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/vault-consul-secrets.e2e.spec.ts

@@ -20,6 +20,7 @@ import {
   createIntegrationViaApi,
   cleanupIntegrations,
   snap,
+  waitForAngular,
 } from './helpers';
 
 const BASE = process.env['PLAYWRIGHT_BASE_URL'] || 'https://stella-ops.local';
@@ -172,7 +173,7 @@ test.describe('Secrets Integration — UI Verification', () => {
     createdIds.push(vaultId, consulId);
 
     await page.goto(`${BASE}/setup/integrations/secrets`, { waitUntil: 'domcontentloaded', timeout: 45_000 });
-    await page.waitForTimeout(3_000);
+    await waitForAngular(page);
 
     // Verify the page loaded with the correct heading
     const heading = page.getByRole('heading', { name: /secrets/i });
@@ -193,7 +194,7 @@ test.describe('Secrets Integration — UI Verification', () => {
         waitUntil: 'domcontentloaded',
         timeout: 45_000,
       });
-      await page.waitForTimeout(3_000);
+      await waitForAngular(page);
 
       // Verify detail page loaded — should show integration name
       const pageContent = await page.textContent('body');