feat: first cut at menu editor

src/renderer/components/Editor/Editor.tsx

@@ -14,6 +14,7 @@ import { TagsView } from '../TagsView';
 import { TagInput } from '../TagInput';
 import { ChatPanel } from '../ChatPanel';
 import { ImportAnalysisView } from '../ImportAnalysisView';
+import { MenuEditorView } from '../MenuEditorView/MenuEditorView';
 import { MetadataDiffPanel } from '../MetadataDiffPanel';
 import { GitDiffView } from '../GitDiffView/GitDiffView';
 import { DocumentationView } from '../DocumentationView/DocumentationView';
@@ -1784,6 +1785,7 @@ export const Editor: React.FC = () => {
     chat: () => (editorRoute.tabId ? <ChatPanel key={editorRoute.tabId} conversationId={editorRoute.tabId} /> : <Dashboard />),
     import: () =>
       editorRoute.tabId ? <ImportAnalysisView key={editorRoute.tabId} definitionId={editorRoute.tabId} /> : <Dashboard />,
+    'menu-editor': () => <MenuEditorView />,
     'metadata-diff': () => <MetadataDiffPanel />,
     'git-diff': () =>
       editorRoute.tabId && editorRoute.gitDiffResource

src/renderer/components/MenuEditorView/MenuEditorView.css

@@ -0,0 +1,196 @@
+.menu-editor-view {
+  padding: 1rem;
+  height: 100%;
+  display: flex;
+  flex-direction: column;
+  gap: 0.75rem;
+  position: relative;
+}
+
+.menu-editor-header {
+  display: flex;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: 1rem;
+}
+
+.menu-editor-header h2 {
+  margin: 0;
+}
+
+.menu-editor-header p {
+  margin: 0.25rem 0 0;
+  color: var(--vscode-descriptionForeground);
+}
+
+.menu-editor-loading,
+.menu-editor-empty {
+  color: var(--vscode-descriptionForeground);
+}
+
+.menu-editor-main {
+  display: grid;
+  grid-template-columns: minmax(480px, 1fr) minmax(280px, 340px);
+  gap: 0.75rem;
+  min-height: 0;
+  flex: 1;
+}
+
+.menu-editor-tree-wrap,
+.menu-editor-details {
+  border: 1px solid var(--vscode-panel-border);
+  border-radius: 6px;
+  background: var(--vscode-editor-background);
+  padding: 0.5rem;
+  min-height: 0;
+}
+
+.menu-editor-toolbar {
+  display: flex;
+  align-items: center;
+  gap: 0.2rem;
+  margin-bottom: 0.5rem;
+  padding-bottom: 0.4rem;
+  border-bottom: 1px solid var(--vscode-panel-border);
+}
+
+.menu-editor-tool {
+  width: 1.8rem;
+  height: 1.8rem;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  border: 1px solid transparent;
+  border-radius: 4px;
+  background: transparent;
+  color: var(--vscode-foreground);
+  cursor: pointer;
+  padding: 0;
+}
+
+.menu-editor-tool:hover:not(:disabled) {
+  background: var(--vscode-toolbar-hoverBackground);
+  border-color: var(--vscode-panel-border);
+}
+
+.menu-editor-tool:disabled {
+  opacity: 0.45;
+  cursor: not-allowed;
+}
+
+.menu-editor-row {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  padding: 0.2rem 0.4rem;
+  border-radius: 4px;
+  cursor: pointer;
+}
+
+.menu-editor-row.is-selected {
+  background: var(--vscode-list-activeSelectionBackground);
+  color: var(--vscode-list-activeSelectionForeground);
+}
+
+.menu-editor-row-kind {
+  font-size: 0.75rem;
+  opacity: 0.85;
+}
+
+.menu-editor-row-title {
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.menu-editor-details {
+  display: flex;
+  flex-direction: column;
+  gap: 0.75rem;
+}
+
+.menu-editor-details h3 {
+  margin: 0;
+}
+
+.menu-editor-details label {
+  display: flex;
+  flex-direction: column;
+  gap: 0.35rem;
+}
+
+.menu-editor-picker-backdrop {
+  position: absolute;
+  inset: 0;
+  background: color-mix(in srgb, var(--vscode-editor-background) 75%, black);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.menu-editor-picker {
+  width: min(580px, 90%);
+  max-height: 75%;
+  border: 1px solid var(--vscode-panel-border);
+  background: var(--vscode-editor-background);
+  border-radius: 6px;
+  padding: 0.75rem;
+  display: flex;
+  flex-direction: column;
+  gap: 0.6rem;
+}
+
+.menu-editor-picker-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+}
+
+.menu-editor-picker-header h3 {
+  margin: 0;
+}
+
+.menu-editor-picker-list {
+  display: flex;
+  flex-direction: column;
+  gap: 0.35rem;
+  overflow: auto;
+}
+
+.menu-editor-picker-item {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  width: 100%;
+  border: 1px solid var(--vscode-panel-border);
+  border-radius: 4px;
+  background: var(--vscode-input-background);
+  color: var(--vscode-input-foreground);
+  padding: 0.45rem 0.55rem;
+  text-align: left;
+  cursor: pointer;
+}
+
+.menu-editor-picker-item:hover {
+  border-color: var(--vscode-focusBorder);
+  background: var(--vscode-list-hoverBackground);
+}
+
+.menu-editor-picker-item.is-active {
+  border-color: var(--vscode-focusBorder);
+  background: var(--vscode-list-activeSelectionBackground);
+  color: var(--vscode-list-activeSelectionForeground);
+}
+
+.menu-editor-picker-item.is-active small {
+  color: var(--vscode-list-activeSelectionForeground);
+  opacity: 0.8;
+}
+
+.menu-editor-picker-item small {
+  color: var(--vscode-descriptionForeground);
+}
+
+.menu-editor-picker-state {
+  color: var(--vscode-descriptionForeground);
+}

src/renderer/components/MenuEditorView/MenuEditorView.tsx

@@ -0,0 +1,650 @@
+import React, { useEffect, useMemo, useRef, useState } from 'react';
+import { Tree } from 'react-arborist';
+import { useI18n } from '../../i18n';
+import { showToast } from '../Toast';
+import type { MenuDocument, MenuItemData, MenuItemKind, PostData } from '../../../main/shared/electronApi';
+import { createAutoExpandController } from './menuAutoExpand';
+import {
+  createMenuPageItemFromPost,
+  filterPagePosts,
+  getNextPickerIndex,
+  isPickerCloseKey,
+  isPickerFocusShortcut,
+} from './menuPagePicker';
+import { applyTreeMove } from './menuTreeMove';
+import './MenuEditorView.css';
+
+function createMenuItem(kind: MenuItemKind, title: string): MenuItemData {
+  return {
+    id: `menu-item-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`,
+    title,
+    kind,
+    pageId: undefined,
+    pageSlug: undefined,
+    children: [],
+  };
+}
+
+function findPathById(items: MenuItemData[], id: string, path: number[] = []): number[] | null {
+  for (let index = 0; index < items.length; index += 1) {
+    const item = items[index];
+    const nextPath = [...path, index];
+    if (item.id === id) {
+      return nextPath;
+    }
+
+    const nested = findPathById(item.children, id, nextPath);
+    if (nested) {
+      return nested;
+    }
+  }
+
+  return null;
+}
+
+function updateItemsAtLevel(
+  items: MenuItemData[],
+  path: number[],
+  updater: (level: MenuItemData[]) => MenuItemData[],
+): MenuItemData[] {
+  if (path.length === 0) {
+    return updater(items);
+  }
+
+  const [head, ...tail] = path;
+  return items.map((item, index) => {
+    if (index !== head) {
+      return item;
+    }
+
+    return {
+      ...item,
+      children: updateItemsAtLevel(item.children, tail, updater),
+    };
+  });
+}
+
+function removeItemByPath(items: MenuItemData[], path: number[]): { next: MenuItemData[]; removed: MenuItemData | null } {
+  if (path.length === 0) {
+    return { next: items, removed: null };
+  }
+
+  if (path.length === 1) {
+    const [index] = path;
+    if (index < 0 || index >= items.length) {
+      return { next: items, removed: null };
+    }
+    const removed = items[index];
+    return {
+      next: items.filter((_, currentIndex) => currentIndex !== index),
+      removed,
+    };
+  }
+
+  const [head, ...tail] = path;
+  const current = items[head];
+  if (!current) {
+    return { next: items, removed: null };
+  }
+
+  const nested = removeItemByPath(current.children, tail);
+  if (!nested.removed) {
+    return { next: items, removed: null };
+  }
+
+  const next = items.map((item, index) => (index === head ? { ...item, children: nested.next } : item));
+  return { next, removed: nested.removed };
+}
+
+function insertItemAtPath(items: MenuItemData[], parentPath: number[], index: number, node: MenuItemData): MenuItemData[] {
+  if (parentPath.length === 0) {
+    const boundedIndex = Math.max(0, Math.min(index, items.length));
+    return [...items.slice(0, boundedIndex), node, ...items.slice(boundedIndex)];
+  }
+
+  const [head, ...tail] = parentPath;
+  return items.map((item, currentIndex) => {
+    if (currentIndex !== head) {
+      return item;
+    }
+
+    return {
+      ...item,
+      children: insertItemAtPath(item.children, tail, index, node),
+    };
+  });
+}
+
+function mapItems(items: MenuItemData[], mapper: (item: MenuItemData) => MenuItemData): MenuItemData[] {
+  return items.map((item) => {
+    const mapped = mapper(item);
+    if (mapped.children.length === 0) {
+      return mapped;
+    }
+
+    return {
+      ...mapped,
+      children: mapItems(mapped.children, mapper),
+    };
+  });
+}
+
+export const MenuEditorView: React.FC = () => {
+  const { t: tr } = useI18n();
+  const [items, setItems] = useState<MenuItemData[]>([]);
+  const [selectedId, setSelectedId] = useState<string | null>(null);
+  const [isLoading, setIsLoading] = useState(true);
+  const [isSaving, setIsSaving] = useState(false);
+  const [showPagePicker, setShowPagePicker] = useState(false);
+  const [pagePickerParentId, setPagePickerParentId] = useState<string | null>(null);
+  const [pagePickerLoading, setPagePickerLoading] = useState(false);
+  const [pagePickerQuery, setPagePickerQuery] = useState('');
+  const [pagePickerPosts, setPagePickerPosts] = useState<PostData[]>([]);
+  const [pagePickerActiveIndex, setPagePickerActiveIndex] = useState(-1);
+  const pagePickerInputRef = useRef<HTMLInputElement | null>(null);
+  const autoExpandController = useMemo(() => createAutoExpandController(450), []);
+
+  useEffect(() => {
+    const load = async () => {
+      setIsLoading(true);
+      try {
+        const menu = await window.electronAPI.menu.get();
+        setItems(menu.items);
+        setSelectedId(menu.items[0]?.id ?? null);
+      } catch (error) {
+        console.error('Failed to load menu:', error);
+        showToast.error(tr('menuEditor.loadError'));
+      } finally {
+        setIsLoading(false);
+      }
+    };
+
+    void load();
+  }, [tr]);
+
+  useEffect(() => {
+    return () => {
+      autoExpandController.cancelAll();
+    };
+  }, [autoExpandController]);
+
+  const selectedPath = useMemo(() => {
+    if (!selectedId) {
+      return null;
+    }
+    return findPathById(items, selectedId);
+  }, [items, selectedId]);
+
+  const selectedItem = useMemo(() => {
+    if (!selectedPath || selectedPath.length === 0) {
+      return null;
+    }
+
+    let currentItems = items;
+    let current: MenuItemData | null = null;
+    for (const segment of selectedPath) {
+      current = currentItems[segment] || null;
+      if (!current) {
+        return null;
+      }
+      currentItems = current.children;
+    }
+
+    return current;
+  }, [items, selectedPath]);
+
+  const filteredPagePosts = useMemo(() => {
+    return filterPagePosts(pagePickerPosts, pagePickerQuery);
+  }, [pagePickerPosts, pagePickerQuery]);
+
+  const replaceSelected = (updater: (item: MenuItemData) => MenuItemData): void => {
+    if (!selectedId) {
+      return;
+    }
+
+    setItems((previous) => mapItems(previous, (item) => (item.id === selectedId ? updater(item) : item)));
+  };
+
+  const insertItem = (previous: MenuItemData[], node: MenuItemData, parentId: string | null): MenuItemData[] => {
+    if (!parentId) {
+      return [...previous, node];
+    }
+
+    return mapItems(previous, (item) => {
+      if (item.id !== parentId) {
+        return item;
+      }
+
+      return {
+        ...item,
+        children: [...item.children, node],
+      };
+    });
+  };
+
+  const closePagePicker = (): void => {
+    setShowPagePicker(false);
+    setPagePickerParentId(null);
+    setPagePickerQuery('');
+    setPagePickerActiveIndex(-1);
+  };
+
+  const openPagePicker = async (parentId: string | null): Promise<void> => {
+    setShowPagePicker(true);
+    setPagePickerParentId(parentId);
+    setPagePickerQuery('');
+    setPagePickerActiveIndex(-1);
+    setPagePickerLoading(true);
+    try {
+      const posts = await window.electronAPI.posts.filter({ categories: ['page'] });
+      setPagePickerPosts(posts);
+    } catch (error) {
+      console.error('Failed to load page posts:', error);
+      showToast.error(tr('menuEditor.pagePicker.loadError'));
+      setPagePickerPosts([]);
+    } finally {
+      setPagePickerLoading(false);
+    }
+  };
+
+  const selectPageForMenu = (post: PostData): void => {
+    const node = createMenuPageItemFromPost(post);
+    setItems((previous) => insertItem(previous, node, pagePickerParentId));
+    setSelectedId(node.id);
+    closePagePicker();
+  };
+
+  useEffect(() => {
+    if (!showPagePicker) {
+      return;
+    }
+
+    if (filteredPagePosts.length === 0) {
+      setPagePickerActiveIndex(-1);
+      return;
+    }
+
+    setPagePickerActiveIndex((previous) => {
+      if (previous < 0) {
+        return 0;
+      }
+      return Math.min(previous, filteredPagePosts.length - 1);
+    });
+  }, [filteredPagePosts, showPagePicker]);
+
+  useEffect(() => {
+    if (!showPagePicker) {
+      return;
+    }
+
+    const onWindowKeyDown = (event: KeyboardEvent): void => {
+      if (isPickerFocusShortcut({ key: event.key, metaKey: event.metaKey, ctrlKey: event.ctrlKey })) {
+        event.preventDefault();
+        pagePickerInputRef.current?.focus();
+        pagePickerInputRef.current?.select();
+      }
+    };
+
+    window.addEventListener('keydown', onWindowKeyDown);
+    return () => {
+      window.removeEventListener('keydown', onWindowKeyDown);
+    };
+  }, [showPagePicker]);
+
+  const addRootItem = (kind: MenuItemKind): void => {
+    if (kind === 'page') {
+      void openPagePicker(null);
+      return;
+    }
+
+    const title = kind === 'page' ? tr('menuEditor.newPage') : tr('menuEditor.newSubmenu');
+    const node = createMenuItem(kind, title);
+    setItems((previous) => [...previous, node]);
+    setSelectedId(node.id);
+  };
+
+  const addChildItem = (kind: MenuItemKind): void => {
+    if (!selectedId) {
+      addRootItem(kind);
+      return;
+    }
+
+    if (kind === 'page') {
+      void openPagePicker(selectedId);
+      return;
+    }
+
+    const title = kind === 'page' ? tr('menuEditor.newPage') : tr('menuEditor.newSubmenu');
+    const node = createMenuItem(kind, title);
+
+    setItems((previous) => mapItems(previous, (item) => {
+      if (item.id !== selectedId) {
+        return item;
+      }
+
+      return {
+        ...item,
+        children: [...item.children, node],
+      };
+    }));
+    setSelectedId(node.id);
+  };
+
+  const moveSelected = (direction: 'up' | 'down'): void => {
+    if (!selectedPath || selectedPath.length === 0) {
+      return;
+    }
+
+    const parentPath = selectedPath.slice(0, -1);
+    const index = selectedPath[selectedPath.length - 1];
+    const delta = direction === 'up' ? -1 : 1;
+
+    setItems((previous) => updateItemsAtLevel(previous, parentPath, (level) => {
+      const targetIndex = index + delta;
+      if (targetIndex < 0 || targetIndex >= level.length) {
+        return level;
+      }
+
+      const next = [...level];
+      const [moved] = next.splice(index, 1);
+      next.splice(targetIndex, 0, moved);
+      return next;
+    }));
+  };
+
+  const indentSelected = (): void => {
+    if (!selectedPath || selectedPath.length === 0) {
+      return;
+    }
+
+    const index = selectedPath[selectedPath.length - 1];
+    if (index <= 0) {
+      return;
+    }
+
+    const parentPath = selectedPath.slice(0, -1);
+    setItems((previous) => {
+      const removed = removeItemByPath(previous, selectedPath);
+      if (!removed.removed) {
+        return previous;
+      }
+
+      const previousSiblingPath = [...parentPath, index - 1];
+      return updateItemsAtLevel(removed.next, previousSiblingPath, (level) => [...level, removed.removed as MenuItemData]);
+    });
+  };
+
+  const unindentSelected = (): void => {
+    if (!selectedPath || selectedPath.length < 2) {
+      return;
+    }
+
+    const parentPath = selectedPath.slice(0, -1);
+    const parentIndex = parentPath[parentPath.length - 1];
+    const grandParentPath = parentPath.slice(0, -1);
+
+    setItems((previous) => {
+      const removed = removeItemByPath(previous, selectedPath);
+      if (!removed.removed) {
+        return previous;
+      }
+
+      return insertItemAtPath(removed.next, grandParentPath, parentIndex + 1, removed.removed);
+    });
+  };
+
+  const deleteSelected = (): void => {
+    if (!selectedPath || selectedPath.length === 0 || !selectedId) {
+      return;
+    }
+
+    setItems((previous) => {
+      const removed = removeItemByPath(previous, selectedPath);
+      return removed.next;
+    });
+    setSelectedId(null);
+  };
+
+  const save = async (): Promise<void> => {
+    setIsSaving(true);
+    try {
+      const payload: MenuDocument = { items };
+      const saved = await window.electronAPI.menu.save(payload);
+      setItems(saved.items);
+      showToast.success(tr('menuEditor.saved'));
+    } catch (error) {
+      console.error('Failed to save menu:', error);
+      showToast.error(tr('menuEditor.saveFailed'));
+    } finally {
+      setIsSaving(false);
+    }
+  };
+
+  return (
+    <div className="menu-editor-view">
+      <div className="menu-editor-header">
+        <div>
+          <h2>{tr('menuEditor.title')}</h2>
+          <p>{tr('menuEditor.description')}</p>
+        </div>
+      </div>
+
+      {isLoading ? (
+        <div className="menu-editor-loading">{tr('menuEditor.loading')}</div>
+      ) : (
+        <div className="menu-editor-main">
+          <div className="menu-editor-tree-wrap">
+            <div className="menu-editor-toolbar" role="toolbar" aria-label={tr('menuEditor.title')}>
+              <button type="button" className="menu-editor-tool" title={tr('menuEditor.addPage')} aria-label={tr('menuEditor.addPage')} onClick={() => addRootItem('page')}>
+                <svg width="14" height="14" viewBox="0 0 16 16" fill="currentColor"><path d="M3 2h6l4 4v8H3V2zm6 1.5V6h2.5L9 3.5zM7 8V6h2v2h2v2H9v2H7v-2H5V8h2z" /></svg>
+              </button>
+              <button type="button" className="menu-editor-tool" title={tr('menuEditor.addSubmenu')} aria-label={tr('menuEditor.addSubmenu')} onClick={() => addRootItem('submenu')}>
+                <svg width="14" height="14" viewBox="0 0 16 16" fill="currentColor"><path d="M2 3h8v2H2V3zm0 4h8v2H2V7zm0 4h8v2H2v-2zm9-8h3v3h-1V4h-2V3zm2 4h1v6h-6v-1h5V7z" /></svg>
+              </button>
+              <button type="button" className="menu-editor-tool" title={tr('menuEditor.addChildPage')} aria-label={tr('menuEditor.addChildPage')} onClick={() => addChildItem('page')}>
+                <svg width="14" height="14" viewBox="0 0 16 16" fill="currentColor"><path d="M2 3h5v2H4v6h3v2H2V3zm6 5V6h2v2h2v2h-2v2H8v-2H6V8h2z" /></svg>
+              </button>
+              <button type="button" className="menu-editor-tool" title={tr('menuEditor.addChildSubmenu')} aria-label={tr('menuEditor.addChildSubmenu')} onClick={() => addChildItem('submenu')}>
+                <svg width="14" height="14" viewBox="0 0 16 16" fill="currentColor"><path d="M2 3h5v2H4v6h3v2H2V3zm5 2h7v2H7V5zm3 3h4v2h-4V8zm0 3h4v2h-4v-2z" /></svg>
+              </button>
+              <button type="button" className="menu-editor-tool" title={tr('menuEditor.moveUp')} aria-label={tr('menuEditor.moveUp')} onClick={() => moveSelected('up')} disabled={!selectedPath}>
+                <svg width="14" height="14" viewBox="0 0 16 16" fill="currentColor"><path d="M8 3l4 4H9v6H7V7H4l4-4z" /></svg>
+              </button>
+              <button type="button" className="menu-editor-tool" title={tr('menuEditor.moveDown')} aria-label={tr('menuEditor.moveDown')} onClick={() => moveSelected('down')} disabled={!selectedPath}>
+                <svg width="14" height="14" viewBox="0 0 16 16" fill="currentColor"><path d="M7 3h2v6h3l-4 4-4-4h3V3z" /></svg>
+              </button>
+              <button type="button" className="menu-editor-tool" title={tr('menuEditor.indent')} aria-label={tr('menuEditor.indent')} onClick={indentSelected} disabled={!selectedPath || selectedPath[selectedPath.length - 1] === 0}>
+                <svg width="14" height="14" viewBox="0 0 16 16" fill="currentColor"><path d="M2 4h8v2H2V4zm0 3h4v2H2V7zm0 3h8v2H2v-2zm6-1 3 2-3 2V9z" /></svg>
+              </button>
+              <button type="button" className="menu-editor-tool" title={tr('menuEditor.unindent')} aria-label={tr('menuEditor.unindent')} onClick={unindentSelected} disabled={!selectedPath || selectedPath.length < 2}>
+                <svg width="14" height="14" viewBox="0 0 16 16" fill="currentColor"><path d="M2 4h8v2H2V4zm0 3h4v2H2V7zm0 3h8v2H2v-2zm3-1-3 2 3 2V9z" /></svg>
+              </button>
+              <button type="button" className="menu-editor-tool" title={tr('menuEditor.delete')} aria-label={tr('menuEditor.delete')} onClick={deleteSelected} disabled={!selectedPath}>
+                <svg width="14" height="14" viewBox="0 0 16 16" fill="currentColor"><path d="M6 2h4l1 1h3v2H2V3h3l1-1zm-1 4h2v6H5V6zm4 0h2v6H9V6z" /></svg>
+              </button>
+              <button type="button" className="menu-editor-tool" title={tr('menuEditor.save')} aria-label={tr('menuEditor.save')} onClick={() => void save()} disabled={isSaving}>
+                <svg width="14" height="14" viewBox="0 0 16 16" fill="currentColor"><path d="M2 2h9l3 3v9H2V2zm2 1v3h6V3H4zm0 9h8V7H4v5z" /></svg>
+              </button>
+            </div>
+
+            {items.length === 0 ? (
+              <div className="menu-editor-empty">{tr('menuEditor.empty')}</div>
+            ) : (
+              <Tree<MenuItemData>
+                data={items}
+                width={720}
+                height={420}
+                rowHeight={30}
+                indent={20}
+                openByDefault
+                disableEdit
+                disableMultiSelection
+                onMove={({ dragIds, parentId, index }) => {
+                  setItems((previous) => applyTreeMove(previous, {
+                    dragIds,
+                    parentId,
+                    index,
+                  }));
+                }}
+                onSelect={(nodes) => {
+                  setSelectedId(nodes[0]?.data.id || null);
+                }}
+              >
+                {({ node, style, tree }) => (
+                  <div
+                    style={style}
+                    className={`menu-editor-row ${selectedId === node.data.id ? 'is-selected' : ''}`}
+                    onClick={() => setSelectedId(node.data.id)}
+                    onMouseEnter={() => {
+                      if (!tree.dragNode || !node.isInternal || node.isOpen) {
+                        autoExpandController.cancel(node.id);
+                        return;
+                      }
+
+                      autoExpandController.schedule(node.id, () => {
+                        node.open();
+                      });
+                    }}
+                    onMouseLeave={() => {
+                      autoExpandController.cancel(node.id);
+                    }}
+                  >
+                    <span className="menu-editor-row-kind">
+                      {node.data.kind === 'page' ? tr('menuEditor.type.page') : tr('menuEditor.type.submenu')}
+                    </span>
+                    <span className="menu-editor-row-title">{node.data.title}</span>
+                  </div>
+                )}
+              </Tree>
+            )}
+          </div>
+
+          <div className="menu-editor-details">
+            <h3>{tr('menuEditor.details')}</h3>
+            {!selectedItem ? (
+              <p>{tr('menuEditor.selectItem')}</p>
+            ) : (
+              <>
+                <label>
+                  <span>{tr('menuEditor.field.title')}</span>
+                  <input
+                    type="text"
+                    value={selectedItem.title}
+                    onChange={(event) => {
+                      const value = event.target.value;
+                      replaceSelected((item) => ({ ...item, title: value }));
+                    }}
+                  />
+                </label>
+
+                <label>
+                  <span>{tr('menuEditor.field.type')}</span>
+                  <select
+                    value={selectedItem.kind}
+                    onChange={(event) => {
+                      const value = event.target.value as MenuItemKind;
+                      replaceSelected((item) => ({ ...item, kind: value }));
+                    }}
+                  >
+                    <option value="page">{tr('menuEditor.type.page')}</option>
+                    <option value="submenu">{tr('menuEditor.type.submenu')}</option>
+                  </select>
+                </label>
+
+                {selectedItem.kind === 'page' && (
+                  <>
+                    <label>
+                      <span>{tr('menuEditor.field.pageSlug')}</span>
+                      <input
+                        type="text"
+                        value={selectedItem.pageSlug || ''}
+                        onChange={(event) => {
+                          const value = event.target.value;
+                          replaceSelected((item) => ({ ...item, pageSlug: value || undefined }));
+                        }}
+                      />
+                    </label>
+
+                    <label>
+                      <span>{tr('menuEditor.field.pageId')}</span>
+                      <input
+                        type="text"
+                        value={selectedItem.pageId || ''}
+                        onChange={(event) => {
+                          const value = event.target.value;
+                          replaceSelected((item) => ({ ...item, pageId: value || undefined }));
+                        }}
+                      />
+                    </label>
+                  </>
+                )}
+              </>
+            )}
+          </div>
+        </div>
+      )}
+
+      {showPagePicker && (
+        <div className="menu-editor-picker-backdrop" onClick={closePagePicker}>
+          <div className="menu-editor-picker" onClick={(event) => event.stopPropagation()}>
+            <div className="menu-editor-picker-header">
+              <h3>{tr('menuEditor.pagePicker.title')}</h3>
+              <button type="button" onClick={closePagePicker}>{tr('common.cancel')}</button>
+            </div>
+
+            <input
+              ref={pagePickerInputRef}
+              type="text"
+              value={pagePickerQuery}
+              onChange={(event) => setPagePickerQuery(event.target.value)}
+              onKeyDown={(event) => {
+                if (isPickerCloseKey(event.key)) {
+                  event.preventDefault();
+                  closePagePicker();
+                  return;
+                }
+
+                if (event.key === 'ArrowDown' || event.key === 'ArrowUp') {
+                  event.preventDefault();
+                  setPagePickerActiveIndex((previous) => getNextPickerIndex(previous, event.key, filteredPagePosts.length));
+                  return;
+                }
+
+                if (event.key === 'Enter' && pagePickerActiveIndex >= 0 && pagePickerActiveIndex < filteredPagePosts.length) {
+                  event.preventDefault();
+                  selectPageForMenu(filteredPagePosts[pagePickerActiveIndex]);
+                }
+              }}
+              placeholder={tr('menuEditor.pagePicker.searchPlaceholder')}
+              autoFocus
+            />
+
+            {pagePickerLoading ? (
+              <div className="menu-editor-picker-state">{tr('menuEditor.pagePicker.loading')}</div>
+            ) : filteredPagePosts.length === 0 ? (
+              <div className="menu-editor-picker-state">{tr('menuEditor.pagePicker.empty')}</div>
+            ) : (
+              <div className="menu-editor-picker-list">
+                {filteredPagePosts.map((post) => (
+                  <button
+                    key={post.id}
+                    type="button"
+                    className={`menu-editor-picker-item ${filteredPagePosts[pagePickerActiveIndex]?.id === post.id ? 'is-active' : ''}`}
+                    onClick={() => selectPageForMenu(post)}
+                    onMouseEnter={() => {
+                      const nextIndex = filteredPagePosts.findIndex((candidate) => candidate.id === post.id);
+                      setPagePickerActiveIndex(nextIndex);
+                    }}
+                  >
+                    <span>{post.title}</span>
+                    <small>/{post.slug}</small>
+                  </button>
+                ))}
+              </div>
+            )}
+          </div>
+        </div>
+      )}
+    </div>
+  );
+};

src/renderer/components/MenuEditorView/menuAutoExpand.ts

@@ -0,0 +1,43 @@
+interface AutoExpandController {
+  schedule: (id: string, callback: () => void) => void;
+  cancel: (id: string) => void;
+  cancelAll: () => void;
+}
+
+export function createAutoExpandController(delayMs: number): AutoExpandController {
+  const timers = new Map<string, ReturnType<typeof setTimeout>>();
+
+  const cancel = (id: string): void => {
+    const timer = timers.get(id);
+    if (!timer) {
+      return;
+    }
+
+    clearTimeout(timer);
+    timers.delete(id);
+  };
+
+  const cancelAll = (): void => {
+    for (const timer of timers.values()) {
+      clearTimeout(timer);
+    }
+    timers.clear();
+  };
+
+  const schedule = (id: string, callback: () => void): void => {
+    cancel(id);
+
+    const timer = setTimeout(() => {
+      timers.delete(id);
+      callback();
+    }, delayMs);
+
+    timers.set(id, timer);
+  };
+
+  return {
+    schedule,
+    cancel,
+    cancelAll,
+  };
+}

src/renderer/components/MenuEditorView/menuPagePicker.ts

@@ -0,0 +1,55 @@
+import type { MenuItemData, PostData } from '../../../main/shared/electronApi';
+
+function createMenuItemId(): string {
+  return `menu-item-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`;
+}
+
+export function filterPagePosts(posts: PostData[], query: string): PostData[] {
+  const normalized = query.trim().toLowerCase();
+
+  return posts.filter((post) => {
+    if (!(post.categories || []).includes('page')) {
+      return false;
+    }
+
+    if (!normalized) {
+      return true;
+    }
+
+    return post.title.toLowerCase().includes(normalized) || post.slug.toLowerCase().includes(normalized);
+  });
+}
+
+export function createMenuPageItemFromPost(post: PostData): MenuItemData {
+  return {
+    id: createMenuItemId(),
+    title: post.title,
+    kind: 'page',
+    pageId: post.id,
+    pageSlug: post.slug,
+    children: [],
+  };
+}
+
+export function getNextPickerIndex(currentIndex: number, key: 'ArrowDown' | 'ArrowUp', total: number): number {
+  if (total <= 0) {
+    return -1;
+  }
+
+  if (key === 'ArrowDown') {
+    const next = currentIndex + 1;
+    return next >= total ? 0 : Math.max(0, next);
+  }
+
+  const next = currentIndex < 0 ? total - 1 : currentIndex - 1;
+  return next < 0 ? total - 1 : next;
+}
+
+export function isPickerCloseKey(key: string): boolean {
+  return key === 'Escape';
+}
+
+export function isPickerFocusShortcut(event: { key: string; metaKey: boolean; ctrlKey: boolean }): boolean {
+  const normalizedKey = event.key.toLowerCase();
+  return normalizedKey === 'k' && (event.metaKey || event.ctrlKey);
+}

src/renderer/components/MenuEditorView/menuTreeMove.ts

@@ -0,0 +1,115 @@
+import type { MenuItemData } from '../../../main/shared/electronApi';
+
+export type MenuTreeItem = MenuItemData;
+
+interface TreeMoveInput {
+  dragIds: string[];
+  parentId: string | null;
+  index: number;
+}
+
+function findPathById(items: MenuTreeItem[], id: string, path: number[] = []): number[] | null {
+  for (let index = 0; index < items.length; index += 1) {
+    const item = items[index];
+    const nextPath = [...path, index];
+    if (item.id === id) {
+      return nextPath;
+    }
+
+    const nested = findPathById(item.children, id, nextPath);
+    if (nested) {
+      return nested;
+    }
+  }
+
+  return null;
+}
+
+function removeItemByPath(items: MenuTreeItem[], path: number[]): { next: MenuTreeItem[]; removed: MenuTreeItem | null } {
+  if (path.length === 0) {
+    return { next: items, removed: null };
+  }
+
+  if (path.length === 1) {
+    const [index] = path;
+    if (index < 0 || index >= items.length) {
+      return { next: items, removed: null };
+    }
+
+    const removed = items[index];
+    return {
+      next: items.filter((_, currentIndex) => currentIndex !== index),
+      removed,
+    };
+  }
+
+  const [head, ...tail] = path;
+  const current = items[head];
+  if (!current) {
+    return { next: items, removed: null };
+  }
+
+  const nested = removeItemByPath(current.children, tail);
+  if (!nested.removed) {
+    return { next: items, removed: null };
+  }
+
+  const next = items.map((item, index) => (index === head ? { ...item, children: nested.next } : item));
+  return { next, removed: nested.removed };
+}
+
+function insertItemsAtPath(items: MenuTreeItem[], parentPath: number[], index: number, nodes: MenuTreeItem[]): MenuTreeItem[] {
+  if (parentPath.length === 0) {
+    const boundedIndex = Math.max(0, Math.min(index, items.length));
+    return [
+      ...items.slice(0, boundedIndex),
+      ...nodes,
+      ...items.slice(boundedIndex),
+    ];
+  }
+
+  const [head, ...tail] = parentPath;
+  return items.map((item, currentIndex) => {
+    if (currentIndex !== head) {
+      return item;
+    }
+
+    return {
+      ...item,
+      children: insertItemsAtPath(item.children, tail, index, nodes),
+    };
+  });
+}
+
+export function applyTreeMove(items: MenuTreeItem[], move: TreeMoveInput): MenuTreeItem[] {
+  if (!move.dragIds.length) {
+    return items;
+  }
+
+  let working = items;
+  const draggedNodes: MenuTreeItem[] = [];
+
+  for (const dragId of move.dragIds) {
+    const path = findPathById(working, dragId);
+    if (!path) {
+      continue;
+    }
+
+    const removed = removeItemByPath(working, path);
+    if (removed.removed) {
+      draggedNodes.push(removed.removed);
+      working = removed.next;
+    }
+  }
+
+  if (!draggedNodes.length) {
+    return items;
+  }
+
+  const parentPath = move.parentId ? findPathById(working, move.parentId) : [];
+  if (move.parentId && !parentPath) {
+    return working;
+  }
+
+  return insertItemsAtPath(working, parentPath || [], move.index, draggedNodes);
+}

src/renderer/components/TabBar/TabBar.tsx

@@ -64,6 +64,10 @@ const getTabTitle = (
     return importDefTitles.get(tab.id) || tr('activity.import');
   }
 
+  if (tab.type === 'menu-editor') {
+    return tr('menuEditor.tabTitle');
+  }
+
   if (tab.type === 'metadata-diff') {
     return tr('app.metadataDiff');
   }
@@ -129,6 +133,12 @@ const getTabIcon = (tab: Tab): React.ReactNode => {
           <path d="M19 9h-4V3H9v6H5l7 7 7-7zM5 18v2h14v-2H5z"/>
         </svg>
       );
+    case 'menu-editor':
+      return (
+        <svg width="16" height="16" viewBox="0 0 16 16" fill="currentColor">
+          <path d="M2 3h12v1H2V3zm0 3h12v1H2V6zm0 3h8v1H2V9zm0 3h8v1H2v-1zm10-2 2 2-2 2v-1H9v-2h3V10z"/>
+        </svg>
+      );
     case 'metadata-diff':
       return (
         <svg width="16" height="16" viewBox="0 0 16 16" fill="currentColor">