fix(titlebar): reserve Windows window controls for logo

tests/e2e/windows-titlebar.spec.ts

@@ -0,0 +1,20 @@
+import { closeElectronApp, expect, getStableWindow, test } from './fixtures/electron';
+
+test('keeps the Canvas logo clear of Windows window controls', async ({ launchElectronApp }) => {
+  test.skip(process.platform !== 'win32', 'Windows custom titlebar only');
+  const app = await launchElectronApp({ skipSetup: true });
+
+  try {
+    const page = await getStableWindow(app);
+    await expect(page.getByTestId('ai-module-selection-page')).toBeVisible();
+    await page.getByTestId('ai-module-option-painting').click();
+
+    const logoBounds = await page.getByTestId('titlebar-logo').boundingBox();
+    const minimizeBounds = await page.getByTitle('Minimize').boundingBox();
+    expect(logoBounds).not.toBeNull();
+    expect(minimizeBounds).not.toBeNull();
+    expect(logoBounds!.x + logoBounds!.width).toBeLessThanOrEqual(minimizeBounds!.x);
+  } finally {
+    await closeElectronApp(app);
+  }
+});