CI's e2e run confirmed the real cause: SourcesSection renders near the
bottom of /parametres/foyer (after name, invite code, members), inside
.app-content's own scrollable region — a bare `.should("be.visible")`
doesn't auto-scroll (only interaction commands like `.click()`/`.check()`
do), so the checkbox row was still clipped by that container's overflow
when the assertion ran. Adds a dedicated "I scroll to the section" step
and uses it before the sources-section assertions in household-settings.feature.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>