// ==UserScript==
// @name         Github Enhancement - High Speed Download (优化版)
// @name:zh-CN   Github 增强 - 高速下载 (优化版)
// @name:zh-TW   Github 增強 - 高速下載 (優化版)
// @name:ru      Улучшение GitHub – быстрое скачивание (оптимизированная версия)
// @version      2.6.42
// @author       辻弌 (based on X.I.U)
// @description  [Optimized] Based on the original Greasy Fork script (author: <a href="https://greasyfork.org/zh-CN/scripts/412245" target="_blank">X.I.U</a>) with improvements in stability and performance. High-speed download of Git Clone/SSH, Release, Raw, Code(ZIP) and other files (Based on public welfare), project list file quick download (☁)
// @description:zh-CN  [优化版] 基于 Greasy Fork 原脚本（作者：<a href="https://greasyfork.org/zh-CN/scripts/412245" target="_blank">X.I.U</a>）进行优化，提供更稳定的加速节点与性能改进。高速下载 Git Clone/SSH、Release、Raw、Code(ZIP) 等文件 (公益加速)、项目列表单文件快捷下载 (☁)
// @description:zh-TW  [優化版] 基於 Greasy Fork 原腳本（作者：<a href="https://greasyfork.org/zh-CN/scripts/412245" target="_blank">X.I.U</a>）進行優化，提供更穩定的加速節點與性能改進。高速下載 Git Clone/SSH、Release、Raw、Code(ZIP) 等文件 (公益加速)、項目列表單文件快捷下載 (☁)
// @description:ru  [Оптимизированная версия] На основе оригинального скрипта с Greasy Fork (автор: <a href="https://greasyfork.org/zh-CN/scripts/412245" target="_blank">X.I.U</a>) с улучшениями стабильности и производительности. Высокоскоростная загрузка Git Clone/SSH, выпусков, изначальных файлов, кода (ZIP) и других файлов (на основе общественного благосостояния), быстрая загрузка файлов из списка проектов (☁)
// @match        *://github.com/*
// @match        *://bgithub.xyz/*
// @icon         data:image/png;base64,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
// @grant        GM_registerMenuCommand
// @grant        GM_unregisterMenuCommand
// @grant        GM_openInTab
// @grant        GM_getValue
// @grant        GM_setValue
// @grant        GM_notification
// @grant        GM_setClipboard
// @grant        window.onurlchange
// @sandbox      JavaScript
// @license      GPL-3.0 License
// @run-at       document-end
// @namespace    https://greasyfork.org/scripts/412245
// @supportURL   https://github.com/XIU2/UserScript
// @homepageURL  https://github.com/XIU2/UserScript
// ==/UserScript==

(function() {
    'use strict';

    // ============================================================
    // 1. 配置：加速源列表（已清理无效节点）
    // ============================================================
    const SOURCES = {
        // Release / Code(ZIP) 加速源（美国为主）
        download_us: [
            ['https://gh.h233.eu.org/https://github.com', '美国', '[美国 Cloudflare CDN] - 由 @X.I.U/XIU2 提供'],
            ['https://gh.ddlc.top/https://github.com', '美国', '[美国 Cloudflare CDN] - 由 @mtr-static-official 提供'],
            ['https://gh-proxy.org/https://github.com', '美国', '[美国 Cloudflare CDN] - 由 gh-proxy.com 提供'],
            ['https://cors.isteed.cc/github.com', '美国', '[美国 Cloudflare CDN] - 由 @Lufs\'s 提供'],
            ['https://ghproxy.it/https://github.com', '美国', '[美国 洛杉矶] - 由 @yionchilau 提供'],
            ['https://github.boki.moe/https://github.com', '美国', '[美国 Cloudflare CDN] - 由 blog.boki.moe 提供'],
            ['https://gh.jasonzeng.dev/https://github.com', '美国', '[美国 Cloudflare CDN] - 由 gh.jasonzeng.dev 提供'],
            ['https://gh.monlor.com/https://github.com', '美国', '[美国 Cloudflare CDN] - 由 gh.monlor.com 提供'],
            ['https://github.geekery.cn/https://github.com', '美国', '[美国 Cloudflare CDN] - 由 github.geekery.cn 提供'],
            ['https://github.ednovas.xyz/https://github.com', '美国', '[美国 Cloudflare CDN] - 由 github.ednovas.xyz 提供'],
            ['https://ghfile.geekertao.top/https://github.com', '美国', '[美国 Cloudflare CDN] - 由 ghfile.geekertao.top 提供'],
            ['https://ghp.keleyaa.com/https://github.com', '美国', '[美国 Cloudflare CDN] - 由 ghp.keleyaa.com 提供'],
            ['https://gh.chjina.com/https://github.com', '美国', '[美国 Cloudflare CDN] - 由 gh.chjina.com 提供'],
            ['https://ghpxy.hwinzniej.top/https://github.com', '美国', '[美国 Cloudflare CDN] - 由 ghpxy.hwinzniej.top 提供'],
            ['https://cdn.crashmc.com/https://github.com', '美国', '[美国 Cloudflare CDN] - 由 cdn.crashmc.com 提供'],
            ['https://git.yylx.win/https://github.com', '美国', '[美国 Cloudflare CDN] - 由 git.yylx.win 提供'],
            ['https://gitproxy.mrhjx.cn/https://github.com', '美国', '[美国 Cloudflare CDN] - 由 gitproxy.mrhjx.cn 提供'],
            ['https://ghproxy.cxkpro.top/https://github.com', '美国', '[美国 Cloudflare CDN] - 由 ghproxy.cxkpro.top 提供'],
            ['https://gh.xxooo.cf/https://github.com', '美国', '[美国 Cloudflare CDN] - 由 gh.xxooo.cf 提供'],
            ['https://gh.idayer.com/https://github.com', '美国', '[美国 Cloudflare CDN] - 由 gh.idayer.com 提供'],
            ['https://down.npee.cn/?https://github.com', '美国', '[美国 Cloudflare CDN] - 由 npee社区 提供'],
            ['https://raw.ihtw.moe/github.com', '美国', '[美国 Cloudflare CDN] - 由 raw.ihtw.moe 提供'],
            ['https://xget.xi-xu.me/gh', '美国', '[美国 Cloudflare CDN] - 由 github.com/xixu-me/Xget 提供'],
            ['https://gh.zwy.one/https://github.com', '美国', '[美国 洛杉矶] - 由 gh.zwy.one 提供'],
            ['https://ghproxy.monkeyray.net/https://github.com', '美国', '[美国 洛杉矶] - 由 ghproxy.monkeyray.net 提供'],
        ],
        // 非美国节点（也加入随机池，但流量较大，因此混入少量）
        download_others: [
            ['https://ghproxy.net/https://github.com', '英国', '[英国伦敦] - 由 ghproxy.net 提供'],
            ['https://ghfast.top/https://github.com', '多国', '[日本/韩国/新加坡/美国/德国] - 由 ghproxy.link 提供'],
            ['https://wget.la/https://github.com', '多国', '[香港/台湾/日本/美国] - 由 ucdn.me 提供'],
        ],
        // Git Clone 加速源
        clone: [
            ['https://gitclone.com', '国内', '[中国 国内] - 由 GitClone 提供，有缓存，首次较慢'],
            ['https://wget.la/https://github.com', '香港', '[香港/台湾/日本/美国] - 由 ucdn.me 提供'],
            ['https://hk.gh-proxy.org/https://github.com', '香港', '[中国香港] - 由 gh-proxy.com 提供'],
            ['https://ghfast.top/https://github.com', '韩国', '[日本/韩国/新加坡/美国/德国] - 由 ghproxy.link 提供'],
            ['https://githubfast.com', '韩国', '[韩国] - 由 Github Fast 提供'],
        ],
        // Git Clone SSH 加速源（目前仅官方443端口）
        clone_ssh: [
            ['ssh://git@ssh.github.com:443/', 'Github 原生', '[日本/新加坡] - 官方443端口SSH，适用于限制22端口的网络'],
        ],
        // Raw 文件加速源
        raw: [
            ['https://raw.githubusercontent.com', 'Github 原生', '[日本 东京] 无缓存（或很短）'],
            ['https://wget.la/https://raw.githubusercontent.com', '香港', '[香港/台湾/日本/美国] - 由 ucdn.me 提供，无缓存'],
            ['https://hk.gh-proxy.org/https://raw.githubusercontent.com', '香港', '[中国香港] - 由 gh-proxy.com 提供，缓存约2小时'],
            ['https://ghfast.top/https://raw.githubusercontent.com', '韩国', '[日本/韩国/新加坡/美国/德国] - 由 ghproxy.link 提供，无缓存'],
            ['https://gh.catmak.name/https://raw.githubusercontent.com', '韩国', '[韩国 首尔] - 由 gh.catmak.name 提供'],
            ['https://fastly.jsdelivr.net/gh', '日本', '[日本 东京] - JSDelivr CDN，缓存，不支持>50MB及版本号分支'],
            ['https://cdn.gh-proxy.org/https://raw.githubusercontent.com', '日本', '[Fastly CDN] - 由 gh-proxy.com 提供，有缓存'],
            ['https://g.blfrp.cn/https://raw.githubusercontent.com', '日本', '[日本 东京] - 由 g.blfrp.cn 提供'],
        ]
    };

    // ============================================================
    // 2. 工具函数
    // ============================================================
    function shuffleArray(arr, keep = 5) {
        // 随机打乱并取前 keep 个
        const shuffled = arr.slice();
        for (let i = shuffled.length - 1; i > 0; i--) {
            const j = Math.floor(Math.random() * (i + 1));
            [shuffled[i], shuffled[j]] = [shuffled[j], shuffled[i]];
        }
        return shuffled.slice(0, keep);
    }

    function isValidUrl(string) {
        try {
            const url = new URL(string);
            return url.protocol === 'http:' || url.protocol === 'https:';
        } catch (_) {
            return false;
        }
    }

    function safeGMGet(key, def) {
        try { return GM_getValue(key, def); } catch (_) { return def; }
    }
    function safeGMSet(key, val) {
        try { GM_setValue(key, val); } catch (_) {}
    }
    function safeGMNotify(opt) {
        try { GM_notification(opt); } catch (_) {}
    }
    function safeGMClip(text) {
        try { GM_setClipboard(text); } catch (_) {}
    }

    // 生成加速按钮样式
    function getButtonStyle(region) {
        const colors = {
            '美国': '#3fb950',
            '香港': '#58a6ff',
            '韩国': '#f0883e',
            '日本': '#f2cc60',
            '国内': '#f97583',
            '英国': '#bc8cff',
            '多国': '#79c0ff',
            '自定义': '#ff7b72',
            'Github 原生': '#8b949e'
        };
        const bg = colors[region] || '#8b949e';
        return `padding:0 6px; margin-right:-1px; border-radius:2px; background-color:${bg}22; border-color:var(--borderColor-default); font-size:11px; color:var(--XIU2-font-color, #888);`;
    }

    // ============================================================
    // 3. 状态管理
    // ============================================================
    const STATE = {
        rawFastIndex: safeGMGet('xiu2_menu_raw_fast', 1),
        rawDownLink: safeGMGet('menu_rawDownLink', true),
        gitClone: safeGMGet('menu_gitClone', true),
        customRaw: safeGMGet('custom_raw_url', ''),
        customClone: safeGMGet('custom_clone_url', ''),
        customDownload: safeGMGet('custom_download_url', ''),
    };

    // 如果自定义加速源有效，插入到对应列表头部
    function buildDownloadUrls() {
        let us = SOURCES.download_us.slice();
        let others = SOURCES.download_others.slice();
        // 自定义优先
        if (STATE.customDownload && isValidUrl(STATE.customDownload)) {
            us.unshift([STATE.customDownload, '自定义', '[自定义 Release/Code(ZIP) 加速源]']);
        }
        // 随机取5个美国 + 全部其他（或随机取部分），这里简单合并全部其他，但为了均衡，随机取2个其他
        const shuffledOthers = shuffleArray(others, 2);
        const shuffledUs = shuffleArray(us, 5);
        return shuffledUs.concat(shuffledOthers);
    }

    function getRawUrls() {
        let raw = SOURCES.raw.slice();
        if (STATE.customRaw && isValidUrl(STATE.customRaw)) {
            raw.splice(1, 0, [STATE.customRaw, '自定义', '[自定义 Raw 加速源]']);
        }
        return raw;
    }

    function getCloneUrls() {
        let clone = SOURCES.clone.slice();
        if (STATE.customClone && isValidUrl(STATE.customClone)) {
            clone.unshift([STATE.customClone, '自定义', '[自定义 Git Clone 加速源]']);
        }
        return clone;
    }

    // ============================================================
    // 4. 核心功能
    // ============================================================
    let styleElement = null;

    function updateColorMode() {
        if (!styleElement) {
            styleElement = document.createElement('style');
            styleElement.id = 'XIU2-Github';
            document.documentElement.appendChild(styleElement);
        }
        let backColor = '#ffffff', fontColor = '#888888';
        const mode = document.documentElement.dataset.colorMode;
        const darkTheme = document.documentElement.dataset.darkTheme;
        if (mode === 'dark') {
            if (darkTheme === 'dark_dimmed') {
                backColor = '#272e37'; fontColor = '#768390';
            } else {
                backColor = '#161a21'; fontColor = '#97a0aa';
            }
        } else if (mode === 'auto') {
            if (window.matchMedia('(prefers-color-scheme: dark)').matches || (document.documentElement.dataset.lightTheme && document.documentElement.dataset.lightTheme.includes('dark'))) {
                if (darkTheme === 'dark_dimmed') {
                    backColor = '#272e37'; fontColor = '#768390';
                } else if (!darkTheme || !darkTheme.includes('light')) {
                    backColor = '#161a21'; fontColor = '#97a0aa';
                }
            }
        }
        styleElement.textContent = `.XIU2-RS a {--XIU2-background-color: ${backColor}; --XIU2-font-color: ${fontColor};}`;
    }

    // ---------- Release ----------
    function addRelease() {
        const boxes = document.querySelectorAll('.Box-footer');
        if (!boxes.length || !location.pathname.includes('/releases')) return;
        const urls = buildDownloadUrls();
        const divDisplay = document.documentElement.clientWidth > 755 ? 'margin-top:-3px;margin-left:8px;display:inherit;' : 'margin-left:-90px;';
        // 添加样式适应小屏幕
        const styleTag = document.createElement('style');
        styleTag.textContent = '@media (min-width:768px){.Box-footer li.Box-row>div>span.color-fg-muted{min-width:27px!important;}}';
        boxes[0].appendChild(styleTag);

        boxes.forEach(box => {
            if (box.querySelector('.XIU2-RS')) return;
            box.querySelectorAll('li.Box-row a').forEach(link => {
                const href = link.href.split(location.host)[1];
                if (!href) return;
                let html = `<div class="XIU2-RS" style="${divDisplay}">`;
                urls.forEach(([url, region, title]) => {
                    const fullUrl = url + href;
                    const style = getButtonStyle(region);
                    html += `<a style="${style}" class="btn" href="${fullUrl}" target="_blank" title="${title}\n\n提示：鼠标中键或Ctrl+点击在后台打开" rel="noreferrer noopener nofollow">${region}</a>`;
                });
                html += '</div>';
                link.parentElement.nextElementSibling?.insertAdjacentHTML('beforeend', html);
            });
        });
    }

    // ---------- Download ZIP ----------
    function addDownloadZIP(target) {
        const actionList = target.querySelector('ul[class^=prc-ActionList-ActionList-]');
        if (!actionList) return;
        const zipItem = actionList.querySelector('li:last-child');
        if (!zipItem) return;
        const zipLink = zipItem.querySelector('a[href^="/"][href$=".zip"]');
        if (!zipLink) return;
        const href = zipLink.getAttribute('href');
        if (!href) return;
        const urls = buildDownloadUrls();
        let html = '';
        urls.forEach(([url, region, title]) => {
            const fullUrl = url + href;
            const clone = zipItem.cloneNode(true);
            const a = clone.querySelector('a[href$=".zip"]');
            const span = clone.querySelector('span[id]');
            if (a) {
                a.href = fullUrl;
                a.setAttribute('target', '_blank');
                a.setAttribute('rel', 'noreferrer noopener nofollow');
                a.setAttribute('title', title + '\n\n提示：鼠标中键或Ctrl+点击在后台打开');
            }
            if (span) {
                span.textContent = 'Download ZIP ' + region;
            }
            html += clone.outerHTML;
        });
        zipItem.insertAdjacentHTML('afterend', html);
    }

    // ---------- Git Clone ----------
    function addGitClone(target) {
        const input = target.querySelector('input[value^="https:"]:not([title])');
        if (!input) return;
        const hrefSplit = input.value.split(location.host)[1];
        if (!hrefSplit) return;
        const cloneUrls = getCloneUrls();
        // 隐藏原生复制按钮
        if (input.nextElementSibling) input.nextElementSibling.hidden = true;
        if (input.parentElement.nextElementSibling?.tagName === 'P') {
            input.parentElement.nextElementSibling.textContent += ' (↑点击自动复制)';
        }
        const prefix = STATE.gitClone ? 'git clone ' : '';
        // 修改原输入框
        input.value = prefix + input.value;
        input.setAttribute('value', input.value);
        let html = '';
        const parentClass = input.parentElement.className;
        cloneUrls.forEach(([url, region, title]) => {
            const fullUrl = (url === 'https://gitclone.com') ? url + '/github.com' + hrefSplit : url + hrefSplit;
            const clone = input.cloneNode(true);
            clone.title = `${fullUrl}\n\n${title.replace(/&#10;/g, '\n')}\n\n点击复制`;
            clone.setAttribute('value', prefix + fullUrl);
            html += `<div style="margin-top:4px;" class="XIU2-GC ${parentClass}">${clone.outerHTML}</div>`;
        });
        input.parentElement.insertAdjacentHTML('afterend', html);
        // 点击复制事件（委托）
        const wrapper = input.parentElement.parentElement;
        if (!wrapper.classList.contains('XIU2-GCP')) {
            wrapper.classList.add('XIU2-GCP');
            wrapper.addEventListener('click', (e) => {
                if (e.target.tagName === 'INPUT') {
                    safeGMClip(e.target.value);
                }
            });
        }
    }

    function addGitCloneSSH(target) {
        const input = target.querySelector('input[value^="git@"]:not([title])');
        if (!input) return;
        const hrefSplit = input.value.split(':')[1];
        if (!hrefSplit) return;
        const cloneUrls = SOURCES.clone_ssh; // 目前只有官方
        if (input.nextElementSibling) input.nextElementSibling.hidden = true;
        if (input.parentElement.nextElementSibling?.tagName === 'P') {
            input.parentElement.nextElementSibling.textContent += ' (↑点击自动复制)';
        }
        const prefix = STATE.gitClone ? 'git clone ' : '';
        input.value = prefix + input.value;
        input.setAttribute('value', input.value);
        let html = '';
        const parentClass = input.parentElement.className;
        cloneUrls.forEach(([url, region, title]) => {
            const fullUrl = url + hrefSplit;
            const clone = input.cloneNode(true);
            clone.title = `${fullUrl}\n\n${title.replace(/&#10;/g, '\n')}\n\n点击复制`;
            clone.setAttribute('value', prefix + fullUrl);
            html += `<div style="margin-top:4px;" class="XIU2-GCS ${parentClass}">${clone.outerHTML}</div>`;
        });
        input.parentElement.insertAdjacentHTML('afterend', html);
        const wrapper = input.parentElement.parentElement;
        if (!wrapper.classList.contains('XIU2-GCP')) {
            wrapper.classList.add('XIU2-GCP');
            wrapper.addEventListener('click', (e) => {
                if (e.target.tagName === 'INPUT') {
                    safeGMClip(e.target.value);
                }
            });
        }
    }

    // ---------- Raw ----------
    function addRawFile() {
        const rawBtn = document.querySelector('a[data-testid="raw-button"]');
        if (!rawBtn) return;
        const href = location.href.replace(`https://${location.host}`, '');
        const href2 = href.replace('/blob/', '/');
        const rawUrls = getRawUrls();
        let html = '';
        rawUrls.slice(1).forEach(([url, region, title]) => {
            let fullUrl;
            if (url.includes('/gh') && url.endsWith('/gh') && !url.includes('cdn.staticaly.com')) {
                fullUrl = url + href.replace('/blob/', '@');
            } else {
                fullUrl = url + href2;
            }
            html += `<a href="${fullUrl}" title="${title}\n\nAlt+左键下载 或 右键另存为" target="_blank" role="button" rel="noreferrer noopener nofollow" data-size="small" data-variant="default" class="${rawBtn.className} XIU2-RF" style="border-radius:0;margin-left:-1px;">${region.replace(/ \d/,'')}</a>`;
        });
        document.querySelectorAll('.XIU2-RF').forEach(el => el.remove());
        rawBtn.insertAdjacentHTML('afterend', html);
    }

    // ---------- Raw 单文件快捷下载（☁） ----------
    function addRawDownLink() {
        if (!STATE.rawDownLink) return;
        if (location.pathname.includes('/tags')) return;
        const files = document.querySelectorAll('div.Box-row svg.octicon.octicon-file, .react-directory-filename-column>svg.color-fg-muted');
        if (!files.length) return;
        if (document.querySelector('a.fileDownLink')) return; // 已存在

        const rawUrls = getRawUrls();
        const selected = rawUrls[STATE.rawFastIndex] || rawUrls[0];
        const [baseUrl, region, title] = selected;

        files.forEach(fileSvg => {
            const tr = fileSvg.closest('div.Box-row, tr') || fileSvg.parentElement.parentElement;
            if (!tr) return;
            const link = tr.querySelector('[role="rowheader"] > .css-truncate > a, .react-directory-truncate>a');
            if (!link) return;
            const name = link.textContent.trim();
            const href = link.getAttribute('href');
            if (!href) return;
            const href2 = href.replace('/blob/', '/');
            let fullUrl;
            if (baseUrl.includes('/gh') && baseUrl.endsWith('/gh') && !baseUrl.includes('cdn.staticaly.com')) {
                fullUrl = baseUrl + href.replace('/blob/', '@');
            } else {
                fullUrl = baseUrl + href2;
            }
            const svgIcon = `<svg class="octicon octicon-cloud-download" aria-hidden="true" height="16" viewBox="0 0 16 16" width="16"><path d="M9 12h2l-3 3-3-3h2V7h2v5zm3-8c0-.44-.91-3-4.5-3C5.08 1 3 2.92 3 5 1.02 5 0 6.52 0 8c0 1.53 1 3 3 3h3V9.7H3C1.38 9.7 1.3 8.28 1.3 8c0-.17.05-1.7 1.7-1.7h1.3V5c0-1.39 1.56-2.7 3.2-2.7 2.55 0 3.13 1.55 3.2 1.8v1.2H12c.81 0 2.7.22 2.7 2.2 0 2.09-2.25 2.2-2.7 2.2h-2V11h2c2.08 0 4-1.16 4-3.5C16 5.06 14.08 4 12 4z"></path></svg>`;
            fileSvg.insertAdjacentHTML('afterend', `<a href="${fullUrl}" download="${name}" target="_blank" rel="noreferrer noopener nofollow" class="fileDownLink" style="display:none;" title="「${region}」\n\nAlt+左键下载 或 右键另存为\n\n${title.replace(/&#10;/g, '\n')}">${svgIcon}</a>`);
            // 鼠标悬停事件
            tr.addEventListener('mouseenter', function(e) {
                const links = this.querySelectorAll('.fileDownLink');
                const svgs = this.querySelectorAll('svg.octicon.octicon-file, svg.color-fg-muted');
                links.forEach(el => el.style.display = 'inline');
                svgs.forEach(el => el.style.display = 'none');
            });
            tr.addEventListener('mouseleave', function(e) {
                const links = this.querySelectorAll('.fileDownLink');
                const svgs = this.querySelectorAll('svg.octicon.octicon-file, svg.color-fg-muted');
                links.forEach(el => el.style.display = 'none');
                svgs.forEach(el => el.style.display = 'inline');
            });
        });
    }

    // ============================================================
    // 5. 菜单管理
    // ============================================================
    let menuIds = { raw: null, downLink: null, gitClone: null, custom: null, feedback: null };

    function registerMenu() {
        // 清理旧菜单
        Object.values(menuIds).forEach(id => { if (id) try { GM_unregisterMenuCommand(id); } catch (_) {} });
        const rawUrls = getRawUrls();
        const idx = STATE.rawFastIndex >= rawUrls.length ? 0 : STATE.rawFastIndex;
        const region = rawUrls[idx]?.[1] || '未知';
        const emojis = ['0️⃣','1️⃣','2️⃣','3️⃣','4️⃣','5️⃣','6️⃣','7️⃣','8️⃣','9️⃣','🔟'];
        const emoji = emojis[idx] || '🔟';
        menuIds.raw = GM_registerMenuCommand(`${emoji} [ ${region} ] 加速源 (☁) - 点击切换`, () => {
            const newIdx = (STATE.rawFastIndex + 1) % rawUrls.length;
            STATE.rawFastIndex = newIdx;
            safeGMSet('xiu2_menu_raw_fast', newIdx);
            // 删除旧☁链接并重新添加
            document.querySelectorAll('.fileDownLink').forEach(el => el.remove());
            addRawDownLink();
            safeGMNotify({ text: `已切换加速源为：${rawUrls[newIdx][1]}`, timeout: 3000 });
            registerMenu();
        });

        menuIds.downLink = GM_registerMenuCommand(`${STATE.rawDownLink ? '✅' : '❌'} 项目列表单文件快捷下载 (☁)`, () => {
            STATE.rawDownLink = !STATE.rawDownLink;
            safeGMSet('menu_rawDownLink', STATE.rawDownLink);
            safeGMNotify({ text: `已${STATE.rawDownLink?'开启':'关闭'} [项目列表单文件快捷下载] 功能\n（点击刷新网页生效）`, timeout: 3500, onclick: () => location.reload() });
            registerMenu();
        });

        menuIds.gitClone = GM_registerMenuCommand(`${STATE.gitClone ? '✅' : '❌'} 添加 git clone 命令`, () => {
            STATE.gitClone = !STATE.gitClone;
            safeGMSet('menu_gitClone', STATE.gitClone);
            safeGMNotify({ text: `已${STATE.gitClone?'开启':'关闭'} [添加 git clone 命令] 功能\n（点击刷新网页生效）`, timeout: 3500, onclick: () => location.reload() });
            registerMenu();
        });

        menuIds.custom = GM_registerMenuCommand(`#️⃣ 自定义加速源`, () => {
            const keys = [
                { key: 'custom_raw_url', desc: 'Raw 加速源', placeholder: 'https://example.com/https://raw.githubusercontent.com' },
                { key: 'custom_clone_url', desc: 'Git Clone 加速源', placeholder: 'https://example.com/https://github.com' },
                { key: 'custom_download_url', desc: 'Release/Code(ZIP) 加速源', placeholder: 'https://example.com/https://github.com' }
            ];
            (function promptNext(i) {
                if (i >= keys.length) {
                    safeGMNotify({ text: '自定义加速源设置完成！\n（刷新网页生效）', timeout: 3500, onclick: () => location.reload() });
                    return;
                }
                const { key, desc, placeholder } = keys[i];
                const current = safeGMGet(key, '');
                const input = prompt(`请输入自定义${desc}地址：\n当前：${current || '(未设置)'}\n\n示例：${placeholder}\n\n留空为不设置\n确定保存并继续，取消终止`, current);
                if (input === null) return;
                const val = input.trim();
                if (val && !isValidUrl(val)) {
                    safeGMNotify({ text: `❌ 地址无效，请重新输入`, timeout: 3000 });
                    promptNext(i);
                    return;
                }
                safeGMSet(key, val);
                // 更新状态
                STATE.customRaw = safeGMGet('custom_raw_url', '');
                STATE.customClone = safeGMGet('custom_clone_url', '');
                STATE.customDownload = safeGMGet('custom_download_url', '');
                promptNext(i + 1);
            })(0);
        });

        menuIds.feedback = GM_registerMenuCommand('💬 反馈 & 建议', () => {
            GM_openInTab('https://github.com/XIU2/UserScript', { active: true });
            GM_openInTab('https://greasyfork.org/zh-CN/scripts/412245/feedback', { active: true });
        });
    }

    // ============================================================
    // 6. 观察者与初始化
    // ============================================================
    function onUrlChange() {
        updateColorMode();
        if (location.pathname.includes('/releases')) addRelease();
        setTimeout(addRawFile, 800);
        setTimeout(addRawDownLink, 1200);
        // 重新绑定鼠标事件（若已存在）
        setTimeout(() => {
            document.querySelectorAll('.fileDownLink').forEach(el => {
                const tr = el.closest('div.Box-row, tr');
                if (tr && !tr._bound) {
                    tr._bound = true;
                    tr.addEventListener('mouseenter', function(e) {
                        this.querySelectorAll('.fileDownLink').forEach(l => l.style.display = 'inline');
                        this.querySelectorAll('svg.octicon.octicon-file, svg.color-fg-muted').forEach(s => s.style.display = 'none');
                    });
                    tr.addEventListener('mouseleave', function(e) {
                        this.querySelectorAll('.fileDownLink').forEach(l => l.style.display = 'none');
                        this.querySelectorAll('svg.octicon.octicon-file, svg.color-fg-muted').forEach(s => s.style.display = 'inline');
                    });
                }
            });
        }, 1500);
    }

    // 监听 URL 变化 (pjax)
    if (window.onurlchange === undefined) {
        const origPush = history.pushState;
        history.pushState = function() {
            const ret = origPush.apply(this, arguments);
            window.dispatchEvent(new Event('urlchange'));
            return ret;
        };
        const origReplace = history.replaceState;
        history.replaceState = function() {
            const ret = origReplace.apply(this, arguments);
            window.dispatchEvent(new Event('urlchange'));
            return ret;
        };
        window.addEventListener('popstate', () => window.dispatchEvent(new Event('urlchange')));
    }
    window.addEventListener('urlchange', onUrlChange);

    // MutationObserver 监听动态内容 (Release, Clone, ZIP)
    const observer = new MutationObserver((mutations) => {
        if (location.pathname.includes('/releases')) {
            for (const mut of mutations) {
                for (const node of mut.addedNodes) {
                    if (node.nodeType === 1 && node.matches && node.matches('.Box-footer')) {
                        addRelease();
                        break;
                    }
                }
            }
        } else if (document.querySelector('#repo-title-component')) {
            // 项目首页，监听到弹出层变化时处理 Clone 和 ZIP
            for (const mut of mutations) {
                for (const node of mut.addedNodes) {
                    if (node.nodeType === 1 && node.id === '__primerPortalRoot__') {
                        addGitClone(node);
                        addGitCloneSSH(node);
                        addDownloadZIP(node);
                    }
                }
            }
        }
    });
    // 缩小观察范围，只观察 #repo-content-pjax-container 或 body
    const targetNode = document.querySelector('#repo-content-pjax-container') || document.body;
    observer.observe(targetNode, { childList: true, subtree: true });

    // 初始执行
    setTimeout(() => {
        updateColorMode();
        registerMenu();
        onUrlChange();
        // 额外处理可能已经存在的 Release / Clone
        addRelease();
        // 如果当前是项目首页，尝试添加 Clone/ZIP（但DOM可能已存在）
        if (document.querySelector('#repo-title-component')) {
            const portal = document.querySelector('#__primerPortalRoot__');
            if (portal) {
                addGitClone(portal);
                addGitCloneSSH(portal);
                addDownloadZIP(portal);
            }
        }
    }, 500);

})();