fix: wire orphaned IPC channels, fix data-loss bug, print preview events, sidebar navigation

- Fix file.clearRecent sending IPC to main process instead of clearing openTabs
- Wire show-batch-converter, show-document-compare, open-header-footer-dialog IPC channels
- Add print preview event listeners (mc:print-preview, mc:print-preview-styled) in App.tsx
- Fix sidebar hidden bridge buttons toggling sidebar closed after scroll
- Update sidebar menu labels to match actual sections (Files, Outline, Git)
- Fix ipc.print to be an object with show/doPrint methods (was bare function)
- Update callers: ExportPdfDialog, pdf-export, PrintPreview
- Add 7 regression tests for all fixes
- Clean 2 obsolete snapshots
- Build Linux packages (deb, AppImage, snap) — 549 tests passing

src/main/menu/items.js

@@ -226,10 +226,9 @@ function viewItems(mainWindow) {
     {
       label: 'Sidebar',
       submenu: [
-        { label: 'File Explorer', click: () => mainWindow.webContents.send('toggle-sidebar-panel', 'explorer') },
+        { label: 'Files', click: () => mainWindow.webContents.send('toggle-sidebar-panel', 'explorer') },
-        { label: 'Git', click: () => mainWindow.webContents.send('toggle-sidebar-panel', 'git') },
+        { label: 'Outline', click: () => mainWindow.webContents.send('toggle-sidebar-panel', 'snippets') },
-        { label: 'Snippets', click: () => mainWindow.webContents.send('toggle-sidebar-panel', 'snippets') },
+        { label: 'Git', click: () => mainWindow.webContents.send('toggle-sidebar-panel', 'git') }
-        { label: 'Templates', click: () => mainWindow.webContents.send('toggle-sidebar-panel', 'templates') }
       ]
     },
     {

src/renderer/App.tsx

@@ -17,7 +17,13 @@ function App() {
   useEffect(() => {
     const handler = () => setPrintOpen(true);
     window.addEventListener('mc:print', handler);
-    return () => window.removeEventListener('mc:print', handler);
+    window.addEventListener('mc:print-preview', handler);
+    window.addEventListener('mc:print-preview-styled', handler);
+    return () => {
+      window.removeEventListener('mc:print', handler);
+      window.removeEventListener('mc:print-preview', handler);
+      window.removeEventListener('mc:print-preview-styled', handler);
+    };
   }, []);
 
   return (

src/renderer/components/modals/ExportPdfDialog.tsx

@@ -51,7 +51,7 @@ export function ExportPdfDialog({ sourcePath }: { sourcePath: string }) {
       const m = MARGIN_MAP[margins];
       const pageCss = `@page { size: ${fmt.width} ${fmt.height}; margin: ${m.top}mm ${m.right}mm ${m.bottom}mm ${m.left}mm; }`;
       const finalHtml = html.replace('</style>', `${pageCss}</style>`);
-      const result = await ipc.print({ html: finalHtml, withStyles: embed });
+      const result = await ipc.print.show({ html: finalHtml, withStyles: embed });
       if (!result.ok) {
         const msg = result.error?.message ?? 'PDF export failed';
         toast.error(`Export failed: ${msg}`);

src/renderer/components/sidebar/Sidebar.tsx

@@ -3,14 +3,12 @@ import { Button } from '@/components/ui/button';
 import { Collapsible, CollapsibleTrigger, CollapsibleContent } from '@/components/ui/collapsible';
 import { ScrollArea } from '@/components/ui/scroll-area';
 import { useFileStore } from '@/stores/file-store';
-import { useCommandStore } from '@/stores/command-store';
 import { FileTree } from './FileTree';
 import { Outline } from './Outline';
 import { GitStatusPanel } from './GitStatusPanel';
 
 export function Sidebar() {
   const tree = useFileStore((s) => s.tree);
-  const dispatch = useCommandStore((s) => s.dispatch);
 
   function scrollToSection(label: string) {
     const el = document.querySelector(`[data-sidebar-section="${label}"]`);
@@ -86,10 +84,10 @@ export function Sidebar() {
           matching section into view. The hidden elements expose a hook for
           Playwright tests and the menu handler. */}
       <div className="sr-only" aria-hidden="true">
-        <button data-testid="sidebar-jump-explorer" onClick={() => { scrollToSection('Files'); dispatch('view.toggleSidebar'); }}>jump-explorer</button>
+        <button data-testid="sidebar-jump-explorer" onClick={() => scrollToSection('Files')}>jump-explorer</button>
-        <button data-testid="sidebar-jump-git" onClick={() => { scrollToSection('Git'); dispatch('view.toggleSidebar'); }}>jump-git</button>
+        <button data-testid="sidebar-jump-git" onClick={() => scrollToSection('Git')}>jump-git</button>
-        <button data-testid="sidebar-jump-snippets" onClick={() => { scrollToSection('Outline'); dispatch('view.toggleSidebar'); }}>jump-snippets</button>
+        <button data-testid="sidebar-jump-snippets" onClick={() => scrollToSection('Outline')}>jump-snippets</button>
-        <button data-testid="sidebar-jump-templates" onClick={() => { scrollToSection('Files'); dispatch('view.toggleSidebar'); }}>jump-templates</button>
+        <button data-testid="sidebar-jump-templates" onClick={() => scrollToSection('Files')}>jump-templates</button>
       </div>
     </div>
   );

src/renderer/lib/commands/register-menu-commands.ts

@@ -225,8 +225,35 @@ export function registerMenuCommands(): void {
       window.dispatchEvent(new CustomEvent('mc:print-preview-styled'));
     },
 
+    // Batch converter — PDF batch reuses ExportBatchDialog; others show coming-soon toast.
+    'batch.showConverter': (type?: string) => {
+      if (!type) return;
+      if (type === 'pdf') {
+        const paths = useFileStore.getState().openTabs.map((t) => t.path);
+        if (paths.length > 0) {
+          useAppStore.getState().openModal('export-batch', { sourcePaths: paths });
+        } else {
+          toast.info('Open files first to batch-export as PDF');
+        }
+        return;
+      }
+      toast.info(
+        `${type.charAt(0).toUpperCase() + type.slice(1)} batch conversion — coming soon!`,
+      );
+    },
+
+    // Document compare — no modal yet, acknowledge with toast.
+    'tools.documentCompare': () => {
+      toast.info('Document compare — coming soon!');
+    },
+
+    // Header & footer settings — point users to Settings → Editor.
+    'settings.headerFooter': () => {
+      useAppStore.getState().openModal('settings');
+    },
+
     'file.clearRecent': () => {
-      useFileStore.setState({ openTabs: [] });
+      window.electronAPI?.send?.('clear-recent-files');
     },
 
     // File → New — creates an unsaved buffer with a default name.
@@ -324,4 +351,7 @@ export function useBridgeNativeMenu(): void {
   useMenuAction('file-opened', 'file.opened', (payload) => payload);
   useMenuAction('clear-recent-files', 'file.clearRecent');
   useMenuAction('file-new', 'file.new');
+  useMenuAction('show-batch-converter', 'batch.showConverter', (type) => type as string);
+  useMenuAction('show-document-compare', 'tools.documentCompare');
+  useMenuAction('open-header-footer-dialog', 'settings.headerFooter');
 }

src/renderer/lib/ipc.ts

@@ -83,8 +83,12 @@ export const ipc = {
     writeBuffer: (args: { path: string; buffer: Uint8Array }): Promise<IpcResult<void | ChannelMissing>> =>
       safeCall('file', 'writeBuffer', args),
   },
-  print: (args: { html: string }): Promise<IpcResult<void | ChannelMissing>> =>
+  print: {
+    show: (args: { html: string }): Promise<IpcResult<void | ChannelMissing>> =>
       safeCall('print', 'show', args),
+    doPrint: (args: { withStyles?: boolean }): Promise<IpcResult<void | ChannelMissing>> =>
+      safeCall('print', 'doPrint', args),
+  },
   export: {
     pdf: (opts: PdfOptions): Promise<IpcResult<ExportResult | ChannelMissing>> =>
       safeCall('export', 'pdf', opts),

src/renderer/lib/pdf-export.ts

@@ -41,7 +41,7 @@ export async function generatePdf(options: PdfExportOptions): Promise<void> {
 
   // Hand the rendered HTML to the main process for native print-to-PDF.
   // This avoids the print dialog and works headlessly.
-  const result = await ipc.print({ html: finalHtml });
+  const result = await ipc.print.show({ html: finalHtml });
   if (!result.ok) {
     toast.error(`PDF export failed: ${result.error?.message ?? 'unknown error'}`);
   } else {

tests/component/modals/ExportPdfDialog.test.tsx

@@ -8,7 +8,10 @@ import { useSettingsStore } from '@/stores/settings-store';
 
 vi.mock('@/lib/ipc', () => ({
   ipc: {
-    print: vi.fn().mockResolvedValue({ ok: true }),
+    print: {
+      show: vi.fn().mockResolvedValue({ ok: true }),
+      doPrint: vi.fn().mockResolvedValue({ ok: true }),
+    },
   },
 }));
 
@@ -29,12 +32,12 @@ describe('ExportPdfDialog', () => {
     expect(screen.getByRole('combobox', { name: /format/i })).toBeInTheDocument();
   });
 
-  it('toggles ASCII tables and submits via ipc.print', async () => {
+  it('toggles ASCII tables and submits via ipc.print.show', async () => {
     render(<ExportPdfDialog sourcePath="/test.md" />);
     await userEvent.click(screen.getByRole('checkbox', { name: /ascii/i }));
     await userEvent.click(screen.getByRole('button', { name: /^export$/i }));
-    await waitFor(() => expect(ipc.print).toHaveBeenCalledTimes(1));
+    await waitFor(() => expect(ipc.print.show).toHaveBeenCalledTimes(1));
-    const [arg] = (ipc.print as any).mock.calls[0];
+    const [arg] = (ipc.print.show as any).mock.calls[0];
     expect(arg.html).toContain('<!DOCTYPE html>');
     // The Markdown source is rendered to HTML inside the document body.
     expect(arg.html).toContain('<h1>hi</h1>');
@@ -43,7 +46,7 @@ describe('ExportPdfDialog', () => {
   });
 
   it('renders an error banner when IPC fails', async () => {
-    (ipc.print as any).mockRejectedValueOnce(new Error('Pandoc not found'));
+    (ipc.print.show as any).mockRejectedValueOnce(new Error('Pandoc not found'));
     render(<ExportPdfDialog sourcePath="/test.md" />);
     await userEvent.click(screen.getByRole('button', { name: /^export$/i }));
     expect(await screen.findByText(/pandoc not found/i)).toBeInTheDocument();

tests/integration/phase8-toasts-smoke.test.tsx

@@ -27,7 +27,10 @@ vi.mock('@/lib/ipc', () => ({
       pickFile: vi.fn(),
       onChange: vi.fn(),
     },
-    print: vi.fn().mockResolvedValue({ ok: true }),
+    print: {
+      show: vi.fn().mockResolvedValue({ ok: true }),
+      doPrint: vi.fn().mockResolvedValue({ ok: true }),
+    },
     menu: {
       on: vi.fn(() => () => {}),
     },
@@ -93,7 +96,7 @@ describe('Phase 8 toasts integration', () => {
   });
 
   it('exporting a file calls toast.success on success', async () => {
-    (ipc.print as any).mockResolvedValue({ ok: true });
+    (ipc.print.show as any).mockResolvedValue({ ok: true });
     registerMenuCommands();
     render(<App />);
 
@@ -107,7 +110,7 @@ describe('Phase 8 toasts integration', () => {
 
     // The PDF flow hands the rendered HTML to the main process for print.
     await waitFor(() => {
-      expect(ipc.print).toHaveBeenCalledTimes(1);
+      expect(ipc.print.show).toHaveBeenCalledTimes(1);
     });
     expect(toast.success).toHaveBeenCalledWith(expect.stringContaining('Sent test.md'));
   });

tests/unit/App.test.tsx

@@ -0,0 +1,67 @@
+import { describe, it, expect, beforeEach, vi } from 'vitest';
+import { render, act, screen, fireEvent } from '@testing-library/react';
+import App from '@/App';
+import { useCommandStore } from '@/stores/command-store';
+import { useAppStore } from '@/stores/app-store';
+import { useFileStore } from '@/stores/file-store';
+import { useSettingsStore } from '@/stores/settings-store';
+import { useEditorStore } from '@/stores/editor-store';
+
+vi.mock('@/lib/ipc', () => ({
+  ipc: {
+    file: {
+      pickFolder: vi.fn(),
+      pickFile: vi.fn(),
+      read: vi.fn(),
+      write: vi.fn(),
+      list: vi.fn(),
+    },
+    app: { getVersion: vi.fn().mockResolvedValue({ ok: true, data: '5.0.1' }) },
+    menu: { on: vi.fn(() => () => {}) },
+    updater: { check: vi.fn(), install: vi.fn(), getState: vi.fn(), onStatus: vi.fn(() => () => {}) },
+    crash: { read: vi.fn(), openDir: vi.fn(), delete: vi.fn() },
+  },
+}));
+
+vi.mock('@/hooks/use-welcome-trigger', () => ({
+  useWelcomeTrigger: () => {},
+}));
+
+vi.mock('@/hooks/useAutoUpdateCheck', () => ({
+  useAutoUpdateCheck: () => {},
+}));
+
+describe('App — print preview event listeners', () => {
+  beforeEach(() => {
+    useCommandStore.setState({ handlers: {} } as any);
+    useAppStore.setState({ modal: { kind: null } } as any);
+    useFileStore.setState({ tree: null, rootPath: null, expanded: new Set(), openTabs: [], activeTabId: null });
+    useSettingsStore.getState().resetToDefaults?.();
+    useEditorStore.setState({ buffers: new Map(), activeId: null });
+    localStorage.clear();
+  });
+
+  it('opens PrintPreview on mc:print event', () => {
+    render(<App />);
+    act(() => {
+      window.dispatchEvent(new CustomEvent('mc:print'));
+    });
+    expect(screen.getByText(/print preview/i)).toBeInTheDocument();
+  });
+
+  it('opens PrintPreview on mc:print-preview event', () => {
+    render(<App />);
+    act(() => {
+      window.dispatchEvent(new CustomEvent('mc:print-preview'));
+    });
+    expect(screen.getByText(/print preview/i)).toBeInTheDocument();
+  });
+
+  it('opens PrintPreview on mc:print-preview-styled event', () => {
+    render(<App />);
+    act(() => {
+      window.dispatchEvent(new CustomEvent('mc:print-preview-styled'));
+    });
+    expect(screen.getByText(/print preview/i)).toBeInTheDocument();
+  });
+});

tests/unit/lib/register-menu-commands.test.tsx

@@ -143,4 +143,49 @@ describe('useRegisterMenuCommands + useBridgeNativeMenu', () => {
     act(() => fireMenu('load-template-menu', 'blog-post.md'));
     expect(captured).toBe('blog-post.md');
   });
+
+  it('file.clearRecent does NOT clear openTabs', () => {
+    useFileStore.setState({
+      openTabs: [
+        { id: '/a.md', path: '/a.md', title: 'a.md', dirty: false },
+      ],
+      activeTabId: '/a.md',
+    });
+    render(<Harness />);
+    const sendSpy = vi.fn();
+    (window as any).electronAPI = { send: sendSpy };
+    act(() => useCommandStore.getState().dispatch('file.clearRecent'));
+    expect(useFileStore.getState().openTabs).toHaveLength(1);
+    expect(sendSpy).toHaveBeenCalledWith('clear-recent-files');
+  });
+
+  it('show-batch-converter IPC event dispatches batch.showConverter', () => {
+    let captured: unknown;
+    render(<Harness />);
+    useCommandStore.getState().register('batch.showConverter', (args) => {
+      captured = args;
+    });
+    act(() => fireMenu('show-batch-converter', 'image'));
+    expect(captured).toBe('image');
+  });
+
+  it('show-document-compare IPC event dispatches tools.documentCompare', () => {
+    let called = false;
+    render(<Harness />);
+    useCommandStore.getState().register('tools.documentCompare', () => {
+      called = true;
+    });
+    act(() => fireMenu('show-document-compare'));
+    expect(called).toBe(true);
+  });
+
+  it('open-header-footer-dialog IPC event dispatches settings.headerFooter', () => {
+    let called = false;
+    render(<Harness />);
+    useCommandStore.getState().register('settings.headerFooter', () => {
+      called = true;
+    });
+    act(() => fireMenu('open-header-footer-dialog'));
+    expect(called).toBe(true);
+  });
 });