Chore: Testing: Fix chat panel test failure (#16078)

packages/app-desktop/integration-tests/wcag.spec.ts

@@ -124,6 +124,8 @@ test.describe('wcag', () => {
 		await mainScreen.chatPanel.open(electronApp);
 
 		await mainScreen.chatPanel.sendMessage('/reply-with test');
+		await mainScreen.chatPanel.waitForMessageCount(2);
+
 		await mainScreen.chatPanel.sendMessage(
 			'/tool editor.appendToNote {"text": "test"}\n/reply-with done',
 		);