Soft-marked rows used to disappear from /photos globally, including
from a library-scoped view that didn't contain the survivor at all.
A user browsing lib A who'd promoted a file from lib B as the
survivor would silently lose visibility on their own copy in lib A,
even though lib B's file isn't reachable from lib A's view.
Library-scoped queries now keep a demoted row visible when its
survivor lives in a library outside the current scope. Implemented
as a NOT EXISTS subquery against the same image_exif table aliased
as `survivor`. The unscoped (all-libraries) view is unchanged — every
survivor is reachable, so demoted rows stay hidden as before.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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