The `show` scope (all|watched|in_progress|unwatched) filter and the status CASE
were hand-duplicated between unified_library (the grid) and facets.wsq — the
exact drift risk the review flagged (a hidden movie kept out of the grid must
not inflate facets). Extract them into four shared query.py helpers
(movie_status_case, show_status_case, apply_movie_state_filter,
apply_show_state_filter), model-agnostic (callers pass the joined state
expressions), and point all three call sites at them.
Pure behaviour-equivalence refactor: browse.py -67 lines, no query changes.
Green under the E3 S1 parity net + query_conversion/facets/field-scoped/lang
tests (348 DB-lane pass, ruff clean).
peter
9bf7da2cbe