/* ============================================================
 * 云村小助手 - 站点账号系统前端逻辑（按次计费版）
 * 未经授权不得复制、修改或用于商业用途
 * ============================================================ */
(function () {
    'use strict';

    /* Promise.finally 老内核 polyfill（与 index.html 同一份标准实现——
       index.html 的脚本先加载，这里再兜底一次确保独立引用时也安全） */
    if (!Promise.prototype.finally) {
        Promise.prototype.finally = function (cb) {
            var P = this.constructor || Promise;
            return this.then(
                function (v) { return P.resolve(cb()).then(function () { return v; }); },
                function (e) { return P.resolve(cb()).then(function () { throw e; }); }
            );
        };
    }

    var SITE_VERSION = '2.4.0';   // 与后端 APP_VERSION、index.html CHANGELOG 对齐
    var CHANGELOG = [
        { v: '2.4.0', date: '2026-09-21', items: ['修复：老内核浏览器（Chrome 57-62）操作按钮卡加载的问题', '安全：登录失败次数过多临时锁定；公网错误信息不再暴露内部细节', '优化：用户列表不再携带明文网易云 Cookie（按需单独查看）'] },
        { v: '2.1.0', date: '2026-08-28', items: ['计费改为按次计费：一首歌 1 次，歌单打包按歌曲数量扣减', '免费试用改为 3 次（3 首歌），注册页领取，每设备限一次', '卡密系统升级为次数卡，后台可管理用户次数'] },
        { v: '2.0.0', date: '2026-08-28', items: ['新增站点账号系统：强制登录、邮箱验证码注册', '新增管理后台：用户管理、全局Cookie、SMTP、日志、卡密、公告、数据库备份', '新增个人中心：剩余次数、卡密充值、公告查看'] },
        { v: '1.2.0', date: '2026-03-29', items: ['修复部分歌曲解析失败的问题', '优化界面交互体验'] }
    ];

    function $(s, root) { return (root || document).querySelector(s); }
    function $$(s, root) { return Array.prototype.slice.call((root || document).querySelectorAll(s)); }

    /* ---------------- toast ---------------- */
    var toastWrap = null;
    function toast(msg, type) {
        if (!toastWrap) {
            toastWrap = document.createElement('div');
            toastWrap.style.cssText = 'position:fixed;top:18px;left:50%;transform:translateX(-50%);z-index:99999;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none;';
            document.body.appendChild(toastWrap);
        }
        var t = document.createElement('div');
        t.textContent = msg;
        t.style.cssText = 'padding:10px 18px;border-radius:10px;font-size:13px;color:#fff;background:' +
            (type === 'error' ? 'linear-gradient(135deg,#ff5f57,#e0483f)' :
                type === 'success' ? 'linear-gradient(135deg,#34c759,#2aa64c)' : 'rgba(30,30,30,.92)') +
            ';box-shadow:0 6px 24px rgba(0,0,0,.25);opacity:0;transform:translateY(-8px);transition:all .25s;max-width:80vw;';
        toastWrap.appendChild(t);
        requestAnimationFrame(function () { t.style.opacity = '1'; t.style.transform = 'translateY(0)'; });
        setTimeout(function () {
            t.style.opacity = '0'; t.style.transform = 'translateY(-8px)';
            setTimeout(function () { t.remove(); }, 300);
        }, 2600);
    }

    /* ---------------- 请求 ---------------- */
    function api(url, params) {
        var body = Object.keys(params || {}).map(function (k) {
            return encodeURIComponent(k) + '=' + encodeURIComponent(params[k] == null ? '' : params[k]);
        }).join('&');
        // 30 秒超时：服务端挂起时不再无限等待（登录含省份查询约 5s 上限，留足余量；
        // 无 AbortController 的老内核优雅降级为无超时）
        var ctl = (typeof AbortController !== 'undefined') ? new AbortController() : null;
        var timer = null;
        if (ctl) timer = setTimeout(function () { try { ctl.abort(); } catch (e) {} }, 30000);
        return fetch(url, {
            method: 'POST',
            headers: { 'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8' },
            body: body,
            credentials: 'same-origin',
            signal: ctl ? ctl.signal : undefined
        }).then(function (r) {
            // 双回调解包（不用 Promise.finally：兼容 Chromium 57+ 老内核）
            return r.json().then(function (d) { if (timer) clearTimeout(timer); return d; },
                                  function (e) { if (timer) clearTimeout(timer); throw e; });
        }).catch(function () {
            // 默认失败兜底——网络断/超时/非 JSON 响应不再产生 unhandledrejection
            // 噪音（喂 fe_error 上报通道），统一转为标准失败对象走调用方既有的 toast
            if (timer) clearTimeout(timer);
            return { status: 0, success: false, message: '网络异常，请检查连接后重试' };
        });
    }
    function apiGet(url) {
        var ctl = (typeof AbortController !== 'undefined') ? new AbortController() : null;
        var timer = null;
        if (ctl) timer = setTimeout(function () { try { ctl.abort(); } catch (e) {} }, 15000);
        // 注意：apiGet 不做默认失败兜底——/auth/me 的调用方依赖"失败保持原登录态"
        //（拒绝会跳过 then 体，不清空已有 user），转成 resolved 失败对象会让 UI 掉成游客
        return fetch(url, { credentials: 'same-origin', signal: ctl ? ctl.signal : undefined })
            .then(function (r) {
                return r.json().then(function (d) { if (timer) clearTimeout(timer); return d; },
                                      function (e) { if (timer) clearTimeout(timer); throw e; });
            });
    }

/* ---------------- 设备标识 ---------------- */
function getDeviceId() {
    /* 与 index.html 的 getDeviceId 统一为同一键/同一值——
       注册指纹与下载任务/心跳的设备号不再各走一套；
       内存缓存兜底 localStorage 不可写时同一页面内保持稳定。 */
    if (window.__siteDeviceIdCache) return window.__siteDeviceIdCache;
    var KEY = 'netease_device_id';
    var d = '';
    try { d = localStorage.getItem(KEY) || ''; } catch (e) { }
    if (!d) {
        d = 'dev-' + Date.now().toString(36) + '-' + Math.random().toString(36).slice(2, 10);
        try { localStorage.setItem(KEY, d); } catch (e) { }
    }
    window.__siteDeviceIdCache = d;
    return d;
}

    /* ---------------- 状态 ---------------- */
    var user = null;
    var durationText = '';
    var ann = null;
    var smtpOk = false;   // fail-closed——/auth/me 返回前不显示注册入口（防止未配置 SMTP 的窗口期误开）
    var registerCredits = 3;   // 注册赠送次数由 /auth/me 下发，文案不再硬编码

    /* ---------------- 弹窗 ---------------- */
    function openModal(id) { var m = $('#' + id); if (m) m.classList.add('show'); }
    function closeModal(id) { var m = $('#' + id); if (m) m.classList.remove('show'); }

    /* ---------------- 导航栏 ---------------- */
    function renderAuthArea() {
        // 同步全局登录状态，供主脚本 requireLogin() 使用
        window.SITE_LOGGED_IN = !!user;
        // 未开放邮箱注册（SMTP 未配置）时，隐藏所有注册入口，避免用户注册卡死
        var showRegister = !user && smtpOk;
        var regBtn = $('#btn-open-register');
        if (regBtn) regBtn.hidden = !showRegister;
        ['goto-register', 'goto-register2'].forEach(function (id) {
            var a = $('#' + id); if (a) a.hidden = !showRegister;
        });
        // 两个弹窗（登录/注册）里的试用提示都要受管——原 querySelector 只命中第一个
        $$('.auth-trial-box').forEach(function (box) { box.hidden = !showRegister; });
        $$('.reg-gift-num').forEach(function (el) { el.textContent = registerCredits; });
        var guest = $('#auth-guest-area'), uarea = $('#auth-user-area');
        if (guest && uarea) {
            if (user) {
                guest.hidden = true; uarea.hidden = false;
                var pill = $('#auth-duration-pill');
                if (pill) pill.textContent = '⏳ ' + (durationText || '0 次');
                var av = $('#user-avatar');
                if (av) {
                    av.textContent = (user.username || 'U').charAt(0).toUpperCase();
                    av.title = user.username + (user.role === 'admin' ? '（管理员）' : '');
                }
            } else {
                guest.hidden = false; uarea.hidden = true;
            }
        }
        var ucTab = $('#tab-usercenter'), uaTab = $('#tab-useradmin');
        if (ucTab) ucTab.hidden = !user;
        if (uaTab) uaTab.hidden = !(user && user.role === 'admin');
        // 全局账号歌单仅管理员可见
        var gTab = $('#tab-global');
        if (gTab) gTab.hidden = !(user && user.role === 'admin');
    }

    /* ---------------- 会话 ---------------- */
    function refreshSession() {
        return apiGet('/auth/me').then(function (data) {
            var d = data.data || {};
            user = d.user || null;
            durationText = d.duration_text || '';
            ann = d.announcement || null;
            smtpOk = !!d.smtp_configured;
            // 注册赠送次数动态下发（/auth/me），文案不再硬编码
            if (typeof d.register_credits === 'number') registerCredits = d.register_credits;
            renderAuthArea();
            renderUserCenter();
            maybeShowAnnouncement();
            // 确认登录后再恢复下载任务（游客调任务接口会 401 误弹登录框）
            if (user && typeof window.SITE_TASKS_BOOTSTRAP === 'function') {
                try { window.SITE_TASKS_BOOTSTRAP(); } catch (e) {}
            }
            return user;
        }).catch(function () { return null; });
    }

    // 全局暴露给主脚本 apiPost 的 401 统一处理（同一提示 5 秒内不重复弹出）
    var _lastAuthToast = 0;
    function authToastOnce(msg, type) {
        var now = Date.now();
        if (now - _lastAuthToast < 5000) return;
        _lastAuthToast = now;
        toast(msg, type || 'error');
    }
    window.handleAuthExpired = function (msg, expired) {
        if (expired) {
            authToastOnce(msg || '下载次数已用尽，请充值卡密');
            showExpiredModal();
            return;
        }
        // 会话失效时清掉内存里的旧用户状态再引导登录
        //（原实现保留旧 user，页面继续显示"已登录"却处处 401）
        user = null;
        durationText = '';
        renderAuthArea();
        renderUserCenter();
        authToastOnce(msg || '登录已失效，请重新登录');
        // 登录弹窗已打开且正处于找回/两步验证视图时，不复位视图——
        // 未登录期间后台任务轮询/心跳会持续吃 401 反复进入本函数，若每次都把
        // 弹窗拽回登录视图，管理员正在输入的验证码会被打断、票据被清空
        var _lm = document.getElementById('login-modal');
        var _fv = document.getElementById('forgot-view');
        var _a2v = document.getElementById('admin2fa-view');
        var _authViewOpen = _lm && _lm.classList.contains('show') &&
            ((_fv && !_fv.hidden) || (_a2v && !_a2v.hidden));
        if (!_authViewOpen) {
            hideForgotView();
            hideAdmin2faView();
        }
        // 会话失效弹登录窗前，先关掉可能叠开的注册弹窗（双遮罩错乱），
        // 已 show 则短路——401 风暴（1.5s 轮询）期间不反复重开
        var _reg = document.getElementById('register-modal');
        if (_reg && _reg.classList.contains('show')) closeModal('register-modal');
        if (_lm && _lm.classList.contains('show')) return;
        openModal('login-modal');
    };
    // 暴露给主脚本：扣费/任务结束后刷新顶栏剩余次数与登录态
    window.refreshSITECredits = refreshSession;
    window.renderSITEUserCenter = renderUserCenter;
    // 暴露当前剩余下载次数给主脚本预检（未登录 -1，不限 999999）
    window.getSITECredits = function () {
        if (!user) return -1;
        var c = (typeof user.duration_seconds === 'number') ? user.duration_seconds : 0;
        return c < 0 ? 999999 : c;
    };

    /* 次数用尽弹窗（下载触发，带「去充值」入口） */
    function showExpiredModal() {
        // 先移除可能残留的旧实例（此前被 Escape 隐藏但未删 DOM 时，旧实现会直接
        // return，导致该弹窗从此再也弹不出来）
        var old = $('#site-expired-modal');
        if (old) old.remove();
        var mask = document.createElement('div');
        mask.className = 'modal-mask show';
        mask.id = 'site-expired-modal';
        mask.setAttribute('data-dynamic', '1');   // Escape 关闭时连同 DOM 一并移除
        mask.innerHTML =
            '<div class="modal" style="width:380px;">' +
            '  <div class="modal-header"><div class="modal-title">⏳ 下载次数已用尽</div></div>' +
            '  <div class="modal-body" style="font-size:13px;line-height:1.9;">' +
            '    您的下载次数已用完。解析与在线试听免费，<b>下载需要消耗次数</b>（一首歌 = 1 次，歌单打包按歌曲数量扣减）。<br>' +
            '    <span style="opacity:.7;">请在个人中心充值卡密后继续下载。</span>' +
            '  </div>' +
            '  <div style="display:flex;gap:10px;padding:0 22px 20px;">' +
            '    <button class="btn btn-primary" id="site-expired-go" type="button" style="flex:1;">去充值</button>' +
            '    <button class="btn" id="site-expired-close" type="button" style="flex:1;">关闭</button>' +
            '  </div>' +
            '</div>';
        document.body.appendChild(mask);
        mask.addEventListener('click', function (e) { if (e.target === mask) mask.remove(); });
        var go = $('#site-expired-go'), close = $('#site-expired-close');
        if (go) go.addEventListener('click', function () {
            mask.remove();
            var t = $('#tab-usercenter');
            if (t) t.click();
        });
        if (close) close.addEventListener('click', function () { mask.remove(); });
    }

    function afterAuth(data) {
        var d = data.data || {};
        user = d.user || null;
        durationText = d.duration_text || '';
        renderAuthArea();
        renderUserCenter();
        // 登录成功后立即恢复本设备的进行中任务
        if (user && typeof window.SITE_TASKS_BOOTSTRAP === 'function') {
            try { window.SITE_TASKS_BOOTSTRAP(); } catch (e) {}
        }
    }

    /* ---------------- 登录 / 注册弹窗 ---------------- */
    // 注册唯一入口——导航按钮与登录弹窗两处链接（全站仅有的 3 条打开
    // 路径）统一经此：未同意协议 → cookieGate('register') 弹「隐私与协议设置」
        // 注册模式（16 秒强制阅读计时）并中止；已同意 → 直接进注册弹窗。
    // 提交侧 doRegister 另有 fail-closed 兜底闸，程序化打开也绕不过。
    function openRegisterFlow() {
        closeModal('login-modal');   // 先关登录弹窗，避免协议窗被压在下方
        var gate = window.SITE_COOKIE_GATE;
        if (typeof gate !== 'function') {
            // fail-closed：协议闸未就绪（主脚本异常）时不放行注册
            toast('页面协议组件未就绪，请刷新页面后重试', 'error');
            return;
        }
        if (!gate('register')) return;   // 未同意：闸内已弹协议窗并提示
        openModal('register-modal');
    }
    function bindAuthModal() {
        var lo = $('#btn-open-login'), ro = $('#btn-open-register');
        if (lo) lo.addEventListener('click', function () { closeModal('register-modal'); hideForgotView(); hideAdmin2faView(); openModal('login-modal'); });
        if (ro) ro.addEventListener('click', function () { closeModal('login-modal'); openRegisterFlow(); });
        ['login-close', 'register-close', 'announce-close'].forEach(function (id) {
            var b = $('#' + id);
            if (b) b.addEventListener('click', function () {
                if (id.indexOf('login') === 0 && window.resetAuthViews) window.resetAuthViews();   // 关闭侧复位
                closeModal(id.indexOf('login') === 0 ? 'login-modal' : id.indexOf('register') === 0 ? 'register-modal' : 'announce-modal');
            });
        });
        [['login-modal', 'login-close'], ['register-modal', 'register-close']].forEach(function (p) {
            var m = $('#' + p[0]);
            if (m) m.addEventListener('click', function (e) {
                if (e.target === m) {
                    if (p[0] === 'login-modal' && window.resetAuthViews) window.resetAuthViews();   // 关闭侧复位
                    closeModal(p[0]);
                }
            });
        });
        var g1 = $('#goto-register'), g2 = $('#goto-register2');
        if (g1) g1.addEventListener('click', function () { closeModal('login-modal'); openRegisterFlow(); });
        if (g2) g2.addEventListener('click', function () { closeModal('login-modal'); openRegisterFlow(); });
        var gl1 = $('#goto-login');
        if (gl1) gl1.addEventListener('click', function () { closeModal('register-modal'); hideForgotView(); hideAdmin2faView(); openModal('login-modal'); });
        // 找回密码入口/返回（只交付 DOM 漏了绑定）
        var gf = $('#goto-forgot');
        if (gf) gf.addEventListener('click', showForgotView);
        var fbl = $('#forgot-back-login');
        if (fbl) fbl.addEventListener('click', hideForgotView);
        // 管理员两步验证视图的返回链接
        var a2b = $('#a2fa-back');
        if (a2b) a2b.addEventListener('click', hideAdmin2faView);

        // 注册即送 3 次，无需 Tab 切换
    }

    /* ---------------- 登录 ---------------- */
    function doLogin() {
        var btn = $('#login-submit');
        var username = ($('#login-username') || {}).value || '';
        var password = ($('#login-password') || {}).value || '';
        if (!username || !password) { toast('请输入用户名/邮箱和密码', 'error'); return; }
        btn.disabled = true; btn.textContent = '登录中...';
        api('/auth/login', { username: username, password: password })
            .then(function (data) {
                if (data.status !== 200) throw new Error(data.message || '登录失败');
                // 管理员密码验证通过——转两步验证视图（服务端未建会话）
                if (data.data && data.data.admin_2fa) {
                    showAdmin2faView(data.data.ticket, data.data.email_masked);
                    toast('密码验证通过，请完成邮箱验证', 'success');
                    return;
                }
                afterAuth(data);
                closeModal('login-modal');
                toast('登录成功，欢迎回来，' + (user ? user.username : ''), 'success');
                if (data.data && data.data.redirect === 'admin') {
                    var uaTab = $('#tab-useradmin');
                    if (uaTab) uaTab.click();
                } else {
                    var ucTab = $('#tab-usercenter');
                    if (ucTab) ucTab.click();
                }
            })
            .catch(function (e) { toast(e.message || '登录失败', 'error'); })
            .finally(function () { btn.disabled = false; btn.textContent = '登 录'; });
    }

    /* ---------------- 注册 ---------------- */
    var _REG_EMAIL_RE = /^[\w.%+-]+@[\w.-]+\.[A-Za-z]{2,}$/;
    var _REG_NAME_RE = /^[A-Za-z0-9_\u4e00-\u9fa5]{3,20}$/;
    // 注册弹窗内常驻错误行（长文案 2.6s toast 看不完）
    function regShowError(msg) {
        toast(msg, 'error');
        var line = $('#reg-error-line');
        if (line) { line.textContent = msg; line.hidden = false; }
    }
    function regClearError() {
        var line = $('#reg-error-line');
        if (line) { line.textContent = ''; line.hidden = true; }
    }
    function sendCode() {
        var btn = $('#reg-send-code');
        var email = ($('#reg-email') || {}).value || '';
        if (!_REG_EMAIL_RE.test(email.trim())) { toast('邮箱格式不正确', 'error'); return; }
        regClearError();
        btn.disabled = true; btn.textContent = '发送中...';
        api('/auth/send_code', { email: email, purpose: 'register' })
            .then(function (data) {
                if (data.status !== 200) throw new Error(data.message || '发送失败');
                toast('验证码已发送，请查收邮箱', 'success');
                var left = 60;
                window.__regCodeTimer = setInterval(function () {
                    left--; btn.textContent = left + 's';
                    if (left <= 0) { clearInterval(window.__regCodeTimer); btn.textContent = '发送验证码'; btn.disabled = false; }
                }, 1000);
            })
            .catch(function (e) {
                toast(e.message || '发送失败', 'error');
                btn.disabled = false; btn.textContent = '发送验证码';
            });
    }

    /* ---------------- 找回密码 ---------------- */
    // 只交付了找回视图 DOM 未实现 JS——此处补齐全链路。
    // 后端 /auth/forgot_password 已就绪：验证码原子消费、防枚举
    // 统一文案、login_seq 踢全会话、5 次/分/IP 限流；发码复用 /auth/send_code。
    function forgotShowError(msg) {
        toast(msg, 'error');
        var line = $('#forgot-error-line');
        if (line) { line.textContent = msg; line.hidden = false; }
    }
    function forgotClearError() {
        var line = $('#forgot-error-line');
        if (line) { line.textContent = ''; line.hidden = true; }
    }
    function forgotStopCodeTimer() {
        clearInterval(window.__forgotCodeTimer || 0);
        var btn = $('#forgot-send-code');
        if (btn && btn.disabled) { btn.disabled = false; btn.textContent = '发送验证码'; }
    }
    function showForgotView() {
        var form = document.querySelector('#login-modal .auth-form');
        var fv = $('#forgot-view');
        if (!form || !fv) return;
        form.classList.add('forgot-mode');
        fv.hidden = false;
        forgotClearError();
        var em = $('#forgot-email');
        if (em) { try { em.focus(); } catch (e) {} }
    }
    function hideForgotView() {
        var form = document.querySelector('#login-modal .auth-form');
        var fv = $('#forgot-view');
        if (form) form.classList.remove('forgot-mode');
        if (fv && !fv.hidden) fv.hidden = true;
        forgotClearError();
        forgotStopCodeTimer();
    }
    function doForgotSendCode() {
        var btn = $('#forgot-send-code');
        var email = ($('#forgot-email') || {}).value || '';
        if (!_REG_EMAIL_RE.test(email.trim())) { forgotShowError('邮箱格式不正确'); return; }
        forgotClearError();
        btn.disabled = true; btn.textContent = '发送中...';
        api('/auth/send_code', { email: email, purpose: 'reset' })
            .then(function (data) {
                if (data.status !== 200) throw new Error(data.message || '发送失败');
                toast('验证码已发送，请查收邮箱', 'success');
                var left = 60;
                window.__forgotCodeTimer = setInterval(function () {
                    left--; btn.textContent = left + 's';
                    if (left <= 0) { clearInterval(window.__forgotCodeTimer); btn.textContent = '发送验证码'; btn.disabled = false; }
                }, 1000);
            })
            .catch(function (e) {
                forgotShowError(e.message || '发送失败');
                btn.disabled = false; btn.textContent = '发送验证码';
            });
    }
    function doForgotReset() {
        var btn = $('#forgot-submit');
        var email = ($('#forgot-email') || {}).value || '';
        var code = ($('#forgot-code') || {}).value || '';
        var password = ($('#forgot-password') || {}).value || '';
        forgotClearError();
        if (!email || !code || !password) { forgotShowError('请填写完整找回信息'); return; }
        if (!_REG_EMAIL_RE.test(email.trim())) { forgotShowError('邮箱格式不正确'); return; }
        if (password.length < 8 || password.length > 128) { forgotShowError('新密码长度需在 8-128 位之间'); return; }
        btn.disabled = true; btn.textContent = '重置中...';
        api('/auth/forgot_password', { email: email, code: code, password: password })
            .then(function (data) {
                if (data.status !== 200) throw new Error(data.message || '重置失败');
                var fe = $('#forgot-email'), fc = $('#forgot-code'), fp = $('#forgot-password');
                if (fe) fe.value = ''; if (fc) fc.value = ''; if (fp) fp.value = '';
                forgotStopCodeTimer();
                hideForgotView();
                toast('密码已重置，请用新密码登录', 'success');
            })
            .catch(function (e) { forgotShowError(e.message || '重置失败'); })
            .finally(function () { btn.disabled = false; btn.textContent = '重置密码'; });
    }

    /* ---------------- 管理员两步验证 ----------------
     * Step1 用户名+密码 → 服务端签发票据（不建会话）；本视图完成
     * Step2 绑定邮箱比对（触发发码）与 Step3 验证码登录。普通用户不经过此流程。 */
    var _a2faTicket = '';
    function a2faShowError(msg) {
        toast(msg, 'error');
        var line = $('#a2fa-error-line');
        if (line) { line.textContent = msg; line.hidden = false; }
    }
    function a2faClearError() {
        var line = $('#a2fa-error-line');
        if (line) { line.textContent = ''; line.hidden = true; }
    }
    function a2faStopTimer() {
        clearInterval(window.__a2faTimer || 0);
        var btn = $('#a2fa-send');
        if (btn && btn.disabled) { btn.disabled = false; btn.textContent = '发送验证码'; }
    }
    function showAdmin2faView(ticket, emailMask) {
        var form = document.querySelector('#login-modal .auth-form');
        var v = $('#admin2fa-view');
        if (!form || !v) return;
        _a2faTicket = ticket || '';
        var mask = $('#a2fa-email-mask');
        if (mask) mask.textContent = emailMask || '-';
        // 清掉上次会话残留的输入（错码/旧邮箱不再被原样重复提交）
        var ae = $('#a2fa-email'), ac = $('#a2fa-code');
        if (ae) ae.value = '';
        if (ac) ac.value = '';
        form.classList.add('admin2fa-mode');
        v.hidden = false;
        a2faClearError();
        a2faStopTimer();
        var em = $('#a2fa-email');
        if (em) { try { em.focus(); } catch (e) {} }
    }
    function hideAdmin2faView() {
        var form = document.querySelector('#login-modal .auth-form');
        var v = $('#admin2fa-view');
        if (form) form.classList.remove('admin2fa-mode');
        if (v && !v.hidden) v.hidden = true;
        _a2faTicket = '';
        a2faClearError();
        a2faStopTimer();
    }
    // 关闭侧统一复位——登录弹窗的 X/遮罩/Escape/doLogout 关闭路径都调用，
    // 不再只依赖"打开侧纪律"；同时供 index.html 的 Escape 通用分支使用
    window.resetAuthViews = function () { hideForgotView(); hideAdmin2faView(); };
    function doA2faSendCode() {
        var btn = $('#a2fa-send');
        var email = ($('#a2fa-email') || {}).value || '';
        if (!email.trim()) { a2faShowError('请输入管理员绑定邮箱'); return; }
        a2faClearError();
        btn.disabled = true; btn.textContent = '发送中...';
        api('/auth/admin_login/email', { ticket: _a2faTicket, email: email })
            .then(function (data) {
                if (data.status === 401) {
                    // 先复位视图再提示——错误行随视图隐藏，此处 toast 是唯一可达提示
                    hideAdmin2faView();
                    a2faShowError(data.message || '请重新登录');
                    return;
                }
                if (data.status !== 200) throw new Error(data.message || '发送失败');
                toast('验证码已发送至管理员邮箱，请查收', 'success');
                var ci = $('#a2fa-code');
                if (ci) { try { ci.focus(); } catch (e) {} }
                var left = 60;
                window.__a2faTimer = setInterval(function () {
                    left--; btn.textContent = left + 's';
                    if (left <= 0) { clearInterval(window.__a2faTimer); btn.textContent = '发送验证码'; btn.disabled = false; }
                }, 1000);
            })
            .catch(function (e) {
                a2faShowError(e.message || '发送失败');
                btn.disabled = false; btn.textContent = '发送验证码';
            });
    }
    function doA2faVerify() {
        var btn = $('#a2fa-submit');
        var email = ($('#a2fa-email') || {}).value || '';
        var code = ($('#a2fa-code') || {}).value || '';
        a2faClearError();
        if (!email.trim()) { a2faShowError('请输入管理员绑定邮箱'); return; }
        if (!code.trim()) { a2faShowError('请先获取并输入邮箱验证码'); return; }
        btn.disabled = true; btn.textContent = '验证中...';
        api('/auth/admin_login/verify', { ticket: _a2faTicket, code: code })
            .then(function (data) {
                if (data.status === 401) {
                    // 先复位视图再提示（同上，错误行随视图隐藏）
                    hideAdmin2faView();
                    a2faShowError(data.message || '请重新登录');
                    return;
                }
                if (data.status !== 200) throw new Error(data.message || '验证失败');
                a2faClearError();
                afterAuth(data);
                closeModal('login-modal');
                toast('登录成功，欢迎回来，' + (user ? user.username : ''), 'success');
                var uaTab = $('#tab-useradmin');
                if (uaTab) uaTab.click();
            })
            .catch(function (e) { a2faShowError(e.message || '验证失败'); })
            .finally(function () { btn.disabled = false; btn.textContent = '验证并登录'; });
    }

    function doRegister() {
        var btn = $('#reg-submit');
        var username = ($('#reg-username') || {}).value || '';
        var password = ($('#reg-password') || {}).value || '';
        var email = ($('#reg-email') || {}).value || '';
        var code = ($('#reg-code') || {}).value || '';
        regClearError();
        // 提交侧兜底闸（入口已统一走 openRegisterFlow，此处防任何程序化
        // 打开路径绕过）。fail-closed：协议闸缺失视为未同意。注册语境只查协议同意
        // （功能性 Cookie 不拦注册，拦解析/下载时另有提示）；未同意时闸内已自动
        // 弹「隐私与协议设置」注册模式并 toast，此处不再重复提示
        if (typeof window.SITE_COOKIE_GATE !== 'function') {
            toast('页面协议组件未就绪，请刷新页面后重试', 'error');
            return;
        }
        if (!window.SITE_COOKIE_GATE('register')) return;
        // 前端即时校验（口径与后端一致，省一次网络往返）
        if (!username || !password || !email || !code) { regShowError('请填写完整注册信息'); return; }
        if (!_REG_NAME_RE.test(username)) { regShowError('用户名需 3-20 位，仅支持中文、字母、数字、下划线，且不能纯下划线'); return; }
        if (!_REG_EMAIL_RE.test(email.trim())) { regShowError('邮箱格式不正确'); return; }
        if (password.length < 8 || password.length > 128) { regShowError('密码长度需在 8-128 位之间'); return; }
        btn.disabled = true; btn.textContent = '注册中...';
        api('/auth/register', {
            username: username, password: password, email: email, code: code,
            device_id: getDeviceId(), agree: 1
        })
            .then(function (data) {
                if (data.status !== 200) throw new Error(data.message || '注册失败');
                regClearError();
                afterAuth(data);
                closeModal('register-modal');
                toast('注册成功，已自动登录，赠送的下载次数可在个人中心查看', 'success');
                var ucTab = $('#tab-usercenter');
                if (ucTab) ucTab.click();
            })
            .catch(function (e) { regShowError(e.message || '注册失败'); })
            .finally(function () { btn.disabled = false; btn.textContent = '注 册'; });
    }

    /* ---------------- 退出登录 ---------------- */
    function doLogout() {
        api('/auth/logout', {}).then(function () {
            user = null; durationText = '';
            renderAuthArea();
            renderUserCenter();   // 同步个人中心 gate/content 显隐，与其他登出路径一致
            if (window.resetAuthViews) window.resetAuthViews();   // 登出复位登录弹窗视图
            closeModal('register-modal'); closeModal('login-modal');
            // 退出连带清除个人网易云登录（index.html 注册的钩子：
            // 清 localStorage 的个人 Cookie/解析账号选择并复位账号栏）
            if (typeof window.SITE_ON_LOGOUT === 'function') {
                try { window.SITE_ON_LOGOUT(); } catch (e) {}
            }
            var ex = $('#site-expired-modal'); if (ex) ex.remove();
            // 切回搜索页，避免停留在个人中心 / 管理后台 / 管理员歌单
            var search = document.querySelector('.tab[data-tab="search"]') || $('#tab-search');
            if (search) search.click();
            toast('已退出登录', 'success');
        });
    }

    /* ---------------- 个人中心 ---------------- */
    function fmtTime(ts) {
        if (!ts) return '-';
        var d = new Date(ts * 1000);
        return d.getFullYear() + '-' + String(d.getMonth() + 1).padStart(2, '0') + '-' +
            String(d.getDate()).padStart(2, '0');
    }

    function renderUserCenter() {
        var el;
        // 登录态切换：隐藏 🔒 占位、显示个人中心内容
        var gate = $('#uc-gate'), content = $('#uc-content');
        if (gate && content) {
            gate.hidden = !!user;
            content.hidden = !user;
        }
        if (!user) return;
        if ((el = $('#uc-avatar'))) el.textContent = (user.username || 'U').charAt(0).toUpperCase();
        if ((el = $('#uc-username'))) el.textContent = user ? user.username : '-';
        if ((el = $('#uc-role'))) el.textContent = user ? (user.role === 'admin' ? '管理员 · 不限次数'
            : (typeof user.duration_seconds === 'number' && user.duration_seconds < 0 ? 'VIP · 不限次数' : '普通用户')) : '-';
        if ((el = $('#uc-duration'))) el.textContent = user ? (durationText || '0 次') : '-';
        if ((el = $('#uc-email'))) el.textContent = (user && user.email) || '未绑定';
        if ((el = $('#uc-created'))) el.textContent = user ? fmtTime(user.created_at) : '-';
        var cl = $('#uc-changelog');
        if (cl) {
            cl.innerHTML = CHANGELOG.map(function (v) {
                return '<div style="margin-bottom:10px;"><b>v' + v.v + '</b> <span style="opacity:.6;font-size:12px;">' +
                    v.date + '</span><div style="font-size:12px;opacity:.85;line-height:1.7;">' +
                    v.items.map(function (i) { return '· ' + i; }).join('<br>') + '</div></div>';
            }).join('') + '<div style="opacity:.6;font-size:12px;">当前版本 v' + SITE_VERSION +
                '</div>';
        }
    }

    function doRedeem() {
        var input = $('#uc-card-input');
        var code = (input && input.value || '').trim();
        if (!code) { toast('请输入卡密', 'error'); return; }
        var btn = $('#uc-card-redeem');
        btn.disabled = true;
        api('/auth/redeem', { code: code })
            .then(function (data) {
                if (data.status !== 200) throw new Error(data.message || '兑换失败');
                durationText = (data.data && data.data.duration_text) || durationText;
                // 同步更新内存余额（批量下载预检读的是 user.duration_seconds，
                // 原实现只改显示文字，预检仍用充值前的旧值）
                if (user && data.data && typeof data.data.duration_seconds === 'number') {
                    user.duration_seconds = data.data.duration_seconds;
                    return null;
                }
                return refreshSession();
            })
            .then(function () {
                renderAuthArea(); renderUserCenter();
                if (input) input.value = '';
                toast('充值成功', 'success');
            })
            .catch(function (e) { toast(e.message || '兑换失败', 'error'); })
            .finally(function () { btn.disabled = false; });
    }


    /* ---------------- 公告 ---------------- */
    function maybeShowAnnouncement(force) {
        // 手动"查看公告"（force=true）无条件展示；
        // 自动弹出仍按 popup_mode 与 once 已读版本判断
        if (!force && (!ann || !ann.content || ann.popup_mode === 'off')) return;
        if (!force && ann && ann.popup_mode === 'once') {
            // once 模式的已读判断：登录用户比对服务端 ann_seen；
            // 游客比对本地 localStorage（原实现只查 user，游客每次刷新都重复弹窗）
            if (user && user.ann_seen && String(user.ann_seen) === String(ann.updated_at)) return;
            if (!user) {
                var guestSeen = '';
                try { guestSeen = localStorage.getItem('netease_ann_once_seen') || ''; } catch (e) {}
                if (guestSeen === String(ann.updated_at)) return;
            }
        }
        if (!ann || !ann.content) { toast('当前没有公告内容', 'info'); return; }
        var t = $('#announce-title'), c = $('#announce-content');
        if (t) t.textContent = ann.title || '系统公告';
        if (c) c.innerHTML = String(ann.content).split('\n').map(function (l) { return escapeHtml(l); }).join('<br>');
        // 首访 Cookie 协议窗显示中不叠加公告弹窗（双遮罩错乱）；
        // 跳过时不记已读，下次进入页面再弹
        var _cm = document.getElementById('cookie-modal');
        if (_cm && _cm.classList.contains('show')) return;
        openModal('announce-modal');
        if (user) api('/auth/ann_seen', {});
        else { try { localStorage.setItem('netease_ann_once_seen', String(ann.updated_at)); } catch (e) {} }
    }

    function escapeHtml(s) {
        return String(s == null ? '' : s).replace(/[&<>"']/g, function (c) {
            return { '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;' }[c];
        });
    }

    /* ---------------- 管理后台 ---------------- */
    var uaLoaded = false;
    var uaLogsType = 'success';

    function uaShowGate() {
        var gate = $('#ua-gate'), content = $('#ua-content');
        if (!gate || !content) return;
        var isAdmin = !!(user && user.role === 'admin');
        gate.hidden = isAdmin;
        content.hidden = !isAdmin;
        if (isAdmin && !uaLoaded) { uaLoaded = true; uaLoadUsers(); uaLoadCookieStatus(); uaLoadSmtp(); uaLoadLogs(); uaLoadCards(); uaLoadAnn(); uaLoadDb(); }
    }

    function uaBindSide() {
        $$('#admin-side .admin-side-item[data-view]').forEach(function (item) {
            // 侧栏项补键盘语义（同型——tabindex/role + Enter/空格激活）
            item.setAttribute('tabindex', '0');
            item.setAttribute('role', 'button');
            item.addEventListener('click', function () {
                $$('#admin-side .admin-side-item').forEach(function (i) { i.classList.remove('active'); });
                item.classList.add('active');
                $$('.admin-view').forEach(function (v) { v.classList.toggle('active', v.getAttribute('data-aview') === item.getAttribute('data-view')); });
            });
            item.addEventListener('keydown', function (e) {
                if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); item.click(); }
            });
        });
        var back = $('#ua-back');
        if (back) back.addEventListener('click', function () {
            var t = $('#tab-useradmin'); if (t) t.classList.remove('active');
            var search = document.querySelector('.tab[data-tab="search"]');
            if (search) search.click();
        });
        var lo = $('#ua-logout');
        if (lo) lo.addEventListener('click', doLogout);
        // 返回/退出两个无 data-view 的侧栏项同样补键盘语义
        [back, lo].forEach(function (el) {
            if (!el) return;
            el.setAttribute('tabindex', '0');
            el.setAttribute('role', 'button');
            el.addEventListener('keydown', function (e) {
                if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); el.click(); }
            });
        });
        /* ---- 播放 API 密钥 ---- */
        var pkShow = $('#ua-playkey-show');
        var pkInput = $('#ua-playkey-value');
        function pkCopyToClipboard(text) {
            if (navigator.clipboard && navigator.clipboard.writeText) {
                navigator.clipboard.writeText(text).then(function () { toast('密钥已复制', 'success'); },
                    function () { toast('复制失败，请手动选择文本复制', 'error'); });
            } else {
                toast('复制失败，请点击「显示密钥」后手动复制', 'error');
            }
        }
        if (pkShow) pkShow.addEventListener('click', function () {
            if (pkShow.dataset.state === 'shown') {
                pkInput.value = '';
                pkInput.placeholder = '点击「显示密钥」查看';
                pkShow.textContent = '显示密钥';
                pkShow.dataset.state = '';
                return;
            }
            api('/admin/site/play_key/get', {}).then(function (d) {
                if (d.status !== 200) { toast(d.message || '获取失败', 'error'); return; }
                pkInput.value = d.data.key;
                pkShow.textContent = '隐藏';
                pkShow.dataset.state = 'shown';
            });
        });
        var pkCopy = $('#ua-playkey-copy');
        if (pkCopy) pkCopy.addEventListener('click', function () {
            api('/admin/site/play_key/get', {}).then(function (d) {
                if (d.status !== 200) { toast(d.message || '获取失败', 'error'); return; }
                pkCopyToClipboard(d.data.key);
            });
        });
        var pkRotate = $('#ua-playkey-rotate');
        if (pkRotate) pkRotate.addEventListener('click', function () {
            if (!confirm('刷新后旧密钥立即全部失效（外部旧地址将打不开），确定继续？')) return;
            api('/admin/site/play_key/rotate', {}).then(function (d) {
                if (d.status !== 200) { toast(d.message || '刷新失败', 'error'); return; }
                pkInput.value = d.data.key;
                pkShow.textContent = '隐藏';
                pkShow.dataset.state = 'shown';
                toast('密钥已刷新，旧密钥已全部失效', 'success');
            });
        });
    }

    /* ---- 用户管理 ---- */
    function uaInjectUserToolbar() {
        var refresh = $('#ua-users-refresh');
        if (!refresh || $('#ua-user-create')) return;
        var btn = document.createElement('button');
        btn.className = 'btn btn-sm btn-primary';
        btn.id = 'ua-user-create';
        btn.type = 'button';
        btn.textContent = '➕ 添加用户';
        btn.addEventListener('click', uaCreateUserModal);
        refresh.parentNode.insertBefore(btn, refresh);
    }

    function uaCreateUserModal() {
        var old = $('#site-create-user-modal');
        if (old) old.remove();
        var mask = document.createElement('div');
        mask.className = 'modal-mask show';
        mask.id = 'site-create-user-modal';
        mask.setAttribute('data-dynamic', '1');   // Escape 关闭时连同 DOM 一并移除
        mask.innerHTML =
            '<div class="modal" style="width:400px;">' +
            '  <div class="modal-header"><div class="modal-title">➕ 添加用户</div></div>' +
            '  <div class="modal-body">' +
            '    <input class="input" id="cnu-username" placeholder="用户名（3-20位）" style="width:100%;margin-bottom:10px;"/>' +
            '    <input class="input" id="cnu-password" placeholder="初始密码（至少8位）" style="width:100%;margin-bottom:10px;"/>' +
            '    <input class="input" id="cnu-email" placeholder="邮箱（可选）" style="width:100%;margin-bottom:10px;"/>' +
            '    <input class="input" id="cnu-count" type="number" min="0" value="10" placeholder="下载次数" style="width:100%;"/>' +
            '  </div>' +
            '  <div style="display:flex;gap:10px;padding:0 22px 20px;">' +
            '    <button class="btn btn-primary" id="cnu-submit" type="button" style="flex:1;">创 建</button>' +
            '    <button class="btn" id="cnu-cancel" type="button" style="flex:1;">取消</button>' +
            '  </div>' +
            '</div>';
        document.body.appendChild(mask);
        mask.addEventListener('click', function (e) { if (e.target === mask) mask.remove(); });
        var cancel = $('#cnu-cancel');
        if (cancel) cancel.addEventListener('click', function () { mask.remove(); });
        var submit = $('#cnu-submit');
        if (submit) submit.addEventListener('click', function () {
            var body = {
                username: ($('#cnu-username') || {}).value || '',
                password: ($('#cnu-password') || {}).value || '',
                email: ($('#cnu-email') || {}).value || '',
                count: ($('#cnu-count') || {}).value || 0
            };
            if (!body.username || body.password.length < 8) { toast('请填写用户名和至少 8 位密码', 'error'); return; }
            submit.disabled = true;
            api('/admin/site/user/create', body).then(function (d) {
                toast(d.message || (d.status === 200 ? '创建成功' : '创建失败'), d.status === 200 ? 'success' : 'error');
                if (d.status === 200) { mask.remove(); uaLoadUsers(); }
            }).finally(function () { submit.disabled = false; });
        });
    }

    function uaLoadUsers() {
        uaInjectUserToolbar();
        api('/admin/site/users', {}).then(function (data) {
            var body = $('#ua-users-body');
            if (!body) return;
            if (data.status !== 200) { body.innerHTML = '<tr><td colspan="8">' + escapeHtml(data.message || '加载失败') + '</td></tr>'; return; }
            var users = (data.data && data.data.users) || [];
            var cnt = $('#ua-users-count');
            if (cnt) cnt.textContent = users.length;
            if (!users.length) { body.innerHTML = '<tr><td colspan="8">暂无用户</td></tr>'; return; }
            body.innerHTML = users.map(function (u) {
                var isAdmin = u.role === 'admin';
                var disabled = (u.status === 0);
                var banned = (u.status === 2);
                // 数值字段同过转义（纵深防御——后端口径若变为字符串
                // 不再形成管理后台存储型 XSS 面，与同表 username/email 口径对齐）
                var uid = escapeHtml(String(u.id));
                var dur = escapeHtml(String(u.duration_seconds));
                var cred = u.duration_seconds < 0 ? '不限' : (dur + ' 次');
                var dev = [u.register_ip, u.trial_device].filter(Boolean).join(' · ') || '-';   // IP 优先显示
                if (u.last_province) dev += ' · ' + u.last_province;
                return '<tr' + ((disabled || banned) ? ' style="opacity:.55;"' : '') + '>' +
                    '<td>' + uid + '</td>' +
                    '<td>' + escapeHtml(u.username) +
                    (banned ? ' <span class="tag-pill" style="background:#8a1f1f;color:#fff;font-size:11px;">已封禁</span>' : '') +
                    (disabled ? ' <span class="tag-pill" style="background:var(--color-error,#e0483f);color:#fff;font-size:11px;">已禁用</span>' : '') + '</td>' +
                    '<td>' + escapeHtml(u.email || '-') + '</td>' +
                    '<td>' + (isAdmin ? '管理员' : '用户') + '</td>' +
                    '<td>' + cred + '</td>' +
                    '<td style="max-width:140px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;" title="' + escapeHtml(dev) + '">' + escapeHtml(dev) + '</td>' +
                    '<td><button class="btn btn-sm" data-ucookie="' + escapeHtml(u.username) + '">' + (u.has_netease_cookie ? '查看' : '无') + '</button></td>' +
                    '<td>' +
                    '<button class="btn btn-sm" data-uedit="' + uid + '" data-cur="' + dur + '">改次数</button> ' +
                    (isAdmin ? '<button class="btn btn-sm" data-uself="' + uid + '">改自己密码</button>' :
                        '<button class="btn btn-sm" data-upwd="' + uid + '" data-name="' + escapeHtml(u.username) + '">重置密码</button> ' +
                        '<button class="btn btn-sm" data-utoggle="' + uid + '">' + (disabled ? '启用' : '禁用') + '</button> ' +
                        '<button class="btn btn-sm" data-uban="' + uid + '" data-name="' + escapeHtml(u.username) + '">' + (banned ? '解封' : '封禁') + '</button> ' +
                        '<button class="btn btn-sm" data-udel="' + uid + '" data-name="' + escapeHtml(u.username) + '" style="color:var(--color-error);">删除</button>') +
                    '</td></tr>';
            }).join('');
            $$('[data-uedit]', body).forEach(function (b) {
                b.addEventListener('click', function () {
                    var v = prompt('设置该用户的剩余次数（-1 表示不限）：', b.getAttribute('data-cur'));
                    if (v === null) return;
                    api('/admin/site/user/duration', { id: b.getAttribute('data-uedit'), count: v })
                        .then(function (d) { toast(d.message || (d.status === 200 ? '已修改' : '修改失败'), d.status === 200 ? 'success' : 'error'); if (d.status === 200) uaLoadUsers(); });
                });
            });
            // 管理员自助改密（需验证旧密码；改完其他设备全部下线）
            $$('[data-uself]', body).forEach(function (b) {
                b.addEventListener('click', function () {
                    var oldpwd = prompt('请输入当前密码：', '');
                    if (oldpwd === null) return;
                    var newpwd = prompt('请输入新密码（至少 8 位）：', '');
                    if (newpwd === null) return;
                    api('/admin/site/user/reset_password', {
                        id: b.getAttribute('data-uself'), password: newpwd, old_password: oldpwd
                    }).then(function (d) {
                        toast(d.message || (d.status === 200 ? '密码已修改' : '修改失败'), d.status === 200 ? 'success' : 'error');
                    });
                });
            });
            $$('[data-upwd]', body).forEach(function (b) {
                b.addEventListener('click', function () {
                    var v = prompt('为用户「' + b.getAttribute('data-name') + '」设置新密码（至少 8 位）：', '');
                    if (v === null) return;
                    api('/admin/site/user/reset_password', { id: b.getAttribute('data-upwd'), password: v })
                        .then(function (d) { toast(d.message || (d.status === 200 ? '已重置' : '重置失败'), d.status === 200 ? 'success' : 'error'); });
                });
            });
            $$('[data-utoggle]', body).forEach(function (b) {
                b.addEventListener('click', function () {
                    api('/admin/site/user/toggle', { id: b.getAttribute('data-utoggle') })
                        .then(function (d) { toast(d.message || '操作成功', d.status === 200 ? 'success' : 'error'); if (d.status === 200) uaLoadUsers(); });
                });
            });
            $$('[data-uban]', body).forEach(function (b) {
                b.addEventListener('click', function () {
                    var name = b.getAttribute('data-name');
                    if (b.textContent === '封禁') {
                        var reason = prompt('封禁用户「' + name + '」\n请输入封禁原因（将展示给用户）：', '违规使用，封禁处理');
                        if (reason === null) return;
                        api('/admin/site/user/ban', { id: b.getAttribute('data-uban'), action: 'ban', reason: reason })
                            .then(function (d) { toast(d.message || (d.status === 200 ? '已封禁' : '操作失败'), d.status === 200 ? 'success' : 'error'); if (d.status === 200) uaLoadUsers(); });
                    } else {
                        if (!window.confirm('解封用户「' + name + '」？解封后可正常登录使用。')) return;
                        api('/admin/site/user/ban', { id: b.getAttribute('data-uban'), action: 'unban' })
                            .then(function (d) { toast(d.message || (d.status === 200 ? '已解封' : '操作失败'), d.status === 200 ? 'success' : 'error'); if (d.status === 200) uaLoadUsers(); });
                    }
                });
            });
            $$('[data-udel]', body).forEach(function (b) {
                b.addEventListener('click', function () {
                    if (!window.confirm('确定删除用户「' + b.getAttribute('data-name') + '」？')) return;
                    api('/admin/site/user/delete', { id: b.getAttribute('data-udel') })
                        .then(function (d) { toast(d.message || '已删除', d.status === 200 ? 'success' : 'error'); uaLoadUsers(); });
                });
            });
            $$('[data-ucookie]', body).forEach(function (b) {
                b.addEventListener('click', function () {
                    api('/admin/site/user/cookie', { username: b.getAttribute('data-ucookie') })
                        .then(function (d) {
                            if (d.status !== 200) { toast(d.message || '获取失败', 'error'); return; }
                            var ck = (d.data && d.data.cookie) || '';
                            if (!ck) { toast('该用户未登录过网易云账号', 'info'); return; }
                            prompt('用户网易云 Cookie（Ctrl+C 复制）：', ck);
                        });
                });
            });
        });
    }

    /* ---- 全局 Cookie ---- */
    var uaQrTimer = null, uaUnikey = '', uaQrGen = 0;   // 轮询代次令牌（删除 Cookie 后作废旧轮询）
    function uaLoadCookieStatus() {
        api('/admin/cookie/status', {}).then(function (data) {
            var el = $('#ua-cookie-status');
            if (!el) return;
            if (data.status !== 200) { el.textContent = data.message || '获取失败'; return; }
            var info = data.data || {};
            el.textContent = (info.is_valid ? '✅ 有效' : '❌ 未登录') +
                (info.cookie_count != null ? ' · Cookie ' + info.cookie_count + ' 个' : '');
        });
    }
    function uaQrCreate() {
        api('/admin/qr/create', {}).then(function (data) {
            if (data.status !== 200) { toast(data.message || '生成二维码失败', 'error'); return; }
            var d = data.data || {};
            uaUnikey = d.unikey || '';
            var box = $('#ua-qr-box'), tip = $('#ua-qr-tip');
            if (d.qr_svg) {
                var uri = 'data:image/svg+xml;base64,' + btoa(unescape(encodeURIComponent(d.qr_svg)));
                box.innerHTML = '<img src="' + uri + '" style="width:180px;height:180px;" alt="二维码"/>';
            }
            if (tip) tip.textContent = '请使用网易云音乐手机 APP 扫码';
            if (uaQrTimer) clearInterval(uaQrTimer);
            uaQrGen++;                                    // 新轮询代次
            uaQrTimer = setInterval(uaQrPoll, 3000);
        });
    }
    function uaQrPoll() {
        if (!uaUnikey) { if (uaQrTimer) clearInterval(uaQrTimer); return; }
        var myGen = uaQrGen;                              // 本次轮询所属代次
        api('/admin/qr/check', { unikey: uaUnikey }).then(function (data) {
            if (myGen !== uaQrGen) return;                // 期间已删除 Cookie/重开扫码，丢弃迟到响应
            var tip = $('#ua-qr-tip');
            if (data.status !== 200) {
                if (uaQrTimer) clearInterval(uaQrTimer);
                if (tip) tip.textContent = data.message || '检查失败';
                return;
            }
            var st = data.data && data.data.status;
            if (st === 'waiting') { if (tip) tip.textContent = '等待扫码...'; }
            else if (st === 'scanned') { if (tip) tip.textContent = '✅ 已扫码，请在手机上确认'; }
            else if (st === 'success') {
                if (uaQrTimer) clearInterval(uaQrTimer);
                if (tip) tip.textContent = '🎉 登录成功，Cookie 已保存';
                toast('全局账号登录成功', 'success');
                uaLoadCookieStatus();
            } else {
                if (uaQrTimer) clearInterval(uaQrTimer);
                if (tip) tip.textContent = '二维码已过期，请重新生成';
            }
        });
    }
    function uaCookieDelete() {
        if (!window.confirm('确定删除全局 Cookie？删除后需重新扫码登录。')) return;
        api('/admin/cookie/delete', {}).then(function (data) {
            // 作废在途扫码轮询——迟到的 803 成功响应不得把刚删除的 Cookie 写回
            if (uaQrTimer) clearInterval(uaQrTimer);
            uaUnikey = '';
            uaQrGen++;
            toast(data.message || '已删除', data.status === 200 ? 'success' : 'error');
            var box = $('#ua-qr-box'), tip = $('#ua-qr-tip');
            if (box) box.innerHTML = '';
            if (tip) tip.textContent = '点击下方按钮生成二维码';
            uaLoadCookieStatus();
        });
    }

    /* ---- SMTP ---- */
    function uaLoadSmtp() {
        api('/admin/site/smtp/get', {}).then(function (data) {
            if (data.status !== 200) return;
            var d = data.data || {};
            if ($('#ua-smtp-host')) $('#ua-smtp-host').value = d.host || '';
            if ($('#ua-smtp-port')) $('#ua-smtp-port').value = d.port || 587;
            if ($('#ua-smtp-sender')) $('#ua-smtp-sender').value = d.sender || '';
        });
    }
    function uaSaveSmtp() {
        api('/admin/site/smtp/save', {
            host: ($('#ua-smtp-host') || {}).value || '',
            port: ($('#ua-smtp-port') || {}).value || 587,
            sender: ($('#ua-smtp-sender') || {}).value || '',
            password: ($('#ua-smtp-pass') || {}).value || ''
        }).then(function (d) {
            toast(d.message || '已保存', d.status === 200 ? 'success' : 'error');
            var p = $('#ua-smtp-pass'); if (p) p.value = '';
        });
    }
    function uaTestSmtp() {
        var to = ($('#ua-smtp-test-to') || {}).value || '';
        if (!to) { toast('请填写测试收件邮箱', 'error'); return; }
        var btn = $('#ua-smtp-test');
        btn.disabled = true;
        api('/admin/site/smtp/test', { to: to }).then(function (d) {
            toast(d.message || '已发送', d.status === 200 ? 'success' : 'error');
        }).finally(function () { btn.disabled = false; });
    }

    /* ---- 日志 ---- */
    var uaLogPage = 1;
    function uaLoadLogs() {
        api('/admin/site/logs', { type: uaLogsType, page: uaLogPage }).then(function (data) {
            var box = $('#ua-log-list');
            if (!box) return;
            if (data.status !== 200) { box.textContent = data.message || '加载失败'; return; }
            var logs = (data.data && data.data.logs) || [];
            var total = (data.data && data.data.total) || 0;
            var pages = (data.data && data.data.pages) || 1;
            uaLogPage = (data.data && data.data.page) || 1;
            window._uaLogPages = pages;   // next 按钮按真实页数封顶
            var el;
            if ((el = $('#ua-log-page'))) el.textContent = uaLogPage;
            if ((el = $('#ua-log-pages'))) el.textContent = pages;
            if ((el = $('#ua-log-total'))) el.textContent = total;
            if (!logs.length) { box.textContent = '暂无日志'; return; }
            box.innerHTML = logs.map(function (l) {
                return '<div>[' + escapeHtml(l.time) + '] ' + escapeHtml(l.username || '-') +
                    ' · ' + escapeHtml(l.action) + ' · IP ' + escapeHtml(l.ip) +
                    (l.detail ? ' · ' + escapeHtml(l.detail) : '') + '</div>';
            }).join('');
        });
    }

    function uaClearLogs() {
        var name = uaLogsType === 'fail' ? '失败' : '成功';
        if (!window.confirm('确定清除全部「' + name + '」日志？该操作不可恢复。')) return;
        api('/admin/site/logs/clear', { type: uaLogsType }).then(function (d) {
            toast(d.message || (d.status === 200 ? '已清除' : '清除失败'), d.status === 200 ? 'success' : 'error');
            uaLogPage = 1;
            uaLoadLogs();
        });
    }

    /* ---- 卡密 ---- */
    function uaGenCards() {
        var creditsVal = ($('#ua-card-minutes') || {}).value || '10';
        if (creditsVal === 'custom') {
            creditsVal = ($('#ua-card-custom') || {}).value || '0';
            if (!(parseInt(creditsVal, 10) > 0)) { toast('请填写自定义次数（正整数）', 'error'); return; }
        }
        api('/admin/site/cards/generate', {
            count: ($('#ua-card-count') || {}).value || 1,
            credits: creditsVal,
            prefix: ($('#ua-card-prefix') || {}).value || 'VIP',
            note: ($('#ua-card-note') || {}).value || '',
            valid_days: ($('#ua-card-days') || {}).value || 0
        }).then(function (data) {
            if (data.status !== 200) { toast(data.message || '生成失败', 'error'); return; }
            var box = $('#ua-card-codes');
            if (box) {
                box.hidden = false;
                box.textContent = (data.data.codes || []).join('\n');
            }
            toast('已生成 ' + (data.data.count || 0) + ' 张卡密（' + (data.data.credits || 0) + ' 次/张），已复制到文本框，请及时保存', 'success');
            uaLoadCards(0);
        });
    }
    // 卡密管理操作列（禁用/启用/删除）+ 分页（后端已支持，
    // 不分页则超出最新 100 张的旧卡密在界面上永远管理不到）
    var _uaCardPage = 0;
    var _uaCardTotal = 0;
    var UA_CARD_PAGE_SIZE = 100;
    function uaCardAction(act, code) {
        if (!code) return;
        if (act === 'delete' && !window.confirm('确定删除卡密 ' + code.slice(0, 4) + '**** 吗？删除后不可恢复。')) return;
        var url = act === 'delete' ? '/admin/site/cards/delete' : '/admin/site/cards/disable';
        var body = { code: code, disabled: act === 'enable' ? '0' : '1' };
        api(url, body).then(function (data) {
            toast(data.message || (data.status === 200 ? '操作成功' : '操作失败'),
                  data.status === 200 ? 'success' : 'error');
            if (data.status === 200) uaLoadCards();
        });
    }
    function _uaRenderCardPager() {
        var pager = $('#ua-cards-pager');
        if (!pager) return;
        if (_uaCardTotal <= 0) { pager.hidden = true; return; }
        var pages = Math.max(1, Math.ceil(_uaCardTotal / UA_CARD_PAGE_SIZE));
        pager.hidden = false;
        pager.textContent = '';
        var prev = document.createElement('button');
        prev.className = 'btn btn-sm'; prev.type = 'button'; prev.textContent = '上一页';
        prev.disabled = _uaCardPage <= 0;
        prev.addEventListener('click', function () { uaLoadCards(_uaCardPage - 1); });
        var next = document.createElement('button');
        next.className = 'btn btn-sm'; next.type = 'button'; next.textContent = '下一页';
        next.disabled = _uaCardPage >= pages - 1;
        next.addEventListener('click', function () { uaLoadCards(_uaCardPage + 1); });
        var info = document.createElement('span');
        info.className = 'hint';
        info.textContent = '第 ' + (_uaCardPage + 1) + ' / ' + pages + ' 页 · 共 ' + _uaCardTotal + ' 张';
        pager.appendChild(prev);
        pager.appendChild(info);
        pager.appendChild(next);
    }
    function uaLoadCards(page) {
        if (typeof page === 'number') _uaCardPage = Math.max(0, page);
        api('/admin/site/cards/list', { limit: UA_CARD_PAGE_SIZE, offset: _uaCardPage * UA_CARD_PAGE_SIZE })
            .then(function (data) {
            var body = $('#ua-cards-body');
            if (!body) return;
            if (data.status !== 200) { body.innerHTML = '<tr><td colspan="8">加载失败</td></tr>'; return; }
            var cards = (data.data && data.data.cards) || [];
            _uaCardTotal = (data.data && data.data.total) || 0;
            if (!cards.length) {
                body.innerHTML = '<tr><td colspan="8">暂无卡密</td></tr>';
                _uaRenderCardPager();
                return;
            }
            body.innerHTML = cards.map(function (c) {
                var st, act;
                if (c.used_by) {
                    st = '已使用';
                    act = '<span class="hint">—</span>';   // 兑换凭证保留，不给删除/禁用
                } else if (c.disabled) {
                    st = '已禁用';
                    act = '<button class="btn btn-sm" data-card-act="enable" data-card-code="' + escapeHtml(c.code) + '" type="button">启用</button> ' +
                          '<button class="btn btn-danger btn-sm" data-card-act="delete" data-card-code="' + escapeHtml(c.code) + '" type="button">删除</button>';
                } else {
                    // 过期判定用服务端下发的 expired（客户端时钟偏差会误标）
                    st = c.expired ? '已过期' : '未使用';
                    act = '<button class="btn btn-sm" data-card-act="disable" data-card-code="' + escapeHtml(c.code) + '" type="button">禁用</button> ' +
                          '<button class="btn btn-danger btn-sm" data-card-act="delete" data-card-code="' + escapeHtml(c.code) + '" type="button">删除</button>';
                }
                return '<tr><td>' + escapeHtml(c.code) + '</td><td>' + escapeHtml(String(c.minutes)) + ' 次</td><td>' + st + '</td><td>' + escapeHtml(c.used_by || '-') + '</td><td>' +
                    escapeHtml(c.note || '-') + '</td><td>' +
                    (c.expire_at ? new Date(c.expire_at * 1000).toLocaleDateString() : '永久') + '</td><td>' +
                    escapeHtml(c.created_at ? new Date(c.created_at * 1000).toLocaleDateString() : '-') + '</td><td>' + act + '</td></tr>';
            }).join('');
            _uaRenderCardPager();
            Array.prototype.forEach.call(body.querySelectorAll('button[data-card-act]'), function (b) {
                b.addEventListener('click', function () {
                    uaCardAction(b.getAttribute('data-card-act'), b.getAttribute('data-card-code'));
                });
            });
        });
    }

    /* ---- 公告 ---- */
    function uaLoadAnn() {
        api('/admin/site/ann/get', {}).then(function (data) {
            if (data.status !== 200) return;
            var d = data.data || {};
            if ($('#ua-ann-title')) $('#ua-ann-title').value = d.title || '';
            if ($('#ua-ann-content')) $('#ua-ann-content').value = d.content || '';
            if ($('#ua-ann-mode')) $('#ua-ann-mode').value = d.popup_mode || 'off';
        });
    }
    function uaSaveAnn() {
        api('/admin/site/ann/save', {
            title: ($('#ua-ann-title') || {}).value || '',
            content: ($('#ua-ann-content') || {}).value || '',
            popup_mode: ($('#ua-ann-mode') || {}).value || 'off'
        }).then(function (d) { toast(d.message || '已保存', d.status === 200 ? 'success' : 'error'); });
    }

    /* ---- 数据库 ---- */
    function fmtSize(n) {
        if (!n && n !== 0) return '-';
        if (n > 1048576) return (n / 1048576).toFixed(2) + ' MB';
        if (n > 1024) return (n / 1024).toFixed(1) + ' KB';
        return n + ' B';
    }
    function uaLoadDb() {
        api('/admin/site/backup/list', {}).then(function (data) {
            var body = $('#ua-db-body');
            if (!body) return;
            if (data.status !== 200) { body.innerHTML = '<tr><td colspan="4">加载失败</td></tr>'; return; }
            var d = data.data || {};
            var size = $('#ua-db-size'); if (size) size.textContent = fmtSize(d.db_size || 0);
            var hours = $('#ua-db-hours'); if (hours && d.interval_hours != null) hours.value = d.interval_hours;
            var baks = d.backups || [];
            if (!baks.length) { body.innerHTML = '<tr><td colspan="4">暂无备份</td></tr>'; return; }
            body.innerHTML = baks.map(function (b) {
                return '<tr><td>' + escapeHtml(b.name) + '</td><td>' + fmtSize(b.size) + '</td><td>' +
                    escapeHtml(b.time) + '</td><td>' +
                    '<a class="btn btn-sm" href="/admin/site/backup/download?name=' + encodeURIComponent(b.name) + '">下载</a> ' +
                    '<button class="btn btn-sm" data-restore="' + escapeHtml(b.name) + '">恢复</button> ' +
                    '<button class="btn btn-sm" data-bdel="' + escapeHtml(b.name) + '" style="color:var(--color-error);">删除</button></td></tr>';
            }).join('');
            $$('[data-restore]', body).forEach(function (b) {
                b.addEventListener('click', function () {
                    if (!window.confirm('确定用该备份覆盖当前数据库？')) return;
                    api('/admin/site/backup/restore', { name: b.getAttribute('data-restore') })
                        .then(function (d2) {
                            toast(d2.message || '已恢复', d2.status === 200 ? 'success' : 'error');
                            if (d2.status === 200) setTimeout(function () { location.reload(); }, 1200);
                        });
                });
            });
            $$('[data-bdel]', body).forEach(function (b) {
                b.addEventListener('click', function () {
                    if (!window.confirm('确定删除该备份？')) return;
                    api('/admin/site/backup/delete', { name: b.getAttribute('data-bdel') })
                        .then(function (d2) { toast(d2.message || '已删除', d2.status === 200 ? 'success' : 'error'); uaLoadDb(); });
                });
            });
        });
    }
    function uaBackup() {
        api('/admin/site/backup/create', {}).then(function (d) {
            toast(d.message || '备份完成', d.status === 200 ? 'success' : 'error');
            uaLoadDb();
        });
    }
    function uaBackupAuto() {
        api('/admin/site/backup/auto', { hours: ($('#ua-db-hours') || {}).value || 0 })
            .then(function (d) { toast(d.message || '已保存', d.status === 200 ? 'success' : 'error'); });
    }
    function uaBackupUpload(file) {
        var fd = new FormData();
        fd.append('file', file);
        fetch('/admin/site/backup/upload', { method: 'POST', body: fd, credentials: 'same-origin' })
            .then(function (r) {
                if (!r.ok) throw new Error('上传失败（HTTP ' + r.status + '）');
                return r.json();
            })
            .then(function (d) {
                toast(d.message || '上传完成', d.status === 200 ? 'success' : 'error');
                uaLoadDb();
            })
            .catch(function (err) {
                // 全站唯一绕过统一请求封装的调用此前无失败兜底——
                // 网络失败/非 JSON 响应时管理员毫无感知还制造 unhandledrejection 噪音
                toast((err && err.message) || '备份上传失败，请检查网络后重试', 'error');
            });
    }

    /* ---------------- 绑定 ---------------- */
    function bind() {
        bindAuthModal();
        var s1 = $('#login-submit'); if (s1) s1.addEventListener('click', doLogin);
        var s2 = $('#login-password'); if (s2) s2.addEventListener('keydown', function (e) { if (e.key === 'Enter') doLogin(); });
        // 回车提交覆盖全部输入框（登录用户名框 / 注册四框）
        var s2u = $('#login-username'); if (s2u) s2u.addEventListener('keydown', function (e) { if (e.key === 'Enter') doLogin(); });
        var s3 = $('#reg-submit'); if (s3) s3.addEventListener('click', doRegister);
        var s4 = $('#reg-send-code'); if (s4) s4.addEventListener('click', sendCode);
        ['#reg-username', '#reg-password', '#reg-email', '#reg-code'].forEach(function (sel) {
            var el = $(sel);
            if (el) el.addEventListener('keydown', function (e) { if (e.key === 'Enter') doRegister(); });
        });
        // 密码明文切换（登录/注册/找回）
        [['#login-pwd-eye', '#login-password'], ['#reg-pwd-eye', '#reg-password'], ['#forgot-pwd-eye', '#forgot-password']].forEach(function (pair) {
            var eye = $(pair[0]), input = $(pair[1]);
            if (!eye || !input) return;
            eye.addEventListener('click', function () {
                var show = input.type === 'password';
                input.type = show ? 'text' : 'password';
                eye.textContent = show ? '隐藏' : '显示';
            });
        });
        // 发码后修改邮箱 → 提前终止倒计时并恢复按钮，提示需重发
        var regEmail = $('#reg-email');
        if (regEmail) regEmail.addEventListener('input', function () {
            var btn = $('#reg-send-code');
            if (btn && btn.disabled && /^\d+s$/.test(btn.textContent)) {
                clearInterval(window.__regCodeTimer || 0);
                btn.disabled = false; btn.textContent = '发送验证码';
                toast('邮箱已修改，请重新发送验证码', 'info');
            }
        });
        // 找回视图——发码/提交/回车/改邮箱终止倒计时（对齐注册交互）
        var fsc = $('#forgot-send-code'); if (fsc) fsc.addEventListener('click', doForgotSendCode);
        var fsub = $('#forgot-submit'); if (fsub) fsub.addEventListener('click', doForgotReset);
        ['#forgot-email', '#forgot-code', '#forgot-password'].forEach(function (sel) {
            var el = $(sel);
            if (el) el.addEventListener('keydown', function (e) { if (e.key === 'Enter') doForgotReset(); });
        });
        var forgotEmail = $('#forgot-email');
        if (forgotEmail) forgotEmail.addEventListener('input', function () {
            var btn = $('#forgot-send-code');
            if (btn && btn.disabled && /^\d+s$/.test(btn.textContent)) {
                clearInterval(window.__forgotCodeTimer || 0);
                btn.disabled = false; btn.textContent = '发送验证码';
                toast('邮箱已修改，请重新发送验证码', 'info');
            }
        });
        // 管理员两步验证——发码/验证提交/回车提交
        var asc = $('#a2fa-send'); if (asc) asc.addEventListener('click', doA2faSendCode);
        var asb = $('#a2fa-submit'); if (asb) asb.addEventListener('click', doA2faVerify);
        ['#a2fa-email', '#a2fa-code'].forEach(function (sel) {
            var el = $(sel);
            if (el) el.addEventListener('keydown', function (e) { if (e.key === 'Enter') doA2faVerify(); });
        });
        var s6 = $('#announce-ok'); if (s6) s6.addEventListener('click', function () { closeModal('announce-modal'); });

        var ucTab = $('#tab-usercenter');
        if (ucTab) ucTab.addEventListener('click', renderUserCenter);
        var uaTab = $('#tab-useradmin');
        if (uaTab) uaTab.addEventListener('click', uaShowGate);
        var av = $('#user-avatar');
        if (av) av.addEventListener('click', function () {
            if (user && user.role === 'admin') { if (uaTab) uaTab.click(); }
            else { var t = $('#tab-usercenter'); if (t) t.click(); }
        });
        var ucRedeem = $('#uc-card-redeem'); if (ucRedeem) ucRedeem.addEventListener('click', doRedeem);
        var ucAnn = $('#uc-ann-view'); if (ucAnn) ucAnn.addEventListener('click', function () { maybeShowAnnouncement(true); });   // 手动查看强制展示
        var ucLogout = $('#uc-logout'); if (ucLogout) ucLogout.addEventListener('click', doLogout);

        uaBindSide();
        var b1 = $('#ua-users-refresh'); if (b1) b1.addEventListener('click', uaLoadUsers);
        var b2 = $('#ua-cookie-refresh'); if (b2) b2.addEventListener('click', uaLoadCookieStatus);
        var b3 = $('#ua-qr-create'); if (b3) b3.addEventListener('click', uaQrCreate);
        var b4 = $('#ua-cookie-delete'); if (b4) b4.addEventListener('click', uaCookieDelete);
        var b5 = $('#ua-smtp-save'); if (b5) b5.addEventListener('click', uaSaveSmtp);
        var b6 = $('#ua-smtp-test'); if (b6) b6.addEventListener('click', uaTestSmtp);
        var b7 = $('#ua-log-refresh'); if (b7) b7.addEventListener('click', function () { uaLoadLogs(); });
        var b8 = $('#ua-log-tab-ok'); if (b8) b8.addEventListener('click', function () { uaLogsType = 'success'; uaLogPage = 1; uaLoadLogs(); });
        var b9 = $('#ua-log-tab-fail'); if (b9) b9.addEventListener('click', function () { uaLogsType = 'fail'; uaLogPage = 1; uaLoadLogs(); });
        var blogPrev = $('#ua-log-prev'); if (blogPrev) blogPrev.addEventListener('click', function () { if (uaLogPage > 1) { uaLogPage--; uaLoadLogs(); } });
        // next 补边界（原实现可翻到空页——前端无 pages 时放宽为 999 防呆）
        var blogNext = $('#ua-log-next'); if (blogNext) blogNext.addEventListener('click', function () { var maxP = window._uaLogPages || 999; if (uaLogPage < maxP) { uaLogPage++; uaLoadLogs(); } });
        var blogClear = $('#ua-log-clear'); if (blogClear) blogClear.addEventListener('click', uaClearLogs);
        var b10 = $('#ua-card-gen'); if (b10) b10.addEventListener('click', uaGenCards);
        var cardType = $('#ua-card-minutes');
        if (cardType) cardType.addEventListener('change', function () {
            var custom = $('#ua-card-custom');
            if (custom) custom.hidden = cardType.value !== 'custom';
            if (cardType.value === 'custom' && custom) custom.focus();
        });
        var b11 = $('#ua-ann-save'); if (b11) b11.addEventListener('click', uaSaveAnn);
        var b12 = $('#ua-db-backup'); if (b12) b12.addEventListener('click', uaBackup);
        var b13 = $('#ua-db-auto'); if (b13) b13.addEventListener('click', uaBackupAuto);
        var b14 = $('#ua-db-upload');
        if (b14) b14.addEventListener('change', function () {
            if (b14.files && b14.files[0]) uaBackupUpload(b14.files[0]);
            b14.value = '';
        });

    }

    function init() {
        bind();
        refreshSession();
    }

    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', init);
    } else {
        init();
    }
})();