Sequential CI steps leave the runner under heavier load than the parallel task check approach, so the E2E test can legitimately take 4-5 min. Raise timeout 300→600 in integration_ui_test.sh and step timeout 6→12 min. Job-level ceiling raised to 30 min to match. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>