Replace fixed waits with waitForAngular in UI tests

The 3s waitForTimeout after page.goto wasn't enough for Angular to
bootstrap and render content. Replace with waitForAngular() helper
that waits for actual DOM elements (nav, headings) up to 15s, with
5s fallback.

32 calls updated across 10 test files.

Also adds waitForAngular to helpers.ts export.

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

src/Web/StellaOps.Web/tests/e2e/integrations/integrations.e2e.spec.ts

@@ -19,6 +19,7 @@
 
 import { execSync } from 'child_process';
 import { test, expect } from './live-auth.fixture';
+import { waitForAngular } from './helpers';
 
 const SCREENSHOT_DIR = 'e2e/screenshots/integrations';
 const BASE = process.env['PLAYWRIGHT_BASE_URL'] || 'https://stella-ops.local';
@@ -620,7 +621,7 @@ test.describe('Integration Services — UI Verification', () => {
   test('landing page redirects to first populated tab or shows onboarding', async ({ liveAuthPage: page }) => {
     await page.goto(`${BASE}/setup/integrations`, { waitUntil: 'domcontentloaded', timeout: 45_000 });
     await page.waitForLoadState('domcontentloaded');
-    await page.waitForTimeout(3_000);
+    await waitForAngular(page);
 
     const url = page.url();
     // Should either redirect to a tab (registries/scm/ci) or show onboarding