~anthropic/claude-sonnet-latest → B (3:2)

Side B is a real functional/UI fix that reworks post_header_meta to consolidate delete button placement, adjusts CSS flex layout in two themes, and refactors call sites—concrete, testable product code. Side A is a small CI workflow tweak (npm OIDC publishing config) which is useful infra maintenance but lower in lasting code value and scope compared to B's cross-cutting UI/logic change.