v1.28.1

Fixed

• _is_welcome_fallback no longer fires on sites with a non-default
  custom theme. The detector previously checked only home_page_id
  • published-post_index presence, missing the case where a theme's
    resolve_home hookspec owns / (e.g. bragi-theme-zelda's pause-menu
    inventory page). The bad UX was self-inflicted: an
    action_required-dismissible=False notice that the operator could
    not hide. A heuristic suppress on non-default site.theme ships as
    the v1.28.1 band-aid; the proper fix in v1.29.0 adds a new
    claims_root_route hookspec for themes/plugins to opt in
    declaratively. Closes #389.