test: add Playwright smoke test for Open in New Window command

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/smoke/open-in-new-window.spec.ts

@@ -0,0 +1,41 @@
+import { test, expect } from '@playwright/test'
+import { openCommandPalette, findCommand } from './helpers'
+
+test.describe('Open in New Window', () => {
+  test.beforeEach(async ({ page }) => {
+    await page.goto('/')
+    await page.waitForLoadState('networkidle')
+  })
+
+  test('"Open in New Window" command appears in palette when note is active', async ({ page }) => {
+    // Open a note first (click first item in note list)
+    const firstNote = page.locator('.cursor-pointer.border-b').first()
+    await expect(firstNote).toBeVisible({ timeout: 3_000 })
+    await firstNote.click()
+
+    // Wait for editor to load
+    await expect(page.locator('.bn-editor')).toBeVisible({ timeout: 3_000 })
+
+    // Open command palette and search
+    await openCommandPalette(page)
+    const found = await findCommand(page, 'Open in New Window')
+    expect(found).toBe(true)
+  })
+
+  test('"Open in New Window" shows shortcut hint', async ({ page }) => {
+    // Open a note
+    const firstNote = page.locator('.cursor-pointer.border-b').first()
+    await expect(firstNote).toBeVisible({ timeout: 3_000 })
+    await firstNote.click()
+    await expect(page.locator('.bn-editor')).toBeVisible({ timeout: 3_000 })
+
+    // Open command palette and search for the command
+    await openCommandPalette(page)
+    const input = page.locator('input[placeholder="Type a command..."]')
+    await input.fill('Open in New Window')
+
+    // The shortcut hint should be visible
+    const commandRow = page.locator('text=Open in New Window').first()
+    await expect(commandRow).toBeVisible({ timeout: 2_000 })
+  })
+})