diff --git a/src/main/ipc/settingsApi.ts b/src/main/ipc/settingsApi.ts
index e4f6b0d..1d51f7f 100644
--- a/src/main/ipc/settingsApi.ts
+++ b/src/main/ipc/settingsApi.ts
@@ -8,6 +8,23 @@ import type { ExportService } from '../services/ExportService.js';
 import type { ImportService } from '../services/ImportService.js';
 import type { SyncService } from '../services/SyncService.js';
 import type { TelemetryService } from '../services/TelemetryService.js';
+import { getInboxWindow as getInboxWindowSingleton } from '../windows/inboxWindow.js';
+
+/**
+ * 외부 (트레이 / second-instance / 기타 main 프로세스 호출자) 에서 inbox 창에 view 전환을
+ * 요청하는 진입점. 창이 숨겨져 있으면 show + focus 후 'inbox:navigate' IPC 이벤트를
+ * renderer 로 전달.
+ *
+ * Task 13 (v0.2.7) — 트레이 "설정..." 메뉴 wiring 은 Task 16 에서 본 함수 호출.
+ */
+export function navigateInbox(view: 'inbox' | 'trash' | 'settings'): void {
+  const win = getInboxWindowSingleton();
+  if (win && !win.isDestroyed()) {
+    if (!win.isVisible()) win.show();
+    win.focus();
+    win.webContents.send('inbox:navigate', view);
+  }
+}
 
 export interface SettingsIpcDeps {
   backup: BackupService;
diff --git a/src/preload/index.ts b/src/preload/index.ts
index 65e06ca..f71adca 100644
--- a/src/preload/index.ts
+++ b/src/preload/index.ts
@@ -52,6 +52,12 @@ const api: InklingApi = {
       ipcRenderer.on('inbox:openOllamaSettings', handler);
       return () => ipcRenderer.removeListener('inbox:openOllamaSettings', handler);
     },
+    // v0.2.7 Task 13 — 외부 (트레이) 에서 view 전환 요청 listener.
+    onNavigate: (cb: (view: 'inbox' | 'trash' | 'settings') => void) => {
+      const listener = (_e: unknown, view: 'inbox' | 'trash' | 'settings') => cb(view);
+      ipcRenderer.on('inbox:navigate', listener);
+      return () => ipcRenderer.off('inbox:navigate', listener);
+    },
     // v0.2.7 자동 실행 (임시 채널 — Task 22 에서 settings:autostart-state / settings:autostart-set 으로 rename)
     getAutostart: () => ipcRenderer.invoke('settings:get-autostart'),
     setAutostart: (open: boolean) => ipcRenderer.invoke('settings:set-autostart', open),
diff --git a/src/renderer/inbox/App.tsx b/src/renderer/inbox/App.tsx
index 91a11fc..85ed039 100644
--- a/src/renderer/inbox/App.tsx
+++ b/src/renderer/inbox/App.tsx
@@ -37,9 +37,20 @@ export function App(): React.ReactElement {
       useInbox.setState({ ollamaStatus: status });
     });
     const unsubOllamaSettings = inboxApi.onOpenOllamaSettings(() => setOllamaSettingsOpen(true));
+    const unsubNav = inboxApi.onNavigate((view) => {
+      if (view === 'settings') {
+        useInbox.getState().setShowSettings(true);
+      } else if (view === 'inbox') {
+        useInbox.getState().setShowSettings(false);
+        if (useInbox.getState().showTrash) void useInbox.getState().toggleShowTrash();
+      } else if (view === 'trash') {
+        useInbox.getState().setShowSettings(false);
+        if (!useInbox.getState().showTrash) void useInbox.getState().toggleShowTrash();
+      }
+    });
     const onFocus = () => { void refreshMeta(); };
     window.addEventListener('focus', onFocus);
-    return () => { unsubNote(); unsubOllama(); unsubOllamaSettings(); window.removeEventListener('focus', onFocus); };
+    return () => { unsubNote(); unsubOllama(); unsubOllamaSettings(); unsubNav(); window.removeEventListener('focus', onFocus); };
     // onOllamaStatus 콜백은 useInbox.setState 직접 호출 — store reference 가 안정적이라
     // deps array 에 추가 불필요. mount 시 1회 구독 + unmount 시 해제.
   }, [loadInitial, refreshMeta, upsertNote]);
diff --git a/src/shared/types.ts b/src/shared/types.ts
index 5be2325..7260b0a 100644
--- a/src/shared/types.ts
+++ b/src/shared/types.ts
@@ -92,6 +92,8 @@ export interface InboxApi {
   loadOllamaSettings(): Promise<{ endpoint: string; model: string } | null>;
   saveOllamaSettings(v: { endpoint: string; model: string }): Promise<{ ok: true } | { ok: false; reason: string }>;
   onOpenOllamaSettings(cb: () => void): () => void;
+  // v0.2.7 Task 13 — 외부 (트레이 등) 에서 view 전환 요청 구독.
+  onNavigate(cb: (view: 'inbox' | 'trash' | 'settings') => void): () => void;
   // v0.2.7 자동 실행 (임시 채널 — Task 22 에서 정식 이름으로 rename)
   getAutostart(): Promise<{ openAtLogin: boolean }>;
   setAutostart(open: boolean): Promise<{ openAtLogin: boolean }>;
diff --git a/tests/unit/App.test.tsx b/tests/unit/App.test.tsx
index 947cf1f..5e65be9 100644
--- a/tests/unit/App.test.tsx
+++ b/tests/unit/App.test.tsx
@@ -1,7 +1,7 @@
 // @vitest-environment jsdom
 import { describe, it, expect, vi, beforeEach } from 'vitest';
 import '@testing-library/jest-dom/vitest';
-import { render, screen, fireEvent, cleanup } from '@testing-library/react';
+import { render, screen, fireEvent, cleanup, waitFor } from '@testing-library/react';
 
 vi.mock('../../src/renderer/inbox/api.js', () => ({
   inboxApi: {
@@ -20,6 +20,7 @@ vi.mock('../../src/renderer/inbox/api.js', () => ({
     onNoteUpdated: vi.fn(() => () => undefined),
     onOllamaStatus: vi.fn(() => () => undefined),
     onOpenOllamaSettings: vi.fn(() => () => undefined),
+    onNavigate: vi.fn(() => () => undefined),
     // 4 섹션 mounted 시 호출되는 stub
     loadOllamaSettings: vi.fn(async () => ({ endpoint: '', model: '' })),
     saveOllamaSettings: vi.fn(async () => ({ ok: true })),
@@ -39,6 +40,7 @@ vi.mock('../../src/renderer/inbox/api.js', () => ({
 
 import { App } from '../../src/renderer/inbox/App';
 import { useInbox } from '../../src/renderer/inbox/store';
+import { inboxApi } from '../../src/renderer/inbox/api.js';
 
 describe('App — settings view', () => {
   beforeEach(() => {
@@ -58,4 +60,19 @@ describe('App — settings view', () => {
     fireEvent.click(await screen.findByLabelText('설정 열기'));
     expect(useInbox.getState().showSettings).toBe(true);
   });
+
+  it('inbox:navigate "settings" event sets showSettings=true', async () => {
+    const navHandlers: Array<(view: 'inbox' | 'trash' | 'settings') => void> = [];
+    vi.mocked(inboxApi.onNavigate).mockImplementation((cb) => {
+      navHandlers.push(cb);
+      return () => {
+        const i = navHandlers.indexOf(cb);
+        if (i >= 0) navHandlers.splice(i, 1);
+      };
+    });
+    render(<App />);
+    await waitFor(() => expect(navHandlers.length).toBeGreaterThan(0));
+    navHandlers.forEach((h) => h('settings'));
+    await waitFor(() => expect(useInbox.getState().showSettings).toBe(true));
+  });
 });