复制到油猴脚本即可，支持以下站点

• https://gemini.google.com/app
• https://gemini-d-google-d-com-s-gmn.d.tuangouai.com/

js
// ==UserScript==
// @name         Gemini 聊天记录导出（标题化Markdown+复制）
// @namespace    https://tampermonkey.net/
// @version      1.3.0
// @description  提取当前会话聊天记录；去掉+1/+2引用标记；保留Markdown；支持导出和复制
// @author       You
// @match        https://gemini-d-google-d-com-s-gmn.d.tuangouai.com/app*
// @match        https://gemini.google.com/app*
// @grant        none
// @require      https://cdn.jsdelivr.net/npm/turndown/dist/turndown.js
// ==/UserScript==

(function () {
  'use strict';

  const sleep = (ms) => new Promise((r) => setTimeout(r, ms));

  function normalizeText(s) {
    return (s || '')
      .replace(/\u200B/g, '')
      .replace(/\r/g, '')
      .replace(/\n{3,}/g, '\n\n')
      .trim();
  }

  function oneLine(s) {
    return normalizeText(s).replace(/\n+/g, ' ').trim();
  }

  function cleanupCitationTokensInMarkdown(md) {
    if (!md) return '';
    return md
      // 删除独立的 +1 +2 +23 标记（前后是空白/标点/行首行尾）
      .replace(/(^|[\s(（\[])\+\d+(?=([\s)\]）.,，;；:：!?！？]|$))/g, '$1')
      // 删除整行只有 +1 +2 的行
      .replace(/^\s*(\+\d+\s*)+$/gm, '')
      .replace(/\n{3,}/g, '\n\n')
      .trim();
  }

  function getTurndown() {
    if (typeof TurndownService !== 'undefined') {
      return new TurndownService({
        headingStyle: 'atx',
        codeBlockStyle: 'fenced',
        emDelimiter: '*',
        bulletListMarker: '-',
        hr: '---'
      });
    }
    return null;
  }

  function cleanModelNode(node) {
    const clone = node.cloneNode(true);

    // 仅移除明显“非正文”控件，避免误删回答正文
    const removeSelectors = [
      'button',
      'mat-icon',
      'message-actions',
      'sources-carousel',
      'source-list',
      'fact-check',
      'style',
      'script',
      'noscript',
      'svg'
    ];
    clone.querySelectorAll(removeSelectors.join(',')).forEach((el) => el.remove());

    // 只删除文本本身是 +数字 的小节点
    clone.querySelectorAll('*').forEach((el) => {
      const t = (el.textContent || '').trim();
      if (/^\+\d+$/.test(t)) el.remove();
    });

    return clone;
  }

  function htmlToMarkdownFromModelNode(modelNode) {
    if (!modelNode) return '';
    const cleaned = cleanModelNode(modelNode);
    const td = getTurndown();
    if (td) {
      try {
        // 直接传 DOM，避免在启用 Trusted Types 的页面里 parseFromString 被拦截
        return cleanupCitationTokensInMarkdown(td.turndown(cleaned));
      } catch (_) {
        // 回退：保底使用纯文本
        return cleanupCitationTokensInMarkdown(normalizeText(cleaned.innerText || cleaned.textContent || ''));
      }
    }
    return cleanupCitationTokensInMarkdown(normalizeText(cleaned.innerText || cleaned.textContent || ''));
  }

  function getConversationTitle() {
    // 1) 优先使用侧边栏当前选中的会话标题（最稳定）
    const currentPath = location.pathname;
    const selectedConversation =
      document.querySelector(`a[data-test-id="conversation"][href="${currentPath}"] .conversation-title`) ||
      document.querySelector('a[data-test-id="conversation"][aria-current="true"] .conversation-title') ||
      document.querySelector('a[data-test-id="conversation"].selected .conversation-title') ||
      document.querySelector('.conversations-container .conversation.selected .conversation-title');

    const selectedTitle = oneLine(selectedConversation?.textContent || '');
    if (selectedTitle) return selectedTitle;

    // 2) 再尝试顶部标题区域
    const candidates = [
      '.conversation-title-button .mdc-button__label',
      '.conversation-title-button',
      '.project-conversation-title',
      '.conversation-title-container .conversation-title',
      'conversation-title button',
      '[data-test-id="conversation-title"]',
      'h1'
    ];

    for (const sel of candidates) {
      const el = document.querySelector(sel);
      const t = oneLine(el?.textContent || '');
      if (t) return t;
    }

    const dt = oneLine(document.title || '');
    if (dt) return dt.replace(/\s*[-|｜]\s*Gemini.*$/i, '').trim() || dt;
    return '聊天记录导出';
  }

  async function tryLoadMoreHistory() {
    const scroller =
      document.querySelector('#chat-history') ||
      document.querySelector('.chat-history-scroll-container') ||
      document.querySelector('infinite-scroller');

    if (!scroller || !(scroller instanceof HTMLElement)) return;

    let stableCount = 0;
    let lastHeight = 0;

    for (let i = 0; i < 25; i++) {
      scroller.scrollTop = 0;
      await sleep(450);

      const h = scroller.scrollHeight;
      if (h === lastHeight) stableCount++;
      else {
        stableCount = 0;
        lastHeight = h;
      }
      if (stableCount >= 3) break;
    }
  }

  function extractChats() {
    const containers = Array.from(document.querySelectorAll('.conversation-container'));
    const result = [];

    containers.forEach((c) => {
      const qLines = Array.from(c.querySelectorAll('user-query-content .query-text-line'))
        .map((x) => normalizeText(x.innerText))
        .filter(Boolean);

      const userText =
        qLines.join('\n') ||
        normalizeText(c.querySelector('user-query-content .query-content')?.innerText || '');

      const modelRoot =
        c.querySelector('model-response message-content .markdown-main-panel') ||
        c.querySelector('model-response message-content .markdown') ||
        c.querySelector('model-response message-content') ||
        c.querySelector('model-response .response-content');

      const modelMarkdown = htmlToMarkdownFromModelNode(modelRoot);
      if (!userText && !modelMarkdown) return;

      result.push({
        user: userText,
        model: modelMarkdown
      });
    });

    return result;
  }

  function toMarkdown(items, conversationTitle) {
    function normalizeModelHeadingLevels(md) {
      if (!md) return '';
      const lines = md.split('\n');
      let inFence = false;

      for (let i = 0; i < lines.length; i++) {
        const line = lines[i];

        if (/^\s*```/.test(line)) {
          inFence = !inFence;
          continue;
        }
        if (inFence) continue;

        const m = line.match(/^(\s*)(#{1,6})(\s+)(.*)$/);
        if (!m) continue;

        const indent = m[1];
        const level = m[2].length;
        const space = m[3];
        const text = m[4];
        const newLevel = level < 3 ? 3 : level;
        lines[i] = `${indent}${'#'.repeat(newLevel)}${space}${text}`;
      }

      return lines.join('\n');
    }

    const lines = [];
    lines.push(`# ${conversationTitle || '聊天记录导出'}`);
    lines.push('');

    for (const it of items) {
      const qTitle = oneLine(it.user) || '（空提问）';
      lines.push(`## ${qTitle}`);
      lines.push('');
      lines.push(normalizeModelHeadingLevels(it.model || '(空)'));
      lines.push('');
    }

    return lines.join('\n').trim() + '\n';
  }

  function toJsonString(items, conversationTitle) {
    return JSON.stringify(
      {
        title: conversationTitle || '聊天记录导出',
        exportedAt: new Date().toISOString(),
        total: items.length,
        items
      },
      null,
      2
    );
  }

  function download(filename, content, type = 'text/plain;charset=utf-8') {
    const blob = new Blob([content], { type });
    const url = URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.href = url;
    a.download = filename;
    a.click();
    URL.revokeObjectURL(url);
  }

  function showToast(message) {
    const id = 'tm-chat-export-toast';
    let toast = document.getElementById(id);

    if (!toast) {
      toast = document.createElement('div');
      toast.id = id;
      toast.style.cssText = `
        position: fixed;
        top: 20px;
        right: 20px;
        z-index: 1000000;
        background: rgba(0, 0, 0, 0.85);
        color: #fff;
        padding: 10px 14px;
        border-radius: 8px;
        font-size: 13px;
        line-height: 1.4;
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
        opacity: 0;
        transform: translateY(-6px);
        transition: opacity 0.2s ease, transform 0.2s ease;
        pointer-events: none;
      `;
      document.body.appendChild(toast);
    }

    toast.textContent = message;
    toast.style.opacity = '1';
    toast.style.transform = 'translateY(0)';

    clearTimeout(showToast._timer);
    showToast._timer = setTimeout(() => {
      toast.style.opacity = '0';
      toast.style.transform = 'translateY(-6px)';
    }, 1600);
  }

  async function copyToClipboard(text) {
    try {
      await navigator.clipboard.writeText(text);
      showToast('已复制到剪贴板');
    } catch (_) {
      const ta = document.createElement('textarea');
      ta.value = text;
      ta.style.position = 'fixed';
      ta.style.left = '-9999px';
      document.body.appendChild(ta);
      ta.select();
      const copied = document.execCommand('copy');
      ta.remove();
      if (copied) showToast('已复制到剪贴板');
      else alert('复制失败，请手动复制。');
    }
  }

  async function buildDataOrAlert() {
    await tryLoadMoreHistory();
    const data = extractChats();
    if (!data.length) {
      alert('未提取到聊天内容，请先打开有聊天记录的会话。');
      return null;
    }
    return {
      title: getConversationTitle(),
      items: data
    };
  }

  async function exportJSON() {
    const data = await buildDataOrAlert();
    if (!data) return;
    download(
      `gemini_chat_${Date.now()}.json`,
      toJsonString(data.items, data.title),
      'application/json;charset=utf-8'
    );
  }

  async function exportMD() {
    const data = await buildDataOrAlert();
    if (!data) return;
    download(
      `gemini_chat_${Date.now()}.md`,
      toMarkdown(data.items, data.title),
      'text/markdown;charset=utf-8'
    );
  }

  async function copyJSON() {
    const data = await buildDataOrAlert();
    if (!data) return;
    await copyToClipboard(toJsonString(data.items, data.title));
  }

  async function copyMD() {
    const data = await buildDataOrAlert();
    if (!data) return;
    await copyToClipboard(toMarkdown(data.items, data.title));
  }

  function addPanel() {
    if (document.getElementById('tm-chat-export-panel')) return;

    const panel = document.createElement('div');
    panel.id = 'tm-chat-export-panel';
    panel.style.cssText = `
      position: fixed;
      top: 88px;
      right: 20px;
      z-index: 999999;
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
      background: #000;
      border: 1px solid #000;
      border-radius: 10px;
      padding: 8px;
      box-shadow: 0 6px 20px rgba(0,0,0,.12);
      font-family: sans-serif;
      max-width: 360px;
    `;

    function mkBtn(text, onClick) {
      const b = document.createElement('button');
      b.textContent = text;
      b.style.cssText = 'padding:6px 10px; cursor:pointer; border-radius:8px; border:1px solid #000; background:#000; color:#fff;';
      b.onclick = onClick;
      return b;
    }

    panel.appendChild(mkBtn('导出 JSON', exportJSON));
    panel.appendChild(mkBtn('导出 MD', exportMD));
    panel.appendChild(mkBtn('复制 JSON', copyJSON));
    panel.appendChild(mkBtn('复制 MD', copyMD));

    document.body.appendChild(panel);
  }

  const observer = new MutationObserver(() => addPanel());
  observer.observe(document.documentElement, { childList: true, subtree: true });
  addPanel();
})();