Create modal: expiration inputs default to 30 days and 10 versions
instead of empty, so toggling versioning on surfaces a policy that's
ready to save. Clearing a field still removes that condition from the
policy.
Edit modal: same defaults, but only when the bucket has never had
versioning enabled — buckets already versioned keep their existing
values (including explicit null == "no limit on this condition"), so
the modal never silently retro-adds a condition the user removed.
Claude
eb64004f4c