Fix shared preview redirecting to admin for an ordinary new drafterdgeist-revive-events

superseded/currently_public used published_at presence as a proxy
for page-row relevance, but published_at is carried forward onto
every new draft descended from previously-published content
(Page#clone_attributes_from, Node#save_draft!) -- so it read true
for any draft on an already-published node, whether or not that
specific draft had ever gone live itself. Compare draft_id/head_id
identity directly instead; no timestamp involved. A stale
(superseded) link now redirects to the live public page rather than
an admin URL an anonymous holder can't reach anyway.

0 files changed, 0 insertions, 0 deletions