs < 0) limSs = 0;
    limSs = limSs <= 0 ? 0 : Math.max(10, Math.min(7200, limSs));
    var shipUrls = readSpaceShooterShipImageUrlsFromForm();
    var damageUrls = readSpaceShooterShipDamageOverlayUrlsFromForm();
    var astUrls = readSpaceShooterAsteroidSpriteUrlsFromForm();
    var inpFms = el('space-shooter-asteroid-explode-ms');
    var explodeMs = inpFms ? parseInt(String(inpFms.value), 10) : 70;
    if (Number.isNaN(explodeMs)) explodeMs = 70;
    explodeMs = Math.max(30, Math.min(500, explodeMs));
    var inpIv = el('space-shooter-asteroid-interval-ms');
    var asteroidIv = inpIv ? parseInt(String(inpIv.value), 10) : 1040;
    if (Number.isNaN(asteroidIv)) asteroidIv = 1040;
    asteroidIv = Math.max(200, Math.min(10000, asteroidIv));
    gameTimingFetch('GET')
      .then(function (data) {
        data.spaceShooterMissionTimeSec = limSs;
        data.spaceShooterShipImageUrls = shipUrls;
        data.spaceShooterShipDamageOverlayUrls = damageUrls;
        data.spaceShooterAsteroidSpriteUrls = astUrls;
        data.spaceShooterAsteroidExplodeFrameMs = explodeMs;
        data.spaceShooterAsteroidIntervalMs = asteroidIv;
        return gameTimingFetch('PUT', data);
      })
      .then(function () {
        setMsg('space-shooter-timing-msg', 'บันทึกแล้ว — เวลา / ความถี่เกิดอุกาบาต / รูปยาน / overlay / อุกาบาต มีผลเมื่อรีเฟรชหน้าเล่นหรือโหลด /api/game-timing', 'ok');
      })
      .catch(function (e) {
        setMsg('space-shooter-timing-msg', e.message || 'บันทึกไม่ได้', 'error');
      });
  }

  function encodeSpacesInUrlPath(t) {
    var s = String(t || '');
    var q = s.indexOf('?');
    var pathPart = q === -1 ? s : s.slice(0, q);
    var query = q === -1 ? '' : s.slice(q);
    return pathPart.replace(/ /g, '%20') + query;
  }

  function decodeAssetUrlPercentRuns(t) {
    var s = String(t || '');
    var q = s.indexOf('?');
    var base = q === -1 ? s : s.slice(0, q);
    var query = q === -1 ? '' : s.slice(q);
    for (var i = 0; i < 2; i++) {
      try {
        var d = decodeURIComponent(base);
        if (d === base) break;
        base = d;
      } catch (e) {
        break;
      }
    }
    return base + query;
  }

  function normalizeGameAssetUrlForWebAdmin(t) {
    var s = String(t || '');
    s = s.replace(/^\/Game\/public\/img\//i, '/Game/img/');
    s = s.replace(/^Game\/public\/img\//i, 'Game/img/');
    return s;
  }

  /** ให้สอดคล้องกับ server sanitizeGauntletAssetUrl + กัน placeholder .... */
  function normalizeMegaVirusAssetUrl(v) {
    var t = v != null ? normalizeGameAssetUrlForWebAdmin(decodeAssetUrlPercentRuns(String(v).trim())).replace(/\/+$/, '') : '';
    if (!t || t.length > 500) return '';
    if (/\.{4,}/.test(t)) return '';
    if (/[\t\n\r<>"'`]/.test(t)) return '';
    if (/^https?:\/\//i.test(t)) return encodeSpacesInUrlPath(t);
    if (/^Game\//i.test(t)) return encodeSpacesInUrlPath('/' + t.replace(/^\/+/, ''));
    if (t.charAt(0) === '/') return encodeSpacesInUrlPath(t);
    return '';
  }

  function updateMegaVirusBossPreview() {
    var img = el('mega-virus-boss-prev');
    var inp = el('mega-virus-boss-url');
    if (!img) return;
    var v = normalizeMegaVirusAssetUrl(inp && inp.value ? String(inp.value).trim() : '');
    if (!v) {
      img.removeAttribute('src');
      img.alt = '';
      return;
    }
    img.alt = 'Boss preview';
    img.src = v;
  }

  function updateMegaVirusBalloonPreview(slot) {
    var img = el('mega-virus-balloon-prev-' + slot);
    var inp = el('mega-virus-balloon-url-' + slot);
    if (!img) return;
    var v = normalizeMegaVirusAssetUrl(inp && inp.value ? String(inp.value).trim() : '');
    if (!v) {
      img.removeAttribute('src');
      img.alt = '';
      return;
    }
    img.alt = 'Balloon P' + slot;
    img.src = v;
  }

  function updateMegaVirusBalloonFallbackPreview() {
    var img = el('mega-virus-balloon-fallback-prev');
    var inp = el('mega-virus-balloon-fallback-url');
    if (!img) return;
    var v = normalizeMegaVirusAssetUrl(inp && inp.value ? String(inp.value).trim() : '');
    if (!v) {
      img.removeAttribute('src');
      img.alt = '';
      return;
    }
    img.alt = 'Fallback balloon';
    img.src = v;
  }

  function readMegaVirusBalloonUrlsFromForm() {
    var urls = [];
    for (var i = 1; i <= 6; i++) {
      var inp = el('mega-virus-balloon-url-' + i);
      urls.push(normalizeMegaVirusAssetUrl(inp && inp.value ? String(inp.value).trim() : ''));
    }
    return urls;
  }

  function bindMegaVirusPanel() {
    var formMv = el('form-mega-virus-timing');
    if (formMv) {
      formMv.addEventListener('submit', function (e) {
        e.preventDefault();
        saveMegaVirusTimingPanel();
      });
    }
    var bossInp = el('mega-virus-boss-url');
    if (bossInp) {
      bossInp.addEventListener('change', updateMegaVirusBossPreview);
      bossInp.addEventListener('blur', updateMegaVirusBossPreview);
    }
    var bossClr = el('btn-mega-virus-boss-clear');
    if (bossClr) {
      bossClr.addEventListener('click', function () {
        var i = el('mega-virus-boss-url');
        if (i) i.value = '';
        updateMegaVirusBossPreview();
      });
    }
    for (var s = 1; s <= 6; s++) {
      (function (slot) {
        var inp = el('mega-virus-balloon-url-' + slot);
        var btn = el('btn-mega-virus-balloon-clear-' + slot);
        if (inp) {
          inp.addEventListener('change', function () { updateMegaVirusBalloonPreview(slot); });
          inp.addEventListener('blur', function () { updateMegaVirusBalloonPreview(slot); });
        }
        if (btn) {
          btn.addEventListener('click', function () {
            var i = el('mega-virus-balloon-url-' + slot);
            if (i) i.value = '';
            updateMegaVirusBalloonPreview(slot);
          });
        }
      })(s);
    }
    var fbInp = el('mega-virus-balloon-fallback-url');
    if (fbInp) {
      fbInp.addEventListener('change', updateMegaVirusBalloonFallbackPreview);
      fbInp.addEventListener('blur', updateMegaVirusBalloonFallbackPreview);
    }
    var fbClr = el('btn-mega-virus-balloon-fallback-clear');
    if (fbClr) {
      fbClr.addEventListener('click', function () {
        var i = el('mega-virus-balloon-fallback-url');
        if (i) i.value = '';
        updateMegaVirusBalloonFallbackPreview();
      });
    }
  }

  function applyMegaVirusPanelFromTimingData(data) {
    if (!data || typeof data !== 'object') return;
    var inpT = el('mega-virus-mission-sec');
    if (inpT && Object.prototype.hasOwnProperty.call(data, 'balloonBossMissionTimeSec')) {
      var bb = Number(data.balloonBossMissionTimeSec);
      inpT.value = String(Number.isFinite(bb) && bb > 0 ? Math.floor(bb) : 0);
    }
    var bossInp = el('mega-virus-boss-url');
    if (bossInp && Object.prototype.hasOwnProperty.call(data, 'balloonBossBossImageUrl')) {
      bossInp.value = data.balloonBossBossImageUrl != null ? String(data.balloonBossBossImageUrl) : '';
      updateMegaVirusBossPreview();
    }
    if (Array.isArray(data.balloonBossPlayerBalloonImageUrls)) {
      var urls = data.balloonBossPlayerBalloonImageUrls;
      for (var k = 1; k <= 6; k++) {
        var inpU = el('mega-virus-balloon-url-' + k);
        if (inpU) inpU.value = urls[k - 1] != null ? String(urls[k - 1]) : '';
        updateMegaVirusBalloonPreview(k);
      }
    }
    var fb = el('mega-virus-balloon-fallback-url');
    if (fb && Object.prototype.hasOwnProperty.call(data, 'balloonBossPlayerBalloonFallbackUrl')) {
      fb.value = data.balloonBossPlayerBalloonFallbackUrl != null ? String(data.balloonBossPlayerBalloonFallbackUrl) : '';
      updateMegaVirusBalloonFallbackPreview();
    }
  }

  function loadMegaVirusPanel() {
    gameTimingFetch('GET')
      .then(function (data) {
        applyMegaVirusPanelFromTimingData(data);
        setMsg('mega-virus-timing-msg', '', '');
      })
      .catch(function (e) {
        setMsg('mega-virus-timing-msg', e.message || 'โหลดไม่ได้', 'error');
      });
  }

  function saveMegaVirusTimingPanel() {
    if (megaVirusSaveInFlight) return;
    megaVirusSaveInFlight = true;
    var btn = el('btn-mega-virus-save');
    if (btn) btn.disabled = true;
    var limSs = el('mega-virus-mission-sec') ? parseInt(String(el('mega-virus-mission-sec').value), 10) : 0;
    if (Number.isNaN(limSs) || limSs < 0) limSs = 0;
    limSs = limSs <= 0 ? 0 : Math.max(10, Math.min(7200, limSs));
    var bossUrl = normalizeMegaVirusAssetUrl(el('mega-virus-boss-url') && el('mega-virus-boss-url').value ? String(el('mega-virus-boss-url').value).trim() : '');
    var balloonUrls = readMegaVirusBalloonUrlsFromForm();
    var fbUrl = normalizeMegaVirusAssetUrl(el('mega-virus-balloon-fallback-url') && el('mega-virus-balloon-fallback-url').value
      ? String(el('mega-virus-balloon-fallback-url').value).trim()
      : '');
    gameTimingFetch('GET')
      .then(function (data) {
        data.balloonBossMissionTimeSec = limSs;
        data.balloonBossBossImageUrl = bossUrl;
        data.balloonBossPlayerBalloonImageUrls = balloonUrls;
        data.balloonBossPlayerBalloonFallbackUrl = fbUrl;
        return gameTimingFetch('PUT', data);
      })
      .then(function (res) {
        if (res && typeof res === 'object') applyMegaVirusPanelFromTimingData(res);
        setMsg('mega-virus-timing-msg', 'บันทึกแล้ว — รีเฟรชหน้าเล่น (หรือเปิดใหม่) เพื่อโหลดรูป · Saved; hard-refresh play.', 'ok');
      })
      .catch(function (e) {
        setMsg('mega-virus-timing-msg', e.message || 'บันทึกไม่ได้', 'error');
      })
      .then(function () {
        megaVirusSaveInFlight = false;
        if (btn) btn.disabled = false;
      });
  }

  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;
    var limJump = el('jump-survive-mission-sec') ? parseInt(String(el('jump-survive-mission-sec').value), 10) : 0;
    if (Number.isNaN(limJump) || limJump < 0) limJump = 0;
    limJump = limJump <= 0 ? 0 : Math.max(10, Math.min(7200, limJump));
    gameTimingFetch('GET')
      .then(function (data) {
        data.jumpSurviveJumpHeightMult = jumpSurvMult;
        data.jumpSurviveMissionTimeSec = limJump;
        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 · Minigame-5 / Minigame-6 ตั้งแท็บของแต่ละเกม · ค่า Tower block (Stack) แก้ที่แท็บ Minigame-3 เท่านั้น · จำกัดเวลาพรมแดงใช้กับรอบถัดไปที่โฮสต์เริ่มเกม', '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 === 'space-shooter') loadSpaceShooterTimingPanel();
    if (name === 'mega-virus') loadMegaVirusPanel();
    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 btnSpaceShooterSave = el('btn-space-shooter-save');
  if (btnSpaceShooterSave) {
    btnSpaceShooterSave.addEventListener('click', saveSpaceShooterTimingPanel);
  }
  bindSpaceShooterShipUrlInputs();
  bindStackBlockVisualInputs();
  bindSpaceShooterDamageOverlayPanel();
  bindSpaceShooterAsteroidSpritePanel();
  bindMegaVirusPanel();
  var btnStackGameSave = el('btn-stack-game-save');
  if (btnStackGameSave) {
    btnStackGameSave.addEventListener('click', saveStackGamePanel);
  }
  bindGauntletAssetLibrary();
  bindGameTimingAssignedVisuals();
  bindGameTimingLaserColorSwatches();

  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);
  wireQuizCarryPlaqueMapScaleControls();
  quizCarryBindThemePickersOnce();

  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, 'space-shooter': true, 'mega-virus': 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);
  });
})();