fix: E2E test stability and UI performance improvements (#823)

apps/ui/tests/features/success-log-contrast.spec.ts

@@ -13,6 +13,7 @@ import {
   waitForNetworkIdle,
   authenticateForTests,
   handleLoginScreenIfPresent,
+  dismissSandboxWarningIfVisible,
 } from '../utils';
 
 /**
@@ -109,6 +110,9 @@ test.describe('Success log output contrast', () => {
 
     await expect(page.locator('[data-testid="board-view"]')).toBeVisible({ timeout: 10000 });
 
+    // Dismiss sandbox warning dialog if it appears (blocks pointer events)
+    await dismissSandboxWarningIfVisible(page);
+
     // Wait for the verified feature card to appear
     const featureCard = page.locator(`[data-testid="kanban-card-${featureId}"]`);
     await expect(featureCard).toBeVisible({ timeout: 10000 });