diff --git a/src/main/engine/MediaEngine.ts b/src/main/engine/MediaEngine.ts
index c709d06..0a213ae 100644
--- a/src/main/engine/MediaEngine.ts
+++ b/src/main/engine/MediaEngine.ts
@@ -960,7 +960,8 @@ export class MediaEngine extends EventEmitter {
     const dbMedia = await db.select().from(media).where(eq(media.id, id)).get();
     if (!dbMedia?.filePath) return null;
     const dataDir = this.getDataDir();
-    return path.relative(dataDir, dbMedia.filePath);
+    const relativePath = path.relative(dataDir, dbMedia.filePath);
+    return relativePath.replace(/\\/g, '/');
   }
 
   async rebuildDatabaseFromFiles(): Promise<void> {
diff --git a/src/main/ipc/handlers.ts b/src/main/ipc/handlers.ts
index f67c7fb..62886da 100644
--- a/src/main/ipc/handlers.ts
+++ b/src/main/ipc/handlers.ts
@@ -1,4 +1,4 @@
-import { ipcMain, dialog, shell } from 'electron';
+import { app, ipcMain, dialog, shell } from 'electron';
 import * as path from 'path';
 import * as fsPromises from 'fs/promises';
 import { eq } from 'drizzle-orm';
@@ -12,6 +12,7 @@ import { getGitEngine } from '../engine/GitEngine';
 import { taskManager, TaskProgress } from '../engine/TaskManager';
 import { getDatabase } from '../database';
 import { media } from '../database/schema';
+import { APP_MENU_ACTION_EVENT_MAP, APP_MENU_WEB_CONTENTS_ACTIONS, type AppMenuAction } from '../shared/menuCommands';
 
 /**
  * Wrap an IPC handler so that "Database is closing" errors during shutdown
@@ -46,6 +47,45 @@ function resolvePostCreatedAt(post: { createdAt: Date | string }): Date {
   return Number.isNaN(parsed.getTime()) ? new Date() : parsed;
 }
 
+function runWebContentsMenuAction(sender: any, action: AppMenuAction): boolean {
+  if (!sender) {
+    return false;
+  }
+
+  if (!APP_MENU_WEB_CONTENTS_ACTIONS.has(action)) {
+    return false;
+  }
+
+  switch (action) {
+    case 'undo':
+      sender.undo?.();
+      return true;
+    case 'redo':
+      sender.redo?.();
+      return true;
+    case 'cut':
+      sender.cut?.();
+      return true;
+    case 'copy':
+      sender.copy?.();
+      return true;
+    case 'paste':
+      sender.paste?.();
+      return true;
+    case 'delete':
+      sender.delete?.();
+      return true;
+    case 'selectAll':
+      sender.selectAll?.();
+      return true;
+    case 'toggleDevTools':
+      sender.toggleDevTools?.();
+      return true;
+    default:
+      return false;
+  }
+}
+
 export function registerIpcHandlers(): void {
   // ============ Git Handlers ============
 
@@ -673,6 +713,36 @@ export function registerIpcHandlers(): void {
     }
   });
 
+  safeHandle('app:triggerMenuAction', async (event, action: string) => {
+    const typedAction = action as AppMenuAction;
+
+    if (typedAction === 'quit') {
+      app.quit();
+      return;
+    }
+
+    if (typedAction === 'viewOnGitHub') {
+      await shell.openExternal('https://github.com/rfc1437/bDS');
+      return;
+    }
+
+    if (typedAction === 'reportIssue') {
+      await shell.openExternal('https://github.com/rfc1437/bDS/issues');
+      return;
+    }
+
+    const handledByWebContents = runWebContentsMenuAction((event as any)?.sender, typedAction);
+    if (handledByWebContents) {
+      return;
+    }
+
+    const channel = APP_MENU_ACTION_EVENT_MAP[typedAction];
+    if (!channel) {
+      return;
+    }
+    event.sender.send(channel);
+  });
+
   // ============ Meta Handlers ============
 
   safeHandle('meta:getTags', async () => {
diff --git a/src/main/main.ts b/src/main/main.ts
index e326b9e..f5dd29e 100644
--- a/src/main/main.ts
+++ b/src/main/main.ts
@@ -8,6 +8,7 @@ import { eq } from 'drizzle-orm';
 import { getMediaEngine } from './engine/MediaEngine';
 import { getPostEngine } from './engine/PostEngine';
 import { PreviewServer } from './engine/PreviewServer';
+import { APP_MENU_ACTION_EVENT_MAP, APP_MENU_GROUPS, type AppMenuAction, type AppMenuItemDefinition } from './shared/menuCommands';
 
 let mainWindow: BrowserWindow | null = null;
 let previewServer: PreviewServer | null = null;
@@ -41,6 +42,7 @@ protocol.registerSchemesAsPrivileged([
 ]);
 
 function createWindow(): void {
+  const isMac = process.platform === 'darwin';
   mainWindow = new BrowserWindow({
     width: 1400,
     height: 900,
@@ -48,7 +50,17 @@ function createWindow(): void {
     minHeight: 600,
     title: 'Blogging Desktop Server',
     backgroundColor: '#1e1e1e', // VS Code dark background
-    titleBarStyle: process.platform === 'darwin' ? 'hiddenInset' : 'default',
+    titleBarStyle: isMac ? 'hiddenInset' : 'hidden',
+    ...(isMac
+      ? {}
+      : {
+          titleBarOverlay: {
+            color: '#252526',
+            symbolColor: '#cccccc',
+            height: 34,
+          },
+          autoHideMenuBar: false,
+        }),
     webPreferences: {
       preload: path.join(__dirname, 'preload.js'),
       nodeIntegration: false,
@@ -158,32 +170,82 @@ async function startPreviewServerOnAppStart(): Promise<void> {
 }
 
 function createApplicationMenu(): Menu {
+  const commandDefinitions = APP_MENU_GROUPS
+    .flatMap(group => group.items)
+    .filter(item => !item.separator)
+    .reduce<Record<string, AppMenuItemDefinition>>((acc, item) => {
+      acc[item.action] = item;
+      return acc;
+    }, {});
+
+  const triggerMenuAction = (action: AppMenuAction): void => {
+    if (action === 'quit') {
+      app.quit();
+      return;
+    }
+
+    if (action === 'viewOnGitHub') {
+      void shell.openExternal('https://github.com/rfc1437/bDS');
+      return;
+    }
+
+    if (action === 'reportIssue') {
+      void shell.openExternal('https://github.com/rfc1437/bDS/issues');
+      return;
+    }
+
+    const channel = APP_MENU_ACTION_EVENT_MAP[action];
+    if (channel) {
+      mainWindow?.webContents.send(channel);
+    }
+  };
+
+  const buildSharedMenuItem = (action: AppMenuAction): MenuItemConstructorOptions => {
+    const definition = commandDefinitions[action];
+    if (!definition) {
+      throw new Error(`Unknown shared menu action: ${action}`);
+    }
+
+    if (definition.role) {
+      return {
+        label: definition.label,
+        role: definition.role,
+        accelerator: definition.accelerator,
+      };
+    }
+
+    return {
+      label: definition.label,
+      accelerator: definition.accelerator,
+      click: () => {
+        triggerMenuAction(action);
+      },
+    };
+  };
+
+  const buildSharedGroupMenuItems = (groupLabel: string): MenuItemConstructorOptions[] => {
+    const group = APP_MENU_GROUPS.find(item => item.label === groupLabel);
+    if (!group) {
+      return [];
+    }
+
+    return group.items.map((item) => {
+      if (item.separator) {
+        return { type: 'separator' };
+      }
+
+      return buildSharedMenuItem(item.action as AppMenuAction);
+    });
+  };
+
   const template: MenuItemConstructorOptions[] = [
     {
       label: 'File',
       submenu: [
-        {
-          label: 'New Post',
-          accelerator: 'CmdOrCtrl+N',
-          click: () => {
-            mainWindow?.webContents.send('menu:newPost');
-          },
-        },
-        {
-          label: 'Import Media...',
-          accelerator: 'CmdOrCtrl+I',
-          click: () => {
-            mainWindow?.webContents.send('menu:importMedia');
-          },
-        },
+        buildSharedMenuItem('newPost'),
+        buildSharedMenuItem('importMedia'),
         { type: 'separator' },
-        {
-          label: 'Save',
-          accelerator: 'CmdOrCtrl+S',
-          click: () => {
-            mainWindow?.webContents.send('menu:save');
-          },
-        },
+        buildSharedMenuItem('save'),
         { type: 'separator' },
         {
           label: 'Open in Browser',
@@ -204,76 +266,17 @@ function createApplicationMenu(): Menu {
           },
         },
         { type: 'separator' },
-        {
-          label: 'Exit',
-          accelerator: process.platform === 'darwin' ? 'Cmd+Q' : 'Alt+F4',
-          click: () => {
-            app.quit();
-          },
-        },
+        buildSharedMenuItem('quit'),
       ],
     },
     {
       label: 'Edit',
-      submenu: [
-        { role: 'undo' },
-        { role: 'redo' },
-        { type: 'separator' },
-        { role: 'cut' },
-        { role: 'copy' },
-        { role: 'paste' },
-        { role: 'delete' },
-        { type: 'separator' },
-        { role: 'selectAll' },
-        { type: 'separator' },
-        {
-          label: 'Find',
-          accelerator: 'CmdOrCtrl+F',
-          click: () => {
-            mainWindow?.webContents.send('menu:find');
-          },
-        },
-        {
-          label: 'Replace',
-          accelerator: 'CmdOrCtrl+H',
-          click: () => {
-            mainWindow?.webContents.send('menu:replace');
-          },
-        },
-      ],
+      submenu: buildSharedGroupMenuItems('Edit'),
     },
     {
       label: 'View',
       submenu: [
-        {
-          label: 'Posts',
-          accelerator: 'CmdOrCtrl+1',
-          click: () => {
-            mainWindow?.webContents.send('menu:viewPosts');
-          },
-        },
-        {
-          label: 'Media',
-          accelerator: 'CmdOrCtrl+2',
-          click: () => {
-            mainWindow?.webContents.send('menu:viewMedia');
-          },
-        },
-        { type: 'separator' },
-        {
-          label: 'Toggle Sidebar',
-          accelerator: 'CmdOrCtrl+B',
-          click: () => {
-            mainWindow?.webContents.send('menu:toggleSidebar');
-          },
-        },
-        {
-          label: 'Toggle Panel',
-          accelerator: 'CmdOrCtrl+J',
-          click: () => {
-            mainWindow?.webContents.send('menu:togglePanel');
-          },
-        },
+        ...buildSharedGroupMenuItems('View'),
         { type: 'separator' },
         { role: 'reload' },
         { role: 'forceReload' },
@@ -295,13 +298,7 @@ function createApplicationMenu(): Menu {
     {
       label: 'Blog',
       submenu: [
-        {
-          label: 'Publish Selected',
-          accelerator: 'CmdOrCtrl+Shift+P',
-          click: () => {
-            mainWindow?.webContents.send('menu:publishSelected');
-          },
-        },
+        buildSharedMenuItem('publishSelected'),
         { type: 'separator' },
         {
           label: 'Preview Post',
@@ -317,50 +314,15 @@ function createApplicationMenu(): Menu {
           },
         },
         { type: 'separator' },
-        {
-          label: 'Rebuild Database from Files',
-          click: () => {
-            mainWindow?.webContents.send('menu:rebuildDatabase');
-          },
-        },
-        {
-          label: 'Reindex Search Text',
-          click: () => {
-            mainWindow?.webContents.send('menu:reindexText');
-          },
-        },
+        buildSharedMenuItem('rebuildDatabase'),
+        buildSharedMenuItem('reindexText'),
         { type: 'separator' },
-        {
-          label: 'Metadata Diff Tool',
-          click: () => {
-            mainWindow?.webContents.send('menu:metadataDiff');
-          },
-        },
+        buildSharedMenuItem('metadataDiff'),
       ],
     },
     {
       label: 'Help',
-      submenu: [
-        {
-          label: 'About Blogging Desktop Server',
-          click: () => {
-            mainWindow?.webContents.send('menu:about');
-          },
-        },
-        { type: 'separator' },
-        {
-          label: 'View on GitHub',
-          click: async () => {
-            await shell.openExternal('https://github.com/rfc1437/bDS');
-          },
-        },
-        {
-          label: 'Report Issue',
-          click: async () => {
-            await shell.openExternal('https://github.com/rfc1437/bDS/issues');
-          },
-        },
-      ],
+      submenu: buildSharedGroupMenuItems('Help'),
     },
   ];
 
diff --git a/src/main/preload.ts b/src/main/preload.ts
index 16dd948..c671082 100644
--- a/src/main/preload.ts
+++ b/src/main/preload.ts
@@ -142,6 +142,7 @@ export const electronAPI: ElectronAPI = {
     getDefaultProjectPath: (projectId: string) => ipcRenderer.invoke('app:getDefaultProjectPath', projectId),
     readProjectMetadata: (folderPath: string) => ipcRenderer.invoke('app:readProjectMetadata', folderPath),
     setPreviewPostTarget: (postId: string | null) => ipcRenderer.invoke('app:setPreviewPostTarget', postId),
+    triggerMenuAction: (action: string) => ipcRenderer.invoke('app:triggerMenuAction', action),
   },
 
   // Meta (tags, categories, and project metadata)
diff --git a/src/main/shared/electronApi.ts b/src/main/shared/electronApi.ts
index 5f1fe37..e505cbb 100644
--- a/src/main/shared/electronApi.ts
+++ b/src/main/shared/electronApi.ts
@@ -510,6 +510,7 @@ export interface ElectronAPI {
     getDefaultProjectPath: (projectId: string) => Promise<string>;
     readProjectMetadata: (folderPath: string) => Promise<{ name?: string; description?: string; mainLanguage?: string } | null>;
     setPreviewPostTarget: (postId: string | null) => Promise<void>;
+    triggerMenuAction: (action: string) => Promise<void>;
   };
   meta: {
     getTags: () => Promise<string[]>;
diff --git a/src/main/shared/menuCommands.ts b/src/main/shared/menuCommands.ts
new file mode 100644
index 0000000..ec05d22
--- /dev/null
+++ b/src/main/shared/menuCommands.ts
@@ -0,0 +1,128 @@
+export type AppMenuAction =
+  | 'newPost'
+  | 'importMedia'
+  | 'save'
+  | 'quit'
+  | 'undo'
+  | 'redo'
+  | 'cut'
+  | 'copy'
+  | 'paste'
+  | 'delete'
+  | 'selectAll'
+  | 'find'
+  | 'replace'
+  | 'viewPosts'
+  | 'viewMedia'
+  | 'toggleSidebar'
+  | 'togglePanel'
+  | 'toggleDevTools'
+  | 'publishSelected'
+  | 'rebuildDatabase'
+  | 'reindexText'
+  | 'metadataDiff'
+  | 'about'
+  | 'viewOnGitHub'
+  | 'reportIssue';
+
+export type AppMenuRole = 'undo' | 'redo' | 'cut' | 'copy' | 'paste' | 'delete' | 'selectAll';
+
+export interface AppMenuItemDefinition {
+  label: string;
+  action: AppMenuAction | `${string}-separator-${number}`;
+  accelerator?: string;
+  separator?: boolean;
+  role?: AppMenuRole;
+}
+
+export interface AppMenuGroupDefinition {
+  label: 'File' | 'Edit' | 'View' | 'Blog' | 'Help';
+  items: AppMenuItemDefinition[];
+}
+
+export const APP_MENU_GROUPS: AppMenuGroupDefinition[] = [
+  {
+    label: 'File',
+    items: [
+      { label: 'New Post', action: 'newPost', accelerator: 'CmdOrCtrl+N' },
+      { label: 'Import Media...', action: 'importMedia', accelerator: 'CmdOrCtrl+I' },
+      { label: 'Save', action: 'save', accelerator: 'CmdOrCtrl+S' },
+      { label: '', action: 'file-separator-1', separator: true },
+      { label: 'Quit', action: 'quit', accelerator: 'CmdOrCtrl+Q' },
+    ],
+  },
+  {
+    label: 'Edit',
+    items: [
+      { label: 'Undo', action: 'undo', accelerator: 'CmdOrCtrl+Z', role: 'undo' },
+      { label: 'Redo', action: 'redo', accelerator: 'CmdOrCtrl+Y', role: 'redo' },
+      { label: '', action: 'edit-separator-1', separator: true },
+      { label: 'Cut', action: 'cut', accelerator: 'CmdOrCtrl+X', role: 'cut' },
+      { label: 'Copy', action: 'copy', accelerator: 'CmdOrCtrl+C', role: 'copy' },
+      { label: 'Paste', action: 'paste', accelerator: 'CmdOrCtrl+V', role: 'paste' },
+      { label: 'Delete', action: 'delete', role: 'delete' },
+      { label: '', action: 'edit-separator-2', separator: true },
+      { label: 'Select All', action: 'selectAll', accelerator: 'CmdOrCtrl+A', role: 'selectAll' },
+      { label: '', action: 'edit-separator-3', separator: true },
+      { label: 'Find', action: 'find', accelerator: 'CmdOrCtrl+F' },
+      { label: 'Replace', action: 'replace', accelerator: 'CmdOrCtrl+H' },
+    ],
+  },
+  {
+    label: 'View',
+    items: [
+      { label: 'Posts', action: 'viewPosts', accelerator: 'CmdOrCtrl+1' },
+      { label: 'Media', action: 'viewMedia', accelerator: 'CmdOrCtrl+2' },
+      { label: 'Toggle Sidebar', action: 'toggleSidebar', accelerator: 'CmdOrCtrl+B' },
+      { label: 'Toggle Panel', action: 'togglePanel', accelerator: 'CmdOrCtrl+J' },
+      { label: 'Toggle Developer Tools', action: 'toggleDevTools', accelerator: 'CmdOrCtrl+Shift+I' },
+    ],
+  },
+  {
+    label: 'Blog',
+    items: [
+      { label: 'Publish Selected', action: 'publishSelected', accelerator: 'CmdOrCtrl+Shift+P' },
+      { label: 'Rebuild Database from Files', action: 'rebuildDatabase' },
+      { label: 'Reindex Search Text', action: 'reindexText' },
+      { label: 'Metadata Diff Tool', action: 'metadataDiff' },
+    ],
+  },
+  {
+    label: 'Help',
+    items: [
+      { label: 'About Blogging Desktop Server', action: 'about' },
+      { label: '', action: 'help-separator-1', separator: true },
+      { label: 'View on GitHub', action: 'viewOnGitHub' },
+      { label: 'Report Issue', action: 'reportIssue' },
+    ],
+  },
+];
+
+export const APP_MENU_ACTION_EVENT_MAP: Partial<Record<AppMenuAction, string>> = {
+  newPost: 'menu:newPost',
+  importMedia: 'menu:importMedia',
+  save: 'menu:save',
+  find: 'menu:find',
+  replace: 'menu:replace',
+  viewPosts: 'menu:viewPosts',
+  viewMedia: 'menu:viewMedia',
+  toggleSidebar: 'menu:toggleSidebar',
+  togglePanel: 'menu:togglePanel',
+  toggleDevTools: 'menu:toggleDevTools',
+  publishSelected: 'menu:publishSelected',
+  rebuildDatabase: 'menu:rebuildDatabase',
+  reindexText: 'menu:reindexText',
+  metadataDiff: 'menu:metadataDiff',
+  about: 'menu:about',
+};
+
+export const APP_MENU_WEB_CONTENTS_ACTIONS: ReadonlySet<AppMenuAction> = new Set([
+  'undo',
+  'redo',
+  'cut',
+  'copy',
+  'paste',
+  'delete',
+  'selectAll',
+  'toggleDevTools',
+]);
diff --git a/src/renderer/components/TabBar/TabBar.tsx b/src/renderer/components/TabBar/TabBar.tsx
index e1663af..a34504c 100644
--- a/src/renderer/components/TabBar/TabBar.tsx
+++ b/src/renderer/components/TabBar/TabBar.tsx
@@ -472,6 +472,10 @@ export const TabBar: React.FC = () => {
     }
   };
 
+  if (tabs.length === 0) {
+    return null;
+  }
+
   return (
     <div className="tab-bar">
       {showLeftArrow && (
diff --git a/src/renderer/components/WindowTitleBar/WindowTitleBar.css b/src/renderer/components/WindowTitleBar/WindowTitleBar.css
index 34f4ed5..a855078 100644
--- a/src/renderer/components/WindowTitleBar/WindowTitleBar.css
+++ b/src/renderer/components/WindowTitleBar/WindowTitleBar.css
@@ -1,4 +1,5 @@
 .window-titlebar {
+  position: relative;
   height: 34px;
   display: flex;
   align-items: center;
@@ -6,8 +7,105 @@
   background-color: var(--vscode-editorGroupHeader-tabsBackground, #252526);
   border-bottom: 1px solid var(--vscode-editorGroupHeader-tabsBorder, #1e1e1e);
   flex-shrink: 0;
+  app-region: drag;
   -webkit-app-region: drag;
-  padding-right: 10px;
+  padding-right: calc(10px + var(--bds-titlebar-overlay-right, 0px));
+}
+
+.window-titlebar-menu-bar {
+  display: flex;
+  align-items: center;
+  height: 100%;
+  margin-left: 6px;
+  gap: 2px;
+  app-region: no-drag;
+  -webkit-app-region: no-drag;
+  z-index: 2;
+}
+
+.window-titlebar-menu-button {
+  height: 24px;
+  border: none;
+  background: transparent;
+  color: var(--vscode-titleBar-activeForeground, var(--vscode-foreground, #cccccc));
+  padding: 0 8px;
+  border-radius: 4px;
+  font-size: 12px;
+  line-height: 1;
+  cursor: pointer;
+}
+
+.window-titlebar-menu-button:focus,
+.window-titlebar-menu-button:focus-visible {
+  outline: none;
+  box-shadow: none;
+}
+
+.window-titlebar-menu-button:hover,
+.window-titlebar-menu-button.is-active {
+  background-color: var(--vscode-toolbar-hoverBackground, rgba(90, 93, 94, 0.31));
+}
+
+.window-titlebar-menu-mnemonic {
+  text-decoration: underline;
+  text-underline-offset: 2px;
+}
+
+.window-titlebar-menu-dropdown {
+  position: absolute;
+  top: 30px;
+  min-width: 210px;
+  padding: 6px;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+  background-color: var(--vscode-menu-background, #252526);
+  border: 1px solid var(--vscode-menu-border, #454545);
+  border-radius: 6px;
+  box-shadow: var(--vscode-widget-shadow, 0 8px 24px rgba(0, 0, 0, 0.4));
+  app-region: no-drag;
+  -webkit-app-region: no-drag;
+  z-index: 10;
+}
+
+.window-titlebar-menu-item {
+  border: none;
+  background: transparent;
+  color: var(--vscode-menu-foreground, var(--vscode-foreground, #cccccc));
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 16px;
+  text-align: left;
+  border-radius: 4px;
+  padding: 6px 8px;
+  font-size: 12px;
+  cursor: pointer;
+}
+
+.window-titlebar-menu-item:focus,
+.window-titlebar-menu-item:focus-visible {
+  outline: none;
+  box-shadow: none;
+  background-color: var(--vscode-toolbar-hoverBackground, rgba(90, 93, 94, 0.31));
+}
+
+.window-titlebar-menu-item:hover {
+  background-color: var(--vscode-menu-selectionBackground, rgba(9, 71, 113, 0.45));
+}
+
+.window-titlebar-menu-item.is-keyboard-active {
+  background-color: var(--vscode-menu-selectionBackground, rgba(9, 71, 113, 0.45));
+}
+
+.window-titlebar-menu-item-accelerator {
+  opacity: 0.8;
+}
+
+.window-titlebar-menu-separator {
+  height: 1px;
+  margin: 4px 2px;
+  background-color: var(--vscode-menu-separatorBackground, rgba(255, 255, 255, 0.08));
 }
 
 .window-titlebar-drag-region {
@@ -15,6 +113,25 @@
   height: 100%;
 }
 
+.window-titlebar-title {
+  position: absolute;
+  left: 50%;
+  transform: translateX(-50%);
+  max-width: 45%;
+  height: 100%;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  color: var(--vscode-titleBar-activeForeground, var(--vscode-foreground, #cccccc));
+  font-size: 12px;
+  font-weight: 500;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  user-select: none;
+  pointer-events: none;
+}
+
 .window-titlebar-actions {
   height: 100%;
   display: flex;
@@ -35,6 +152,7 @@
   color: var(--vscode-foreground, #cccccc);
   cursor: pointer;
   border-radius: 4px;
+  app-region: no-drag;
   -webkit-app-region: no-drag;
 }
 
@@ -63,6 +181,25 @@
   background-color: currentColor;
 }
 
+.window-titlebar-panel-icon {
+  width: 14px;
+  height: 14px;
+  border: 1.5px solid currentColor;
+  border-radius: 2px;
+  display: block;
+  position: relative;
+  overflow: hidden;
+}
+
+.window-titlebar-panel-pane {
+  position: absolute;
+  left: 0;
+  bottom: 0;
+  width: 100%;
+  height: 33.3333%;
+  background-color: currentColor;
+}
+
 .window-titlebar-action-button:hover {
   background-color: var(--vscode-toolbar-hoverBackground, rgba(90, 93, 94, 0.31));
 }
diff --git a/src/renderer/components/WindowTitleBar/WindowTitleBar.tsx b/src/renderer/components/WindowTitleBar/WindowTitleBar.tsx
index 3f3f8a5..bbe21a1 100644
--- a/src/renderer/components/WindowTitleBar/WindowTitleBar.tsx
+++ b/src/renderer/components/WindowTitleBar/WindowTitleBar.tsx
@@ -1,13 +1,410 @@
-import React from 'react';
+import React, { useEffect, useMemo, useRef, useState } from 'react';
 import { useAppStore } from '../../store';
+import { APP_MENU_GROUPS } from '../../../main/shared/menuCommands';
 import './WindowTitleBar.css';
 
+type WindowControlsOverlayLike = {
+  visible: boolean;
+  getTitlebarAreaRect: () => DOMRect;
+  addEventListener: (type: 'geometrychange', listener: EventListener) => void;
+  removeEventListener: (type: 'geometrychange', listener: EventListener) => void;
+};
+
 export const WindowTitleBar: React.FC = () => {
-  const { sidebarVisible, toggleSidebar } = useAppStore();
+  const { sidebarVisible, panelVisible, toggleSidebar, togglePanel } = useAppStore();
+  const [windowTitle, setWindowTitle] = useState<string>(document.title || 'Blogging Desktop Server');
+  const [openMenu, setOpenMenu] = useState<{ label: string; left: number } | null>(null);
+  const [showMnemonics, setShowMnemonics] = useState<boolean>(false);
+  const [keyboardMenuItemIndex, setKeyboardMenuItemIndex] = useState<number | null>(null);
+  const menuRootRef = useRef<HTMLDivElement | null>(null);
+  const menuButtonRefs = useRef<Record<string, HTMLButtonElement | null>>({});
+  const isMac = navigator.platform.toLowerCase().includes('mac');
+  const isDevMode = (window as Window & { __BDS_IS_DEV__?: boolean }).__BDS_IS_DEV__
+    ?? (typeof import.meta !== 'undefined' && Boolean(import.meta.env?.DEV));
+
+  const visibleMenuGroups = APP_MENU_GROUPS.map((group) => {
+    if (group.label !== 'View') {
+      return group;
+    }
+
+    return {
+      ...group,
+      items: group.items.filter(item => isDevMode || item.action !== 'toggleDevTools'),
+    };
+  });
+
+  const mnemonicByKey = useMemo(() => {
+    return visibleMenuGroups.reduce<Record<string, string>>((acc, group) => {
+      const mnemonicKey = group.label.charAt(0).toLowerCase();
+      acc[mnemonicKey] = group.label;
+      return acc;
+    }, {});
+  }, [visibleMenuGroups]);
+
+  const getMenuLeft = (label: string): number | null => {
+    const button = menuButtonRefs.current[label];
+    if (!button) {
+      return null;
+    }
+
+    const buttonRect = button.getBoundingClientRect();
+    const rootRect = menuRootRef.current?.getBoundingClientRect();
+    return rootRect ? buttonRect.left - rootRect.left : buttonRect.left;
+  };
+
+  const openMenuByLabel = (label: string) => {
+    const left = getMenuLeft(label);
+    if (left === null) {
+      return;
+    }
+    setKeyboardMenuItemIndex(null);
+    setOpenMenu({ label, left });
+  };
+
+  const getMenuActionableItems = (label: string) => {
+    const group = visibleMenuGroups.find(item => item.label === label);
+    if (!group) {
+      return [];
+    }
+
+    return group.items.filter(item => !item.separator);
+  };
+
+  const switchOpenMenuByOffset = (offset: number) => {
+    if (!openMenu) {
+      return;
+    }
+
+    const currentIndex = visibleMenuGroups.findIndex(group => group.label === openMenu.label);
+    if (currentIndex < 0) {
+      return;
+    }
+
+    const nextIndex = (currentIndex + offset + visibleMenuGroups.length) % visibleMenuGroups.length;
+    openMenuByLabel(visibleMenuGroups[nextIndex].label);
+  };
+
+  useEffect(() => {
+    const rootStyle = document.documentElement.style;
+    const setInsets = (left: number, right: number) => {
+      rootStyle.setProperty('--bds-titlebar-overlay-left', `${left}px`);
+      rootStyle.setProperty('--bds-titlebar-overlay-right', `${right}px`);
+    };
+
+    const overlay = (navigator as Navigator & { windowControlsOverlay?: WindowControlsOverlayLike }).windowControlsOverlay;
+    if (!overlay) {
+      setInsets(0, 0);
+      return;
+    }
+
+    const syncOverlayInsets = () => {
+      if (!overlay.visible) {
+        setInsets(0, 0);
+        return;
+      }
+
+      const titlebarRect = overlay.getTitlebarAreaRect();
+      const viewportWidth = window.innerWidth || document.documentElement.clientWidth || titlebarRect.right;
+
+      const leftInset = Math.max(0, Math.round(titlebarRect.left));
+      const rightInset = Math.max(0, Math.round(viewportWidth - titlebarRect.right));
+      setInsets(leftInset, rightInset);
+    };
+
+    const onGeometryChange: EventListener = () => {
+      syncOverlayInsets();
+    };
+    const onResize = () => {
+      syncOverlayInsets();
+    };
+
+    syncOverlayInsets();
+    overlay.addEventListener('geometrychange', onGeometryChange);
+    const canListenToResize = typeof window.addEventListener === 'function';
+    if (canListenToResize) {
+      window.addEventListener('resize', onResize);
+    }
+
+    return () => {
+      overlay.removeEventListener('geometrychange', onGeometryChange);
+      if (canListenToResize && typeof window.removeEventListener === 'function') {
+        window.removeEventListener('resize', onResize);
+      }
+    };
+  }, []);
+
+  useEffect(() => {
+    const updateTitle = () => {
+      setWindowTitle(document.title || 'Blogging Desktop Server');
+    };
+
+    updateTitle();
+
+    const titleElement = document.querySelector('title');
+    if (!titleElement) {
+      return;
+    }
+
+    const observer = new MutationObserver(() => {
+      updateTitle();
+    });
+    observer.observe(titleElement, { childList: true });
+
+    return () => {
+      observer.disconnect();
+    };
+  }, []);
+
+  useEffect(() => {
+    if (!openMenu) {
+      return;
+    }
+
+    const onDocumentMouseDown = (event: MouseEvent) => {
+      const target = event.target as Node;
+      if (menuRootRef.current && !menuRootRef.current.contains(target)) {
+        setOpenMenu(null);
+        setShowMnemonics(false);
+      }
+    };
+
+    const onEscape = (event: KeyboardEvent) => {
+      if (event.key === 'Escape') {
+        setOpenMenu(null);
+        setKeyboardMenuItemIndex(null);
+        setShowMnemonics(false);
+        return;
+      }
+
+      if (event.key === 'ArrowRight') {
+        event.preventDefault();
+        switchOpenMenuByOffset(1);
+        return;
+      }
+
+      if (event.key === 'ArrowLeft') {
+        event.preventDefault();
+        switchOpenMenuByOffset(-1);
+        return;
+      }
+
+      if (!openMenu) {
+        return;
+      }
+
+      const actionableItems = getMenuActionableItems(openMenu.label);
+      if (actionableItems.length === 0) {
+        return;
+      }
+
+      if (event.key === 'ArrowDown') {
+        event.preventDefault();
+        setKeyboardMenuItemIndex((previous) => {
+          if (previous === null) {
+            return 0;
+          }
+          return (previous + 1) % actionableItems.length;
+        });
+        return;
+      }
+
+      if (event.key === 'ArrowUp') {
+        event.preventDefault();
+        setKeyboardMenuItemIndex((previous) => {
+          if (previous === null) {
+            return actionableItems.length - 1;
+          }
+          return (previous - 1 + actionableItems.length) % actionableItems.length;
+        });
+        return;
+      }
+
+      if ((event.key === 'Enter' || event.key === ' ') && keyboardMenuItemIndex !== null) {
+        event.preventDefault();
+        const targetItem = actionableItems[keyboardMenuItemIndex];
+        if (targetItem) {
+          void window.electronAPI?.app?.triggerMenuAction?.(targetItem.action);
+          setOpenMenu(null);
+          setKeyboardMenuItemIndex(null);
+          setShowMnemonics(false);
+        }
+        return;
+      }
+
+      if (event.key === 'Home') {
+        event.preventDefault();
+        setKeyboardMenuItemIndex(0);
+        return;
+      }
+
+      if (event.key === 'End') {
+        event.preventDefault();
+        setKeyboardMenuItemIndex(actionableItems.length - 1);
+        return;
+      }
+
+      if (event.key.length === 1 && !event.altKey && !event.shiftKey) {
+        const typed = event.key.toLowerCase();
+        const matchingIndices = actionableItems
+          .map((item, index) => ({ item, index }))
+          .filter(entry => entry.item.label.toLowerCase().startsWith(typed))
+          .map(entry => entry.index);
+
+        if (matchingIndices.length === 0) {
+          return;
+        }
+
+        event.preventDefault();
+        if (keyboardMenuItemIndex === null) {
+          setKeyboardMenuItemIndex(matchingIndices[0]);
+          return;
+        }
+
+        const currentMatchPosition = matchingIndices.findIndex(index => index === keyboardMenuItemIndex);
+        if (currentMatchPosition >= 0) {
+          const nextPosition = (currentMatchPosition + 1) % matchingIndices.length;
+          setKeyboardMenuItemIndex(matchingIndices[nextPosition]);
+          return;
+        }
+
+        const firstAfterCurrent = matchingIndices.find(index => index > keyboardMenuItemIndex);
+        setKeyboardMenuItemIndex(firstAfterCurrent ?? matchingIndices[0]);
+      }
+    };
+
+    document.addEventListener('mousedown', onDocumentMouseDown);
+    document.addEventListener('keydown', onEscape);
+
+    return () => {
+      document.removeEventListener('mousedown', onDocumentMouseDown);
+      document.removeEventListener('keydown', onEscape);
+    };
+  }, [keyboardMenuItemIndex, openMenu, visibleMenuGroups]);
+
+  useEffect(() => {
+    setKeyboardMenuItemIndex(null);
+  }, [openMenu?.label]);
+
+  useEffect(() => {
+    const onKeyDown = (event: KeyboardEvent) => {
+      if (event.defaultPrevented || event.metaKey || event.ctrlKey) {
+        return;
+      }
+
+      if (event.key === 'Alt' && !event.shiftKey) {
+        setShowMnemonics(true);
+        return;
+      }
+
+      if (event.altKey && event.key.length === 1) {
+        const targetMenuLabel = mnemonicByKey[event.key.toLowerCase()];
+        if (targetMenuLabel) {
+          event.preventDefault();
+          setShowMnemonics(true);
+          openMenuByLabel(targetMenuLabel);
+        }
+        return;
+      }
+
+      if (showMnemonics && event.key !== 'Shift') {
+        setShowMnemonics(false);
+      }
+    };
+
+    const onDocumentMouseDown = () => {
+      if (showMnemonics) {
+        setShowMnemonics(false);
+      }
+    };
+
+    document.addEventListener('keydown', onKeyDown);
+    document.addEventListener('mousedown', onDocumentMouseDown);
+
+    return () => {
+      document.removeEventListener('keydown', onKeyDown);
+      document.removeEventListener('mousedown', onDocumentMouseDown);
+    };
+  }, [mnemonicByKey, showMnemonics]);
+
+  const handleMenuButtonClick = (event: React.MouseEvent<HTMLButtonElement>, label: string) => {
+    const left = getMenuLeft(label);
+    if (left === null) {
+      return;
+    }
+
+    if (openMenu?.label === label) {
+      setOpenMenu(null);
+      setKeyboardMenuItemIndex(null);
+      return;
+    }
+
+    setOpenMenu({ label, left });
+  };
+
+  const handleMenuButtonMouseEnter = (event: React.MouseEvent<HTMLButtonElement>, label: string) => {
+    if (!openMenu || openMenu.label === label) {
+      return;
+    }
+
+    const buttonRect = event.currentTarget.getBoundingClientRect();
+    const rootRect = menuRootRef.current?.getBoundingClientRect();
+    const left = rootRect ? buttonRect.left - rootRect.left : buttonRect.left;
+    setOpenMenu({ label, left });
+  };
+
+  const handleMenuItemClick = (action: string) => {
+    setOpenMenu(null);
+    setKeyboardMenuItemIndex(null);
+    setShowMnemonics(false);
+    void window.electronAPI?.app?.triggerMenuAction?.(action);
+  };
+
+  const renderMenuLabel = (label: string) => {
+    if (!showMnemonics || label.length === 0) {
+      return label;
+    }
+
+    return (
+      <>
+        <span className="window-titlebar-menu-mnemonic">{label.charAt(0)}</span>
+        {label.slice(1)}
+      </>
+    );
+  };
+
+  const formatAccelerator = (accelerator: string): string => {
+    const firstPass = accelerator
+      .replace(/CmdOrCtrl/g, isMac ? '⌘' : 'Ctrl')
+      .replace(/Alt/g, isMac ? '⌥' : 'Alt')
+      .replace(/Shift/g, isMac ? '⇧' : 'Shift');
+    return firstPass;
+  };
+
+  const activeMenu = openMenu ? visibleMenuGroups.find(group => group.label === openMenu.label) : null;
 
   return (
-    <div className="window-titlebar" data-testid="window-titlebar">
+    <div className="window-titlebar" data-testid="window-titlebar" ref={menuRootRef}>
+      <div className="window-titlebar-menu-bar" data-testid="window-titlebar-menu-bar">
+        {visibleMenuGroups.map(group => (
+          <button
+            key={group.label}
+            ref={(element) => {
+              menuButtonRefs.current[group.label] = element;
+            }}
+            className={`window-titlebar-menu-button${openMenu?.label === group.label ? ' is-active' : ''}`}
+            type="button"
+            onClick={(event) => handleMenuButtonClick(event, group.label)}
+            onMouseEnter={(event) => handleMenuButtonMouseEnter(event, group.label)}
+            aria-label={group.label}
+          >
+            {renderMenuLabel(group.label)}
+          </button>
+        ))}
+      </div>
       <div className="window-titlebar-drag-region" />
+      <div className="window-titlebar-title" data-testid="window-titlebar-title" title={windowTitle}>
+        {windowTitle}
+      </div>
       <div className="window-titlebar-actions">
         <button
           className="window-titlebar-action-button"
@@ -19,7 +416,48 @@ export const WindowTitleBar: React.FC = () => {
             <span className="window-titlebar-sidebar-pane" data-shape="left-half" />
           </span>
         </button>
+        <button
+          className="window-titlebar-action-button"
+          aria-label="Toggle Panel"
+          onClick={togglePanel}
+          title={`${panelVisible ? 'Hide' : 'Show'} Panel (Ctrl+J)`}
+        >
+          <span className="window-titlebar-panel-icon" data-shape="frame-square" aria-hidden="true">
+            <span className="window-titlebar-panel-pane" data-shape="bottom-half" />
+          </span>
+        </button>
       </div>
+      {openMenu && activeMenu && (
+        <div
+          className="window-titlebar-menu-dropdown"
+          data-testid="window-titlebar-menu-dropdown"
+          style={{ left: `${openMenu.left}px` }}
+        >
+          {activeMenu.items.map((item) => {
+            if (item.separator) {
+              return <div key={item.action} className="window-titlebar-menu-separator" />;
+            }
+
+            const acceleratorText = item.accelerator ? formatAccelerator(item.accelerator) : null;
+            const actionableItems = activeMenu.items.filter(menuItem => !menuItem.separator);
+            const currentActionableIndex = actionableItems.findIndex(menuItem => menuItem.action === item.action);
+            const isKeyboardActive = keyboardMenuItemIndex !== null && keyboardMenuItemIndex === currentActionableIndex;
+
+            return (
+              <button
+                key={item.action}
+                type="button"
+                className={`window-titlebar-menu-item${isKeyboardActive ? ' is-keyboard-active' : ''}`}
+                onClick={() => handleMenuItemClick(item.action)}
+                aria-label={acceleratorText ? `${item.label} ${acceleratorText}` : item.label}
+              >
+                <span className="window-titlebar-menu-item-label">{item.label}</span>
+                {acceleratorText && <span className="window-titlebar-menu-item-accelerator">{acceleratorText}</span>}
+              </button>
+            );
+          })}
+        </div>
+      )}
     </div>
   );
 };
diff --git a/tests/engine/MediaEngine.test.ts b/tests/engine/MediaEngine.test.ts
index 73ce026..e662d7c 100644
--- a/tests/engine/MediaEngine.test.ts
+++ b/tests/engine/MediaEngine.test.ts
@@ -29,6 +29,7 @@ import { MediaEngine, MediaData } from '../../src/main/engine/MediaEngine';
 const mockMedia = new Map<string, any>();
 const mockPostMedia = new Map<string, any>();
 const mockFiles = new Map<string, Buffer | string>();
+const normalizePath = (value: string): string => value.replace(/\\/g, '/');
 
 // Track database operations for testing
 let mediaDeleteCalled = false;
@@ -126,7 +127,8 @@ vi.mock('../../src/main/database', () => ({
 // Mock fs/promises
 vi.mock('fs/promises', () => ({
   readFile: vi.fn(async (path: string) => {
-    const content = mockFiles.get(path);
+    const normalizedPath = normalizePath(path);
+    const content = mockFiles.get(normalizedPath);
     if (!content) {
       const error = new Error(`ENOENT: no such file or directory, open '${path}'`);
       (error as any).code = 'ENOENT';
@@ -135,29 +137,29 @@ vi.mock('fs/promises', () => ({
     return content;
   }),
   writeFile: vi.fn(async (path: string, content: Buffer | string) => {
-    mockFiles.set(path, content);
+    mockFiles.set(normalizePath(path), content);
   }),
   unlink: vi.fn(async (path: string) => {
-    mockFiles.delete(path);
+    mockFiles.delete(normalizePath(path));
   }),
   mkdir: vi.fn(async () => {}),
   readdir: vi.fn(async () => []),
   stat: vi.fn(async (path: string) => ({
-    isFile: () => mockFiles.has(path),
-    isDirectory: () => !mockFiles.has(path),
-    size: mockFiles.get(path)?.length || 0,
+    isFile: () => mockFiles.has(normalizePath(path)),
+    isDirectory: () => !mockFiles.has(normalizePath(path)),
+    size: mockFiles.get(normalizePath(path))?.length || 0,
   })),
   access: vi.fn(async (path: string) => {
-    if (!mockFiles.has(path)) {
+    if (!mockFiles.has(normalizePath(path))) {
       const error = new Error(`ENOENT`);
       (error as any).code = 'ENOENT';
       throw error;
     }
   }),
   copyFile: vi.fn(async (src: string, dest: string) => {
-    const content = mockFiles.get(src);
+    const content = mockFiles.get(normalizePath(src));
     if (content) {
-      mockFiles.set(dest, content);
+      mockFiles.set(normalizePath(dest), content);
     }
   }),
 }));
diff --git a/tests/engine/MetaEngine.test.ts b/tests/engine/MetaEngine.test.ts
index 012042e..28653c5 100644
--- a/tests/engine/MetaEngine.test.ts
+++ b/tests/engine/MetaEngine.test.ts
@@ -10,6 +10,7 @@
  */
 
 import { describe, it, expect, beforeEach, vi, afterEach } from 'vitest';
+import * as path from 'path';
 
 // Mock data stores
 const mockFiles = new Map<string, string>();
@@ -749,17 +750,20 @@ describe('MetaEngine', () => {
     });
 
     it('should use custom dataDir when provided in setProjectContext', () => {
-      metaEngine.setProjectContext('project-with-custom-dir', '/custom/data/path');
+      const customDataDir = path.join('custom', 'data', 'path');
+      metaEngine.setProjectContext('project-with-custom-dir', customDataDir);
       
       const metaDir = metaEngine.getMetaDir();
-      expect(metaDir).toContain('/custom/data/path');
+      expect(normalizePath(metaDir)).toContain(normalizePath(customDataDir));
     });
 
     it('should sync dataPath from database to project.json if different', async () => {
       const metaDir = metaEngine.getMetaDir();
+      const oldPath = path.join('old', 'path', 'from', 'file');
+      const newPath = path.join('new', 'path', 'from', 'database');
       mockFiles.set(normalizePath(`${metaDir}/project.json`), JSON.stringify({
         name: 'Project',
-        dataPath: '/old/path/from/file',
+        dataPath: oldPath,
       }));
       
       // Database has the currently selected (authoritative) path
@@ -767,7 +771,7 @@ describe('MetaEngine', () => {
         id: 'test-project',
         name: 'Project',
         description: null,
-        dataPath: '/new/path/from/database',
+        dataPath: newPath,
         slug: 'project',
         createdAt: new Date(),
         updatedAt: new Date(),
@@ -779,7 +783,7 @@ describe('MetaEngine', () => {
       const savedProjectJson = mockFiles.get(normalizePath(`${metaDir}/project.json`));
       expect(savedProjectJson).toBeDefined();
       const parsed = JSON.parse(savedProjectJson!);
-      expect(parsed.dataPath).toBe('/new/path/from/database');
+      expect(normalizePath(parsed.dataPath)).toBe(normalizePath(newPath));
       expect(mockLocalDb.update).not.toHaveBeenCalled();
     });
   });
diff --git a/tests/engine/ProjectEngine.test.ts b/tests/engine/ProjectEngine.test.ts
index 6cd0294..240e783 100644
--- a/tests/engine/ProjectEngine.test.ts
+++ b/tests/engine/ProjectEngine.test.ts
@@ -6,9 +6,12 @@
  */
 
 import { describe, it, expect, beforeEach, vi } from 'vitest';
+import * as path from 'path';
 import { ProjectEngine, ProjectData } from '../../src/main/engine/ProjectEngine';
 import { resetMockCounters } from '../utils/factories';
 
+const normalizePath = (value: string): string => value.replace(/\\/g, '/');
+
 // Create mock data stores
 const mockProjects = new Map<string, any>();
 
@@ -550,7 +553,7 @@ describe('ProjectEngine', () => {
 
   describe('Custom dataPath', () => {
     it('should create project with custom dataPath', async () => {
-      const customPath = '/Users/test/Documents/MyBlog';
+      const customPath = path.join('Users', 'test', 'Documents', 'MyBlog');
       const project = await projectEngine.createProject({
         name: 'Custom Path Project',
         dataPath: customPath,
@@ -561,7 +564,8 @@ describe('ProjectEngine', () => {
 
     it('should create meta and thumbnails directories in custom dataPath', async () => {
       const fs = await import('fs/promises');
-      const customPath = '/Users/test/Documents/MyBlog';
+      const customPath = path.join('Users', 'test', 'Documents', 'MyBlog');
+      const normalizedCustomPath = normalizePath(customPath);
       
       await projectEngine.createProject({
         name: 'Custom Dirs Project',
@@ -569,17 +573,18 @@ describe('ProjectEngine', () => {
       });
 
       const mkdirCalls = vi.mocked(fs.mkdir).mock.calls;
-      const createdPaths = mkdirCalls.map(call => call[0]);
+      const createdPaths = mkdirCalls.map(call => normalizePath(String(call[0])));
       
       // Should create meta/ and thumbnails/ in custom dataPath
-      expect(createdPaths).toContainEqual(expect.stringContaining(customPath));
-      expect(createdPaths.some(p => String(p).includes(customPath) && String(p).includes('meta'))).toBe(true);
-      expect(createdPaths.some(p => String(p).includes(customPath) && String(p).includes('thumbnails'))).toBe(true);
+      expect(createdPaths).toContainEqual(expect.stringContaining(normalizedCustomPath));
+      expect(createdPaths.some(p => p.includes(normalizedCustomPath) && p.includes('meta'))).toBe(true);
+      expect(createdPaths.some(p => p.includes(normalizedCustomPath) && p.includes('thumbnails'))).toBe(true);
     });
 
     it('should create posts and media directories in custom dataPath', async () => {
       const fs = await import('fs/promises');
-      const customPath = '/Users/test/Documents/MyBlog';
+      const customPath = path.join('Users', 'test', 'Documents', 'MyBlog');
+      const normalizedCustomPath = normalizePath(customPath);
       
       await projectEngine.createProject({
         name: 'Custom Data Project',
@@ -587,11 +592,11 @@ describe('ProjectEngine', () => {
       });
 
       const mkdirCalls = vi.mocked(fs.mkdir).mock.calls;
-      const createdPaths = mkdirCalls.map(call => call[0]);
+      const createdPaths = mkdirCalls.map(call => normalizePath(String(call[0])));
       
       // Should create posts/ and media/ in custom dataPath
-      expect(createdPaths.some(p => String(p).includes(customPath) && String(p).includes('posts'))).toBe(true);
-      expect(createdPaths.some(p => String(p).includes(customPath) && String(p).includes('media'))).toBe(true);
+      expect(createdPaths.some(p => p.includes(normalizedCustomPath) && p.includes('posts'))).toBe(true);
+      expect(createdPaths.some(p => p.includes(normalizedCustomPath) && p.includes('media'))).toBe(true);
     });
 
     it('should create meta and thumbnails in internal storage when no dataPath', async () => {
@@ -611,7 +616,7 @@ describe('ProjectEngine', () => {
 
     it('should use getDataDir with custom dataPath', () => {
       const projectId = 'test-id';
-      const customPath = '/Users/test/MyBlog';
+      const customPath = path.join('Users', 'test', 'MyBlog');
       
       const dataDir = projectEngine.getDataDir(projectId, customPath);
       
@@ -826,7 +831,7 @@ describe('ProjectEngine', () => {
         name: 'My Project',
         slug: 'my-project',
         description: 'A test project',
-        dataPath: '/custom/path',
+        dataPath: path.join('custom', 'path'),
         createdAt: new Date('2024-01-01'),
         updatedAt: new Date('2024-06-01'),
         isActive: true,
@@ -848,7 +853,7 @@ describe('ProjectEngine', () => {
       expect(result?.name).toBe('My Project');
       expect(result?.slug).toBe('my-project');
       expect(result?.description).toBe('A test project');
-      expect(result?.dataPath).toBe('/custom/path');
+      expect(result?.dataPath).toBe(path.join('custom', 'path'));
       expect(result?.isActive).toBe(true);
     });
 
@@ -1181,7 +1186,7 @@ describe('ProjectEngine', () => {
         id: 'resolved-project',
         name: 'Resolved Project',
         slug: 'resolved',
-        dataPath: '/custom/data/path',
+        dataPath: path.join('custom', 'data', 'path'),
         createdAt: new Date(),
         updatedAt: new Date(),
         isActive: false,
@@ -1198,8 +1203,9 @@ describe('ProjectEngine', () => {
 
       const paths = await projectEngine.getProjectPathsResolved('resolved-project');
 
-      expect(paths.posts).toContain('/custom/data/path');
-      expect(paths.media).toContain('/custom/data/path');
+      const normalizedBasePath = normalizePath(projectWithPath.dataPath);
+      expect(normalizePath(paths.posts)).toContain(normalizedBasePath);
+      expect(normalizePath(paths.media)).toContain(normalizedBasePath);
     });
 
     it('should use internal path when project has no dataPath', async () => {
diff --git a/tests/engine/mainStartup.test.ts b/tests/engine/mainStartup.test.ts
index 59f4a9e..f784c3c 100644
--- a/tests/engine/mainStartup.test.ts
+++ b/tests/engine/mainStartup.test.ts
@@ -6,6 +6,126 @@ describe('main bootstrap preview behavior', () => {
     vi.resetModules();
   });
 
+  it.each(['win32', 'linux'])('uses compact unified window decorations on %s', async (platform) => {
+    const originalPlatform = process.platform;
+    Object.defineProperty(process, 'platform', { value: platform });
+
+    const mockApp = {
+      name: 'bDS',
+      whenReady: vi.fn(() => Promise.resolve()),
+      on: vi.fn(),
+      quit: vi.fn(),
+    };
+
+    const browserWindowCalls: any[] = [];
+    class BrowserWindowMock {
+      static getAllWindows = vi.fn(() => [{ id: 1 }]);
+
+      loadURL = vi.fn();
+      loadFile = vi.fn();
+      on = vi.fn();
+      isDestroyed = vi.fn(() => false);
+      webContents = {
+        on: vi.fn(),
+        send: vi.fn(),
+        openDevTools: vi.fn(),
+        toggleDevTools: vi.fn(),
+      };
+
+      constructor(options: any) {
+        browserWindowCalls.push(options);
+      }
+    }
+
+    vi.doMock('electron', () => ({
+      app: mockApp,
+      BrowserWindow: BrowserWindowMock,
+      Menu: {
+        buildFromTemplate: vi.fn(() => ({})),
+        setApplicationMenu: vi.fn(),
+      },
+      ipcMain: {
+        on: vi.fn(),
+        handle: vi.fn(),
+        removeHandler: vi.fn(),
+      },
+      protocol: {
+        registerSchemesAsPrivileged: vi.fn(),
+        handle: vi.fn(),
+      },
+      net: {
+        fetch: vi.fn(),
+      },
+      shell: {
+        openExternal: vi.fn(),
+        openPath: vi.fn(),
+      },
+    }));
+
+    class MockPreviewServer {
+      start = vi.fn().mockResolvedValue(4123);
+      stop = vi.fn().mockResolvedValue(undefined);
+      getBaseUrl = vi.fn(() => 'http://127.0.0.1:4123');
+    }
+
+    vi.doMock('../../src/main/engine/PreviewServer', () => ({
+      PreviewServer: MockPreviewServer,
+    }));
+
+    vi.doMock('../../src/main/database', () => ({
+      getDatabase: vi.fn(() => ({
+        initializeLocal: vi.fn().mockResolvedValue(undefined),
+        close: vi.fn().mockResolvedValue(undefined),
+        getLocal: vi.fn(() => ({
+          select: vi.fn(() => ({
+            from: vi.fn(() => ({
+              where: vi.fn(() => ({
+                get: vi.fn().mockResolvedValue(null),
+              })),
+            })),
+          })),
+        })),
+        getDataPaths: vi.fn(() => ({ database: '/tmp/mock.db' })),
+      })),
+    }));
+
+    vi.doMock('../../src/main/ipc', () => ({
+      registerIpcHandlers: vi.fn(),
+      registerChatHandlers: vi.fn(),
+      initializeChatHandlers: vi.fn(),
+      cleanupChatHandlers: vi.fn().mockResolvedValue(undefined),
+    }));
+
+    vi.doMock('../../src/main/database/schema', () => ({
+      media: {},
+    }));
+
+    vi.doMock('drizzle-orm', () => ({
+      eq: vi.fn(),
+    }));
+
+    vi.doMock('../../src/main/engine/MediaEngine', () => ({
+      getMediaEngine: vi.fn(() => ({
+        getThumbnailPaths: vi.fn().mockResolvedValue({ small: null }),
+      })),
+    }));
+
+    await import('../../src/main/main');
+    await new Promise((resolve) => setTimeout(resolve, 0));
+
+    expect(browserWindowCalls[0]).toEqual(expect.objectContaining({
+      titleBarStyle: 'hidden',
+      titleBarOverlay: {
+        color: '#252526',
+        symbolColor: '#cccccc',
+        height: 34,
+      },
+      autoHideMenuBar: false,
+    }));
+
+    Object.defineProperty(process, 'platform', { value: originalPlatform });
+  });
+
   it('starts preview server during app startup', async () => {
     const mockApp = {
       name: 'bDS',
diff --git a/tests/ipc/handlers.test.ts b/tests/ipc/handlers.test.ts
index c8950e7..6d70b3b 100644
--- a/tests/ipc/handlers.test.ts
+++ b/tests/ipc/handlers.test.ts
@@ -16,6 +16,9 @@ const registeredHandlers = new Map<string, (...args: any[]) => Promise<any>>();
 
 // Mock ipcMain to capture handler registrations
 vi.mock('electron', () => ({
+  app: {
+    quit: vi.fn(),
+  },
   ipcMain: {
     handle: vi.fn((channel: string, handler: (...args: any[]) => Promise<any>) => {
       registeredHandlers.set(channel, handler);
@@ -27,6 +30,7 @@ vi.mock('electron', () => ({
   },
   shell: {
     openPath: vi.fn(),
+    openExternal: vi.fn(),
     showItemInFolder: vi.fn(),
   },
 }));
@@ -1339,6 +1343,61 @@ describe('IPC Handlers', () => {
         expect(result).toBe('/Users/test/bds/project-1');
       });
     });
+
+    describe('app:triggerMenuAction', () => {
+      it('should forward custom titlebar action to renderer menu channel', async () => {
+        const send = vi.fn();
+        const event = { sender: { send } };
+
+        await invokeHandlerWithEvent(event, 'app:triggerMenuAction', 'newPost');
+
+        expect(send).toHaveBeenCalledWith('menu:newPost');
+      });
+
+      it('should execute default edit actions on webContents sender', async () => {
+        const undo = vi.fn();
+        const send = vi.fn();
+        const event = { sender: { undo, send } };
+
+        await invokeHandlerWithEvent(event, 'app:triggerMenuAction', 'undo');
+
+        expect(undo).toHaveBeenCalled();
+        expect(send).not.toHaveBeenCalled();
+      });
+
+      it('should execute toggleDevTools on sender when action is toggleDevTools', async () => {
+        const toggleDevTools = vi.fn();
+        const send = vi.fn();
+        const event = { sender: { toggleDevTools, send } };
+
+        await invokeHandlerWithEvent(event, 'app:triggerMenuAction', 'toggleDevTools');
+
+        expect(toggleDevTools).toHaveBeenCalled();
+        expect(send).not.toHaveBeenCalled();
+      });
+
+      it('should quit the application when action is quit', async () => {
+        const { app } = await import('electron');
+        const send = vi.fn();
+        const event = { sender: { send } };
+
+        await invokeHandlerWithEvent(event, 'app:triggerMenuAction', 'quit');
+
+        expect(app.quit).toHaveBeenCalled();
+        expect(send).not.toHaveBeenCalled();
+      });
+
+      it('should open repository URL when action is viewOnGitHub', async () => {
+        const { shell } = await import('electron');
+        const send = vi.fn();
+        const event = { sender: { send } };
+
+        await invokeHandlerWithEvent(event, 'app:triggerMenuAction', 'viewOnGitHub');
+
+        expect(shell.openExternal).toHaveBeenCalledWith('https://github.com/rfc1437/bDS');
+        expect(send).not.toHaveBeenCalled();
+      });
+    });
   });
 
   // ============ Error Handling ============
diff --git a/tests/renderer/components/MilkdownMarkdownRoundTrip.test.ts b/tests/renderer/components/MilkdownMarkdownRoundTrip.test.ts
index cb70ed1..f4256b0 100644
--- a/tests/renderer/components/MilkdownMarkdownRoundTrip.test.ts
+++ b/tests/renderer/components/MilkdownMarkdownRoundTrip.test.ts
@@ -11,6 +11,7 @@ import { visit } from 'unist-util-visit';
 import { normalizeMilkdownMarkdown } from '../../../src/renderer/utils/markdownEscape';
 
 const wxrRefDir = path.join(__dirname, '../../assets/wxr-ref');
+const normalizeLineEndingsToLf = (value: string): string => value.replace(/\r\n/g, '\n');
 
 const remarkTightListsPlugin: Plugin<[Record<string, unknown>], Root> = () => {
   return (tree: Root) => {
@@ -42,13 +43,14 @@ describe('Milkdown markdown round trip', () => {
     const files = fs.readdirSync(wxrRefDir).filter((file) => file.endsWith('.md'));
 
     for (const file of files) {
-      const raw = fs.readFileSync(path.join(wxrRefDir, file), 'utf-8');
+      const raw = normalizeLineEndingsToLf(fs.readFileSync(path.join(wxrRefDir, file), 'utf-8'));
       const { content } = matter(raw);
+      const normalizedContent = normalizeLineEndingsToLf(content);
 
       const editor = await Editor.make()
         .config((ctx) => {
           ctx.set(rootCtx, root);
-          ctx.set(defaultValueCtx, content);
+          ctx.set(defaultValueCtx, normalizedContent);
           ctx.set(remarkStringifyOptionsCtx, {
             bullet: '-',
             listItemIndent: 'one',
@@ -59,16 +61,16 @@ describe('Milkdown markdown round trip', () => {
         .use(gfm)
         .create();
 
-      const serialized = editor.action((ctx) => {
+      const serialized = normalizeLineEndingsToLf(editor.action((ctx) => {
         const parser = ctx.get(parserCtx);
         const serializer = ctx.get(serializerCtx);
-        const doc = parser(content);
+        const doc = parser(normalizedContent);
         return normalizeMilkdownMarkdown(serializer(doc));
-      });
+      }));
 
       await editor.destroy();
 
-      expect(serialized, `round trip mismatch for ${file}`).toBe(content);
+      expect(serialized, `round trip mismatch for ${file}`).toBe(normalizedContent);
     }
   }, 30000);
 });
diff --git a/tests/renderer/components/TabBar.test.tsx b/tests/renderer/components/TabBar.test.tsx
index 122d914..efa4a26 100644
--- a/tests/renderer/components/TabBar.test.tsx
+++ b/tests/renderer/components/TabBar.test.tsx
@@ -78,4 +78,12 @@ describe('TabBar', () => {
     expect(await screen.findByText('abc123d feat: improve commit diff tabs')).toBeInTheDocument();
     expect((window as any).electronAPI.git.getHistory).toHaveBeenCalledWith('/repo/path', 200);
   });
+
+  it('does not render the tab bar when there are no open tabs', () => {
+    useAppStore.setState({ tabs: [], activeTabId: null });
+
+    const { container } = render(<TabBar />);
+
+    expect(container.querySelector('.tab-bar')).toBeNull();
+  });
 });
diff --git a/tests/renderer/components/WindowTitleBar.styles.test.ts b/tests/renderer/components/WindowTitleBar.styles.test.ts
new file mode 100644
index 0000000..fef3c65
--- /dev/null
+++ b/tests/renderer/components/WindowTitleBar.styles.test.ts
@@ -0,0 +1,33 @@
+import { describe, it, expect } from 'vitest';
+import * as fs from 'node:fs';
+import * as path from 'node:path';
+
+describe('WindowTitleBar styles', () => {
+  const cssPath = path.resolve(
+    __dirname,
+    '../../../src/renderer/components/WindowTitleBar/WindowTitleBar.css'
+  );
+
+  it('defines both standard and webkit drag regions for cross-platform support', () => {
+    const css = fs.readFileSync(cssPath, 'utf8');
+
+    expect(css).toMatch(/app-region:\s*drag;/);
+    expect(css).toMatch(/-webkit-app-region:\s*drag;/);
+    expect(css).toMatch(/app-region:\s*no-drag;/);
+    expect(css).toMatch(/-webkit-app-region:\s*no-drag;/);
+  });
+
+  it('reserves overlay control width to keep custom actions clickable on Windows/Linux', () => {
+    const css = fs.readFileSync(cssPath, 'utf8');
+
+    expect(css).toMatch(/padding-right:\s*calc\(10px\s*\+\s*var\(--bds-titlebar-overlay-right,\s*0px\)\)/);
+  });
+
+  it('uses neutral focus styling for menu buttons without blue accent outlines', () => {
+    const css = fs.readFileSync(cssPath, 'utf8');
+
+    expect(css).toMatch(/\.window-titlebar-menu-button:focus/);
+    expect(css).toMatch(/outline:\s*none;/);
+    expect(css).toMatch(/box-shadow:\s*none;/);
+  });
+});
diff --git a/tests/renderer/components/WindowTitleBar.test.tsx b/tests/renderer/components/WindowTitleBar.test.tsx
index a0d07bc..408f200 100644
--- a/tests/renderer/components/WindowTitleBar.test.tsx
+++ b/tests/renderer/components/WindowTitleBar.test.tsx
@@ -1,5 +1,5 @@
 import React from 'react';
-import { describe, it, expect, beforeEach } from 'vitest';
+import { describe, it, expect, beforeEach, vi } from 'vitest';
 import { fireEvent, render, screen } from '@testing-library/react';
 import { WindowTitleBar } from '../../../src/renderer/components/WindowTitleBar/WindowTitleBar';
 import { useAppStore } from '../../../src/renderer/store';
@@ -8,6 +8,7 @@ describe('WindowTitleBar', () => {
   beforeEach(() => {
     useAppStore.setState({
       sidebarVisible: true,
+      panelVisible: false,
     });
   });
 
@@ -36,4 +37,288 @@ describe('WindowTitleBar', () => {
     expect(iconFrame).toHaveAttribute('data-shape', 'frame-square');
     expect(iconPane).toHaveAttribute('data-shape', 'left-half');
   });
+
+  it('renders a right-side panel toggle button and toggles panel visibility', () => {
+    render(<WindowTitleBar />);
+
+    const toggleButton = screen.getByLabelText('Toggle Panel');
+    expect(toggleButton).toBeInTheDocument();
+    expect(toggleButton).toHaveAttribute('title', 'Show Panel (Ctrl+J)');
+
+    fireEvent.click(toggleButton);
+
+    expect(useAppStore.getState().panelVisible).toBe(true);
+    expect(toggleButton).toHaveAttribute('title', 'Hide Panel (Ctrl+J)');
+  });
+
+  it('uses a VS Code-like panel toggle icon shape', () => {
+    render(<WindowTitleBar />);
+
+    const toggleButton = screen.getByLabelText('Toggle Panel');
+    const iconFrame = toggleButton.querySelector('.window-titlebar-panel-icon');
+    const iconPane = toggleButton.querySelector('.window-titlebar-panel-pane');
+
+    expect(iconFrame).not.toBeNull();
+    expect(iconPane).not.toBeNull();
+    expect(iconFrame).toHaveAttribute('data-shape', 'frame-square');
+    expect(iconPane).toHaveAttribute('data-shape', 'bottom-half');
+  });
+
+  it('places panel toggle to the right of sidebar toggle', () => {
+    render(<WindowTitleBar />);
+
+    const actionButtons = Array.from(document.querySelectorAll('.window-titlebar-actions .window-titlebar-action-button'));
+
+    expect(actionButtons).toHaveLength(2);
+    expect(actionButtons[0]).toHaveAttribute('aria-label', 'Toggle Sidebar');
+    expect(actionButtons[1]).toHaveAttribute('aria-label', 'Toggle Panel');
+  });
+
+  it('updates overlay inset CSS variables when window controls geometry changes', () => {
+    const geometryListeners = new Set<EventListener>();
+    let rect = {
+      x: 0,
+      y: 0,
+      width: 924,
+      height: 34,
+      top: 0,
+      right: 924,
+      bottom: 34,
+      left: 0,
+      toJSON: () => '',
+    } as DOMRect;
+
+    const mockOverlay = {
+      visible: true,
+      getTitlebarAreaRect: () => rect,
+      addEventListener: (type: string, listener: EventListenerOrEventListenerObject) => {
+        if (type === 'geometrychange' && typeof listener === 'function') {
+          geometryListeners.add(listener);
+        }
+      },
+      removeEventListener: (type: string, listener: EventListenerOrEventListenerObject) => {
+        if (type === 'geometrychange' && typeof listener === 'function') {
+          geometryListeners.delete(listener);
+        }
+      },
+    };
+
+    Object.defineProperty(window, 'innerWidth', { value: 1024, configurable: true });
+    (navigator as Navigator & { windowControlsOverlay?: typeof mockOverlay }).windowControlsOverlay = mockOverlay;
+
+    render(<WindowTitleBar />);
+
+    expect(document.documentElement.style.getPropertyValue('--bds-titlebar-overlay-right')).toBe('100px');
+    expect(document.documentElement.style.getPropertyValue('--bds-titlebar-overlay-left')).toBe('0px');
+
+    rect = {
+      ...rect,
+      width: 824,
+      right: 824,
+    } as DOMRect;
+
+    geometryListeners.forEach(listener => listener(new Event('geometrychange')));
+
+    expect(document.documentElement.style.getPropertyValue('--bds-titlebar-overlay-right')).toBe('200px');
+  });
+
+  it('renders the window title centered in the custom title bar', () => {
+    document.title = 'Blogging Desktop Server';
+
+    render(<WindowTitleBar />);
+
+    const title = screen.getByTestId('window-titlebar-title');
+    expect(title).toBeInTheDocument();
+    expect(title).toHaveTextContent('Blogging Desktop Server');
+  });
+
+  it('renders VS Code-style top menu labels in the title bar', () => {
+    render(<WindowTitleBar />);
+
+    expect(screen.getByRole('button', { name: 'File' })).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: 'Edit' })).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: 'View' })).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: 'Blog' })).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: 'Help' })).toBeInTheDocument();
+  });
+
+  it('dispatches menu action through electron API when menu item is clicked', () => {
+    const triggerMenuAction = vi.fn().mockResolvedValue(undefined);
+    window.electronAPI.app = {
+      ...(window.electronAPI.app || {}),
+      triggerMenuAction,
+    };
+
+    render(<WindowTitleBar />);
+
+    fireEvent.click(screen.getByRole('button', { name: 'File' }));
+    fireEvent.click(screen.getByRole('button', { name: 'New Post Ctrl+N' }));
+
+    expect(triggerMenuAction).toHaveBeenCalledWith('newPost');
+  });
+
+  it('shows default edit actions with accelerators in Edit menu', () => {
+    render(<WindowTitleBar />);
+
+    fireEvent.click(screen.getByRole('button', { name: 'Edit' }));
+
+    expect(screen.getByRole('button', { name: 'Undo Ctrl+Z' })).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: 'Redo Ctrl+Y' })).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: 'Cut Ctrl+X' })).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: 'Copy Ctrl+C' })).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: 'Paste Ctrl+V' })).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: 'Select All Ctrl+A' })).toBeInTheDocument();
+  });
+
+  it('shows assigned accelerators in View and Blog menus', () => {
+    render(<WindowTitleBar />);
+
+    fireEvent.click(screen.getByRole('button', { name: 'View' }));
+    expect(screen.getByRole('button', { name: 'Posts Ctrl+1' })).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: 'Media Ctrl+2' })).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: 'Toggle Sidebar Ctrl+B' })).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: 'Toggle Panel Ctrl+J' })).toBeInTheDocument();
+
+    fireEvent.click(screen.getByRole('button', { name: 'Blog' }));
+    expect(screen.getByRole('button', { name: 'Publish Selected Ctrl+Shift+P' })).toBeInTheDocument();
+  });
+
+  it('shows Quit in File menu and View on GitHub in Help menu', () => {
+    render(<WindowTitleBar />);
+
+    fireEvent.click(screen.getByRole('button', { name: 'File' }));
+    expect(screen.getByRole('button', { name: 'Quit Ctrl+Q' })).toBeInTheDocument();
+
+    fireEvent.click(screen.getByRole('button', { name: 'Help' }));
+    expect(screen.getByRole('button', { name: 'View on GitHub' })).toBeInTheDocument();
+  });
+
+  it('switches to another menu on hover when a menu is already open', () => {
+    render(<WindowTitleBar />);
+
+    fireEvent.click(screen.getByRole('button', { name: 'File' }));
+    expect(screen.getByRole('button', { name: 'New Post Ctrl+N' })).toBeInTheDocument();
+
+    fireEvent.mouseEnter(screen.getByRole('button', { name: 'Edit' }));
+
+    expect(screen.getByRole('button', { name: 'Undo Ctrl+Z' })).toBeInTheDocument();
+    expect(screen.queryByRole('button', { name: 'New Post Ctrl+N' })).toBeNull();
+  });
+
+  it('shows menu mnemonics when Alt is pressed', () => {
+    const { container } = render(<WindowTitleBar />);
+
+    expect(container.querySelector('.window-titlebar-menu-mnemonic')).toBeNull();
+
+    fireEvent.keyDown(document, { key: 'Alt' });
+
+    expect(container.querySelector('.window-titlebar-menu-mnemonic')).not.toBeNull();
+  });
+
+  it('opens File menu when Alt+F is pressed', () => {
+    render(<WindowTitleBar />);
+
+    fireEvent.keyDown(document, { key: 'f', altKey: true });
+
+    expect(screen.getByRole('button', { name: 'New Post Ctrl+N' })).toBeInTheDocument();
+  });
+
+  it('navigates menu items with arrow keys and activates selection with Enter', () => {
+    const triggerMenuAction = vi.fn().mockResolvedValue(undefined);
+    window.electronAPI.app = {
+      ...(window.electronAPI.app || {}),
+      triggerMenuAction,
+    };
+
+    render(<WindowTitleBar />);
+
+    fireEvent.click(screen.getByRole('button', { name: 'File' }));
+    fireEvent.keyDown(document, { key: 'ArrowDown' });
+    fireEvent.keyDown(document, { key: 'Enter' });
+
+    expect(triggerMenuAction).toHaveBeenCalledWith('newPost');
+  });
+
+  it('switches open menu with ArrowRight and ArrowLeft', () => {
+    render(<WindowTitleBar />);
+
+    fireEvent.click(screen.getByRole('button', { name: 'File' }));
+    expect(screen.getByRole('button', { name: 'New Post Ctrl+N' })).toBeInTheDocument();
+
+    fireEvent.keyDown(document, { key: 'ArrowRight' });
+    expect(screen.getByRole('button', { name: 'Undo Ctrl+Z' })).toBeInTheDocument();
+
+    fireEvent.keyDown(document, { key: 'ArrowLeft' });
+    expect(screen.getByRole('button', { name: 'New Post Ctrl+N' })).toBeInTheDocument();
+  });
+
+  it('jumps to first and last menu item with Home and End', () => {
+    const triggerMenuAction = vi.fn().mockResolvedValue(undefined);
+    window.electronAPI.app = {
+      ...(window.electronAPI.app || {}),
+      triggerMenuAction,
+    };
+
+    render(<WindowTitleBar />);
+
+    fireEvent.click(screen.getByRole('button', { name: 'File' }));
+
+    fireEvent.keyDown(document, { key: 'End' });
+    fireEvent.keyDown(document, { key: 'Enter' });
+    expect(triggerMenuAction).toHaveBeenCalledWith('quit');
+
+    fireEvent.click(screen.getByRole('button', { name: 'File' }));
+    fireEvent.keyDown(document, { key: 'Home' });
+    fireEvent.keyDown(document, { key: 'Enter' });
+    expect(triggerMenuAction).toHaveBeenCalledWith('newPost');
+  });
+
+  it('jumps to matching item by first letter key and activates with Enter', () => {
+    const triggerMenuAction = vi.fn().mockResolvedValue(undefined);
+    window.electronAPI.app = {
+      ...(window.electronAPI.app || {}),
+      triggerMenuAction,
+    };
+
+    render(<WindowTitleBar />);
+
+    fireEvent.click(screen.getByRole('button', { name: 'File' }));
+    fireEvent.keyDown(document, { key: 'i' });
+    fireEvent.keyDown(document, { key: 'Enter' });
+
+    expect(triggerMenuAction).toHaveBeenCalledWith('importMedia');
+  });
+
+  it('cycles through same-letter matches on repeated key presses', () => {
+    const triggerMenuAction = vi.fn().mockResolvedValue(undefined);
+    window.electronAPI.app = {
+      ...(window.electronAPI.app || {}),
+      triggerMenuAction,
+    };
+
+    render(<WindowTitleBar />);
+
+    fireEvent.click(screen.getByRole('button', { name: 'Edit' }));
+    fireEvent.keyDown(document, { key: 'r' });
+    fireEvent.keyDown(document, { key: 'r' });
+    fireEvent.keyDown(document, { key: 'Enter' });
+
+    expect(triggerMenuAction).toHaveBeenCalledWith('replace');
+  });
+
+  it('shows Toggle Developer Tools in View menu in development mode', () => {
+    (window as Window & { __BDS_IS_DEV__?: boolean }).__BDS_IS_DEV__ = true;
+    const triggerMenuAction = vi.fn().mockResolvedValue(undefined);
+    window.electronAPI.app = {
+      ...(window.electronAPI.app || {}),
+      triggerMenuAction,
+    };
+
+    render(<WindowTitleBar />);
+
+    fireEvent.click(screen.getByRole('button', { name: 'View' }));
+    fireEvent.click(screen.getByRole('button', { name: 'Toggle Developer Tools Ctrl+Shift+I' }));
+
+    expect(triggerMenuAction).toHaveBeenCalledWith('toggleDevTools');
+  });
 });
diff --git a/tests/setup.ts b/tests/setup.ts
index c442868..edbda9f 100644
--- a/tests/setup.ts
+++ b/tests/setup.ts
@@ -124,6 +124,9 @@ Object.defineProperty(globalThis, 'window', {
         cancel: vi.fn(),
         clearCompleted: vi.fn(),
       },
+      app: {
+        triggerMenuAction: vi.fn(),
+      },
       import: {
         selectAndAnalyze: vi.fn(),
         analyzeFile: vi.fn(),