useMarketplaceConfiguration: lift the marketplace config self-fetch

MarketplacePostOfferView was both *the* fetcher and the listener for
MarketplaceConfigurationEvent — it dispatched
GetMarketplaceConfigurationMessageComposer from one effect when item
was set, then routed the response through setCatalogOptions.

useCatalog never touched the field; it was passing through catalogOptions
purely as a transport mechanism for this single component to talk to
itself. Replace with useMarketplaceConfiguration() — staleTime Infinity
(server-side constants for a session), enabled on item, single tidy
data path.

Drops marketplaceConfiguration from ICatalogOptions; with petPalettes
out too, ICatalogOptions is now just { clubGifts }. clubGifts is the
last one and needs invalidation (server pushes ClubGiftInfoEvent after
SelectClubGiftComposer) so it stays put until useNitroEventInvalidator
companion lands.

src/hooks/catalog/index.ts

@@ -4,4 +4,5 @@ export * from './useCatalogPlaceMultipleItems';
 export * from './useCatalogSkipPurchaseConfirmation';
 export * from './useClubOffers';
 export * from './useGiftConfiguration';
+export * from './useMarketplaceConfiguration';
 export * from './useSellablePetPalette';

src/hooks/catalog/useMarketplaceConfiguration.ts

@@ -0,0 +1,28 @@
+import { GetMarketplaceConfigurationMessageComposer, MarketplaceConfigurationEvent, MarketplaceConfigurationMessageParser } from '@nitrots/nitro-renderer';
+import { UseQueryResult } from '@tanstack/react-query';
+import { useNitroQuery } from '../../api/nitro-query';
+
+/**
+ * Marketplace configuration (commission rates, min/max ask, etc.) as
+ * returned by GetMarketplaceConfigurationMessageComposer →
+ * MarketplaceConfigurationEvent. Cached at session level — the values
+ * are server-side constants for the duration of a session.
+ *
+ * Replaces the previous pattern where MarketplacePostOfferView
+ * stuffed the parser into catalogOptions.marketplaceConfiguration
+ * via setCatalogOptions inside its own listener, and dispatched
+ * GetMarketplaceConfigurationMessageComposer from an effect that
+ * checked the same field as the cache. With useNitroQuery, the cache
+ * is React Query's; the component just reads `data`.
+ */
+export const useMarketplaceConfiguration = (
+    options: { enabled?: boolean } = {}
+): UseQueryResult<MarketplaceConfigurationMessageParser> =>
+    useNitroQuery<MarketplaceConfigurationEvent, MarketplaceConfigurationMessageParser>({
+        key: [ 'nitro', 'catalog', 'marketplaceConfiguration' ],
+        request: () => new GetMarketplaceConfigurationMessageComposer(),
+        parser: MarketplaceConfigurationEvent,
+        select: event => event.getParser(),
+        enabled: options.enabled,
+        staleTime: Infinity
+    });