export const createSidebarTreeLiveApplyRuntime = (dependencies = {}) => {
  const {
    activeSidebarTreeMode,
    cssEscape,
    currentDocumentId,
    currentFileTreeActiveRowId,
    currentRootUri,
    currentSourceKind,
    currentWorkspaceId,
    escapeHtml,
    fileTreeRuntimeFunction,
    localFilePathFromAssetId,
    navigateToDocument,
    refreshEditorLocalAttachmentExistence,
    restoreSidebarTreeTab,
    rowTitle,
    schedulePendingLocalFolderRestoreFocus,
    shortMindmapFileName,
    syncSidebarFileTreeSelection,
  } = dependencies;

  function updateTitleEverywhere(documentId, title) {
    if (!documentId) return;
    var escaped = cssEscape(documentId);
    var escapedDocRowId = cssEscape('doc:' + documentId);
    var isCurrentDocument = currentDocumentId() === documentId;
    var pageSelectors = [
      '.tree-row[data-shell-mode="page"][data-node-id="' + escaped + '"] > .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'
    ];
    pageSelectors.forEach(function(selector) {
      document.querySelectorAll(selector).forEach(function(node) {
        if (node instanceof HTMLElement) node.textContent = title;
      });
    });
    document.querySelectorAll('.tree-row[data-shell-mode="filetree"][data-row-id="' + escapedDocRowId + '"] > .tree-link > .tree-link-title').forEach(function(node) {
      if (node instanceof HTMLElement) node.textContent = fileTreePageTitle(title);
    });
    document.querySelectorAll('[data-page-title-input="true"][data-document-id="' + escaped + '"]').forEach(function(node) {
      if (!(node instanceof HTMLTextAreaElement)) return;
      node.value = title;
      node.setAttribute('data-title-last-saved', title);
      node.setAttribute('data-title-save-status', 'saved');
      node.style.height = 'auto';
      node.style.height = Math.max(48, node.scrollHeight) + 'px';
    });
    document.querySelectorAll('[data-document-pane="true"][data-pane-document-id="' + escaped + '"] [data-page-title-current="true"]').forEach(function(node) {
      if (node instanceof HTMLElement) node.textContent = title;
    });
    if (isCurrentDocument) {
      document.title = title;
      var topbarCurrent = document.querySelector('.wolai-breadcrumb-current [data-page-title-current]');
      if (topbarCurrent instanceof HTMLElement) topbarCurrent.textContent = title;
    }
  }

  function fileTreePageTitle(title) {
    var normalized = String(title || '无标题').trim() || '无标题';
    return normalized.endsWith('.md') ? normalized : normalized + '.md';
  }

  function isFileTreePageRow(row) {
    if (!(row instanceof HTMLElement)) return false;
    if (row.getAttribute('data-asset-id')) return false;
    var rowKind = row.getAttribute('data-row-kind') || '';
    return rowKind === 'document' || rowKind === 'doc' || rowKind === 'index' || rowKind === 'markdown';
  }

  function normalizeFileTreePageRenameTitle(value) {
    var normalized = String(value || '').trim();
    if (/\.md$/i.test(normalized)) normalized = normalized.slice(0, -3).trim();
    return normalized;
  }

  function validateFileTreeRename(row, draft) {
    var raw = String(draft || '').trim();
    if (!raw) return '名称不能为空';
    if (/[\\/:*?"<>|]/.test(raw)) return '文件名不能包含 / \\ : * ? " < > |';
    if (!isFileTreePageRow(row)) return '';
    var pageTitle = normalizeFileTreePageRenameTitle(raw);
    if (!pageTitle) return '名称不能为空';
    var expectedFileName = fileTreePageTitle(pageTitle).toLocaleLowerCase();
    var rowId = row.getAttribute('data-row-id') || '';
    var parentId = row.getAttribute('data-parent-id') || '';
    var siblings = Array.from(document.querySelectorAll('#sidebar-file-tree-root .tree-row[data-shell-mode="filetree"][data-row-kind="document"], #sidebar-file-tree-root .tree-row[data-shell-mode="filetree"][data-row-kind="doc"], #sidebar-file-tree-root .tree-row[data-shell-mode="filetree"][data-row-kind="markdown"]'));
    var duplicate = siblings.some(function(sibling) {
      if (!(sibling instanceof HTMLElement)) return false;
      if ((sibling.getAttribute('data-row-id') || '') === rowId) return false;
      if ((sibling.getAttribute('data-parent-id') || '') !== parentId) return false;
      return fileTreePageTitle(normalizeFileTreePageRenameTitle(rowTitle(sibling))).toLocaleLowerCase() === expectedFileName;
    });
    return duplicate ? '同级已存在同名页面' : '';
  }

  function documentIdFromDelta(data) {
    return String(data && (data.documentId || data.id || (data.document && data.document.id) || (data.node && data.node.id) || (data.args && data.args.documentId)) || '').trim();
  }

  function parentIdFromDelta(data) {
    if (!data || typeof data !== 'object') return null;
    if (Object.prototype.hasOwnProperty.call(data, 'parentId')) return data.parentId ? String(data.parentId).trim() : null;
    if (Object.prototype.hasOwnProperty.call(data, 'parent_id')) return data.parent_id ? String(data.parent_id).trim() : null;
    if (data.args && Object.prototype.hasOwnProperty.call(data.args, 'parentId')) return data.args.parentId ? String(data.args.parentId).trim() : null;
    return null;
  }

  function treeRootForMode(mode) {
    var id = mode === 'filetree' ? 'sidebar-file-tree-root' : 'sidebar-tree-root';
    return document.querySelector('#' + id + ' .tree-root');
  }

  function rowSelectorForDocument(mode, documentId) {
    var escaped = cssEscape(documentId);
    if (mode === 'filetree') {
      return '.tree-row[data-shell-mode="filetree"][data-doc-id="' + escaped + '"], .tree-row[data-shell-mode="filetree"][data-document-id="' + escaped + '"]';
    }
    return '.tree-row[data-shell-mode="page"][data-node-id="' + escaped + '"]';
  }

  function ensureTreeChildren(parentRow) {
    var parentNode = parentRow ? parentRow.closest('.tree-node') : null;
    if (!parentNode) return null;
    var children = parentNode.querySelector(':scope > .tree-children');
    if (!children) {
      children = document.createElement('ul');
      children.className = 'tree-children';
      parentNode.appendChild(children);
    }
    children.classList.remove('tree-children--collapsed');
    parentRow.setAttribute('aria-expanded', 'true');
    var toggle = parentRow.querySelector('[data-rust-action="toggle"]');
    if (toggle) toggle.setAttribute('aria-expanded', 'true');
    return children;
  }

  function removeDocumentRowForMode(mode, documentId) {
    var row = document.querySelector(rowSelectorForDocument(mode, documentId));
    var node = row ? row.closest('.tree-node') : null;
    if (!node || !node.parentElement) return false;
    node.parentElement.removeChild(node);
    return true;
  }

  function commandDocumentId(result, fallback) {
    var value = result && (
      (result.execution && (result.execution.documentId || result.execution.id || result.execution.nodeId)) ||
      result.documentId ||
      result.id ||
      result.nodeId ||
      (result.document && (result.document.id || result.document.documentId)) ||
      (result.node && (result.node.id || result.node.documentId)) ||
      (result.payload && result.payload.documentId)
    );
    return String(value || fallback || '').trim();
  }

  function commandDocumentTitle(result, fallback) {
    var value = result && (
      (result.execution && result.execution.title) ||
      result.title ||
      (result.document && result.document.title) ||
      (result.node && result.node.title) ||
      (result.payload && result.payload.title)
    );
    return String(value || fallback || '新页面').trim() || '新页面';
  }

  function normalizeDocumentRowId(value) {
    return String(value || '').trim().replace(/^doc:/, '').replace(/^index:/, '');
  }

  function appendRenderedTreeNode(container, html) {
    if (!container || !html) return false;
    var empty = container.querySelector(':scope > .tree-empty');
    if (empty && empty.parentElement) empty.parentElement.removeChild(empty);
    var template = document.createElement('template');
    template.innerHTML = html;
    var node = template.content.firstElementChild;
    if (!node) return false;
    container.appendChild(node);
    return true;
  }

  function localPageInsertDepth(parentId) {
    if (!parentId) return 0;
    var parentRow = document.querySelector(rowSelectorForDocument('page', parentId));
    var depth = parentRow ? Number(parentRow.getAttribute('data-depth') || 0) : 0;
    return Number.isFinite(depth) ? depth + 1 : 1;
  }

  function upsertPageDocumentRow(documentId, parentId, title) {
    if (!documentId) return false;
    var existing = document.querySelector(rowSelectorForDocument('page', documentId));
    if (existing instanceof HTMLElement) {
      updateTitleEverywhere(documentId, title);
      moveDocumentRowForMode('page', documentId, parentId || null);
      return true;
    }
    var root = treeRootForMode('page');
    if (!root) return false;
    var targetContainer = root;
    if (parentId) {
      var parentRow = document.querySelector(rowSelectorForDocument('page', parentId));
      targetContainer = ensureTreeChildren(parentRow);
      if (!targetContainer) targetContainer = root;
    }
    var grouped = new Map();
    grouped.set(parentId || '', [{
      id: documentId,
      nodeId: documentId,
      documentId: documentId,
      parentNodeId: parentId || '',
      rowKind: 'document',
      title: title,
      expandable: false,
      childCount: 0
    }]);
    return appendRenderedTreeNode(targetContainer, renderPageRows(parentId || '', grouped, currentDocumentId(), localPageInsertDepth(parentId)));
  }

  function fileTreeParentContainer(parentId) {
    var root = treeRootForMode('filetree');
    if (!root) return null;
    if (!parentId) return root;
    var parentRow = document.querySelector('.tree-row[data-shell-mode="filetree"][data-row-id="' + cssEscape('doc:' + parentId) + '"]');
    var children = ensureTreeChildren(parentRow);
    return children || root;
  }

  function localFileInsertDepth(parentId) {
    if (!parentId) return 0;
    var parentRow = document.querySelector('.tree-row[data-shell-mode="filetree"][data-row-id="' + cssEscape('doc:' + parentId) + '"]');
    var level = parentRow ? Number(parentRow.getAttribute('aria-level') || 1) : 1;
    return Number.isFinite(level) ? level : 1;
  }

  function upsertFileDocumentRows(documentId, parentId, title) {
    if (!documentId) return false;
    var existing = document.querySelector('.tree-row[data-shell-mode="filetree"][data-row-id="' + cssEscape('doc:' + documentId) + '"]');
    if (existing instanceof HTMLElement) {
      updateTitleEverywhere(documentId, title);
      moveDocumentRowForMode('filetree', documentId, parentId || null);
      return true;
    }
    var targetContainer = fileTreeParentContainer(parentId);
    if (!targetContainer) return false;
    var parentNodeId = parentId ? 'doc:' + parentId : '';
    var docNodeId = 'doc:' + documentId;
    var depth = localFileInsertDepth(parentId);
    var grouped = new Map();
    grouped.set(parentNodeId, [{
      id: docNodeId,
      nodeId: docNodeId,
      rowId: docNodeId,
      rowKind: 'document',
      title: fileTreePageTitle(title),
      documentId: documentId,
      parentNodeId: parentNodeId,
      depth: depth,
      expandable: false,
      childCount: 0
    }]);
    return appendRenderedTreeNode(targetContainer, renderFileRows(parentNodeId, grouped, currentDocumentId()));
  }

  function applyCreatedDocumentLocally(result, parentId, fallbackTitle) {
    var documentId = commandDocumentId(result, null);
    if (!documentId) return false;
    var normalizedParentId = normalizeDocumentRowId(parentId);
    var title = commandDocumentTitle(result, fallbackTitle);
    var pageChanged = upsertPageDocumentRow(documentId, normalizedParentId, title);
    var fileChanged = upsertFileDocumentRows(documentId, normalizedParentId, title);
    if (pageChanged || fileChanged) {
      document.documentElement.setAttribute('data-mnote-tree-local-command-applied', 'create');
    }
    return pageChanged || fileChanged;
  }

  function localCommandNeedsProjectionRefresh(action, result) {
    if (currentSourceKind() !== 'local_folder') return false;
    if (action === 'create' || action === 'rename' || action === 'move' || action === 'delete' || action === 'archive' || action === 'trash' || action === 'purge') {
      return true;
    }
    if (result && (result.previousDocumentId || result.previousRelativePath || result.relativePath || result.trashPath)) {
      return true;
    }
    return false;
  }

  function sortOrderFromDelta(data) {
    var raw = data && (data.sortOrder ?? data.sort_order);
    var value = Number(raw);
    return Number.isFinite(value) && value >= 0 ? Math.floor(value) : null;
  }

  function insertTreeNodeAtSortOrder(targetContainer, node, sortOrder) {
    if (!targetContainer || !node) return false;
    if (sortOrder === null || sortOrder === undefined) {
      targetContainer.appendChild(node);
      return true;
    }
    var siblings = Array.from(targetContainer.querySelectorAll(':scope > .tree-node')).filter(function(candidate) {
      return candidate !== node;
    });
    var targetIndex = Math.max(0, Math.min(Number(sortOrder), siblings.length));
    var referenceNode = siblings[targetIndex] || null;
    if (referenceNode) targetContainer.insertBefore(node, referenceNode);
    else targetContainer.appendChild(node);
    return true;
  }

  function moveDocumentRowForMode(mode, documentId, parentId, sortOrder) {
    var row = document.querySelector(rowSelectorForDocument(mode, documentId));
    var node = row ? row.closest('.tree-node') : null;
    var root = treeRootForMode(mode);
    if (!row || !node || !root) return false;
    var targetContainer = root;
    if (parentId) {
      var parentRow = document.querySelector(rowSelectorForDocument(mode, parentId));
      targetContainer = ensureTreeChildren(parentRow);
      if (!targetContainer) return false;
      row.setAttribute('data-parent-id', parentId);
    } else {
      row.removeAttribute('data-parent-id');
    }
    return insertTreeNodeAtSortOrder(targetContainer, node, sortOrder);
  }

  function applyMoveDocumentDelta(data) {
    var documentId = documentIdFromDelta(data);
    if (!documentId) return false;
    var parentId = parentIdFromDelta(data);
    var sortOrder = sortOrderFromDelta(data);
    var movedPage = moveDocumentRowForMode('page', documentId, parentId, sortOrder);
    var movedFile = moveDocumentRowForMode('filetree', documentId, parentId, sortOrder);
    return movedPage || movedFile;
  }

  function applyRemoveDocumentDelta(data) {
    var documentId = documentIdFromDelta(data);
    if (!documentId) return false;
    var removedPage = removeDocumentRowForMode('page', documentId);
    var removedFile = removeDocumentRowForMode('filetree', documentId);
    return removedPage || removedFile;
  }

  function readProjection(value) {
    var runtimeFn = fileTreeRuntimeFunction('readProjection');
    if (runtimeFn) return runtimeFn(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 readSidebarDataset(value) {
    var runtimeFn = fileTreeRuntimeFunction('readSidebarDataset');
    if (runtimeFn) return runtimeFn(value);
    if (!value || typeof value !== 'object') return null;
    if (value.snapshot && value.snapshot.dataset && typeof value.snapshot.dataset === 'object') return value.snapshot.dataset;
    if (value.data && value.data.dataset && typeof value.data.dataset === 'object') return value.data.dataset;
    if (value.dataset && typeof value.dataset === 'object') return value.dataset;
    if (value.sidebar && typeof value.sidebar === 'object') return value.sidebar;
    return null;
  }

  function readDatasetProjection(value, snakeCaseKey, camelCaseKey) {
    var runtimeFn = fileTreeRuntimeFunction('readDatasetProjection');
    if (runtimeFn) return runtimeFn(value, snakeCaseKey, camelCaseKey);
    var dataset = readSidebarDataset(value);
    if (!dataset || typeof dataset !== 'object') return null;
    if (dataset[snakeCaseKey] && typeof dataset[snakeCaseKey] === 'object') return dataset[snakeCaseKey];
    if (dataset[camelCaseKey] && typeof dataset[camelCaseKey] === 'object') return dataset[camelCaseKey];
    return null;
  }

  function setTreeLiveApplyError(reason) {
    document.documentElement.setAttribute('data-mnote-tree-live-apply-error', String(reason || 'tree_live_apply_failed'));
  }

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

  function hasProjectionItems(projection) {
    var runtimeFn = fileTreeRuntimeFunction('hasProjectionItems');
    if (runtimeFn) return runtimeFn(projection);
    var resolved = readProjection(projection);
    return Boolean(resolved && Array.isArray(resolved.items));
  }

  function nodeIdOf(item) {
    var runtimeFn = fileTreeRuntimeFunction('nodeIdOf');
    if (runtimeFn) return runtimeFn(item);
    return String(item && (item.nodeId || item.id || item.documentId) || '').trim();
  }

  function rowIdOf(item) {
    var runtimeFn = fileTreeRuntimeFunction('rowIdOf');
    if (runtimeFn) return runtimeFn(item);
    return String(item && (item.rowId || item.nodeId || item.id) || '').trim();
  }

  function parentIdOf(item) {
    var runtimeFn = fileTreeRuntimeFunction('parentIdOf');
    if (runtimeFn) return runtimeFn(item);
    return String(item && (item.parentNodeId || item.parentId || '') || '').trim();
  }

  function titleOf(item) {
    var runtimeFn = fileTreeRuntimeFunction('titleOf');
    if (runtimeFn) return runtimeFn(item);
    return String(item && item.title || '无标题').trim() || '无标题';
  }

  function fileWorkspaceRelativePath(item) {
    var runtimeFn = fileTreeRuntimeFunction('fileWorkspaceRelativePath');
    if (runtimeFn) return runtimeFn(item);
    var meta = item && item.resourceMeta && typeof item.resourceMeta === 'object' ? item.resourceMeta : {};
    var workspacePath = meta.workspacePath && typeof meta.workspacePath === 'object' ? meta.workspacePath : {};
    var fromWorkspacePath = String(workspacePath.relativePath || '').trim();
    if (fromWorkspacePath) return fromWorkspacePath;
    var extra = meta.extra && typeof meta.extra === 'object' ? meta.extra : {};
    var source = extra.source && typeof extra.source === 'object' ? extra.source : {};
    var fromSource = String(source.relativePath || '').trim();
    if (fromSource) return fromSource;
    return String(item && (item.relativePath || item.rootRelativePath) || '').trim();
  }

  function groupRowsByParent(rows) {
    var runtimeFn = fileTreeRuntimeFunction('groupRowsByParent');
    if (runtimeFn) return runtimeFn(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 meta = item && item.resourceMeta && typeof item.resourceMeta === 'object' ? item.resourceMeta : {};
      var openable = Boolean(meta.documentId || item.documentId || !String(nodeId).startsWith('local-dir:'));
      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
        ? '<ul class="tree-children' + (expanded ? '' : ' tree-children--collapsed') + '">' + 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-page-openable="' + String(openable) + '" 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) + '" data-page-openable="' + String(openable) + '" title="' + escapeHtml(title) + '"><span class="tree-link-title" title="' + escapeHtml(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();
    var activeRowId = currentFileTreeActiveRowId();
    tree.innerHTML = '<ul class="tree-root" role="tree" data-rust-page-renderer="initial_v1">' + (rows.length ? renderPageRows('', groupRowsByParent(rows), activeId, 0) : '') + '</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 fileObjectIdentity(item) {
    var meta = item && item.resourceMeta && typeof item.resourceMeta === 'object' ? item.resourceMeta : {};
    // Phase A1: workspacePath 优先于旧猜测逻辑
    var wp = meta.workspacePath;
    if (wp && typeof wp === 'object' && wp.objectIdentity && typeof wp.objectIdentity === 'object') {
      return wp.objectIdentity;
    }
    if (meta.objectIdentity && typeof meta.objectIdentity === 'object') return meta.objectIdentity;
    var rowKind = String(item && item.rowKind || '');
    var documentId = fileDocumentId(item) || null;
    var assetId = fileAssetId(item) || null;
    var iconKind = iconKindOf(item);
    var objectKind = rowKind === 'document' ? 'page' : rowKind === 'index' ? 'index' : iconKind === 'mindmap' ? 'mindmap' : 'attachment';
    return { objectKind: objectKind, documentId: documentId, blockId: null, assetId: assetId };
  }

  function fileOwnerDocumentId(item, fallbackDocumentId, objectIdentity) {
    var identity = objectIdentity && typeof objectIdentity === 'object' ? objectIdentity : fileObjectIdentity(item);
    var owner = String(identity && identity.documentId || '').trim();
    if (owner) return owner;
    var assetId = fileAssetId(item);
    var localPath = localFilePathFromAssetId(assetId);
    if (localPath && localPath.indexOf('/') > 0) {
      var parts = localPath.split('/');
      var bundleName = parts[0] || '';
      if (bundleName) return 'local-md:' + bundleName + '~2F' + bundleName + '.md';
    }
    return String(fallbackDocumentId || '').trim();
  }

  function objectIdentityAttr(identity) {
    try {
      return JSON.stringify(identity || {});
    } catch (_error) {
      return '';
    }
  }

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

  function fileCapabilitiesAttr(item) {
    try {
      return JSON.stringify(Array.isArray(item && item.capabilities) ? item.capabilities : []);
    } catch (_error) {
      return '[]';
    }
  }

  function isFileTreeProjectionPageRow(rowKind, assetId) {
    if (assetId) return false;
    return rowKind === 'document' || rowKind === 'doc' || rowKind === 'markdown';
  }

  function normalizeMindmapFileTreeTitle(rawTitle, assetId, iconKind, objectIdentity) {
    var title = String(rawTitle || '').trim();
    var isMindmap = iconKind === 'mindmap' || String(objectIdentity && objectIdentity.objectKind || '') === 'mindmap';
    if (!isMindmap) return title || '无标题';
    return title || shortMindmapFileName(assetId);
  }

  function renderFileRows(parentId, grouped, activeId, activeRowId) {
    return (grouped.get(parentId) || []).map(function(item) {
      var nodeId = nodeIdOf(item);
      var rowId = rowIdOf(item);
      var rowKind = String(item.rowKind || 'document');
      var rawTitle = titleOf(item);
      var depth = Number(item.depth || 0);
      var parent = parentIdOf(item);
      var documentId = fileDocumentId(item);
      var assetId = fileAssetId(item);
      var relativePath = fileWorkspaceRelativePath(item);
      var objectIdentity = fileObjectIdentity(item);
      var ownerDocumentId = fileOwnerDocumentId(item, documentId, objectIdentity);
      var iconKind = iconKindOf(item);
      var title = isFileTreeProjectionPageRow(rowKind, assetId)
        ? fileTreePageTitle(rawTitle)
        : normalizeMindmapFileTreeTitle(rawTitle, assetId, iconKind, objectIdentity);
      var children = grouped.get(nodeId) || [];
      var expandable = Boolean(item.expandable || item.childCount > 0 || children.length);
      var expanded = expandable && item.expandedByDefault !== false;
      var selected = activeRowId ? rowId === activeRowId : rowId === 'doc:' + 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
        ? '<ul class="tree-children' + (expanded ? '' : ' tree-children--collapsed') + '">' + renderFileRows(nodeId, grouped, activeId, activeRowId) + '</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-owner-document-id="' + escapeHtml(ownerDocumentId) + '" data-asset-id="' + escapeHtml(assetId) + '" data-local-relative-path="' + escapeHtml(relativePath) + '" data-object-identity="' + escapeHtml(objectIdentityAttr(objectIdentity)) + '" data-object-kind="' + escapeHtml(String(objectIdentity.objectKind || '')) + '" data-capabilities="' + escapeHtml(fileCapabilitiesAttr(item)) + '" data-shell-mode="filetree" data-selected="' + String(selected) + '" data-active="false" draggable="true">' + toggle + '<span class="tree-kind-badge" data-kind="' + escapeHtml(iconKind) + '" 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-owner-document-id="' + escapeHtml(ownerDocumentId) + '" data-asset-id="' + escapeHtml(assetId) + '" data-local-relative-path="' + escapeHtml(relativePath) + '" title="' + escapeHtml(title) + '"><span class="tree-link-title" title="' + escapeHtml(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();
    var activeRowId = currentFileTreeActiveRowId();
    tree.innerHTML = '<ul class="tree-root" role="tree" data-rust-filetree-renderer="initial_v1">' + (rows.length ? renderFileRows('', groupRowsByParent(rows), activeId, activeRowId) : '') + '</ul>';
    return true;
  }

  function renderSidebarSnapshot(payload) {
    var renderedPage = hasProjectionItems(payload) ? renderPageProjection(payload) : false;
    var fileProjection = readDatasetProjection(payload, 'kernel_file_tree_projection', 'kernelFileTreeProjection');
    var renderedFile = fileProjection && hasProjectionItems(fileProjection) ? renderFileProjection(fileProjection) : false;
    return renderedPage || renderedFile;
  }

  function replaceSidebarTreeFromDocument(nextDocument, rootId) {
    var runtimeFn = fileTreeRuntimeFunction('replaceSidebarTreeFromDocument');
    if (runtimeFn) return runtimeFn(nextDocument, rootId);
    var current = document.getElementById(rootId);
    var next = nextDocument ? nextDocument.getElementById(rootId) : null;
    if (!(current instanceof HTMLElement) || !(next instanceof HTMLElement)) return false;
    current.innerHTML = next.innerHTML;
    Array.from(next.attributes || []).forEach(function(attr) {
      current.setAttribute(attr.name, attr.value);
    });
    return true;
  }

  function applyLocalFolderSidebarSnapshot(nextDocument, options) {
    var runtimeFn = fileTreeRuntimeFunction('applyLocalFolderSidebarSnapshot');
    if (runtimeFn) return runtimeFn(nextDocument, options);
    options = options || {};
    var pageRootId = String(options.pageRootId || 'sidebar-tree-root');
    var fileRootId = String(options.fileRootId || 'sidebar-file-tree-root');
    var appliedPage = replaceSidebarTreeFromDocument(nextDocument, pageRootId);
    var appliedFile = replaceSidebarTreeFromDocument(nextDocument, fileRootId);
    var applied = appliedPage || appliedFile;
    if (applied && typeof options.onApplied === 'function') options.onApplied({
      pageRootApplied: appliedPage,
      fileRootApplied: appliedFile
    });
    return applied;
  }

  function markLocalFolderWatchApplied(value) {
    var runtimeFn = fileTreeRuntimeFunction('markLocalFolderWatchApplied');
    if (runtimeFn) return runtimeFn(value);
    var appliedValue = String(value || 'projection');
    document.documentElement.setAttribute('data-mnote-local-folder-watch-applied', appliedValue);
    return true;
  }

  async function refreshLocalFolderSidebarSnapshot() {
    var workspaceId = currentWorkspaceId();
    var rootUri = currentRootUri();
    var currentId = currentDocumentId();
    if (!workspaceId || !rootUri) return false;

    var sidebarUrl = new URL('/api/tree/projections/sidebar', window.location.origin);
    sidebarUrl.searchParams.set('workspaceId', workspaceId);
    sidebarUrl.searchParams.set('sourceKind', 'local_folder');
    sidebarUrl.searchParams.set('rootUri', rootUri);
    if (currentId) sidebarUrl.searchParams.set('rootNodeId', currentId);
    var fileUrl = new URL('/api/tree/projections/file', window.location.origin);
    fileUrl.searchParams.set('workspaceId', workspaceId);
    fileUrl.searchParams.set('sourceKind', 'local_folder');
    fileUrl.searchParams.set('rootUri', rootUri);
    if (currentId) fileUrl.searchParams.set('rootNodeId', currentId);

    var responses = await Promise.all([
      fetch(sidebarUrl.toString(), { headers: { accept: 'application/json' } }),
      fetch(fileUrl.toString(), { headers: { accept: 'application/json' } })
    ]);
    if (!responses[0].ok && !responses[1].ok) return false;

    var sidebarPayload = responses[0].ok ? await responses[0].json().catch(function() { return null; }) : null;
    var filePayload = responses[1].ok ? await responses[1].json().catch(function() { return null; }) : null;
    var renderedPage = sidebarPayload ? renderSidebarSnapshot(sidebarPayload.result || sidebarPayload) : false;
    var renderedFile = filePayload ? renderFileProjection(filePayload.result || filePayload) : false;
    if (!renderedPage && !renderedFile) return false;
    syncSidebarFileTreeSelection();
    schedulePendingLocalFolderRestoreFocus();
    restoreSidebarTreeTab();
    refreshEditorLocalAttachmentExistence();
    markLocalFolderWatchApplied('projection');
    return true;
  }

  function startLocalFolderSidebarWatch() {
    if (currentSourceKind() !== 'local_folder') return;
    var rootUri = currentRootUri();
    if (!rootUri) return;
    var revision = '';
    var refreshTimer = 0;
    var scheduleRefresh = function() {
      if (refreshTimer) return;
      refreshTimer = window.setTimeout(function() {
        refreshTimer = 0;
        void refreshLocalFolderSidebarSnapshot();
      }, 180);
    };
    var poll = async function() {
      if (document.hidden) return;
      // If tree live SSE transport is active for local_folder, skip polling (fallback)
      var treeTransport = document.documentElement.getAttribute('data-mnote-tree-live-transport') || '';
      if (treeTransport === 'local-folder-events') return;
      var url = new URL('/api/tree/local-folder-watch', window.location.origin);
      url.searchParams.set('rootUri', rootUri);
      var response = await fetch(url.toString(), { headers: { accept: 'application/json' } });
      if (!response.ok) return;
      var payload = await response.json();
      var nextRevision = payload && payload.result && typeof payload.result.revision === 'string'
        ? payload.result.revision
        : '';
      if (!nextRevision) return;
      if (!revision) {
        revision = nextRevision;
        return;
      }
      if (nextRevision !== revision) {
        revision = nextRevision;
        scheduleRefresh();
      }
    };
    window.setInterval(function() {
      void poll();
    }, 1200);
    void poll();
  }

  function isTitleOnlyDocumentPatch(candidate) {
    if (!candidate || typeof candidate !== 'object') return false;
    var allowedKeys = {
      id: true,
      documentId: true,
      title: true,
      updatedAt: true,
      updated_at: true
    };
    return Object.keys(candidate).every(function(key) {
      return allowedKeys[key] === true;
    });
  }

  function deltaNeedsProjectionRefresh(payload) {
    var data = payload && (payload.data || payload.delta || payload);
    var op = data && typeof data.op === 'string' ? String(data.op).trim() : '';
    if (!op || op === 'noop') return false;
    if (op === 'upsert_document') {
      return !isTitleOnlyDocumentPatch(data.node || data.document || null);
    }
    if (op === 'upsert_documents') {
      var documents = Array.isArray(data.upsertDocuments) ? data.upsertDocuments : Array.isArray(data.upsert_documents) ? data.upsert_documents : [];
      if (documents.length > 0 && documents.every(isTitleOnlyDocumentPatch)) {
        return false;
      }
    }
    return true;
  }

  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 installTreeLiveApplyEventListeners() {
    window.addEventListener('tree:title-updated', function(event) {
    var detail = event.detail || {};
    var previousDocumentId = detail.previousDocumentId || (detail.payload && detail.payload.result && detail.payload.result.previousDocumentId) || '';
    if (previousDocumentId && previousDocumentId !== detail.documentId) {
      removeDocumentRowForMode('page', previousDocumentId);
      removeDocumentRowForMode('filetree', previousDocumentId);
      if (currentDocumentId() === previousDocumentId) {
        navigateToDocument(detail.documentId, detail.workspaceId || currentWorkspaceId(), { treeView: activeSidebarTreeMode() });
      }
    }
    updateTitleEverywhere(detail.documentId, detail.title);
    if (currentSourceKind() === 'local_folder') void refreshLocalFolderSidebarSnapshot();
    document.documentElement.setAttribute('data-mnote-title-local-applied', 'true');
    });

    window.addEventListener('tree:local-command', function(event) {
    var detail = event.detail || {};
    var body = detail.body || {};
    var action = String(body.action || '').trim();
    var result = detail.result || {};
    if (action === 'create') {
      applyCreatedDocumentLocally(result, body.parentId || null, body.title || '新页面');
      if (localCommandNeedsProjectionRefresh(action, result)) void refreshLocalFolderSidebarSnapshot();
      return;
    }
    if (action === 'rename' && body.documentId && body.title) {
      var newDocumentId = commandDocumentId(result, body.documentId);
      if (newDocumentId && newDocumentId !== body.documentId) {
        removeDocumentRowForMode('page', body.documentId);
        removeDocumentRowForMode('filetree', body.documentId);
        if (currentDocumentId() === body.documentId) {
          navigateToDocument(newDocumentId, body.workspaceId || currentWorkspaceId(), { treeView: activeSidebarTreeMode() });
        }
      } else {
        updateTitleEverywhere(body.documentId, body.title);
      }
      if (localCommandNeedsProjectionRefresh(action, result)) void refreshLocalFolderSidebarSnapshot();
      document.documentElement.setAttribute('data-mnote-tree-local-command-applied', 'rename');
      return;
    }
    if (action === 'move' && body.documentId) {
      if (applyMoveDocumentDelta({ documentId: body.documentId, parentId: body.parentId || null, sortOrder: body.sortOrder })) {
        document.documentElement.setAttribute('data-mnote-tree-local-command-applied', 'move');
      }
      if (localCommandNeedsProjectionRefresh(action, result)) void refreshLocalFolderSidebarSnapshot();
      return;
    }
    if ((action === 'purge' || action === 'delete' || action === 'archive') && body.documentId) {
      if (applyRemoveDocumentDelta({ documentId: body.documentId })) {
        document.documentElement.setAttribute('data-mnote-tree-local-command-applied', 'remove');
      }
      if (localCommandNeedsProjectionRefresh(action, result)) void refreshLocalFolderSidebarSnapshot();
    }
    });

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

    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 documentPatch = data && (data.document || data.node);
    if (data && data.op === 'upsert_document' && documentPatch) {
      updateTitleEverywhere(documentPatch.id || documentPatch.documentId, documentPatch.title || '无标题');
    }
    if (data && data.op === 'move_document' && applyMoveDocumentDelta(data)) {
      document.documentElement.setAttribute('data-mnote-tree-live-applied', 'delta');
      return;
    }
    if (data && data.op === 'remove_document' && applyRemoveDocumentDelta(data)) {
      document.documentElement.setAttribute('data-mnote-tree-live-applied', 'delta');
      return;
    }
    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');
      });
    }
    if (renderSidebarSnapshot(payload)) {
      document.documentElement.setAttribute('data-mnote-tree-live-applied', 'delta');
      return;
    }
    document.documentElement.setAttribute('data-mnote-tree-live-applied', 'delta');
    if (deltaNeedsProjectionRefresh(payload)) {
      setTreeLiveApplyError('tree_delta_missing_projection_payload');
    }
    });

    window.addEventListener('tree:resync', function(event) {
    var payload = event.detail && event.detail.payload ? event.detail.payload : event.detail;
    if (renderSidebarSnapshot(payload)) {
      refreshEditorLocalAttachmentExistence();
      document.documentElement.setAttribute('data-mnote-tree-live-applied', 'resync');
      return;
    }
    document.documentElement.setAttribute('data-mnote-tree-live-applied', 'resync');
    setTreeLiveApplyError('tree_resync_missing_projection_payload');
    });
  }

  return {
    applyCreatedDocumentLocally,
    applyMoveDocumentDelta,
    applyRemoveDocumentDelta,
    commandDocumentId,
    commandDocumentTitle,
    deltaNeedsProjectionRefresh,
    fileTreePageTitle,
    installTreeLiveApplyEventListeners,
    isFileTreePageRow,
    localCommandNeedsProjectionRefresh,
    normalizeFileTreePageRenameTitle,
    objectIdentityAttr,
    refreshLocalFolderSidebarSnapshot,
    removeDocumentRowForMode,
    renderSidebarSnapshot,
    setTreeLiveApplyError,
    startLocalFolderSidebarWatch,
    toggleChildren,
    updateTitleEverywhere,
    validateFileTreeRename,
  };
};