Upgrade waitForAngular to wait for route content, fix remaining UI tests

The generic waitForAngular matched the sidebar nav immediately but
route content (tables, tabs, forms) hadn't rendered yet.

Updated waitForAngular selector to wait for route-level elements:
stella-page-tabs, .integration-list, .source-catalog, table tbody tr,
h1, [role=tablist], .detail-grid, .wizard-step, form.

Also fixed activity-timeline and pagination tests (still had
waitForTimeout(2_000) instead of waitForAngular).

Increased fallback timeout from 5s to 8s for slow-loading pages.

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

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

@@ -16,6 +16,7 @@ import { test, expect } from './live-auth.fixture';
 import {
   INTEGRATION_CONFIGS,
   createIntegrationViaApi,
+  waitForAngular,
   cleanupIntegrations,
   snap,
 } from './helpers';
@@ -131,10 +132,10 @@ test.describe('Pagination — API', () => {
 test.describe('Pagination — UI Pager', () => {
   test('pager info renders on registries tab', async ({ liveAuthPage: page }) => {
     await page.goto(`${BASE}/setup/integrations/registries`, {
-      waitUntil: 'networkidle',
-      timeout: 30_000,
+      waitUntil: 'domcontentloaded',
+      timeout: 45_000,
     });
-    await page.waitForTimeout(2_000);
+    await waitForAngular(page);
 
     // The pager should show "X total · page Y of Z"
     const pagerInfo = page.locator('.pager__info');
@@ -151,10 +152,10 @@ test.describe('Pagination — UI Pager', () => {
 
   test('pager controls are present', async ({ liveAuthPage: page }) => {
     await page.goto(`${BASE}/setup/integrations/registries`, {
-      waitUntil: 'networkidle',
-      timeout: 30_000,
+      waitUntil: 'domcontentloaded',
+      timeout: 45_000,
     });
-    await page.waitForTimeout(2_000);
+    await waitForAngular(page);
 
     // Check for pagination navigation
     const pager = page.locator('.pager');