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>