Stabilize install app integration test assertion

tests/integration/install/installApp.spec.ts

@@ -1,7 +1,7 @@
 import { expect, test } from '../testExtensions';
 
 test.describe('Install App', () => {
-  test('Can install app', async ({ installWizard, installedApp, serverStart, testEnvironment, window }) => {
+  test('Can install app', async ({ installWizard, installedApp, serverStart, testEnvironment }) => {
     test.slow();
 
     await installWizard.clickGetStarted();
@@ -33,7 +33,6 @@ test.describe('Install App', () => {
 
     // Confirm post-install app state is as expected
     await expect(installedApp.firstTimeTemplateWorkflowText).toBeVisible({ timeout: 30 * 1000 });
-    const templatesGrid = window.getByTestId('template-workflows-content');
-    await expect(window).toHaveScreenshot('installApp.png', { mask: [templatesGrid] });
+    await expect(installedApp.templatesGrid).toBeVisible({ timeout: 30 * 1000 });
   });
 });

tests/integration/testInstalledApp.ts

@@ -9,6 +9,7 @@ export class TestInstalledApp {
   readonly uiBlockedSpinner;
 
   readonly firstTimeTemplateWorkflowText;
+  readonly templatesGrid;
 
   constructor(readonly window: Page) {
     this.graphCanvas = new TestGraphCanvas(window);
@@ -17,6 +18,7 @@ export class TestInstalledApp {
 
     // Use canvas container as a stable readiness indicator instead of text
     this.firstTimeTemplateWorkflowText = this.graphCanvas.canvasContainer;
+    this.templatesGrid = this.window.getByTestId('template-workflows-content');
   }
 
   /** Waits until the app is completely loaded. */