mnote/rust/crates/mnote-web/src/ssr/pages/layout.rs

//! MNOTE 通用页面布局组件（Wolai / Notion 风格）

use leptos::prelude::*;

const SIDEBAR_TREE_JS: &str = r##"
(function(){
  if (window.__mnoteSidebarTreeRuntimeStarted) return;
  window.__mnoteSidebarTreeRuntimeStarted = true;

  var PAGE_DRAG_MIME = 'application/x-mnote-page-tree-node';
  var FILETREE_DRAG_MIME = 'application/x-mnote-filetree-row-ids';
  var MNOTE_SIDEBAR_TREE_MODE_KEY = 'mnote.sidebar.tree.mode';
  var MNOTE_RECENT_LOCAL_ROOTS_KEY = 'mnote.localFolder.recentRoots';
  var MNOTE_LAST_CLOUD_WORKSPACE_KEY = 'mnote.workspace.lastCloudWorkspaceId';
  var MNOTE_GLOBAL_SHOW_HEADING_NUMBERS_KEY = 'mnote.global.showHeadingNumbers';
  var mnoteNavigationInFlight = '';
  var draggingPageNodeId = '';
  var activePageDropRow = null;
  var draggingFileTreeRowIds = [];
  var activeFileTreeDropRow = null;
  var sidebarFileTreeSelection = {
    selectedRowIds: new Set(),
    anchorRowId: null,
    focusedRowId: null
  };
  var projectionRefreshTimer = 0;
  var activeTreeContextMenu = null;
  var pageUiState = {
    pageOptions: null,
    historySnapshots: [],
    pageSettingsOpen: false,
    pageAiOpen: false,
    pageAiBusy: false,
    pageAiMessages: [],
    pageAiSuggestionIndex: 0,
    pageAiProvider: 'hermes',
    pageAiPage: 'chat',
    pageAiSessions: [],
    pageAiActiveSessionId: ''
  };

  function closestAction(target, selector) {
    return target && typeof target.closest === 'function' ? target.closest(selector) : null;
  }

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

  function cssEscape(value) {
    if (window.CSS && typeof window.CSS.escape === 'function') return window.CSS.escape(value);
    return String(value).replace(/["\\]/g, '\\$&');
  }

  function parseJsonScript(id) {
    var node = document.getElementById(id);
    if (!node) return null;
    try {
      return JSON.parse(node.textContent || 'null');
    } catch (_) {
      return null;
    }
  }

  function currentDocumentId() {
    var match = window.location.pathname.match(/^\/documents\/([^\/]+)/);
    return match ? decodeURIComponent(match[1]) : '';
  }

  function currentPageAggregate() {
    return parseJsonScript('__MNOTE_PAGE_AGGREGATE__') || {};
  }

  function defaultPageOptions() {
    return {
      wideLayout: false,
      smallText: false,
      layoutDensity: 'normal',
      showHeadingNumbers: false,
      showToc: false,
      showStructure: false,
      protectEditing: false,
      showWordCount: true,
      collapseBacklinks: false,
      pageFont: 'default',
      hideChildPages: false,
      showBlockRefCount: false,
      embedDefaultBlockId: null
    };
  }

  function currentPageOptions() {
    if (pageUiState.pageOptions) return pageUiState.pageOptions;
    var aggregate = currentPageAggregate();
    var current = aggregate && aggregate.layout && aggregate.layout.pageOptions && typeof aggregate.layout.pageOptions === 'object'
      ? aggregate.layout.pageOptions
      : null;
    if (!current) {
      return defaultPageOptions();
    }
    pageUiState.pageOptions = Object.assign(defaultPageOptions(), current);
    return pageUiState.pageOptions;
  }

  function readGlobalShowHeadingNumbers() {
    try {
      var raw = window.localStorage ? window.localStorage.getItem(MNOTE_GLOBAL_SHOW_HEADING_NUMBERS_KEY) : '';
      return raw === 'true' || raw === '1';
    } catch (_) {
      return false;
    }
  }

  function writeGlobalShowHeadingNumbers(value) {
    try {
      if (window.localStorage) {
        window.localStorage.setItem(MNOTE_GLOBAL_SHOW_HEADING_NUMBERS_KEY, value ? 'true' : 'false');
      }
    } catch (_) {}
    document.documentElement.setAttribute('data-global-show-heading-numbers', String(Boolean(value)));
  }

  function effectiveShowHeadingNumbers(options) {
    return readGlobalShowHeadingNumbers();
  }

  function pageOptionIsSupported(name) {
    return name === 'wideLayout'
      || name === 'smallText'
      || name === 'layoutDensity'
      || name === 'pageFont'
      || name === 'showHeadingNumbers';
  }

  function pageOptionDescription(name) {
    if (name === 'wideLayout') return '自适应宽度';
    if (name === 'smallText') return '小字体';
    if (name === 'showToc') return '标题目录';
    if (name === 'showHeadingNumbers') return '标题自动编号';
    if (name === 'protectEditing') return '编辑保护';
    if (name === 'collapseBacklinks') return '折叠反向引用';
    if (name === 'hideChildPages') return '隐藏子页面';
    if (name === 'showBlockRefCount') return '显示块引用数字';
    return name;
  }

  function pageOptionHint(name) {
    if (name === 'wideLayout') return '已接通：主内容列宽度立即变化';
    if (name === 'smallText') return '已接通：正文排版会更紧凑';
    if (name === 'showHeadingNumbers') return '已接通：标题前显示顺序编号';
    if (name === 'layoutDensity') return '已接通：段落与列表间距会变化';
    if (name === 'pageFont') return '已接通：当前页面字体会切换';
    if (name === 'showToc') return '待接线：当前 Rust 壳还没有正式目录面板';
    if (name === 'protectEditing') return '待接线：当前主编辑器只显示降级说明';
    if (name === 'collapseBacklinks') return '待接线：当前 Rust 壳未挂回链面板';
    if (name === 'hideChildPages') return '待接线：当前页面壳还没有子页面块显隐';
    if (name === 'showBlockRefCount') return '待接线：当前页面壳未显示块引用计数';
    return '待接线';
  }

  function ensureHistorySnapshotsSeeded() {
    if (pageUiState.historySnapshots.length > 0) return;
    var aggregate = currentPageAggregate();
    var stats = aggregate && aggregate.stats && typeof aggregate.stats === 'object' ? aggregate.stats : {};
    pageUiState.historySnapshots = [{
      id: 'snapshot-initial',
      timestamp: Date.now(),
      stats: {
        wordCount: Number(stats.wordCount || 0),
        characterCount: Number(stats.characterCount || 0),
        blockCount: Number(stats.blockCount || 0),
        todoTotal: Number(stats.todoTotal || 0),
        todoDone: Number(stats.todoDone || 0)
      }
    }];
  }

  function computeLivePageStats() {
    var aggregate = currentPageAggregate();
    var fallbackStats = aggregate && aggregate.stats && typeof aggregate.stats === 'object' ? aggregate.stats : {};
    var editor = document.querySelector('[data-testid="mnote-leptos-tiptap-island-editor-root"] .editor-surface .ProseMirror');
    if (!(editor instanceof HTMLElement)) {
      return {
        wordCount: Number(fallbackStats.wordCount || 0),
        characterCount: Number(fallbackStats.characterCount || 0),
        blockCount: Number(fallbackStats.blockCount || 0),
        todoTotal: Number(fallbackStats.todoTotal || 0),
        todoDone: Number(fallbackStats.todoDone || 0)
      };
    }
    var text = (editor.textContent || '').trim();
    var compact = text.replace(/\s+/g, ' ').trim();
    var wordCount = compact ? compact.split(' ').filter(Boolean).length : 0;
    var characterCount = text.replace(/\s/g, '').length;
    var blockCount = editor.querySelectorAll(':scope > *').length;
    var todos = Array.from(editor.querySelectorAll('input[type="checkbox"]'));
    return {
      wordCount: wordCount || Number(fallbackStats.wordCount || 0),
      characterCount: characterCount || Number(fallbackStats.characterCount || 0),
      blockCount: blockCount || Number(fallbackStats.blockCount || 0),
      todoTotal: todos.length || Number(fallbackStats.todoTotal || 0),
      todoDone: todos.filter(function(node){ return node.checked; }).length || Number(fallbackStats.todoDone || 0)
    };
  }

  function recordPageHistorySnapshot(reason, stats) {
    ensureHistorySnapshotsSeeded();
    pageUiState.historySnapshots = [{
      id: 'snapshot-' + Date.now(),
      timestamp: Date.now(),
      reason: reason || 'save',
      stats: stats || computeLivePageStats()
    }].concat(pageUiState.historySnapshots).slice(0, 15);
    renderPageHistoryDrawer();
  }

  function applyPageOptionsToShell() {
    var options = currentPageOptions();
    var globalShowHeadingNumbers = readGlobalShowHeadingNumbers();
    var showHeadingNumbers = effectiveShowHeadingNumbers(options);
    var shell = document.querySelector('.document-shell');
    var editorRoot = document.querySelector('[data-testid="mnote-leptos-tiptap-island-editor-root"]');
    var editorSurface = editorRoot && editorRoot.querySelector('.editor-surface');
    if (shell instanceof HTMLElement) {
      shell.setAttribute('data-page-wide-layout', String(Boolean(options.wideLayout)));
      shell.setAttribute('data-page-small-text', String(Boolean(options.smallText)));
      shell.setAttribute('data-layout-density', String(options.layoutDensity || 'normal'));
      shell.setAttribute('data-page-font', String(options.pageFont || 'default'));
      shell.setAttribute('data-page-show-heading-numbers', String(showHeadingNumbers));
      shell.style.width = '100%';
      shell.style.maxWidth = options.wideLayout ? '980px' : '760px';
    }
    if (editorRoot instanceof HTMLElement) {
      editorRoot.setAttribute('data-page-wide-layout', String(Boolean(options.wideLayout)));
      editorRoot.setAttribute('data-page-small-text', String(Boolean(options.smallText)));
      editorRoot.setAttribute('data-page-show-heading-numbers', String(showHeadingNumbers));
      editorRoot.setAttribute('data-page-embed-default-block-id', options.embedDefaultBlockId == null ? '' : String(options.embedDefaultBlockId));
    }
    if (editorSurface instanceof HTMLElement) {
      editorSurface.setAttribute('data-layout-density', String(options.layoutDensity || 'normal'));
      editorSurface.setAttribute('data-page-font', String(options.pageFont || 'default'));
      editorSurface.setAttribute('data-show-heading-numbers', String(showHeadingNumbers));
    }
    document.documentElement.setAttribute('data-page-wide-layout', String(Boolean(options.wideLayout)));
    document.documentElement.setAttribute('data-page-small-text', String(Boolean(options.smallText)));
    document.documentElement.setAttribute('data-layout-density', String(options.layoutDensity || 'normal'));
    document.documentElement.setAttribute('data-page-font', String(options.pageFont || 'default'));
    document.documentElement.setAttribute('data-global-show-heading-numbers', String(globalShowHeadingNumbers));
    document.documentElement.setAttribute('data-page-show-heading-numbers', String(showHeadingNumbers));
  }

  function normalizeSidebarTreeMode(value) {
    var mode = String(value || '').trim();
    return mode === 'filetree' ? 'filetree' : 'page';
  }

  function readStoredSidebarTreeMode() {
    var params = new URLSearchParams(window.location.search);
    var fromUrl = normalizeSidebarTreeMode(params.get('treeView') || params.get('sidebarTree'));
    if (params.has('treeView') || params.has('sidebarTree')) return fromUrl;
    try {
      var stored = window.sessionStorage ? window.sessionStorage.getItem(MNOTE_SIDEBAR_TREE_MODE_KEY) : '';
      return normalizeSidebarTreeMode(stored);
    } catch (_) {
      return 'page';
    }
  }

  function persistSidebarTreeMode(mode) {
    var normalized = normalizeSidebarTreeMode(mode);
    document.documentElement.setAttribute('data-mnote-sidebar-tree-mode', normalized);
    try {
      if (window.sessionStorage) window.sessionStorage.setItem(MNOTE_SIDEBAR_TREE_MODE_KEY, normalized);
    } catch (_) {}
    return normalized;
  }

  function activeSidebarTreeMode() {
    var active = document.querySelector('[data-mnote-sidebar-tree-tab][aria-selected="true"]');
    if (active instanceof HTMLElement) {
      return normalizeSidebarTreeMode(active.getAttribute('data-mnote-sidebar-tree-tab'));
    }
    return readStoredSidebarTreeMode();
  }

  function resolveWorkspaceId(trigger) {
    var direct = (trigger.getAttribute('data-workspace-id') || '').trim();
    if (direct) return direct;
    var root = trigger.closest('[data-workspace-id]');
    if (root) {
      var value = (root.getAttribute('data-workspace-id') || '').trim();
      if (value) return value;
    }
    return (new URLSearchParams(window.location.search).get('workspaceId') || 'default').trim() || 'default';
  }

  function currentSourceKind() {
    return (new URLSearchParams(window.location.search).get('sourceKind') || 'convex_workspace').trim() || 'convex_workspace';
  }

  function rememberCloudWorkspaceId(workspaceId) {
    var normalized = String(workspaceId || '').trim();
    if (!normalized || normalized === 'local-folder') return;
    try {
      if (window.localStorage) window.localStorage.setItem(MNOTE_LAST_CLOUD_WORKSPACE_KEY, normalized);
    } catch (_) {}
  }

  function readLastCloudWorkspaceId() {
    try {
      var stored = window.localStorage ? window.localStorage.getItem(MNOTE_LAST_CLOUD_WORKSPACE_KEY) : '';
      if (stored && stored.trim()) return stored.trim();
    } catch (_) {}
    var params = new URLSearchParams(window.location.search);
    var fromUrl = (params.get('workspaceId') || '').trim();
    if (fromUrl && currentSourceKind() !== 'local_folder') return fromUrl;
    var fromDom = document.querySelector('[data-workspace-id]');
    if (fromDom instanceof HTMLElement) {
      var value = (fromDom.getAttribute('data-workspace-id') || '').trim();
      if (value && value !== 'local-folder') return value;
    }
    return '';
  }

  function copyWorkspaceSourceParams(targetUrl) {
    var params = new URLSearchParams(window.location.search);
    ['sourceKind', 'rootUri', 'secondaryDocumentId', 'secondarySourceKind', 'secondaryRootUri'].forEach(function(name) {
      var value = (params.get(name) || '').trim();
      if (value) targetUrl.searchParams.set(name, value);
    });
  }

  function currentWorkspaceSourcePayload() {
    var params = new URLSearchParams(window.location.search);
    var payload = {};
    ['sourceKind', 'rootUri'].forEach(function(name) {
      var value = (params.get(name) || '').trim();
      if (value) payload[name] = value;
    });
    return payload;
  }

  function readRecentLocalRoots() {
    try {
      var raw = window.localStorage ? window.localStorage.getItem(MNOTE_RECENT_LOCAL_ROOTS_KEY) : '';
      var parsed = raw ? JSON.parse(raw) : [];
      return Array.isArray(parsed) ? parsed.filter(function(value) {
        return typeof value === 'string' && value.trim();
      }).slice(0, 10) : [];
    } catch (_) {
      return [];
    }
  }

  function rememberLocalRoot(rootUri) {
    try {
      if (!window.localStorage) return;
      var roots = readRecentLocalRoots().filter(function(value) { return value !== rootUri; });
      roots.unshift(rootUri);
      window.localStorage.setItem(MNOTE_RECENT_LOCAL_ROOTS_KEY, JSON.stringify(roots.slice(0, 10)));
    } catch (_) {}
  }

  function pathToFileRootUri(value) {
    var trimmed = String(value || '').trim();
    if (!trimmed) return '';
    if (/^file:\/\//i.test(trimmed)) return trimmed;
    if (trimmed.charAt(0) !== '/') return '';
    return 'file://' + trimmed.split('/').map(function(part, index) {
      return index === 0 ? '' : encodeURIComponent(part);
    }).join('/');
  }

  function fileRootUriToPathInput(rootUri) {
    var value = String(rootUri || '').replace(/^file:\/\//, '');
    try {
      return decodeURIComponent(value);
    } catch (_) {
      return value;
    }
  }

  function openLocalFolderRoot(rootUri) {
    if (currentSourceKind() !== 'local_folder') {
      rememberCloudWorkspaceId(resolveWorkspaceId(document.body));
    }
    rememberLocalRoot(rootUri);
    var targetUrl = new URL('/', window.location.origin);
    targetUrl.searchParams.set('treeView', 'filetree');
    targetUrl.searchParams.set('sourceKind', 'local_folder');
    targetUrl.searchParams.set('rootUri', rootUri);
    window.location.href = targetUrl.toString();
  }

  function switchToCloudWorkspace() {
    var targetUrl = new URL('/', window.location.origin);
    var workspaceId = readLastCloudWorkspaceId();
    if (workspaceId) targetUrl.searchParams.set('workspaceId', workspaceId);
    targetUrl.searchParams.set('sourceKind', 'convex_workspace');
    window.location.href = targetUrl.toString();
  }

  function closeLocalFolderDialog() {
    var existing = document.querySelector('[data-testid="mnote-local-folder-dialog"]');
    if (existing && existing.parentElement) existing.parentElement.removeChild(existing);
  }

  function readPathFromDirectoryFiles(files) {
    var first = files && files.length ? files[0] : null;
    if (!first) return '';
    var rawPath = typeof first.path === 'string' ? first.path : '';
    var relative = typeof first.webkitRelativePath === 'string' ? first.webkitRelativePath : '';
    if (rawPath && relative) {
      var suffix = relative.split('/').filter(Boolean).join('/');
      if (suffix && rawPath.endsWith(suffix)) {
        return rawPath.slice(0, rawPath.length - suffix.length).replace(/[\/\\]$/, '');
      }
    }
    if (rawPath) return rawPath;
    return '';
  }

  function requestBrowserFolderChoice(statusNode) {
    return new Promise(function(resolve) {
      var input = document.createElement('input');
      input.type = 'file';
      input.multiple = true;
      input.setAttribute('webkitdirectory', '');
      input.setAttribute('directory', '');
      input.style.position = 'fixed';
      input.style.left = '-9999px';
      input.addEventListener('change', function() {
        var selectedPath = readPathFromDirectoryFiles(input.files || []);
        if (input.parentElement) input.parentElement.removeChild(input);
        if (!selectedPath && statusNode instanceof HTMLElement) {
          statusNode.textContent = '当前浏览器没有暴露本机绝对路径，请在下方输入路径。';
        }
        resolve(selectedPath);
      }, { once: true });
      document.body.appendChild(input);
      input.click();
    });
  }

  async function requestNativeFolderChoice(statusNode) {
    var desktopPicker = window.__mnoteDesktop && typeof window.__mnoteDesktop.selectLocalFolder === 'function'
      ? window.__mnoteDesktop.selectLocalFolder
      : null;
    if (desktopPicker) {
      var selected = await desktopPicker();
      return typeof selected === 'string' ? selected : '';
    }
    if (typeof window.showDirectoryPicker === 'function') {
      var handle = await window.showDirectoryPicker({ mode: 'read' });
      var handlePath = handle && (handle.path || handle.mnotePath || handle.nativePath);
      if (typeof handlePath === 'string' && handlePath.trim()) return handlePath;
      if (statusNode instanceof HTMLElement) {
        statusNode.textContent = '已选择“' + (handle && handle.name ? handle.name : '文件夹') + '”，但浏览器没有暴露本机绝对路径，请在下方确认路径。';
      }
      return '';
    }
    return requestBrowserFolderChoice(statusNode);
  }

  function openLocalFolderDialog(initialMessage) {
    closeLocalFolderDialog();
    var recent = readRecentLocalRoots();
    var dialog = document.createElement('div');
    dialog.className = 'mnote-local-folder-dialog';
    dialog.setAttribute('data-testid', 'mnote-local-folder-dialog');
    dialog.setAttribute('role', 'dialog');
    dialog.setAttribute('aria-modal', 'true');
    dialog.style.position = 'fixed';
    dialog.style.inset = '0';
    dialog.style.zIndex = '2147483646';
    dialog.style.background = 'rgba(15, 23, 42, 0.28)';
    dialog.style.display = 'flex';
    dialog.style.alignItems = 'center';
    dialog.style.justifyContent = 'center';
    var card = document.createElement('div');
    card.className = 'mnote-local-folder-dialog__card';
    card.style.width = 'min(640px, calc(100vw - 32px))';
    card.style.background = '#fff';
    card.style.border = '1px solid rgba(27, 28, 28, 0.12)';
    card.style.borderRadius = '8px';
    card.style.padding = '16px';
    card.style.boxShadow = '0 18px 48px rgba(15, 23, 42, 0.22)';
    card.style.display = 'grid';
    card.style.gap = '12px';
    var title = document.createElement('h2');
    title.textContent = '打开本地文件夹';
    title.style.margin = '0';
    title.style.fontSize = '18px';
    title.style.lineHeight = '1.4';
    var status = document.createElement('p');
    status.className = 'mnote-local-folder-dialog__status';
    status.setAttribute('data-testid', 'mnote-local-folder-status');
    status.textContent = initialMessage || '选择一个本机文件夹，或输入绝对路径。';
    status.style.margin = '0';
    status.style.color = '#4b5563';
    status.style.fontSize = '13px';
    var input = document.createElement('input');
    input.type = 'text';
    input.autocomplete = 'off';
    input.spellcheck = false;
    input.placeholder = '/mnt/Data1T/mnote/design/04-tree-domain/done';
    input.setAttribute('data-testid', 'mnote-local-folder-path-input');
    input.value = recent.length ? fileRootUriToPathInput(recent[0]) : '';
    input.style.width = '100%';
    input.style.boxSizing = 'border-box';
    input.style.border = '1px solid rgba(27, 28, 28, 0.18)';
    input.style.borderRadius = '6px';
    input.style.padding = '10px 12px';
    input.style.fontSize = '14px';
    var actions = document.createElement('div');
    actions.className = 'mnote-local-folder-dialog__actions';
    actions.style.display = 'flex';
    actions.style.gap = '8px';
    actions.style.justifyContent = 'flex-end';
    var choose = document.createElement('button');
    choose.type = 'button';
    choose.textContent = '选择文件夹';
    choose.setAttribute('data-testid', 'mnote-local-folder-native-picker');
    var cancel = document.createElement('button');
    cancel.type = 'button';
    cancel.textContent = '取消';
    var confirm = document.createElement('button');
    confirm.type = 'button';
    confirm.textContent = '打开';
    confirm.setAttribute('data-testid', 'mnote-local-folder-open-confirm');
    [choose, cancel, confirm].forEach(function(button) {
      button.style.border = '1px solid rgba(27, 28, 28, 0.14)';
      button.style.borderRadius = '6px';
      button.style.padding = '8px 12px';
      button.style.background = '#fff';
      button.style.cursor = 'pointer';
      button.style.fontSize = '14px';
    });
    function submit() {
      var rootUri = pathToFileRootUri(input.value);
      if (!rootUri) {
        status.textContent = '请输入以 / 开头的绝对路径，或 file:// URI。';
        input.focus();
        return;
      }
      closeLocalFolderDialog();
      openLocalFolderRoot(rootUri);
    }
    choose.addEventListener('click', function(event) {
      event.preventDefault();
      requestNativeFolderChoice(status).then(function(selectedPath) {
        if (selectedPath) {
          input.value = selectedPath;
          submit();
        }
      }).catch(function(error) {
        status.textContent = error && error.name === 'AbortError'
          ? '已取消选择。'
          : '无法打开系统文件夹选择器，请输入路径。';
      });
    });
    cancel.addEventListener('click', function(event) {
      event.preventDefault();
      closeLocalFolderDialog();
    });
    confirm.addEventListener('click', function(event) {
      event.preventDefault();
      submit();
    });
    input.addEventListener('keydown', function(event) {
      if (event.key === 'Enter') {
        event.preventDefault();
        submit();
      }
    });
    actions.appendChild(choose);
    actions.appendChild(cancel);
    actions.appendChild(confirm);
    card.appendChild(title);
    card.appendChild(status);
    card.appendChild(input);
    if (recent.length) {
      var recentTitle = document.createElement('div');
      recentTitle.style.fontSize = '12px';
      recentTitle.style.color = '#6b7280';
      recentTitle.textContent = '最近使用';
      card.appendChild(recentTitle);
      var recentList = document.createElement('div');
      recentList.className = 'mnote-local-folder-dialog__recent';
      recent.slice(0, 5).forEach(function(rootUri) {
        var button = document.createElement('button');
        button.type = 'button';
        button.textContent = rootUri.replace(/^file:\/\//, '');
        button.addEventListener('click', function(event) {
          event.preventDefault();
          closeLocalFolderDialog();
          openLocalFolderRoot(rootUri);
        });
        recentList.appendChild(button);
      });
      card.appendChild(recentList);
    }
    card.appendChild(actions);
    dialog.appendChild(card);
    dialog.addEventListener('click', function(event) {
      if (event.target === dialog) closeLocalFolderDialog();
    });
    document.body.appendChild(dialog);
    input.focus();
    input.select();
  }

  function requestOpenLocalFolder() {
    openLocalFolderDialog('');
  }

  function closeWorkspaceSourceMenu() {
    var existing = document.querySelector('[data-testid="mnote-workspace-source-menu"]');
    if (existing && existing.parentElement) existing.parentElement.removeChild(existing);
    document.querySelectorAll('[data-testid="mnote-workspace-source-trigger"]').forEach(function(trigger) {
      if (trigger instanceof HTMLElement) trigger.setAttribute('aria-expanded', 'false');
    });
  }

  function workspaceSourceLabel(rootUri) {
    var label = String(rootUri || '').replace(/^file:\/\//, '');
    try {
      label = decodeURIComponent(label);
    } catch (_) {}
    return label || '本地文件夹';
  }

  function openWorkspaceSourceMenu(trigger) {
    closeWorkspaceSourceMenu();
    if (!(trigger instanceof HTMLElement)) return;
    trigger.setAttribute('aria-expanded', 'true');
    var menu = document.createElement('div');
    menu.className = 'mnote-workspace-source-menu';
    menu.setAttribute('data-testid', 'mnote-workspace-source-menu');
    menu.setAttribute('role', 'menu');
    var cloudButton = document.createElement('button');
    cloudButton.type = 'button';
    cloudButton.className = 'mnote-workspace-source-menu__item';
    cloudButton.setAttribute('data-testid', 'mnote-switch-cloud-workspace');
    cloudButton.setAttribute('role', 'menuitem');
    cloudButton.textContent = '云空间';
    cloudButton.addEventListener('click', function(event) {
      event.preventDefault();
      closeWorkspaceSourceMenu();
      switchToCloudWorkspace();
    });
    menu.appendChild(cloudButton);
    var recent = readRecentLocalRoots();
    if (recent.length) {
      var label = document.createElement('div');
      label.className = 'mnote-workspace-source-menu__label';
      label.textContent = '最近本地文件夹';
      menu.appendChild(label);
      recent.slice(0, 8).forEach(function(rootUri) {
        var button = document.createElement('button');
        button.type = 'button';
        button.className = 'mnote-workspace-source-menu__item';
        button.setAttribute('data-testid', 'mnote-recent-local-root');
        button.setAttribute('data-root-uri', rootUri);
        button.setAttribute('role', 'menuitem');
        button.textContent = workspaceSourceLabel(rootUri);
        button.addEventListener('click', function(event) {
          event.preventDefault();
          closeWorkspaceSourceMenu();
          openLocalFolderRoot(rootUri);
        });
        menu.appendChild(button);
      });
    }
    var openOther = document.createElement('button');
    openOther.type = 'button';
    openOther.className = 'mnote-workspace-source-menu__item mnote-workspace-source-menu__item--primary';
    openOther.setAttribute('data-testid', 'mnote-open-other-local-folder');
    openOther.setAttribute('role', 'menuitem');
    openOther.textContent = '打开其他本地文件夹';
    openOther.addEventListener('click', function(event) {
      event.preventDefault();
      closeWorkspaceSourceMenu();
      requestOpenLocalFolder();
    });
    menu.appendChild(openOther);
    trigger.closest('[data-testid="wolai-workspace-identity"]')?.appendChild(menu);
  }

  function setCommandPending(trigger, pending) {
    if (!(trigger instanceof HTMLElement)) return;
    trigger.setAttribute('data-pending', pending ? 'true' : 'false');
    if ('disabled' in trigger) {
      if (pending) trigger.setAttribute('disabled', 'disabled');
      else trigger.removeAttribute('disabled');
    }
  }

  async function dispatchTreeCommand(trigger, body) {
    setCommandPending(trigger, true);
    var commandBody = Object.assign({}, currentWorkspaceSourcePayload(), body || {});
    try {
      var response = await fetch('/api/tree/commands', {
        method: 'POST',
        headers: { 'content-type': 'application/json' },
        body: JSON.stringify(commandBody)
      });
      var payload = await response.json().catch(function(){ return null; });
      if (!response.ok || !payload || !payload.result) {
        throw new Error((payload && payload.message) || 'tree_command_failed_' + response.status);
      }
      window.dispatchEvent(new CustomEvent('tree:local-command', { detail: { body: commandBody, result: payload.result } }));
      return payload.result;
    } catch (error) {
      setCommandPending(trigger, false);
      if (trigger instanceof HTMLElement) {
        trigger.setAttribute('data-error', error instanceof Error ? error.message : String(error));
      }
      throw error;
    }
  }

  function navigateToDocument(nodeId, workspaceId, options) {
    if (!nodeId) return;
    var treeView = normalizeSidebarTreeMode(options && options.treeView ? options.treeView : activeSidebarTreeMode());
    persistSidebarTreeMode(treeView);
    if (currentDocumentId() === nodeId && window.location.pathname.indexOf('/documents/') === 0) {
      document.querySelectorAll('.tree-row[data-active="true"], .tree-row[data-selected="true"]').forEach(function(row) {
        if (row instanceof HTMLElement) {
          row.setAttribute('data-active', 'false');
          row.setAttribute('data-selected', 'false');
        }
      });
      document.querySelectorAll('.tree-row[data-node-id="' + cssEscape(nodeId) + '"], .tree-row[data-document-id="' + cssEscape(nodeId) + '"], .tree-row[data-doc-id="' + cssEscape(nodeId) + '"]').forEach(function(row) {
        if (row instanceof HTMLElement) {
          if (row.getAttribute('data-shell-mode') === 'filetree') {
            row.setAttribute('data-selected', String(row.getAttribute('data-row-id') === 'index:' + nodeId));
          } else {
            row.setAttribute('data-active', 'true');
          }
        }
      });
      return;
    }
    var targetUrl = new URL('/documents/' + encodeURIComponent(nodeId), window.location.origin);
    if (workspaceId) targetUrl.searchParams.set('workspaceId', workspaceId);
    if (treeView === 'filetree') targetUrl.searchParams.set('treeView', 'filetree');
    copyWorkspaceSourceParams(targetUrl);
    var url = targetUrl.pathname + targetUrl.search;
    if (mnoteNavigationInFlight === url) return;
    if (typeof window.__mnoteDocumentPaneRuntime?.openPrimaryDocument === 'function') {
      mnoteNavigationInFlight = url;
      document.documentElement.setAttribute('data-mnote-navigation-pending', 'true');
      document.documentElement.setAttribute('data-mnote-navigation-target', nodeId);
      window.__mnoteDocumentPaneRuntime.openPrimaryDocument({
        documentId: nodeId,
        workspaceId: workspaceId || '',
        sourceKind: targetUrl.searchParams.get('sourceKind') || 'convex_workspace',
        rootUri: targetUrl.searchParams.get('rootUri') || '',
        url: targetUrl,
      }).then(function(){
        if (mnoteNavigationInFlight === url) mnoteNavigationInFlight = '';
        document.documentElement.removeAttribute('data-mnote-navigation-pending');
      }).catch(function(error){
        console.warn('mnote pane 内导航失败，将回退整页导航', error);
        if (window.__mnoteTreeLiveEventSource && typeof window.__mnoteTreeLiveEventSource.close === 'function') {
          window.__mnoteTreeLiveEventSource.close();
        }
        window.location.assign(url);
      });
      return;
    }
    mnoteNavigationInFlight = url;
    document.documentElement.setAttribute('data-mnote-navigation-pending', 'true');
    document.documentElement.setAttribute('data-mnote-navigation-target', nodeId);
    if (window.__mnoteTreeLiveEventSource && typeof window.__mnoteTreeLiveEventSource.close === 'function') {
      window.__mnoteTreeLiveEventSource.close();
    }
    window.location.assign(url);
  }

  async function createPage(trigger, parentId) {
    var workspaceId = resolveWorkspaceId(trigger);
    var effectiveParentId = (parentId || trigger.getAttribute('data-parent-id') || '').trim();
    if (!workspaceId) return;
    var result = await dispatchTreeCommand(trigger, {
      action: 'create',
      workspaceId: workspaceId,
      parentId: effectiveParentId || null,
      title: '新页面'
    });
    var nextWorkspaceId = result.workspaceId || workspaceId;
    navigateToDocument(result.documentId, nextWorkspaceId, { treeView: activeSidebarTreeMode() });
  }

  function applySidebarTreeTab(mode, shell) {
    mode = persistSidebarTreeMode(mode);
    shell = shell || document.querySelector('[data-testid="wolai-sidebar-page-tree-shell"]');
    if (!shell) return;
    var tabs = shell.querySelectorAll('[data-mnote-sidebar-tree-tab]');
    for (var i = 0; i < tabs.length; i++) {
      var isActive = tabs[i].getAttribute('data-mnote-sidebar-tree-tab') === mode;
      tabs[i].setAttribute('aria-selected', isActive ? 'true' : 'false');
      tabs[i].classList.toggle('wolai-sidebar-tab-active', isActive);
      tabs[i].classList.toggle('wolai-sidebar-tab-muted', !isActive);
    }
    var panels = shell.querySelectorAll('[data-mnote-sidebar-tree-panel]');
    for (var j = 0; j < panels.length; j++) {
      var isCurrentPanel = panels[j].getAttribute('data-mnote-sidebar-tree-panel') === mode;
      panels[j].hidden = !isCurrentPanel;
    }
  }

  function switchSidebarTreeTab(trigger) {
    var mode = trigger ? trigger.getAttribute('data-mnote-sidebar-tree-tab') : 'page';
    applySidebarTreeTab(mode, trigger ? trigger.closest('[data-testid="wolai-sidebar-page-tree-shell"]') : null);
  }

  function restoreSidebarTreeTab() {
    applySidebarTreeTab(readStoredSidebarTreeMode(), null);
  }

  function updateTitleEverywhere(documentId, title) {
    if (!documentId) return;
    var escaped = cssEscape(documentId);
    var escapedDocRowId = cssEscape('doc:' + documentId);
    var selectors = [
      '.tree-row[data-shell-mode="page"][data-node-id="' + escaped + '"] > .tree-link > .tree-link-title',
      '.tree-row[data-shell-mode="filetree"][data-row-id="' + escapedDocRowId + '"] > .tree-link > .tree-link-title',
      '.wolai-page-row[data-node-id="' + escaped + '"] > .wolai-row-title',
      'a[href="/documents/' + escaped + '"] > .wolai-row-title',
      'a[href^="/documents/' + escaped + '?"] > .wolai-row-title'
    ];
    selectors.forEach(function(selector) {
      document.querySelectorAll(selector).forEach(function(node) {
        if (node instanceof HTMLElement) node.textContent = title;
      });
    });
  }

  function readProjection(value) {
    if (!value || typeof value !== 'object') return null;
    if (value.result && typeof value.result === 'object') return value.result;
    if (value.snapshot && value.snapshot.tree) return value.snapshot.tree;
    if (value.data && value.data.tree) return value.data.tree;
    if (value.tree && typeof value.tree === 'object') return value.tree;
    return value;
  }

  function projectionItems(projection) {
    var resolved = readProjection(projection);
    return resolved && Array.isArray(resolved.items) ? resolved.items : [];
  }

  function nodeIdOf(item) {
    return String(item && (item.nodeId || item.id || item.documentId) || '').trim();
  }

  function rowIdOf(item) {
    return String(item && (item.rowId || item.nodeId || item.id) || '').trim();
  }

  function parentIdOf(item) {
    return String(item && (item.parentNodeId || item.parentId || '') || '').trim();
  }

  function titleOf(item) {
    return String(item && item.title || '无标题').trim() || '无标题';
  }

  function groupRowsByParent(rows) {
    var ids = new Set(rows.map(nodeIdOf).filter(Boolean));
    var grouped = new Map();
    rows.forEach(function(item) {
      var parentId = parentIdOf(item);
      if (!ids.has(parentId)) parentId = '';
      if (!grouped.has(parentId)) grouped.set(parentId, []);
      grouped.get(parentId).push(item);
    });
    return grouped;
  }

  function pageTreeChevronSvg() {
    return '<svg class="tree-toggle-icon" viewBox="0 0 20 20" width="20" height="20" aria-hidden="true" focusable="false"><path d="M7.84 14.955c.206 0 .37-.07.505-.21l4.277-4.179a.79.79 0 0 0 .264-.574.78.78 0 0 0-.258-.574L8.35 5.24a.7.7 0 0 0-.51-.21.721.721 0 0 0-.498 1.247l3.814 3.721-3.814 3.709a.721.721 0 0 0 .498 1.248"></path></svg>';
  }

  function renderPageRows(parentId, grouped, activeId, inheritedDepth) {
    var computedDepth = Number(inheritedDepth || 0);
    return (grouped.get(parentId) || []).map(function(item) {
      var nodeId = nodeIdOf(item);
      var title = titleOf(item);
      var depth = computedDepth;
      var parent = parentIdOf(item);
      var children = grouped.get(nodeId) || [];
      var expandable = Boolean(item.expandable || item.childCount > 0 || children.length);
      var expanded = expandable && item.expandedByDefault !== false;
      var toggle = expandable
        ? '<button type="button" class="tree-toggle" data-testid="tree-node-toggle" data-rust-action="toggle" data-node-id="' + escapeHtml(nodeId) + '" aria-label="' + (expanded ? '折叠 ' : '展开 ') + escapeHtml(title) + '" aria-expanded="' + String(expanded) + '">' + pageTreeChevronSvg() + '</button>'
        : '<span class="tree-spacer" aria-hidden="true"></span>';
      var childHtml = expandable && expanded
        ? '<ul class="tree-children">' + renderPageRows(nodeId, grouped, activeId, depth + 1) + '</ul>'
        : '';
      var currentAttr = nodeId === activeId ? ' aria-current="page" aria-selected="true"' : ' aria-selected="false"';
      return '<li class="tree-node" data-node-id="' + escapeHtml(nodeId) + '"><div class="tree-row" role="treeitem" aria-level="' + (depth + 1) + '" aria-expanded="' + String(expandable && expanded) + '" data-rust-rendered-row="page" data-testid="wolai-sidebar-row" data-tree-testid="tree-node-open" data-node-id="' + escapeHtml(nodeId) + '"' + (parent ? ' data-parent-id="' + escapeHtml(parent) + '"' : '') + ' data-depth="' + depth + '" data-shell-mode="page" data-active="' + String(nodeId === activeId) + '"' + currentAttr + ' data-focused="false" data-draggable="true" draggable="true" tabindex="-1">' + toggle + '<button type="button" class="tree-link" data-testid="tree-node-open" data-rust-action="open" data-node-id="' + escapeHtml(nodeId) + '"><span class="tree-link-title">' + escapeHtml(title) + '</span></button><div class="tree-actions"><button type="button" class="tree-action" data-testid="tree-action-menu" data-rust-action="menu" data-node-id="' + escapeHtml(nodeId) + '" aria-label="更多操作">…</button><button type="button" class="tree-action" data-testid="tree-action-create" data-rust-action="create" data-node-id="' + escapeHtml(nodeId) + '" aria-label="新建子页面">+</button></div></div>' + childHtml + '</li>';
    }).join('');
  }

  function renderPageProjection(projection) {
    var tree = document.getElementById('sidebar-tree-root');
    if (!tree) return false;
    var rows = projectionItems(projection).filter(function(item) {
      return String(item.rowKind || 'document') === 'document';
    });
    var activeId = currentDocumentId();
    tree.innerHTML = '<ul class="tree-root" role="tree" data-rust-page-renderer="initial_v1">' + (rows.length ? renderPageRows('', groupRowsByParent(rows), activeId, 0) : '<li class="tree-empty" data-rust-rendered-row="page-empty">暂无页面</li>') + '</ul>';
    return true;
  }

  function fileDocumentId(item) {
    var meta = item && item.resourceMeta && typeof item.resourceMeta === 'object' ? item.resourceMeta : {};
    if (meta.documentId) return String(meta.documentId).trim();
    if (item && item.documentId) return String(item.documentId).trim();
    if (item && item.rowKind === 'document') return nodeIdOf(item);
    if (item && item.rowKind === 'index') return nodeIdOf(item).replace(/^index:/, '');
    return '';
  }

  function fileAssetId(item) {
    var meta = item && item.resourceMeta && typeof item.resourceMeta === 'object' ? item.resourceMeta : {};
    if (meta.assetId) return String(meta.assetId).trim();
    if (item && item.assetId) return String(item.assetId).trim();
    if (item && item.rowKind === 'asset') return nodeIdOf(item).replace(/^asset:/, '');
    return '';
  }

  function iconKindOf(item) {
    return String(item && (item.iconHint || item.rowKind || 'file') || 'file').trim() || 'file';
  }

  function renderFileRows(parentId, grouped, activeId) {
    return (grouped.get(parentId) || []).map(function(item) {
      var nodeId = nodeIdOf(item);
      var rowId = rowIdOf(item);
      var rowKind = String(item.rowKind || 'document');
      var title = titleOf(item);
      var depth = Number(item.depth || 0);
      var parent = parentIdOf(item);
      var documentId = fileDocumentId(item);
      var assetId = fileAssetId(item);
      var children = grouped.get(nodeId) || [];
      var expandable = Boolean(item.expandable || item.childCount > 0 || children.length);
      var expanded = expandable && item.expandedByDefault !== false;
      var selected = rowId === 'index:' + activeId;
      var testId = rowKind === 'document' ? 'filetree-doc-row' : rowKind === 'index' ? 'filetree-index-row' : 'filetree-asset-row';
      var toggle = expandable
        ? '<button type="button" class="tree-toggle" data-testid="filetree-toggle" data-rust-action="toggle" data-row-id="' + escapeHtml(rowId) + '" aria-label="' + (expanded ? '折叠 ' : '展开 ') + escapeHtml(title) + '">' + (expanded ? '▾' : '▸') + '</button>'
        : '<span class="tree-spacer" aria-hidden="true"></span>';
      var createAction = rowKind === 'document'
        ? '<button type="button" class="tree-action" data-testid="filetree-create" data-rust-action="create" data-row-id="' + escapeHtml(rowId) + '" data-node-id="' + escapeHtml(documentId || nodeId) + '" aria-label="新建子页面">+</button>'
        : '';
      var childHtml = expandable && expanded
        ? '<ul class="tree-children">' + renderFileRows(nodeId, grouped, activeId) + '</ul>'
        : '';
      return '<li class="tree-node" data-node-id="' + escapeHtml(nodeId) + '"><div class="tree-row" role="treeitem" aria-level="' + (depth + 1) + '" aria-expanded="' + String(expandable && expanded) + '" data-rust-rendered-row="filetree" data-testid="' + testId + '" data-row-id="' + escapeHtml(rowId) + '" data-row-kind="' + escapeHtml(rowKind) + '" data-node-id="' + escapeHtml(nodeId) + '"' + (parent ? ' data-parent-id="' + escapeHtml(parent) + '"' : '') + ' data-document-id="' + escapeHtml(documentId) + '" data-doc-id="' + escapeHtml(documentId) + '" data-asset-id="' + escapeHtml(assetId) + '" data-shell-mode="filetree" data-selected="' + String(selected) + '" data-active="false" draggable="true">' + toggle + '<span class="tree-kind-badge" data-kind="' + escapeHtml(iconKindOf(item)) + '" aria-hidden="true"></span><button type="button" class="tree-link" data-rust-action="open" data-row-id="' + escapeHtml(rowId) + '" data-document-id="' + escapeHtml(documentId) + '" data-asset-id="' + escapeHtml(assetId) + '"><span class="tree-link-title">' + escapeHtml(title) + '</span></button><div class="tree-actions">' + createAction + '<button type="button" class="tree-action" data-testid="filetree-action-menu" data-rust-action="menu" data-row-id="' + escapeHtml(rowId) + '" aria-label="更多操作">…</button></div></div>' + childHtml + '</li>';
    }).join('');
  }

  function renderFileProjection(projection) {
    var tree = document.getElementById('sidebar-file-tree-root');
    if (!tree) return false;
    var rows = projectionItems(projection);
    var activeId = currentDocumentId();
    tree.innerHTML = '<ul class="tree-root" role="tree" data-rust-filetree-renderer="initial_v1">' + (rows.length ? renderFileRows('', groupRowsByParent(rows), activeId) : '<li class="tree-empty" data-rust-rendered-row="filetree-empty">暂无文件或页面</li>') + '</ul>';
    return true;
  }

  async function fetchProjection(path, workspaceId) {
    var url = new URL(path, window.location.origin);
    url.searchParams.set('workspaceId', workspaceId || 'default');
    url.searchParams.set('depth', '99');
    var response = await fetch(url.toString(), { cache: 'no-store' });
    var payload = await response.json().catch(function(){ return null; });
    if (!response.ok || !payload || !payload.result) throw new Error('tree_projection_failed_' + response.status);
    return payload.result;
  }

  function scheduleProjectionRefresh(workspaceId) {
    if (projectionRefreshTimer) window.clearTimeout(projectionRefreshTimer);
    projectionRefreshTimer = window.setTimeout(function() {
      projectionRefreshTimer = 0;
      var resolvedWorkspaceId = workspaceId || resolveWorkspaceId(document.body);
      Promise.all([
        fetchProjection('/api/tree/projections/sidebar', resolvedWorkspaceId).then(renderPageProjection),
        fetchProjection('/api/tree/projections/file', resolvedWorkspaceId).then(renderFileProjection)
      ]).then(function() {
        document.documentElement.setAttribute('data-mnote-tree-live-applied', 'true');
      }).catch(function(error) {
        document.documentElement.setAttribute('data-mnote-tree-live-apply-error', error instanceof Error ? error.message : String(error));
      });
    }, 180);
  }

  function toggleChildren(row, button) {
    var li = row && row.parentElement;
    var children = li ? li.querySelector(':scope > .tree-children') : null;
    if (!children) return;
    children.classList.toggle('tree-children--collapsed');
    var collapsed = children.classList.contains('tree-children--collapsed');
    row.setAttribute('aria-expanded', collapsed ? 'false' : 'true');
    if (button && button.getAttribute('data-testid') === 'tree-node-toggle') {
      button.setAttribute('aria-expanded', collapsed ? 'false' : 'true');
    } else if (button) {
      button.textContent = collapsed ? '▸' : '▾';
    }
  }

  function dispatchSidebarEvent(name, detail) {
    document.documentElement.setAttribute('data-mnote-last-tree-action', name);
    window.dispatchEvent(new CustomEvent(name, { detail: detail }));
  }

  function rowTitle(row) {
    var title = row ? row.querySelector(':scope > .tree-link > .tree-link-title') : null;
    return title && title.textContent ? title.textContent.trim() : '无标题';
  }

  function rowCenter(row) {
    var rect = row.getBoundingClientRect();
    return { x: rect.left + Math.min(rect.width - 12, 180), y: rect.top + Math.min(rect.height, 22) };
  }

  function closeTreeContextMenu() {
    if (activeTreeContextMenu && activeTreeContextMenu.parentElement) {
      activeTreeContextMenu.parentElement.removeChild(activeTreeContextMenu);
    }
    activeTreeContextMenu = null;
  }

  function copyTreeContextValue(value, actionName) {
    var text = String(value || '');
    var done = function() {
      document.documentElement.setAttribute('data-mnote-tree-context-last-copy', actionName || 'copy');
    };
    if (navigator.clipboard && typeof navigator.clipboard.writeText === 'function') {
      return navigator.clipboard.writeText(text).then(done).catch(function(){});
    }
    var textarea = document.createElement('textarea');
    textarea.value = text;
    textarea.setAttribute('readonly', 'readonly');
    textarea.style.position = 'fixed';
    textarea.style.left = '-9999px';
    document.body.appendChild(textarea);
    textarea.select();
    try { document.execCommand('copy'); } catch (_) {}
    document.body.removeChild(textarea);
    done();
    return Promise.resolve();
  }

  function documentHref(documentId, workspaceId) {
    var url = new URL('/documents/' + encodeURIComponent(documentId), window.location.origin);
    if (workspaceId) url.searchParams.set('workspaceId', workspaceId);
    copyWorkspaceSourceParams(url);
    return url.toString();
  }

  function openTreePicker(mode, detail) {
    var url = new URL('/tree', window.location.origin);
    url.searchParams.set('mode', 'picker');
    url.searchParams.set('allowRootPick', '1');
    url.searchParams.set('intent', mode);
    if (detail.workspaceId) url.searchParams.set('workspaceId', detail.workspaceId);
    if (detail.documentId) {
      url.searchParams.set('sourceDocumentId', detail.documentId);
      url.searchParams.set('excludeIds', detail.documentId);
    }
    window.location.assign(url.pathname + url.search);
  }

  function convertToPreviousSiblingChild(trigger, detail) {
    var documentId = detail.documentId || '';
    var row = document.querySelector('#sidebar-tree-root .tree-row[data-node-id="' + cssEscape(documentId) + '"]');
    if (!(row instanceof HTMLElement)) return;
    var parentId = row.getAttribute('data-parent-id') || '';
    var siblings = Array.from(document.querySelectorAll('#sidebar-tree-root .tree-row[data-shell-mode="page"]')).filter(function(candidate) {
      return (candidate.getAttribute('data-parent-id') || '') === parentId;
    });
    var index = siblings.indexOf(row);
    if (index <= 0) {
      window.alert('当前页面前面没有同级页面。');
      return;
    }
    var previous = siblings[index - 1];
    var previousId = previous.getAttribute('data-node-id') || '';
    var children = previous.parentElement ? previous.parentElement.querySelectorAll(':scope > .tree-children > .tree-node > .tree-row[data-shell-mode="page"]') : [];
    void dispatchTreeCommand(trigger || row, {
      action: 'move',
      workspaceId: detail.workspaceId || resolveWorkspaceId(row),
      documentId: documentId,
      parentId: previousId,
      sortOrder: children.length
    }).then(function(){ scheduleProjectionRefresh(detail.workspaceId || resolveWorkspaceId(row)); });
  }

  function handleTreeContextMenuAction(action, detail, trigger) {
    closeTreeContextMenu();
    var documentId = detail.documentId || '';
    var workspaceId = detail.workspaceId || resolveWorkspaceId(trigger || document.body);
    var title = detail.title || '无标题';
    if (action === 'open-right') {
      dispatchSidebarEvent('tree.page.open-right', detail);
      return;
    }
    if (action === 'share') {
      dispatchSidebarEvent('tree.page.share', detail);
      return;
    }
    if (action === 'move') {
      openTreePicker('move', detail);
      return;
    }
    if (action === 'embed') {
      openTreePicker('embed', detail);
      return;
    }
    if (action === 'copy-link') {
      void copyTreeContextValue(documentHref(documentId, workspaceId), 'copy-link');
      return;
    }
    if (action === 'copy-link-title') {
      void copyTreeContextValue(title + ' ' + documentHref(documentId, workspaceId), 'copy-link-title');
      return;
    }
    if (action === 'copy-reference-inline') {
      void copyTreeContextValue('((' + title + ' ' + documentId + '))', 'copy-reference-inline');
      return;
    }
    if (action === 'copy-reference-embed') {
      void copyTreeContextValue('{{' + title + ' ' + documentId + '}}', 'copy-reference-embed');
      return;
    }
    if (action === 'copy-id') {
      void copyTreeContextValue(documentId || detail.assetId || detail.rowId || '', 'copy-id');
      return;
    }
    if (action === 'duplicate') {
      dispatchSidebarEvent('tree.page.duplicate', detail);
      return;
    }
    if (action === 'rename') {
      var nextTitle = window.prompt('重命名页面', title);
      if (nextTitle && nextTitle.trim() && documentId) {
        void dispatchTreeCommand(trigger || document.body, {
          action: 'rename',
          workspaceId: workspaceId,
          documentId: documentId,
          title: nextTitle.trim()
        }).then(function(){ updateTitleEverywhere(documentId, nextTitle.trim()); });
      }
      return;
    }
    if (action === 'create-child') {
      void createPage(trigger || document.body, documentId);
      return;
    }
    if (action === 'convert-child') {
      convertToPreviousSiblingChild(trigger, detail);
      return;
    }
    if (action === 'delete-trash' && documentId) {
      if (!window.confirm('确定要将“' + title + '”删除到垃圾桶吗？')) return;
      void dispatchTreeCommand(trigger || document.body, {
        action: 'purge',
        workspaceId: workspaceId,
        documentId: documentId
      }).then(function(){ scheduleProjectionRefresh(workspaceId); });
    }
  }

  function appendTreeContextMenuButton(menu, item, detail, trigger) {
    if (item.separator) {
      var sep = document.createElement('div');
      sep.className = 'mnote-tree-context-menu__separator';
      sep.setAttribute('role', 'separator');
      menu.appendChild(sep);
      return;
    }
    var button = document.createElement('button');
    button.type = 'button';
    button.className = item.danger ? 'mnote-tree-context-menu__item mnote-tree-context-menu__item--danger' : 'mnote-tree-context-menu__item';
    button.setAttribute('role', 'menuitem');
    button.setAttribute('data-action', item.action);
    button.disabled = item.disabled === true;
    var icon = document.createElement('span');
    icon.className = 'material-symbols-outlined mnote-tree-context-menu__icon';
    icon.setAttribute('aria-hidden', 'true');
    icon.setAttribute('data-icon', item.icon || 'radio_button_unchecked');
    var label = document.createElement('span');
    label.className = 'mnote-tree-context-menu__label';
    label.textContent = item.label;
    button.appendChild(icon);
    button.appendChild(label);
    if (item.shortcut) {
      var shortcut = document.createElement('span');
      shortcut.className = 'mnote-tree-context-menu__shortcut';
      shortcut.textContent = item.shortcut;
      button.appendChild(shortcut);
    }
    button.addEventListener('click', function(event) {
      event.preventDefault();
      event.stopPropagation();
      handleTreeContextMenuAction(item.action, detail, trigger);
    });
    menu.appendChild(button);
  }

  function openTreeContextMenu(kind, detail, x, y, trigger) {
    closeTreeContextMenu();
    var menu = document.createElement('div');
    menu.className = 'mnote-tree-context-menu';
    menu.setAttribute('role', 'menu');
    menu.setAttribute('data-testid', 'mnote-tree-context-menu');
    menu.setAttribute('data-kind', kind);
    var isAsset = kind === 'filetree' && detail.assetId && detail.rowKind !== 'document' && detail.rowKind !== 'index';
    var items = isAsset ? [
      { action: 'open-right', icon: 'open_in_new', label: '在右侧边栏打开', shortcut: 'Alt + O' },
      { action: 'move', icon: 'drive_file_move', label: '移动到...' },
      { action: 'copy-id', icon: 'tag', label: '复制资源 ID' }
    ] : [
      { action: 'open-right', icon: 'right_panel_open', label: '在右侧边栏打开', shortcut: 'Alt+' },
      { separator: true },
      { action: 'move', icon: 'drive_file_move', label: '移动到...' },
      { action: 'embed', icon: 'account_tree', label: '嵌入到...' },
      { separator: true },
      { action: 'copy-link', icon: 'link', label: '复制访问链接' },
      { action: 'copy-reference-inline', icon: 'content_copy', label: '复制页面引用链接' },
      { action: 'copy-id', icon: 'tag', label: '复制页面ID' },
      { separator: true },
      { action: 'duplicate', icon: 'file_copy', label: '拷贝副本' },
      { separator: true },
      { action: 'rename', icon: 'edit', label: '重命名' },
      { separator: true },
      { action: 'delete-trash', icon: 'delete', label: '删除', shortcut: 'Del', danger: true }
    ];
    items.forEach(function(item) { appendTreeContextMenuButton(menu, item, detail, trigger); });
    document.body.appendChild(menu);
    var rect = menu.getBoundingClientRect();
    var left = Math.min(Math.max(8, x || 8), Math.max(8, window.innerWidth - rect.width - 8));
    var top = Math.min(Math.max(8, y || 8), Math.max(8, window.innerHeight - rect.height - 8));
    menu.style.left = left + 'px';
    menu.style.top = top + 'px';
    activeTreeContextMenu = menu;
  }

  function openPageTreeContextMenu(row, x, y, trigger) {
    if (!(row instanceof HTMLElement)) return;
    var documentId = row.getAttribute('data-node-id') || '';
    openTreeContextMenu('page', {
      documentId: documentId,
      rowId: documentId,
      rowKind: 'document',
      title: rowTitle(row),
      workspaceId: resolveWorkspaceId(row)
    }, x, y, trigger || row);
  }

  function openFileTreeContextMenu(row, x, y, trigger) {
    if (!(row instanceof HTMLElement)) return;
    var documentId = row.getAttribute('data-document-id') || row.getAttribute('data-doc-id') || '';
    openTreeContextMenu('filetree', {
      documentId: documentId,
      rowId: row.getAttribute('data-row-id') || '',
      rowKind: row.getAttribute('data-row-kind') || '',
      assetId: row.getAttribute('data-asset-id') || '',
      title: rowTitle(row),
      workspaceId: resolveWorkspaceId(row)
    }, x, y, trigger || row);
  }

  function visibleFileTreeRows() {
    return Array.from(document.querySelectorAll('#sidebar-file-tree-root .tree-row[data-shell-mode="filetree"]'))
      .filter(function(row) { return row instanceof HTMLElement && row.offsetParent !== null; });
  }

  function syncSidebarFileTreeSelection() {
    var rows = visibleFileTreeRows();
    rows.forEach(function(row) {
      var rowId = row.getAttribute('data-row-id') || '';
      row.setAttribute('data-selected', String(Boolean(rowId && sidebarFileTreeSelection.selectedRowIds.has(rowId))));
      row.setAttribute('data-focused', String(rowId === sidebarFileTreeSelection.focusedRowId));
    });
    window.dispatchEvent(new CustomEvent('tree.filetree.selection.changed', {
      detail: {
        selectedRowIds: Array.from(sidebarFileTreeSelection.selectedRowIds),
        anchorRowId: sidebarFileTreeSelection.anchorRowId,
        focusedRowId: sidebarFileTreeSelection.focusedRowId
      }
    }));
  }

  function selectSidebarFileTreeRow(row, modifiers) {
    if (!(row instanceof HTMLElement)) return [];
    var rowId = row.getAttribute('data-row-id') || '';
    if (!rowId) return [];
    var rows = visibleFileTreeRows();
    var visibleRowIds = rows.map(function(item) { return item.getAttribute('data-row-id') || ''; }).filter(Boolean);
    var selected = new Set(sidebarFileTreeSelection.selectedRowIds);
    var shiftKey = Boolean(modifiers && modifiers.shiftKey);
    var ctrlKey = Boolean(modifiers && (modifiers.ctrlKey || modifiers.metaKey));
    if (shiftKey && sidebarFileTreeSelection.anchorRowId) {
      var anchorIndex = visibleRowIds.indexOf(sidebarFileTreeSelection.anchorRowId);
      var targetIndex = visibleRowIds.indexOf(rowId);
      if (anchorIndex >= 0 && targetIndex >= 0) {
        selected = new Set(visibleRowIds.slice(Math.min(anchorIndex, targetIndex), Math.max(anchorIndex, targetIndex) + 1));
      } else {
        selected = new Set([rowId]);
        sidebarFileTreeSelection.anchorRowId = rowId;
      }
    } else if (ctrlKey) {
      if (selected.has(rowId) && selected.size > 1) selected.delete(rowId);
      else selected.add(rowId);
      sidebarFileTreeSelection.anchorRowId = rowId;
    } else {
      selected = new Set([rowId]);
      sidebarFileTreeSelection.anchorRowId = rowId;
    }
    sidebarFileTreeSelection.selectedRowIds = selected;
    sidebarFileTreeSelection.focusedRowId = rowId;
    syncSidebarFileTreeSelection();
    return Array.from(selected);
  }

  function selectedSidebarFileTreeRowIdsForDrag(row) {
    var rowId = row instanceof HTMLElement ? row.getAttribute('data-row-id') || '' : '';
    if (rowId && sidebarFileTreeSelection.selectedRowIds.has(rowId)) {
      return Array.from(sidebarFileTreeSelection.selectedRowIds);
    }
    return rowId ? [rowId] : [];
  }

  function ensureSearchModal() {
    var existing = document.querySelector('[data-testid="wolai-search-modal"]');
    if (existing instanceof HTMLElement) return existing;

    var overlay = document.createElement('div');
    overlay.className = 'wolai-search-overlay';
    overlay.setAttribute('data-testid', 'wolai-search-modal');
    overlay.setAttribute('role', 'dialog');
    overlay.setAttribute('aria-modal', 'true');
    overlay.hidden = true;

    overlay.innerHTML = '' +
      '<div class="wolai-search-dialog">' +
        '<div class="wolai-search-input-row">' +
          '<span class="material-symbols-outlined wolai-search-input-icon" data-icon="search" aria-hidden="true"></span>' +
          '<input data-testid="wolai-search-input" class="wolai-search-input" type="search" autocomplete="off" placeholder="在当前工作区中搜索" />' +
          '<button type="button" class="wolai-search-close" data-testid="wolai-search-close" aria-label="关闭搜索">×</button>' +
        '</div>' +
        '<div class="wolai-search-options" data-testid="wolai-search-options" aria-label="搜索选项" hidden>' +
          '<div class="wolai-search-options-left">' +
            '<span class="wolai-search-switch-control"><span>仅匹配标题</span><button type="button" class="wolai-search-switch" data-search-switch="title" role="switch" aria-checked="false" aria-label="仅匹配标题"></button></span>' +
            '<span class="wolai-search-switch-control"><span>精确匹配</span><button type="button" class="wolai-search-switch" data-search-switch="exact" role="switch" aria-checked="false" aria-label="精确匹配"></button></span>' +
            '<span class="wolai-search-sort-control"><span>按编辑时间</span><button type="button" class="wolai-search-sort-value" data-search-sort="updated" aria-label="按编辑时间范围">所有</button></span>' +
            '<span class="wolai-search-sort-control"><span>按创建时间</span><button type="button" class="wolai-search-sort-value" data-search-sort="created" aria-label="按创建时间范围">所有</button></span>' +
          '</div>' +
          '<div class="wolai-search-options-right">' +
            '<span class="wolai-search-switch-control"><span>页面内搜索</span><button type="button" class="wolai-search-switch" data-search-switch="page" role="switch" aria-checked="false" aria-label="页面内搜索"></button></span>' +
          '</div>' +
        '</div>' +
        '<div class="wolai-search-result-meta" data-testid="wolai-search-result-meta"></div>' +
        '<div class="wolai-search-results" data-testid="wolai-search-results" data-search-results-owner="rust-kernel"></div>' +
      '</div>';

    document.body.appendChild(overlay);
    var input = overlay.querySelector('[data-testid="wolai-search-input"]');
    var closeButton = overlay.querySelector('[data-testid="wolai-search-close"]');
    if (input) input.addEventListener('input', scheduleSearchResultsRender);
    overlay.querySelectorAll('[data-search-switch]').forEach(function(button) {
      button.addEventListener('click', function() {
        var isOn = button.getAttribute('aria-checked') !== 'true';
        button.setAttribute('aria-checked', isOn ? 'true' : 'false');
        button.classList.toggle('is-on', isOn);
        scheduleSearchResultsRender();
      });
    });
    if (closeButton) closeButton.addEventListener('click', closeSearchModal);
    overlay.addEventListener('click', function(event) {
      if (event.target === overlay) closeSearchModal();
    });
    return overlay;
  }

  var activeSearchRequestId = 0;
  var searchRenderTimer = 0;

  function searchText(value) {
    return String(value == null ? '' : value).replace(/\s+/g, ' ').trim();
  }

  function currentWorkspaceName() {
    var name = document.querySelector('.sidebar-workspace-name');
    return searchText(name && name.textContent) || '当前工作区';
  }

  function currentDocumentId() {
    var shell = document.querySelector('.document-shell[data-document-id]');
    var bodyId = document.body && document.body.getAttribute('data-document-id');
    return searchText(shell && shell.getAttribute('data-document-id')) || searchText(bodyId);
  }

  function searchSwitchValue(overlay, name) {
    var button = overlay.querySelector('[data-search-switch="' + name + '"]');
    return button instanceof HTMLElement && button.getAttribute('aria-checked') === 'true';
  }

  function highlightedHtml(value) {
    return escapeHtml(value)
      .replace(/&lt;mark&gt;/g, '<mark>')
      .replace(/&lt;\/mark&gt;/g, '</mark>');
  }

  function highlightSearchTitle(title, query) {
    var cleanTitle = searchText(title);
    var cleanQuery = searchText(query);
    if (!cleanQuery) return escapeHtml(cleanTitle);
    var index = cleanTitle.toLowerCase().indexOf(cleanQuery.toLowerCase());
    if (index < 0) return escapeHtml(cleanTitle);
    return escapeHtml(cleanTitle.slice(0, index)) +
      '<mark>' + escapeHtml(cleanTitle.slice(index, index + cleanQuery.length)) + '</mark>' +
      escapeHtml(cleanTitle.slice(index + cleanQuery.length));
  }

  function renderSearchRecentState(overlay) {
    var options = overlay.querySelector('[data-testid="wolai-search-options"]');
    var meta = overlay.querySelector('[data-testid="wolai-search-result-meta"]');
    var results = overlay.querySelector('[data-testid="wolai-search-results"]');
    if (options instanceof HTMLElement) options.hidden = true;
    if (meta) meta.innerHTML = '<span>最近浏览</span><span>Ctrl + Enter 新窗口打开 / Alt + Enter 右侧边栏打开</span>';
    if (results) {
      results.innerHTML = '<div class="wolai-search-recent" data-testid="wolai-search-recent">暂无最近浏览</div>';
    }
  }

  function scheduleSearchResultsRender() {
    window.clearTimeout(searchRenderTimer);
    searchRenderTimer = window.setTimeout(function() { void renderSearchResults(); }, 120);
  }

  async function renderSearchResults() {
    var overlay = document.querySelector('[data-testid="wolai-search-modal"]');
    if (!(overlay instanceof HTMLElement)) return;
    var input = overlay.querySelector('[data-testid="wolai-search-input"]');
    var options = overlay.querySelector('[data-testid="wolai-search-options"]');
    var meta = overlay.querySelector('[data-testid="wolai-search-result-meta"]');
    var results = overlay.querySelector('[data-testid="wolai-search-results"]');
    if (!input || !meta || !results) return;
    var query = searchText(input.value);
    if (!query) {
      activeSearchRequestId += 1;
      renderSearchRecentState(overlay);
      return;
    }
    if (options instanceof HTMLElement) options.hidden = false;
    var requestId = ++activeSearchRequestId;
    meta.innerHTML = '<span>搜索中…</span><span>Ctrl + Enter 新窗口打开 / Alt + Enter 右侧边栏打开</span>';
    results.innerHTML = '<div class="wolai-search-empty" data-search-loading="true">搜索中…</div>';
    try {
      var response = await fetch('/api/search/documents', {
        method: 'POST',
        headers: { 'content-type': 'application/json' },
        body: JSON.stringify({
          workspaceId: resolveWorkspaceId(document.body),
          documentId: currentDocumentId() || null,
          query: query,
          limit: 30,
          filters: {
            titleOnly: searchSwitchValue(overlay, 'title'),
            exact: searchSwitchValue(overlay, 'exact'),
            includeOcr: false,
            onlyCurrentPage: searchSwitchValue(overlay, 'page'),
            timeRange: 'any',
            timeField: 'updated'
          }
        })
      });
      var payload = await response.json();
      if (requestId !== activeSearchRequestId) return;
      var items = Array.isArray(payload.results) ? payload.results : [];
      meta.innerHTML = '<span>共 ' + items.length + ' 条匹配结果</span><span>Ctrl + Enter 新窗口打开 / Alt + Enter 右侧边栏打开</span>';
      if (!items.length) {
        results.innerHTML = '<div class="wolai-search-empty" data-search-empty="true">没有搜索结果</div>';
        return;
      }
      results.innerHTML = items.map(function(item) {
        var title = searchText(item.title || item.name || item.documentTitle || '无标题');
        var snippet = searchText(item.snippet || (Array.isArray(item.evidence) && item.evidence[0] && item.evidence[0].snippet) || '');
        var path = searchText(item.path || item.parentTitle || item.workspaceName || currentWorkspaceName());
        return '<button type="button" class="wolai-search-result-row" data-testid="wolai-search-result-row" data-search-result-owner="rust-kernel" data-document-id="' + escapeHtml(item.documentId || item.nodeId || item.id || '') + '">' +
          '<span class="material-symbols-outlined wolai-search-result-icon" data-icon="article" aria-hidden="true"></span>' +
          '<span class="wolai-search-result-main"><span class="wolai-search-result-title">' + highlightSearchTitle(title, query) + '</span>' +
          '<span class="wolai-search-result-snippet">' + (snippet ? highlightedHtml(snippet) : escapeHtml(path)) + '</span></span>' +
        '</button>';
      }).join('');
    } catch (error) {
      if (requestId !== activeSearchRequestId) return;
      meta.innerHTML = '<span>共 0 条匹配结果</span><span>Ctrl + Enter 新窗口打开 / Alt + Enter 右侧边栏打开</span>';
      results.innerHTML = '<div class="wolai-search-empty" data-search-empty="true">没有搜索结果</div>';
    }
  }

  function isSearchModalOpen() {
    var overlay = document.querySelector('[data-testid="wolai-search-modal"]');
    return overlay instanceof HTMLElement && !overlay.hidden;
  }

  function openSearchModal() {
    var overlay = ensureSearchModal();
    overlay.hidden = false;
    document.documentElement.setAttribute('data-mnote-search-modal-open', 'true');
    var input = overlay.querySelector('[data-testid="wolai-search-input"]');
    if (input) input.setAttribute('placeholder', '在 ' + currentWorkspaceName() + ' 中搜索');
    void renderSearchResults();
    if (input) {
      setTimeout(function() { input.focus(); input.select(); }, 0);
    }
  }

  function closeSearchModal() {
    var overlay = document.querySelector('[data-testid="wolai-search-modal"]');
    if (overlay instanceof HTMLElement) overlay.hidden = true;
    document.documentElement.removeAttribute('data-mnote-search-modal-open');
  }

  function toggleSearchModal() {
    if (isSearchModalOpen()) closeSearchModal();
    else openSearchModal();
  }

  function updatePageSettingsTriggerState() {
    var trigger = document.querySelector('[data-testid="wolai-page-settings-trigger"]');
    if (!(trigger instanceof HTMLElement)) return;
    trigger.setAttribute('data-state', pageUiState.pageSettingsOpen ? 'open' : 'closed');
    trigger.setAttribute('aria-expanded', pageUiState.pageSettingsOpen ? 'true' : 'false');
  }

  function updatePageAiTriggerState() {
    var trigger = document.querySelector('[data-testid="wolai-floating-ai"]');
    if (!(trigger instanceof HTMLElement)) return;
    trigger.setAttribute('data-state', pageUiState.pageAiOpen ? 'open' : 'closed');
    trigger.setAttribute('aria-expanded', pageUiState.pageAiOpen ? 'true' : 'false');
  }

  function createPageOptionRow(key, type) {
    var inputType = type || 'checkbox';
    var supported = pageOptionIsSupported(key);
    if (inputType === 'checkbox') {
      return '' +
        '<label class="wolai-page-setting-row' + (supported ? '' : ' is-pending') + '" data-page-setting-row="' + key + '">' +
          '<span class="wolai-page-setting-copy">' +
            '<span class="wolai-page-setting-label">' + escapeHtml(pageOptionDescription(key)) + '</span>' +
            '<span class="wolai-page-setting-hint">' + escapeHtml(pageOptionHint(key)) + '</span>' +
          '</span>' +
          '<input type="checkbox" class="wolai-page-setting-checkbox" data-page-option-checkbox="' + key + '"' + (supported ? '' : ' data-setting-pending="true"') + ' />' +
        '</label>';
    }
    return '' +
      '<label class="wolai-page-setting-row" data-page-setting-row="' + key + '">' +
        '<span class="wolai-page-setting-copy">' +
          '<span class="wolai-page-setting-label">' + escapeHtml(pageOptionDescription(key)) + '</span>' +
          '<span class="wolai-page-setting-hint">' + escapeHtml(pageOptionHint(key)) + '</span>' +
        '</span>' +
        '<select class="wolai-page-setting-select" data-page-option-select="' + key + '">' +
          '<option value="compact">紧凑</option>' +
          '<option value="normal">默认</option>' +
          '<option value="spacious">宽松</option>' +
        '</select>' +
      '</label>';
  }

  function createGlobalHeadingNumbersRow() {
    return '' +
      '<label class="wolai-page-setting-row" data-page-setting-row="globalShowHeadingNumbers">' +
        '<span class="wolai-page-setting-copy">' +
          '<span class="wolai-page-setting-label">标题自动编号</span>' +
        '</span>' +
        '<input type="checkbox" class="wolai-page-setting-checkbox" data-global-option-checkbox="showHeadingNumbers" />' +
      '</label>';
  }

  function renderGlobalOptions(popover) {
    var globalHeadingNumbers = readGlobalShowHeadingNumbers();
    popover.querySelectorAll('[data-global-option-checkbox="showHeadingNumbers"]').forEach(function(input) {
      input.checked = globalHeadingNumbers;
    });
  }

  function createPageFontRow() {
    return '' +
      '<label class="wolai-page-setting-row" data-page-setting-row="pageFont">' +
        '<span class="wolai-page-setting-copy">' +
          '<span class="wolai-page-setting-label">页面字体</span>' +
          '<span class="wolai-page-setting-hint">已接通：仅对当前页面生效</span>' +
        '</span>' +
        '<select class="wolai-page-setting-select" data-page-option-select="pageFont">' +
          '<option value="default">默认</option>' +
          '<option value="song">宋体</option>' +
          '<option value="kai">楷体</option>' +
        '</select>' +
      '</label>';
  }

  function ensurePageHistoryDrawer() {
    var existing = document.querySelector('[data-testid="wolai-page-history-drawer"]');
    if (existing instanceof HTMLElement) return existing;
    var drawer = document.createElement('aside');
    drawer.className = 'wolai-page-history-drawer';
    drawer.setAttribute('data-testid', 'wolai-page-history-drawer');
    drawer.setAttribute('data-mnote-surface', 'page-history');
    drawer.hidden = true;
    drawer.innerHTML = '' +
      '<div class="wolai-page-history-panel">' +
        '<div class="wolai-page-history-header">' +
          '<div><div class="wolai-page-history-title">页面历史</div><div class="wolai-page-history-subtitle">当前会话内最近保存的 15 个快照。</div></div>' +
          '<button type="button" class="wolai-surface-close" data-page-history-action="close" aria-label="关闭页面历史">×</button>' +
        '</div>' +
        '<div class="wolai-page-history-list" data-page-history-list></div>' +
      '</div>';
    drawer.addEventListener('click', function(event) {
      if (event.target === drawer) closePageHistoryDrawer();
    });
    document.body.appendChild(drawer);
    return drawer;
  }

  function renderPageHistoryDrawer() {
    var drawer = ensurePageHistoryDrawer();
    var list = drawer.querySelector('[data-page-history-list]');
    if (!(list instanceof HTMLElement)) return;
    ensureHistorySnapshotsSeeded();
    list.innerHTML = pageUiState.historySnapshots.length
      ? pageUiState.historySnapshots.map(function(snapshot) {
          var stats = snapshot.stats || {};
          var label = new Date(snapshot.timestamp).toLocaleString('zh-CN', {
            year: 'numeric',
            month: '2-digit',
            day: '2-digit',
            hour: '2-digit',
            minute: '2-digit'
          });
          return '' +
            '<div class="wolai-page-history-item">' +
              '<div class="wolai-page-history-item-copy">' +
                '<div class="wolai-page-history-item-title">' + escapeHtml(label) + '</div>' +
                '<div class="wolai-page-history-item-meta">字数 ' + Number(stats.wordCount || 0) + ' · 字符 ' + Number(stats.characterCount || 0) + ' · 块数 ' + Number(stats.blockCount || 0) + '</div>' +
              '</div>' +
              '<button type="button" class="wolai-page-history-item-ghost" data-page-history-action="noop">仅查看</button>' +
            '</div>';
        }).join('')
      : '<div class="wolai-page-history-empty">尚未产生历史快照，编辑后会自动生成。</div>';
  }

  function openPageHistoryDrawer() {
    renderPageHistoryDrawer();
    var drawer = ensurePageHistoryDrawer();
    drawer.hidden = false;
    document.documentElement.setAttribute('data-mnote-page-history-open', 'true');
  }

  function closePageHistoryDrawer() {
    var drawer = document.querySelector('[data-testid="wolai-page-history-drawer"]');
    if (drawer instanceof HTMLElement) drawer.hidden = true;
    document.documentElement.removeAttribute('data-mnote-page-history-open');
  }

  function ensurePageShareDialog() {
    var existing = document.querySelector('[data-testid="wolai-page-share-dialog"]');
    if (existing instanceof HTMLElement) return existing;
    var dialog = document.createElement('div');
    dialog.className = 'wolai-page-share-dialog';
    dialog.setAttribute('data-testid', 'wolai-page-share-dialog');
    dialog.setAttribute('data-mnote-surface', 'page-share');
    dialog.hidden = true;
    dialog.innerHTML = '' +
      '<div class="wolai-page-share-card" role="dialog" aria-modal="true">' +
        '<div class="wolai-page-share-header">' +
          '<div><div class="wolai-page-share-title">公开分享页面</div><div class="wolai-page-share-subtitle">当前 3000 公开入口由 mnote-web 持有。</div></div>' +
          '<button type="button" class="wolai-surface-close" data-page-share-action="close" aria-label="关闭公开分享页面">×</button>' +
        '</div>' +
        '<div class="wolai-page-share-state">' +
          '<span class="wolai-public-pill wolai-public-pill--inline">全网公开</span>' +
          '<span class="wolai-page-share-copy">任何拥有链接的人都可以访问当前页面。</span>' +
        '</div>' +
        '<div class="wolai-page-share-url-row">' +
          '<input class="wolai-page-share-url" type="text" readonly data-page-share-url value="" />' +
          '<button type="button" class="wolai-page-share-copy-button" data-page-share-action="copy-link">复制链接</button>' +
        '</div>' +
        '<div class="wolai-page-share-footer">更多共享者、群组公开和权限策略仍待接线。</div>' +
      '</div>';
    dialog.addEventListener('click', function(event) {
      if (event.target === dialog) closePageShareDialog();
    });
    document.body.appendChild(dialog);
    return dialog;
  }

  function openPageShareDialog() {
    var dialog = ensurePageShareDialog();
    var input = dialog.querySelector('[data-page-share-url]');
    if (input instanceof HTMLInputElement) input.value = window.location.href;
    dialog.hidden = false;
    document.documentElement.setAttribute('data-mnote-page-share-open', 'true');
  }

  function closePageShareDialog() {
    var dialog = document.querySelector('[data-testid="wolai-page-share-dialog"]');
    if (dialog instanceof HTMLElement) dialog.hidden = true;
    document.documentElement.removeAttribute('data-mnote-page-share-open');
  }

  function pageAiSuggestions() {
    var title = searchText(document.querySelector('[data-page-title-current="true"]')?.textContent) || '当前页面';
    return [
      '帮我总结《' + title + '》当前内容',
      '把当前页面改写得更简洁一些',
      '提炼当前页的关键待办和行动项',
      '基于当前页内容生成一个三段式摘要'
    ];
  }

  function pageAiStorageKey() {
    return 'doc_ai_sessions:' + currentDocumentId();
  }

  function pageAiNewSession(title) {
    var now = Date.now();
    return {
      id: 'sess_' + now + '_' + Math.random().toString(16).slice(2, 8),
      title: title || '新会话',
      createdAt: now,
      updatedAt: now,
      messages: []
    };
  }

  function pageAiNormalizeSessions(sessions) {
    return (Array.isArray(sessions) ? sessions : [])
      .slice(0, 20)
      .map(function(session) {
        return {
          id: String(session && session.id || '').trim() || pageAiNewSession().id,
          title: String(session && session.title || '').trim() || '新会话',
          createdAt: Number(session && session.createdAt || Date.now()),
          updatedAt: Number(session && session.updatedAt || Date.now()),
          messages: Array.isArray(session && session.messages) ? session.messages.slice(-40) : []
        };
      })
      .sort(function(a, b) {
        return Number(b.updatedAt || 0) - Number(a.updatedAt || 0);
      });
  }

  function pageAiLoadSessions() {
    try {
      var raw = window.localStorage.getItem(pageAiStorageKey());
      if (!raw) {
        var fresh = pageAiNewSession();
        pageUiState.pageAiSessions = [fresh];
        pageUiState.pageAiActiveSessionId = fresh.id;
        pageUiState.pageAiMessages = [];
        return;
      }
      var parsed = JSON.parse(raw);
      var sessions = pageAiNormalizeSessions(parsed && parsed.sessions ? parsed.sessions : []);
      if (!sessions.length) {
        var fallback = pageAiNewSession();
        pageUiState.pageAiSessions = [fallback];
        pageUiState.pageAiActiveSessionId = fallback.id;
        pageUiState.pageAiMessages = [];
        return;
      }
      pageUiState.pageAiSessions = sessions;
      var activeId = String(parsed && parsed.activeSessionId || '').trim();
      var active = sessions.find(function(session) { return session.id === activeId; }) || sessions[0];
      pageUiState.pageAiActiveSessionId = active.id;
      pageUiState.pageAiMessages = Array.isArray(active.messages) ? active.messages.slice() : [];
    } catch (_) {
      var reset = pageAiNewSession();
      pageUiState.pageAiSessions = [reset];
      pageUiState.pageAiActiveSessionId = reset.id;
      pageUiState.pageAiMessages = [];
    }
  }

  function pageAiPersistSessions() {
    try {
      window.localStorage.setItem(pageAiStorageKey(), JSON.stringify({
        activeSessionId: pageUiState.pageAiActiveSessionId,
        sessions: pageAiNormalizeSessions(pageUiState.pageAiSessions)
      }));
    } catch (_) {}
  }

  function pageAiCurrentSession() {
    return pageUiState.pageAiSessions.find(function(session) {
      return session.id === pageUiState.pageAiActiveSessionId;
    }) || null;
  }

  function pageAiSetActiveSession(sessionId) {
    var session = pageUiState.pageAiSessions.find(function(item) { return item.id === sessionId; });
    if (!session) return;
    pageUiState.pageAiActiveSessionId = session.id;
    pageUiState.pageAiMessages = Array.isArray(session.messages) ? session.messages.slice() : [];
    pageUiState.pageAiPage = 'chat';
    pageAiPersistSessions();
    renderPageAiConversation();
  }

  function pageAiStartNewSession() {
    var session = pageAiNewSession();
    pageUiState.pageAiSessions = pageAiNormalizeSessions([session].concat(pageUiState.pageAiSessions));
    pageUiState.pageAiActiveSessionId = session.id;
    pageUiState.pageAiMessages = [];
    pageUiState.pageAiPage = 'chat';
    pageAiPersistSessions();
    renderPageAiConversation();
  }

  function pageAiProviderLabel(provider) {
    if (provider === 'codex') return 'Codex';
    if (provider === 'claudecode') return 'ClaudeCode';
    return 'Hermes';
  }

  function renderPageAiProviderButtons() {
    var drawer = ensurePageAiDrawer();
    drawer.querySelectorAll('[data-page-ai-provider]').forEach(function(button) {
      var provider = button.getAttribute('data-page-ai-provider') || 'hermes';
      var active = provider === pageUiState.pageAiProvider;
      button.classList.toggle('is-active', active);
      button.setAttribute('aria-pressed', active ? 'true' : 'false');
    });
    var subtitle = drawer.querySelector('.wolai-page-ai-subtitle');
    if (subtitle instanceof HTMLElement) {
      subtitle.textContent = '当前页面上下文优先 · ' + pageAiProviderLabel(pageUiState.pageAiProvider);
    }
  }

  function humanizePageAiResponse(rawText, promptText) {
    var providerLabel = pageAiProviderLabel(pageUiState.pageAiProvider);
    var text = String(rawText || '').trim();
    if (!text) {
      return providerLabel + ' 已收到你的问题“' + searchText(promptText) + '”，但这次没有返回可读内容。';
    }
    if (text.startsWith('{')) {
      try {
        var payload = JSON.parse(text);
        var operation = payload && payload.operation ? payload.operation : {};
        var normalized = operation && operation.normalized_input ? operation.normalized_input : {};
        var args = normalized && normalized.args ? normalized.args : {};
        var documentId = searchText(args.documentId || args.pageId || currentDocumentId());
        var toolName = searchText(operation.tool_name || normalized.toolName || 'doc_get');
        return providerLabel + ' 已收到你的问题“' + searchText(promptText) + '”。当前已通过 mnote-cli 建立页面级工具调用，目标页面是 ' + (documentId || '当前页面') + '，本次选择的工具是 ' + toolName + '。如果你继续追问，我会沿当前页面上下文继续回复。';
      } catch (_) {
        return providerLabel + ' 已返回结果，但当前结果是结构化文本，已为你保留原始内容。';
      }
    }
    return text;
  }

  function ensurePageAiDrawer() {
    var existing = document.querySelector('[data-testid="wolai-page-ai-drawer"]');
    if (existing instanceof HTMLElement) return existing;
    var drawer = document.createElement('aside');
    drawer.className = 'wolai-page-ai-drawer';
    drawer.setAttribute('data-testid', 'wolai-page-ai-drawer');
    drawer.setAttribute('data-mnote-surface', 'page-ai');
    drawer.hidden = true;
    drawer.innerHTML = '' +
      '<div class="wolai-page-ai-panel" role="dialog" aria-modal="false">' +
        '<div class="wolai-page-ai-header">' +
          '<div class="wolai-page-ai-header-copy">' +
            '<h2 class="wolai-page-ai-title" data-title="page-ai-title">智能问答</h2>' +
            '<div class="wolai-page-ai-subtitle">当前页面上下文优先 · Hermes</div>' +
          '</div>' +
          '<button type="button" class="wolai-surface-close" data-page-ai-action="close" aria-label="关闭页面 AI">×</button>' +
        '</div>' +
        '<div class="wolai-page-ai-body">' +
          '<div class="wolai-page-ai-suggestions">' +
            '<div class="wolai-page-ai-suggestions-header">' +
              '<span>推荐问题</span>' +
              '<button type="button" class="wolai-page-ai-ghost" data-page-ai-action="rotate">换一换</button>' +
            '</div>' +
            '<div class="wolai-page-ai-suggestion-list" data-page-ai-suggestion-list></div>' +
          '</div>' +
          '<div class="wolai-page-ai-conversation" data-page-ai-conversation></div>' +
        '</div>' +
        '<div class="wolai-page-ai-footer">' +
          '<div class="wolai-page-ai-toolbar">' +
            '<button type="button" class="wolai-page-ai-tab is-active" data-page-ai-action="new-session" aria-label="当前已是新会话">新会话</button>' +
            '<button type="button" class="wolai-page-ai-tab" data-page-ai-action="history">历史会话</button>' +
            '<div class="wolai-page-ai-provider-group">' +
              '<button type="button" class="wolai-page-ai-model-chip is-active" data-page-ai-provider="hermes" aria-pressed="true">Hermes</button>' +
              '<button type="button" class="wolai-page-ai-model-chip" data-page-ai-provider="codex" aria-pressed="false">Codex</button>' +
              '<button type="button" class="wolai-page-ai-model-chip" data-page-ai-provider="claudecode" aria-pressed="false">ClaudeCode</button>' +
            '</div>' +
          '</div>' +
          '<div class="wolai-page-ai-input-row">' +
            '<textarea class="wolai-page-ai-input" data-page-ai-input rows="3" placeholder="问我你想知道的"></textarea>' +
            '<button type="button" class="wolai-page-ai-send" data-page-ai-action="send" aria-label="发送">↑</button>' +
          '</div>' +
        '</div>' +
      '</div>';
    document.body.appendChild(drawer);
    return drawer;
  }

  function renderPageAiSuggestions() {
    var drawer = ensurePageAiDrawer();
    var list = drawer.querySelector('[data-page-ai-suggestion-list]');
    if (!(list instanceof HTMLElement)) return;
    var suggestions = pageAiSuggestions();
    var offset = pageUiState.pageAiSuggestionIndex % suggestions.length;
    var ordered = suggestions.slice(offset).concat(suggestions.slice(0, offset)).slice(0, 3);
    list.innerHTML = ordered.map(function(text) {
      return '<button type="button" class="wolai-page-ai-suggestion" data-page-ai-suggestion="' + escapeHtml(text) + '">' + escapeHtml(text) + '</button>';
    }).join('');
  }

  function renderPageAiConversation() {
    var drawer = ensurePageAiDrawer();
    var conversation = drawer.querySelector('[data-page-ai-conversation]');
    if (!(conversation instanceof HTMLElement)) return;
    if (pageUiState.pageAiPage === 'history') {
      if (!pageUiState.pageAiSessions.length) {
        conversation.innerHTML = '<div class="wolai-page-ai-empty">尚未产生历史会话。</div>';
        return;
      }
      conversation.innerHTML = pageUiState.pageAiSessions.map(function(session) {
        var preview = Array.isArray(session.messages) && session.messages.length
          ? session.messages.slice(-1)[0].content
          : '暂无消息';
        var active = session.id === pageUiState.pageAiActiveSessionId;
        return '' +
          '<button type="button" class="wolai-page-ai-message wolai-page-ai-message--history' + (active ? ' is-active' : '') + '" data-page-ai-session="' + escapeHtml(session.id) + '">' +
            '<div class="wolai-page-ai-message-role">会话</div>' +
            '<div class="wolai-page-ai-message-text"><strong>' + escapeHtml(session.title || '新会话') + '</strong><br />' + escapeHtml(preview) + '</div>' +
          '</button>';
      }).join('');
      return;
    }
    if (!pageUiState.pageAiMessages.length) {
      conversation.innerHTML = '<div class="wolai-page-ai-empty">围绕当前页面提问，我会优先使用当前页内容、页面结构和已保存设置。</div>';
      return;
    }
    conversation.innerHTML = pageUiState.pageAiMessages.map(function(item) {
      return '' +
        '<div class="wolai-page-ai-message wolai-page-ai-message--' + escapeHtml(item.role || 'assistant') + '">' +
          '<div class="wolai-page-ai-message-role">' + escapeHtml(item.role === 'user' ? '你' : 'AI') + '</div>' +
          '<div class="wolai-page-ai-message-text">' + escapeHtml(item.content || '') + '</div>' +
        '</div>';
    }).join('');
    conversation.scrollTop = conversation.scrollHeight;
  }

  function openPageAiDrawer() {
    pageAiLoadSessions();
    renderPageAiSuggestions();
    renderPageAiConversation();
    renderPageAiProviderButtons();
    var drawer = ensurePageAiDrawer();
    drawer.hidden = false;
    pageUiState.pageAiOpen = true;
    updatePageAiTriggerState();
  }

  function closePageAiDrawer() {
    var drawer = document.querySelector('[data-testid="wolai-page-ai-drawer"]');
    if (drawer instanceof HTMLElement) drawer.hidden = true;
    pageUiState.pageAiOpen = false;
    updatePageAiTriggerState();
  }

  function isPageAiDrawerOpen() {
    var drawer = document.querySelector('[data-testid="wolai-page-ai-drawer"]');
    return drawer instanceof HTMLElement && !drawer.hidden;
  }

  async function streamPageAiResponse(response, onEvent) {
    if (!response.body || typeof response.body.getReader !== 'function') return;
    var reader = response.body.getReader();
    var decoder = new TextDecoder();
    var buffer = '';
    while (true) {
      var chunk = await reader.read();
      if (chunk.done) break;
      buffer += decoder.decode(chunk.value, { stream: true });
      var frames = buffer.split('\n\n');
      buffer = frames.pop() || '';
      frames.forEach(function(frame) {
        var eventName = '';
        var dataLines = [];
        frame.split('\n').forEach(function(line) {
          if (line.startsWith('event:')) eventName = line.slice(6).trim();
          if (line.startsWith('data:')) dataLines.push(line.slice(5).trim());
        });
        if (eventName) onEvent(eventName, dataLines.join('\n'));
      });
    }
  }

  async function sendPageAiMessage(text) {
    if (pageUiState.pageAiBusy) return;
    var prompt = searchText(text);
    if (!prompt) return;
    pageAiLoadSessions();
    var aggregate = currentPageAggregate();
    var body = aggregate.body || {};
    var subtree = aggregate.tree && aggregate.tree.pageSubtree ? aggregate.tree.pageSubtree : null;
    var outline = subtree && subtree.outline ? subtree.outline : null;
    pageUiState.pageAiBusy = true;
    pageUiState.pageAiMessages.push({ role: 'user', content: prompt });
    var currentSession = pageAiCurrentSession();
    if (currentSession) {
      if (currentSession.title === '新会话') {
        currentSession.title = prompt.length > 18 ? prompt.slice(0, 18) + '…' : prompt;
      }
      currentSession.messages = pageUiState.pageAiMessages.slice();
      currentSession.updatedAt = Date.now();
    }
    pageAiPersistSessions();
    renderPageAiConversation();
    try {
      var response = await fetch('/api/ai-agent/run', {
        method: 'POST',
        headers: { 'content-type': 'application/json' },
        body: JSON.stringify({
          stream: true,
          maxSteps: 8,
          scope: 'document',
          messages: [{ role: 'user', content: prompt }],
          toolChoice: {
            mode: 'auto',
            toolSets: ['toolset.readonly', 'toolset.rag_read', 'toolset.docs_read', 'toolset.media_read', 'toolset.doc_read', 'toolset.doc_write', 'toolset.slash_write']
          },
          context: {
            documentId: currentDocumentId(),
            documentBlocks: body.content || null,
            node: {
              documentId: currentDocumentId(),
              title: aggregate.head && aggregate.head.title ? aggregate.head.title : ''
            },
            subtree: subtree,
            outline: outline,
            evidence: null,
            pageOptions: currentPageOptions()
          },
          options: {
            searxng: true,
            ai: { provider: pageUiState.pageAiProvider }
          }
        })
      });
      if (!response.ok) {
        throw new Error('page_ai_failed_' + response.status);
      }
      var assistantText = '';
      await streamPageAiResponse(response, function(eventName, payloadText) {
        if (eventName === 'assistant_message') {
          try {
            var payload = JSON.parse(payloadText || 'null');
            assistantText = searchText(payload && payload.text);
          } catch (_) {}
        }
      });
      pageUiState.pageAiMessages.push({
        role: 'assistant',
        content: humanizePageAiResponse(assistantText, prompt)
      });
      currentSession = pageAiCurrentSession();
      if (currentSession) {
        currentSession.messages = pageUiState.pageAiMessages.slice();
        currentSession.updatedAt = Date.now();
      }
      pageAiPersistSessions();
    } catch (error) {
      pageUiState.pageAiMessages.push({
        role: 'assistant',
        content: pageAiProviderLabel(pageUiState.pageAiProvider) + ' 当前请求失败：' + (error instanceof Error ? error.message : String(error))
      });
      currentSession = pageAiCurrentSession();
      if (currentSession) {
        currentSession.messages = pageUiState.pageAiMessages.slice();
        currentSession.updatedAt = Date.now();
      }
      pageAiPersistSessions();
    } finally {
      pageUiState.pageAiBusy = false;
      renderPageAiConversation();
    }
  }

  function ensurePageSettingsPopover() {
    var existing = document.querySelector('[data-testid="wolai-page-settings-popover"]');
    if (existing instanceof HTMLElement) return existing;
    var popover = document.createElement('div');
    popover.className = 'wolai-page-settings-popover';
    popover.setAttribute('data-testid', 'wolai-page-settings-popover');
    popover.setAttribute('data-mnote-surface', 'page-settings');
    popover.hidden = true;
    popover.innerHTML = '' +
      '<div class="wolai-page-settings-panel" role="dialog" aria-modal="false">' +
        '<div class="wolai-page-settings-tabs" data-testid="wolai-page-settings-tabs" role="tablist" aria-label="页面设置分组">' +
          '<button type="button" class="wolai-page-settings-tab is-active" role="tab" aria-selected="true" data-page-settings-tab="page">页面选项</button>' +
          '<button type="button" class="wolai-page-settings-tab" role="tab" aria-selected="false" data-page-settings-tab="custom">自定义页面</button>' +
          '<button type="button" class="wolai-page-settings-tab" role="tab" aria-selected="false" data-page-settings-tab="global">全局选项</button>' +
        '</div>' +
        '<div class="wolai-page-settings-section" data-page-settings-panel="page">' +
          createPageOptionRow('wideLayout', 'checkbox') +
          createPageOptionRow('smallText', 'checkbox') +
          createPageOptionRow('showToc', 'checkbox') +
          createPageOptionRow('protectEditing', 'checkbox') +
        '</div>' +
        '<div class="wolai-page-settings-section" data-page-settings-panel="custom" hidden>' +
          createPageFontRow() +
          createPageOptionRow('layoutDensity', 'select') +
          createPageOptionRow('collapseBacklinks', 'checkbox') +
          createPageOptionRow('hideChildPages', 'checkbox') +
          createPageOptionRow('showBlockRefCount', 'checkbox') +
        '</div>' +
        '<div class="wolai-page-settings-section" data-page-settings-panel="global" hidden>' +
          createGlobalHeadingNumbersRow() +
        '</div>' +
        '<div class="wolai-page-settings-actions">' +
          '<button type="button" class="wolai-page-settings-action" data-page-settings-action="history">页面历史...</button>' +
          '<button type="button" class="wolai-page-settings-action" data-page-settings-action="share">公开分享页面...</button>' +
          '<button type="button" class="wolai-page-settings-action is-disabled" data-page-settings-action="move" disabled>移动到...</button>' +
          '<button type="button" class="wolai-page-settings-action is-disabled" data-page-settings-action="embed" disabled>嵌入到...</button>' +
          '<button type="button" class="wolai-page-settings-action is-danger is-disabled" data-page-settings-action="delete" disabled>删除页面</button>' +
        '</div>' +
        '<div class="wolai-page-settings-stats" data-testid="wolai-page-settings-stats"></div>' +
      '</div>';
    document.body.appendChild(popover);
    return popover;
  }

  function renderPageSettingsPopover() {
    var popover = ensurePageSettingsPopover();
    var options = currentPageOptions();
    popover.querySelectorAll('[data-page-option-checkbox]').forEach(function(input) {
      var key = input.getAttribute('data-page-option-checkbox');
      input.checked = Boolean(options[key]);
      input.disabled = !pageOptionIsSupported(key);
    });
    popover.querySelectorAll('[data-page-option-select]').forEach(function(select) {
      var key = select.getAttribute('data-page-option-select');
      var value = key === 'layoutDensity' ? String(options.layoutDensity || 'normal') : String(options.pageFont || 'default');
      select.value = value;
    });
    renderGlobalOptions(popover);
    var statsNode = popover.querySelector('[data-testid="wolai-page-settings-stats"]');
    if (statsNode instanceof HTMLElement) {
      var stats = computeLivePageStats();
      statsNode.innerHTML = '' +
        '<span>字数 ' + Number(stats.wordCount || 0) + '</span>' +
        '<span>字符 ' + Number(stats.characterCount || 0) + '</span>' +
        '<span>块数 ' + Number(stats.blockCount || 0) + '</span>' +
        '<span>待办 ' + Number(stats.todoDone || 0) + '/' + Number(stats.todoTotal || 0) + '</span>';
    }
  }

  function setActivePageSettingsTab(tabName) {
    var popover = ensurePageSettingsPopover();
    popover.querySelectorAll('[data-page-settings-tab]').forEach(function(tab) {
      var active = tab.getAttribute('data-page-settings-tab') === tabName;
      tab.classList.toggle('is-active', active);
      tab.setAttribute('aria-selected', active ? 'true' : 'false');
    });
    popover.querySelectorAll('[data-page-settings-panel]').forEach(function(panel) {
      panel.hidden = panel.getAttribute('data-page-settings-panel') !== tabName;
    });
  }

  async function persistPageOptionsPatch(patch) {
    var previous = Object.assign({}, currentPageOptions());
    pageUiState.pageOptions = Object.assign({}, previous, patch);
    var nextOptions = Object.assign({}, pageUiState.pageOptions);
    applyPageOptionsToShell();
    renderPageSettingsPopover();
    try {
      var response = await fetch('/api/documents/options', {
        method: 'POST',
        headers: { 'content-type': 'application/json' },
        body: JSON.stringify({
          documentId: currentDocumentId(),
          workspaceId: resolveWorkspaceId(document.body),
          ...currentWorkspaceSourcePayload(),
          options: nextOptions,
          commandName: 'page.layout.updateOptions'
        })
      });
      var payload = await response.json().catch(function(){ return null; });
      if (!response.ok || !payload || payload.ok !== true) {
        throw new Error(payload && payload.error && payload.error.message ? payload.error.message : 'page_settings_save_failed_' + response.status);
      }
      document.documentElement.setAttribute('data-mnote-page-options-saved', 'true');
    } catch (error) {
      pageUiState.pageOptions = previous;
      applyPageOptionsToShell();
      renderPageSettingsPopover();
      document.documentElement.setAttribute('data-mnote-page-options-error', error instanceof Error ? error.message : String(error));
    }
  }

  function isPageSettingsOpen() {
    var popover = document.querySelector('[data-testid="wolai-page-settings-popover"]');
    return popover instanceof HTMLElement && !popover.hidden;
  }

  function openPageSettingsPopover() {
    if (!currentDocumentId()) return;
    var popover = ensurePageSettingsPopover();
    renderPageSettingsPopover();
    setActivePageSettingsTab('page');
    popover.hidden = false;
    pageUiState.pageSettingsOpen = true;
    updatePageSettingsTriggerState();
  }

  function closePageSettingsPopover() {
    var popover = document.querySelector('[data-testid="wolai-page-settings-popover"]');
    if (popover instanceof HTMLElement) popover.hidden = true;
    pageUiState.pageSettingsOpen = false;
    updatePageSettingsTriggerState();
  }

  function togglePageSettingsPopover() {
    if (isPageSettingsOpen()) closePageSettingsPopover();
    else openPageSettingsPopover();
  }

  document.addEventListener('click', function(e) {
    if (activeTreeContextMenu && activeTreeContextMenu.contains(e.target)) return;
    if (activeTreeContextMenu) closeTreeContextMenu();

    var historyClose = closestAction(e.target, '[data-page-history-action="close"]');
    if (historyClose) {
      e.preventDefault();
      closePageHistoryDrawer();
      return;
    }

    var shareClose = closestAction(e.target, '[data-page-share-action="close"]');
    if (shareClose) {
      e.preventDefault();
      closePageShareDialog();
      return;
    }

    var shareCopy = closestAction(e.target, '[data-page-share-action="copy-link"]');
    if (shareCopy) {
      e.preventDefault();
      void copyTreeContextValue(window.location.href, 'page-share-link');
      return;
    }

    var pageHistoryTrigger = closestAction(e.target, '[data-mnote-action="open-page-history"]');
    if (pageHistoryTrigger) {
      e.preventDefault();
      openPageHistoryDrawer();
      return;
    }

    var pageSettingsTrigger = closestAction(e.target, '[data-mnote-action="open-page-settings"]');
    if (pageSettingsTrigger) {
      e.preventDefault();
      togglePageSettingsPopover();
      return;
    }

    var pageSettingsPanel = closestAction(e.target, '.wolai-page-settings-panel');
    if (isPageSettingsOpen() && !pageSettingsPanel) {
      closePageSettingsPopover();
    }

    var pageSettingsTab = closestAction(e.target, '[data-page-settings-tab]');
    if (pageSettingsTab) {
      e.preventDefault();
      setActivePageSettingsTab(pageSettingsTab.getAttribute('data-page-settings-tab') || 'page');
      return;
    }

    var pageSettingsAction = closestAction(e.target, '[data-page-settings-action]');
    if (pageSettingsAction) {
      e.preventDefault();
      var actionName = pageSettingsAction.getAttribute('data-page-settings-action') || '';
      if (actionName === 'history') {
        openPageHistoryDrawer();
        return;
      }
      if (actionName === 'share') {
        openPageShareDialog();
        return;
      }
      return;
    }

    var pageAiTrigger = closestAction(e.target, '[data-mnote-action="open-page-ai"]');
    if (pageAiTrigger) {
      e.preventDefault();
      openPageAiDrawer();
      return;
    }

    var pageAiClose = closestAction(e.target, '[data-page-ai-action="close"]');
    if (pageAiClose) {
      e.preventDefault();
      closePageAiDrawer();
      return;
    }

    var pageAiRotate = closestAction(e.target, '[data-page-ai-action="rotate"]');
    if (pageAiRotate) {
      e.preventDefault();
      pageUiState.pageAiSuggestionIndex += 1;
      renderPageAiSuggestions();
      return;
    }

    var pageAiProvider = closestAction(e.target, '[data-page-ai-provider]');
    if (pageAiProvider) {
      e.preventDefault();
      pageUiState.pageAiProvider = pageAiProvider.getAttribute('data-page-ai-provider') || 'hermes';
      renderPageAiProviderButtons();
      return;
    }

    var pageAiSession = closestAction(e.target, '[data-page-ai-session]');
    if (pageAiSession) {
      e.preventDefault();
      pageAiSetActiveSession(pageAiSession.getAttribute('data-page-ai-session') || '');
      return;
    }

    var pageAiSuggestion = closestAction(e.target, '[data-page-ai-suggestion]');
    if (pageAiSuggestion) {
      e.preventDefault();
      var text = pageAiSuggestion.getAttribute('data-page-ai-suggestion') || '';
      var inputNode = ensurePageAiDrawer().querySelector('[data-page-ai-input]');
      if (inputNode instanceof HTMLTextAreaElement) {
        inputNode.value = text;
        inputNode.focus();
      }
      return;
    }

    var pageAiNewSession = closestAction(e.target, '[data-page-ai-action="new-session"]');
    if (pageAiNewSession) {
      e.preventDefault();
      pageUiState.pageAiPage = 'chat';
      pageAiStartNewSession();
      return;
    }

    var pageAiHistory = closestAction(e.target, '[data-page-ai-action="history"]');
    if (pageAiHistory) {
      e.preventDefault();
      pageAiLoadSessions();
      pageUiState.pageAiPage = pageUiState.pageAiPage === 'history' ? 'chat' : 'history';
      renderPageAiConversation();
      return;
    }

    var pageAiSend = closestAction(e.target, '[data-page-ai-action="send"]');
    if (pageAiSend) {
      e.preventDefault();
      var input = ensurePageAiDrawer().querySelector('[data-page-ai-input]');
      if (input instanceof HTMLTextAreaElement) {
        var message = input.value;
        input.value = '';
        void sendPageAiMessage(message);
      }
      return;
    }

    var searchTrigger = closestAction(e.target, '[data-mnote-action="open-search-modal"]');
    if (searchTrigger) {
      e.preventDefault();
      toggleSearchModal();
      return;
    }
    var searchDialog = closestAction(e.target, '.wolai-search-dialog');
    if (isSearchModalOpen() && !searchDialog) {
      closeSearchModal();
      return;
    }

    var sourceMenuTrigger = closestAction(e.target, '[data-mnote-action="open-workspace-source-menu"]');
    if (sourceMenuTrigger) {
      e.preventDefault();
      var existingSourceMenu = document.querySelector('[data-testid="mnote-workspace-source-menu"]');
      if (existingSourceMenu) closeWorkspaceSourceMenu();
      else openWorkspaceSourceMenu(sourceMenuTrigger);
      return;
    }
    var sourceMenu = closestAction(e.target, '[data-testid="mnote-workspace-source-menu"]');
    if (!sourceMenu) closeWorkspaceSourceMenu();

    var tabTrigger = closestAction(e.target, '[data-mnote-sidebar-tree-tab]');
    if (tabTrigger) {
      e.preventDefault();
      switchSidebarTreeTab(tabTrigger);
      return;
    }

    var localFolderTrigger = closestAction(e.target, '[data-mnote-action="open-local-folder"]');
    if (localFolderTrigger) {
      e.preventDefault();
      requestOpenLocalFolder();
      return;
    }

    var createTrigger = closestAction(e.target, '[data-mnote-action="create-page"]');
    if (createTrigger) {
      e.preventDefault();
      void createPage(createTrigger, null);
      return;
    }

    var fileTree = document.getElementById('sidebar-file-tree-root');
    if (fileTree && fileTree.contains(e.target)) {
      var fileBtn = closestAction(e.target, '[data-rust-action]');
      var fileRow = closestAction(e.target, '.tree-row[data-shell-mode="filetree"]');
      if (!fileRow) return;
      var fileAction = fileBtn ? fileBtn.getAttribute('data-rust-action') : 'open';
      var rowId = fileRow.getAttribute('data-row-id') || '';
      var rowKind = fileRow.getAttribute('data-row-kind') || '';
      var documentId = fileRow.getAttribute('data-document-id') || fileRow.getAttribute('data-doc-id') || '';
      var assetId = fileRow.getAttribute('data-asset-id') || '';
      if (fileAction === 'toggle') {
        e.preventDefault();
        toggleChildren(fileRow, fileBtn);
        return;
      }
      if (fileAction === 'create') {
        e.preventDefault();
        void createPage(fileBtn || fileRow, documentId || fileRow.getAttribute('data-node-id'));
        return;
      }
      if (fileAction === 'menu') {
        e.preventDefault();
        selectSidebarFileTreeRow(fileRow, { ctrlKey: false, metaKey: false, shiftKey: false });
        var point = rowCenter(fileBtn || fileRow);
        dispatchSidebarEvent('tree.filetree.context-menu', { rowId: rowId, rowKind: rowKind, documentId: documentId || null, assetId: assetId || null });
        openFileTreeContextMenu(fileRow, point.x, point.y, fileBtn || fileRow);
        return;
      }
      e.preventDefault();
      selectSidebarFileTreeRow(fileRow, { ctrlKey: e.ctrlKey, metaKey: e.metaKey, shiftKey: e.shiftKey });
      dispatchSidebarEvent('tree.filetree.open', { rowId: rowId, rowKind: rowKind, documentId: documentId || null, assetId: assetId || null });
      if (e.shiftKey || e.ctrlKey || e.metaKey) {
        return;
      }
      if ((rowKind === 'document' || rowKind === 'index' || rowKind === 'markdown') && documentId) {
        navigateToDocument(documentId, resolveWorkspaceId(fileRow), { treeView: 'filetree' });
      } else if (assetId) {
        dispatchSidebarEvent('tree.asset.open', { rowId: rowId, rowKind: rowKind, documentId: documentId || null, assetId: assetId });
      }
      return;
    }

    var tree = document.getElementById('sidebar-tree-root');
    if (!tree || !tree.contains(e.target)) return;
    var btn = closestAction(e.target, '[data-rust-action]');
    if (!btn) return;
    var nodeId = btn.getAttribute('data-node-id');
    var action = btn.getAttribute('data-rust-action');

    if (action === 'toggle') {
      var row = btn.closest('.tree-row');
      if (!row) return;
      toggleChildren(row, btn);
      e.preventDefault();
    } else if (action === 'open') {
      var workspaceId = resolveWorkspaceId(btn);
      navigateToDocument(nodeId, workspaceId, { treeView: 'page' });
      e.preventDefault();
    } else if (action === 'create') {
      e.preventDefault();
      void createPage(btn, nodeId);
    } else if (action === 'rename') {
      e.preventDefault();
      var title = window.prompt('重命名页面');
      if (title && title.trim()) {
        void dispatchTreeCommand(btn, {
          action: 'rename',
          workspaceId: resolveWorkspaceId(btn),
          documentId: nodeId,
          title: title.trim()
        }).then(function(){
          updateTitleEverywhere(nodeId, title.trim());
          scheduleProjectionRefresh(resolveWorkspaceId(btn));
        });
      }
    } else if (action === 'menu') {
      e.preventDefault();
      var menuPoint = rowCenter(btn);
      dispatchSidebarEvent('tree.page.context-menu', { documentId: nodeId, target: { documentId: nodeId } });
      openPageTreeContextMenu(btn.closest('.tree-row'), menuPoint.x, menuPoint.y, btn);
    }
  });

  document.addEventListener('contextmenu', function(event) {
    var fileRow = closestAction(event.target, '.tree-row[data-shell-mode="filetree"]');
    if (fileRow) {
      event.preventDefault();
      var contextRowId = fileRow.getAttribute('data-row-id') || '';
      if (contextRowId && !sidebarFileTreeSelection.selectedRowIds.has(contextRowId)) {
        selectSidebarFileTreeRow(fileRow, { ctrlKey: false, metaKey: false, shiftKey: false });
      }
      openFileTreeContextMenu(fileRow, event.clientX, event.clientY, fileRow);
      return;
    }
    var pageRow = closestAction(event.target, '.tree-row[data-shell-mode="page"]');
    if (pageRow) {
      event.preventDefault();
      openPageTreeContextMenu(pageRow, event.clientX, event.clientY, pageRow);
    }
  });

  document.addEventListener('keydown', function(event) {
    if (event.key === 'Escape' && isPageSettingsOpen()) {
      event.preventDefault();
      closePageSettingsPopover();
      return;
    }
    if ((event.metaKey || event.ctrlKey) && !event.shiftKey && event.key && event.key.toLowerCase() === 'p') {
      event.preventDefault();
      toggleSearchModal();
      return;
    }
    if (event.key === 'Escape') {
      closeSearchModal();
      closeTreeContextMenu();
    }
    if (event.key === 'Enter' && !event.shiftKey) {
      var aiInput = closestAction(event.target, '[data-page-ai-input]');
      if (aiInput instanceof HTMLTextAreaElement) {
        event.preventDefault();
        var text = aiInput.value;
        aiInput.value = '';
        void sendPageAiMessage(text);
      }
    }
  });

  document.addEventListener('change', function(event) {
    var globalCheckbox = closestAction(event.target, '[data-global-option-checkbox="showHeadingNumbers"]');
    if (globalCheckbox instanceof HTMLInputElement) {
      writeGlobalShowHeadingNumbers(globalCheckbox.checked);
      applyPageOptionsToShell();
      renderPageSettingsPopover();
      return;
    }
    var checkbox = closestAction(event.target, '[data-page-option-checkbox]');
    if (checkbox instanceof HTMLInputElement) {
      var key = checkbox.getAttribute('data-page-option-checkbox') || '';
      if (!pageOptionIsSupported(key)) return;
      var patch = {};
      patch[key] = checkbox.checked;
      void persistPageOptionsPatch(patch);
      return;
    }
    var select = closestAction(event.target, '[data-page-option-select]');
    if (select instanceof HTMLSelectElement) {
      var selectKey = select.getAttribute('data-page-option-select') || '';
      var next = {};
      if (selectKey === 'layoutDensity') next.layoutDensity = select.value;
      if (selectKey === 'pageFont') next.pageFont = select.value;
      if (Object.keys(next).length) {
        void persistPageOptionsPatch(next);
      }
    }
  });

  function initializePageUiSurfaces() {
    pageUiState.pageOptions = null;
    applyPageOptionsToShell();
    updatePageSettingsTriggerState();
    updatePageAiTriggerState();
    ensureHistorySnapshotsSeeded();
  }

  window.__mnoteRecordPageHistorySnapshot = recordPageHistorySnapshot;
  window.__mnoteApplyPageOptionsToShell = applyPageOptionsToShell;
  setTimeout(initializePageUiSurfaces, 0);

  function readPageDragNodeId(event) {
    var fromTransfer = event.dataTransfer ? event.dataTransfer.getData(PAGE_DRAG_MIME) || event.dataTransfer.getData('text/plain') : '';
    return (fromTransfer || draggingPageNodeId || '').trim();
  }

  function clearPageDropFeedback() {
    if (activePageDropRow instanceof HTMLElement) {
      activePageDropRow.setAttribute('data-drop-feedback', 'false');
    }
    activePageDropRow = null;
  }

  function canDropPage(sourceNodeId, targetRow) {
    if (!sourceNodeId || !(targetRow instanceof HTMLElement)) return false;
    var targetNodeId = targetRow.getAttribute('data-node-id') || '';
    if (!targetNodeId || targetNodeId === sourceNodeId) return false;
    var sourceNode = document.querySelector('#sidebar-tree-root .tree-node[data-node-id="' + cssEscape(sourceNodeId) + '"]');
    return !(sourceNode instanceof HTMLElement && sourceNode.contains(targetRow));
  }

  function pageDropPosition(event, row) {
    var rect = row.getBoundingClientRect();
    var ratio = rect.height > 0 ? (event.clientY - rect.top) / rect.height : 0.5;
    if (ratio < 0.25) return 'before';
    if (ratio > 0.75) return 'after';
    return 'inside';
  }

  function resolvePageMoveTarget(targetRow, position) {
    var targetNodeId = targetRow.getAttribute('data-node-id') || '';
    var parentId = targetRow.getAttribute('data-parent-id') || null;
    if (position === 'inside') {
      var children = targetRow.parentElement ? targetRow.parentElement.querySelectorAll(':scope > .tree-children > .tree-node > .tree-row[data-shell-mode="page"]') : [];
      return { parentId: targetNodeId, sortOrder: children.length };
    }
    var siblings = Array.from(document.querySelectorAll('#sidebar-tree-root .tree-row[data-shell-mode="page"]')).filter(function(row) {
      return (row.getAttribute('data-parent-id') || '') === (parentId || '');
    });
    var index = siblings.indexOf(targetRow);
    return { parentId: parentId, sortOrder: Math.max(0, index + (position === 'after' ? 1 : 0)) };
  }

  document.addEventListener('dragstart', function(event) {
    var pageRow = closestAction(event.target, '.tree-row[data-shell-mode="page"][draggable="true"]');
    if (pageRow) {
      draggingPageNodeId = pageRow.getAttribute('data-node-id') || '';
      if (event.dataTransfer) {
        event.dataTransfer.effectAllowed = 'move';
        event.dataTransfer.setData(PAGE_DRAG_MIME, draggingPageNodeId);
        event.dataTransfer.setData('text/plain', draggingPageNodeId);
      }
      return;
    }
    var fileRow = closestAction(event.target, '.tree-row[data-shell-mode="filetree"][draggable="true"]');
    if (fileRow) {
      draggingFileTreeRowIds = selectedSidebarFileTreeRowIdsForDrag(fileRow);
      if (event.dataTransfer) {
        var payload = JSON.stringify({ type: 'mnote-file-tree-dnd', version: 1, rowIds: draggingFileTreeRowIds });
        event.dataTransfer.effectAllowed = 'copyMove';
        event.dataTransfer.setData(FILETREE_DRAG_MIME, payload);
        event.dataTransfer.setData('application/x-mnote-file-tree', payload);
        event.dataTransfer.setData('text/plain', payload);
      }
    }
  });

  document.addEventListener('dragover', function(event) {
    var pageRow = closestAction(event.target, '.tree-row[data-shell-mode="page"]');
    var sourceNodeId = readPageDragNodeId(event);
    if (pageRow && canDropPage(sourceNodeId, pageRow)) {
      event.preventDefault();
      clearPageDropFeedback();
      pageRow.setAttribute('data-drop-feedback', 'true');
      pageRow.setAttribute('data-drop-position', pageDropPosition(event, pageRow));
      activePageDropRow = pageRow;
      if (event.dataTransfer) event.dataTransfer.dropEffect = 'move';
      return;
    }
    var fileTree = document.getElementById('sidebar-file-tree-root');
    if (fileTree && fileTree.contains(event.target)) {
      var hasFiles = event.dataTransfer && Array.prototype.indexOf.call(event.dataTransfer.types || [], 'Files') >= 0;
      var hasInternal = event.dataTransfer && Array.prototype.indexOf.call(event.dataTransfer.types || [], FILETREE_DRAG_MIME) >= 0;
      if (!hasFiles && !hasInternal && draggingFileTreeRowIds.length === 0) return;
      event.preventDefault();
      if (activeFileTreeDropRow instanceof HTMLElement) activeFileTreeDropRow.setAttribute('data-drop-target', 'false');
      activeFileTreeDropRow = closestAction(event.target, '.tree-row[data-shell-mode="filetree"]') || fileTree;
      if (activeFileTreeDropRow instanceof HTMLElement) activeFileTreeDropRow.setAttribute('data-drop-target', 'true');
      if (event.dataTransfer) event.dataTransfer.dropEffect = hasFiles || event.altKey ? 'copy' : 'move';
    }
  });

  document.addEventListener('drop', function(event) {
    var pageRow = closestAction(event.target, '.tree-row[data-shell-mode="page"]');
    var sourceNodeId = readPageDragNodeId(event);
    if (pageRow && canDropPage(sourceNodeId, pageRow)) {
      event.preventDefault();
      var position = pageDropPosition(event, pageRow);
      var target = resolvePageMoveTarget(pageRow, position);
      clearPageDropFeedback();
      draggingPageNodeId = '';
      void dispatchTreeCommand(pageRow, {
        action: 'move',
        workspaceId: resolveWorkspaceId(pageRow),
        documentId: sourceNodeId,
        parentId: target.parentId,
        sortOrder: target.sortOrder
      }).then(function(){ scheduleProjectionRefresh(resolveWorkspaceId(pageRow)); });
      return;
    }
    var fileTree = document.getElementById('sidebar-file-tree-root');
    if (fileTree && fileTree.contains(event.target)) {
      var targetRow = closestAction(event.target, '.tree-row[data-shell-mode="filetree"]');
      var files = event.dataTransfer ? Array.from(event.dataTransfer.files || []) : [];
      var raw = event.dataTransfer ? event.dataTransfer.getData(FILETREE_DRAG_MIME) || event.dataTransfer.getData('application/x-mnote-file-tree') || '' : '';
      var rowIds = draggingFileTreeRowIds.slice();
      if (raw) {
        try {
          var parsed = JSON.parse(raw);
          if (Array.isArray(parsed.rowIds)) rowIds = parsed.rowIds;
        } catch (_) {}
      }
      if (!files.length && !rowIds.length) return;
      event.preventDefault();
      var detail = {
        workspaceId: resolveWorkspaceId(targetRow || fileTree),
        targetRowId: targetRow ? targetRow.getAttribute('data-row-id') : null,
        targetRowKind: targetRow ? targetRow.getAttribute('data-row-kind') : 'root',
        documentId: targetRow ? targetRow.getAttribute('data-document-id') || targetRow.getAttribute('data-doc-id') : null,
        assetId: targetRow ? targetRow.getAttribute('data-asset-id') : null
      };
      if (activeFileTreeDropRow instanceof HTMLElement) activeFileTreeDropRow.setAttribute('data-drop-target', 'false');
      activeFileTreeDropRow = null;
      if (files.length) {
        dispatchSidebarEvent('tree.filetree.external-drop', Object.assign({}, detail, { files: files }));
      } else {
        dispatchSidebarEvent('tree.filetree.internal-drop', Object.assign({}, detail, { rowIds: rowIds, copy: event.altKey === true }));
      }
      draggingFileTreeRowIds = [];
    }
  });

  document.addEventListener('dragend', function() {
    draggingPageNodeId = '';
    draggingFileTreeRowIds = [];
    clearPageDropFeedback();
    if (activeFileTreeDropRow instanceof HTMLElement) activeFileTreeDropRow.setAttribute('data-drop-target', 'false');
    activeFileTreeDropRow = null;
  });

  window.addEventListener('tree:title-updated', function(event) {
    var detail = event.detail || {};
    updateTitleEverywhere(detail.documentId, detail.title);
    document.documentElement.setAttribute('data-mnote-title-local-applied', 'true');
  });

  window.addEventListener('tree:snapshot', function(event) {
    var payload = event.detail && event.detail.payload ? event.detail.payload : event.detail;
    if (renderPageProjection(payload)) {
      document.documentElement.setAttribute('data-mnote-tree-live-applied', 'snapshot');
    }
    scheduleProjectionRefresh(payload && payload.workspaceId);
  });

  window.addEventListener('tree:delta', function(event) {
    var payload = event.detail && event.detail.payload ? event.detail.payload : event.detail;
    var data = payload && (payload.data || payload.delta || payload);
    var documents = data && (data.upsertDocuments || data.upsert_documents);
    if (Array.isArray(documents)) {
      documents.forEach(function(doc) {
        updateTitleEverywhere(doc.id || doc.documentId, doc.title || '无标题');
      });
    }
    document.documentElement.setAttribute('data-mnote-tree-live-applied', 'delta');
    scheduleProjectionRefresh(payload && payload.workspaceId);
  });

  window.addEventListener('tree:resync', function(event) {
    var payload = event.detail && event.detail.payload ? event.detail.payload : event.detail;
    document.documentElement.setAttribute('data-mnote-tree-live-applied', 'resync');
    scheduleProjectionRefresh(payload && payload.workspaceId);
  });

  var tree = document.getElementById('sidebar-tree-root');
  var activeId = currentDocumentId();
  if (tree && activeId) {
    var activeRow = tree.querySelector('.tree-row[data-node-id="' + cssEscape(activeId) + '"]');
    if (activeRow instanceof HTMLElement) activeRow.setAttribute('data-active', 'true');
  }
  var initiallySelectedFileRows = document.querySelectorAll('#sidebar-file-tree-root .tree-row[data-selected="true"]');
  initiallySelectedFileRows.forEach(function(row) {
    if (!(row instanceof HTMLElement)) return;
    var rowId = row.getAttribute('data-row-id') || '';
    if (!rowId) return;
    sidebarFileTreeSelection.selectedRowIds.add(rowId);
    if (!sidebarFileTreeSelection.anchorRowId) sidebarFileTreeSelection.anchorRowId = rowId;
    sidebarFileTreeSelection.focusedRowId = rowId;
  });
  syncSidebarFileTreeSelection();
  restoreSidebarTreeTab();
})();
"##;

const TREE_LIVE_CONTROLLER_JS: &str = r##"
(function(){
  if (window.__mnoteTreeLiveControllerStarted) return;
  window.__mnoteTreeLiveControllerStarted = true;

  function readBootstrap() {
    var script = document.getElementById('__MNOTE_TREE_LIVE_BOOTSTRAP__');
    var fallback = {
      schema: 'mnote.tree_live_bootstrap.v1',
      transport: 'convex-command-log-sse',
      endpoint: '/api/tree/events',
      resyncEndpoint: '/api/tree/projections/sidebar',
      rootIds: [],
      initialRevision: null
    };
    if (!script || !script.textContent) return fallback;
    try {
      return Object.assign(fallback, JSON.parse(script.textContent));
    } catch (_) {
      return fallback;
    }
  }

  function resolveWorkspaceId() {
    var withWorkspace = document.querySelector('[data-workspace-id]');
    if (withWorkspace) {
      var value = (withWorkspace.getAttribute('data-workspace-id') || '').trim();
      if (value) return value;
    }
    var params = new URLSearchParams(window.location.search);
    return (params.get('workspaceId') || 'default').trim() || 'default';
  }

  function dispatchTreeEvent(name, detail) {
    window.dispatchEvent(new CustomEvent(name, { detail: detail }));
  }

  function applyStatus(status) {
    document.documentElement.setAttribute('data-mnote-tree-live-status', status);
  }

  function applyTransport(transport) {
    document.documentElement.setAttribute('data-mnote-tree-live-transport', transport || 'convex-command-log-sse');
  }

  function closeActiveSource() {
    var source = window.__mnoteTreeLiveEventSource;
    if (source && typeof source.close === 'function') {
      source.close();
      window.__mnoteTreeLiveEventSource = null;
      applyStatus('closed');
    }
  }

  function start() {
    if (!('EventSource' in window)) {
      applyStatus('unsupported');
      return;
    }
    var bootstrap = readBootstrap();
    var params = new URLSearchParams(window.location.search);
    var sourceKind = (params.get('sourceKind') || '').trim();
    if (sourceKind === 'local_folder') {
      applyTransport('local-folder-static');
      applyStatus('static');
      return;
    }
    applyTransport(bootstrap.transport || 'convex-command-log-sse');
    var workspaceId = bootstrap.workspaceId || resolveWorkspaceId();
    var url = new URL(bootstrap.endpoint || '/api/tree/events', window.location.origin);
    url.searchParams.set('workspaceId', workspaceId);
    if (Array.isArray(bootstrap.rootIds) && bootstrap.rootIds.length === 1) {
      url.searchParams.set('rootNodeId', bootstrap.rootIds[0]);
    }
    var failures = 0;
    var source = new EventSource(url.toString());
    window.__mnoteTreeLiveEventSource = source;
    applyStatus('connecting');

    source.addEventListener('open', function(){
      failures = 0;
      applyStatus('connected');
    });

    source.addEventListener('snapshot', function(event){
      var payload = JSON.parse(event.data || '{}');
      var revision = payload.revision || payload.cursor || event.lastEventId || null;
      document.documentElement.setAttribute('data-mnote-tree-live-revision', String(revision || ''));
      dispatchTreeEvent('tree:snapshot', { payload: payload, revision: revision, bootstrap: bootstrap });
    });

    source.addEventListener('delta', function(event){
      var payload = JSON.parse(event.data || '{}');
      var revision = payload.revision || payload.cursor || event.lastEventId || null;
      document.documentElement.setAttribute('data-mnote-tree-live-revision', String(revision || ''));
      dispatchTreeEvent('tree:delta', { payload: payload, revision: revision, bootstrap: bootstrap });
    });

    source.addEventListener('resync', function(event){
      var payload = JSON.parse(event.data || '{}');
      var revision = payload.revision || payload.cursor || event.lastEventId || null;
      document.documentElement.setAttribute('data-mnote-tree-live-revision', String(revision || ''));
      dispatchTreeEvent('tree:resync', { payload: payload, revision: revision, bootstrap: bootstrap });
    });

    source.onerror = function(){
      failures += 1;
      applyStatus(failures >= 3 ? 'resync-pending' : 'reconnecting');
      if (failures >= 3) {
        dispatchTreeEvent('tree:resync-requested', { endpoint: bootstrap.resyncEndpoint, workspaceId: workspaceId });
      }
    };
  }

  window.__mnoteTreeLiveClose = closeActiveSource;
  window.addEventListener('pagehide', closeActiveSource, { once: true });

  if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', start, { once: true });
  } else {
    start();
  }
})();
"##;

/// MNOTE Wolai 风格页面布局
///
/// 包含左侧栏 + 内容区的双栏布局。
/// 侧栏显示品牌、导航链接和可选的页面树。
///
/// # 用法
///
/// ```ignore
/// view! {
///     <PageLayout current_nav="home" sidebar_tree_html={None}>
///         <section>...</section>
///     </PageLayout>
/// }
/// ```
#[component]
pub fn PageLayout(
    children: Children,
    current_nav: &'static str,
    /// 侧栏页面树 HTML（可选），由路由 handler 渲染
    #[prop(optional)]
    sidebar_tree_html: Option<String>,
    /// 工作区名称（可选），显示在侧栏顶部
    #[prop(optional)]
    workspace_name: Option<String>,
    /// workspace shell 侧栏 sections HTML（可选），由 projection 渲染
    #[prop(optional)]
    workspace_sidebar_html: Option<String>,
    /// 顶栏当前页面标题（可选）
    #[prop(optional)]
    topbar_title: Option<String>,
) -> impl IntoView {
    let sidebar_tree_html = sidebar_tree_html.unwrap_or_default();

    let ws_name = workspace_name
        .map(|value| value.trim().to_string())
        .filter(|value| !value.is_empty())
        .unwrap_or_else(|| "开发用户 的空间".to_string());
    let topbar_title = topbar_title
        .map(|value| value.trim().to_string())
        .filter(|value| !value.is_empty())
        .unwrap_or_else(|| "个人".to_string());
    let sidebar_sections_html = workspace_sidebar_html
        .map(|value| value.trim().to_string())
        .filter(|value| !value.is_empty())
        .unwrap_or_else(|| {
            let dataset = serde_json::json!({
                "workspaces": [{ "id": "default", "name": ws_name.clone() }],
                "documents": []
            });
            let projection = crate::workspace_shell::build_workspace_shell_projection(
                &dataset, "default", None, &ws_name,
            );
            crate::workspace_shell::render_workspace_shell_sidebar_html(
                &projection,
                Some(sidebar_tree_html.as_str()),
                None,
            )
        });
    let tree_live_bootstrap = serde_json::json!({
        "schema": "mnote.tree_live_bootstrap.v1",
        "transport": "convex-command-log-sse",
        "workspaceId": null,
        "rootIds": [],
        "initialRevision": null,
        "endpoint": "/api/tree/events",
        "resyncEndpoint": "/api/tree/projections/sidebar",
        "views": ["page-tree", "file-tree"]
    })
    .to_string();

    view! {
        <div class="mnote-shell wolai-workspace-shell" data-mnote-web-owner="mnote-web" data-mnote-shell="workspace">
            <aside class="mnote-sidebar wolai-sidebar" data-testid="wolai-sidebar">
                <div class="mnote-sidebar-header wolai-sidebar-header" data-testid="wolai-workspace-identity">
                    <a href="/" class="mnote-sidebar-brand wolai-avatar" aria-label="工作区首页">"L"</a>
                    <button
                        type="button"
                        class="mnote-workspace-source-trigger"
                        data-testid="mnote-workspace-source-trigger"
                        data-mnote-action="open-workspace-source-menu"
                        aria-haspopup="menu"
                        aria-expanded="false"
                        title="切换云空间或本地文件夹"
                    >
                        <span class="sidebar-workspace-name">{ws_name.clone()}</span>
                        <span class="wolai-sidebar-chevron" aria-hidden="true">"⌄"</span>
                    </button>
                </div>
                <nav class="mnote-sidebar-nav wolai-quick-actions" aria-label="快捷操作">
                    <a href="/search" class:active={current_nav == "search"} title="搜索" aria-label="搜索" data-mnote-action="open-search-modal"><span class="material-symbols-outlined nav-icon" data-icon="search" aria-hidden="true"></span></a>
                    <a href="/graph" title="关系图" aria-label="关系图"><span class="material-symbols-outlined nav-icon" data-icon="account_tree" aria-hidden="true"></span></a>
                    <a href="/actions" title="快捷动作" aria-label="快捷动作"><span class="material-symbols-outlined nav-icon" data-icon="bolt" aria-hidden="true"></span></a>
                    <a href="/help" title="帮助" aria-label="帮助"><span class="material-symbols-outlined nav-icon" data-icon="help" aria-hidden="true"></span></a>
                    <a href="/files" title="文件" aria-label="文件"><span class="material-symbols-outlined nav-icon" data-icon="inventory_2" aria-hidden="true"></span></a>
                    <button type="button" title="打开本地文件夹" aria-label="打开本地文件夹" data-mnote-action="open-local-folder"><span class="material-symbols-outlined nav-icon" data-icon="folder_open" aria-hidden="true"></span></button>
                    <a href="/more" title="更多" aria-label="更多"><span class="material-symbols-outlined nav-icon" data-icon="more_horiz" aria-hidden="true"></span></a>
                </nav>
                <div class="wolai-sidebar-body" inner_html={sidebar_sections_html}></div>
                <script id="__MNOTE_TREE_LIVE_BOOTSTRAP__" type="application/json" inner_html={tree_live_bootstrap}></script>
                <script inner_html={SIDEBAR_TREE_JS.to_string()}></script>
                <script id="mnote-tree-live-controller" inner_html={TREE_LIVE_CONTROLLER_JS.to_string()}></script>
            </aside>
            <div class="mnote-main">
                <header class="wolai-topbar" data-testid="wolai-topbar">
                    <div class="wolai-topbar-left">
                        <button type="button" class="wolai-icon-button wolai-menu-button" aria-label="切换侧栏"><span class="material-symbols-outlined" data-icon="menu" aria-hidden="true"></span></button>
                        <nav class="wolai-breadcrumb" aria-label="页面路径">
                            <span class="wolai-breadcrumb-root">{ws_name.clone()}</span>
                            <span class="wolai-breadcrumb-separator" aria-hidden="true">"›"</span>
                            <span class="wolai-breadcrumb-current"><span class="material-symbols-outlined wolai-home-icon" data-icon="home" aria-hidden="true"></span><span data-page-title-current="true">{topbar_title}</span></span>
                        </nav>
                    </div>
                    <div class="wolai-topbar-actions" aria-label="页面操作">
                        <span class="wolai-public-pill" data-testid="wolai-public-state">"全网公开"</span>
                        <button type="button" class="wolai-icon-button" title="收藏" aria-label="收藏"><span class="material-symbols-outlined" data-icon="star" aria-hidden="true"></span></button>
                        <button type="button" class="wolai-icon-button" title="演示" aria-label="演示"><span class="material-symbols-outlined" data-icon="slideshow" aria-hidden="true"></span></button>
                        <button type="button" class="wolai-icon-button" title="评论" aria-label="评论"><span class="material-symbols-outlined" data-icon="comment" aria-hidden="true"></span></button>
                        <button type="button" class="wolai-icon-button" title="分享" aria-label="分享"><span class="material-symbols-outlined" data-icon="share" aria-hidden="true"></span></button>
                        <button type="button" class="wolai-icon-button" title="成员" aria-label="成员"><span class="material-symbols-outlined" data-icon="person_add" aria-hidden="true"></span></button>
                        <button type="button" class="wolai-icon-button" title="页面历史" aria-label="历史" data-mnote-action="open-page-history"><span class="material-symbols-outlined" data-icon="history" aria-hidden="true"></span></button>
                        <button type="button" class="wolai-icon-button" title="页面选项和全局选项" aria-label="更多" data-testid="wolai-page-settings-trigger" data-mnote-action="open-page-settings"><span class="material-symbols-outlined" data-icon="more_horiz" aria-hidden="true"></span></button>
                    </div>
                </header>
                <article class="mnote-content">
                    {children()}
                </article>
                <div class="wolai-floating-actions" aria-label="浮动操作">
                    <button type="button" data-testid="wolai-floating-help" class="wolai-floating-button wolai-floating-button--help" aria-label="帮助"><span class="material-symbols-outlined" data-icon="help" aria-hidden="true"></span></button>
                    <button type="button" data-testid="wolai-floating-ai" class="wolai-floating-button wolai-floating-button--ai" aria-label="AI 助手" title="点击 进入空间智能问答" data-mnote-action="open-page-ai"><span class="material-symbols-outlined material-symbols-filled" data-icon="auto_awesome" aria-hidden="true"></span></button>
                </div>
            </div>
        </div>
    }
}

#[cfg(test)]
mod tests {
    use super::{SIDEBAR_TREE_JS, TREE_LIVE_CONTROLLER_JS};

    #[test]
    fn sidebar_tree_runtime_handles_navigation_drag_and_filetree_actions() {
        assert!(SIDEBAR_TREE_JS.contains("mnoteNavigationInFlight"));
        assert!(SIDEBAR_TREE_JS.contains("data-mnote-navigation-pending"));
        assert!(SIDEBAR_TREE_JS.contains("MNOTE_SIDEBAR_TREE_MODE_KEY"));
        assert!(SIDEBAR_TREE_JS.contains("MNOTE_GLOBAL_SHOW_HEADING_NUMBERS_KEY"));
        assert!(SIDEBAR_TREE_JS.contains("MNOTE_LAST_CLOUD_WORKSPACE_KEY"));
        assert!(SIDEBAR_TREE_JS.contains("data-global-option-checkbox=\"showHeadingNumbers\""));
        assert!(SIDEBAR_TREE_JS.contains("restoreSidebarTreeTab"));
        assert!(SIDEBAR_TREE_JS.contains("treeView"));
        assert!(SIDEBAR_TREE_JS.contains("application/x-mnote-page-tree-node"));
        assert!(SIDEBAR_TREE_JS.contains("dragstart"));
        assert!(SIDEBAR_TREE_JS.contains("drop"));
        assert!(SIDEBAR_TREE_JS.contains("data-drop-feedback"));
        assert!(SIDEBAR_TREE_JS.contains("action: 'move'"));
        assert!(SIDEBAR_TREE_JS.contains("sidebar-file-tree-root"));
        assert!(SIDEBAR_TREE_JS.contains("tree.filetree.open"));
        assert!(SIDEBAR_TREE_JS.contains("tree.asset.open"));
        assert!(SIDEBAR_TREE_JS.contains("tree.filetree.internal-drop"));
        assert!(SIDEBAR_TREE_JS.contains("tree.filetree.external-drop"));
        assert!(SIDEBAR_TREE_JS.contains("MNOTE_RECENT_LOCAL_ROOTS_KEY"));
        assert!(SIDEBAR_TREE_JS.contains("requestOpenLocalFolder"));
        assert!(SIDEBAR_TREE_JS.contains("sourceKind', 'local_folder"));
        assert!(SIDEBAR_TREE_JS.contains("switchToCloudWorkspace"));
        assert!(SIDEBAR_TREE_JS.contains("mnote-switch-cloud-workspace"));
        assert!(SIDEBAR_TREE_JS.contains("mnote-recent-local-root"));
    }

    #[test]
    fn sidebar_tree_runtime_renders_context_menu_and_scoped_title_updates() {
        assert!(SIDEBAR_TREE_JS.contains("openTreeContextMenu"));
        assert!(SIDEBAR_TREE_JS.contains("mnote-tree-context-menu"));
        assert!(SIDEBAR_TREE_JS.contains("复制访问链接"));
        assert!(SIDEBAR_TREE_JS.contains("删除到垃圾桶"));
        assert!(SIDEBAR_TREE_JS.contains(
            r#".tree-row[data-shell-mode="page"][data-node-id="' + escaped + '"] > .tree-link > .tree-link-title"#
        ));
        assert!(SIDEBAR_TREE_JS.contains(
            r#".tree-row[data-shell-mode="filetree"][data-row-id="' + escapedDocRowId + '"] > .tree-link > .tree-link-title"#
        ));
        assert!(!SIDEBAR_TREE_JS.contains(
            r#".tree-row[data-document-id="' + escaped + '"] > .tree-link > .tree-link-title"#
        ));
        assert!(!SIDEBAR_TREE_JS
            .contains(r#"[data-node-id="' + cssEscape(documentId) + '"] .tree-link-title"#));
    }

    #[test]
    fn tree_live_controller_marks_transport_and_closes_source_on_pagehide() {
        assert!(TREE_LIVE_CONTROLLER_JS.contains("convex-command-log-sse"));
        assert!(TREE_LIVE_CONTROLLER_JS.contains("data-mnote-tree-live-transport"));
        assert!(TREE_LIVE_CONTROLLER_JS.contains("pagehide"));
        assert!(TREE_LIVE_CONTROLLER_JS.contains("__mnoteTreeLiveEventSource"));
        assert!(TREE_LIVE_CONTROLLER_JS.contains("tree:snapshot"));
        assert!(TREE_LIVE_CONTROLLER_JS.contains("tree:delta"));
        assert!(TREE_LIVE_CONTROLLER_JS.contains("tree:resync"));
    }
}