An empty tradeOptions array meant two different things: "facets query still in
flight" and "vocabulary genuinely unavailable". Both enabled fail-open free
text and showed the outage warning, so a normal cold fetch looked like an
outage. Anything committed in that window was added to knownTradesRef and stayed
selectable after the canonical list arrived, permanently undermining the gate.
Expose the facets query isLoading as tradesLoading, thread it to the field as
tradeOptionsLoading, and keep the canonical gate active while loading. The
outage warning now shows only once the query has settled empty.
* feat(vendors): align directory UI with prototype
* fix(vendors): report the filtered total
* fix(vendors): keep company input in sync
* fix(vendors): scope facets to directory status
