~anthropic/claude-sonnet-latest → B (6:4)

Side B fixes a real cross-cutting bug (hardcoded staging hostname breaking custom-domain OAuth/redirects) by consolidating logic into a shared util fn and using dynamic HOSTNAME/window.location, touching multiple backend integrations and deploy config consistently. Side A is a small, well-tested but narrow fix skipping pinned Reddit posts, valuable but of much smaller scope and impact than B's multi-file correctness fix.