Integrate CHOAM Nexus Cunning Kull with source-aware costs

components/nexus-cards.tsx

@@ -120,7 +120,7 @@ export function NexusCards({ game, act, busy }: { game: GameView; act: (action:
       <div>
         <h3>Nexus cards</h3>
         <p className="fine">{offer.deckCount} in deck · {offer.discardCount} discarded · {Object.values(offer.held).filter((held) => held === true).length} held</p>
-        <p>Playable effects include Atreides inspections, Harkonnen exchanges, and Tleilaxu, Ixian, Bene Gesserit, Emperor, CHOAM, Moritani and bounded Ecaz Duke Cunning, plus Emperor Secret Ally’s bank-auction purchase and three extra free revivals, Fremen Secret Ally’s ordinary three free revivals, Richese Secret Ally reserve shipping and Guild Cunning’s second shipment or absent-Guild Secret Ally shipping. Use the controls shown at each effect’s timing. CHOAM’s Kull Wahad effect, Moritani Cunning relocation and Grumman combinations, and other unfinished effects remain unavailable.</p>
+        <p>Playable effects include Atreides inspections, Harkonnen exchanges, and Tleilaxu, Ixian, Bene Gesserit, Emperor, CHOAM, Moritani and bounded Ecaz Duke Cunning, plus Emperor Secret Ally’s bank-auction purchase and three extra free revivals, Fremen Secret Ally’s ordinary three free revivals, Richese Secret Ally reserve shipping and Guild Cunning’s second shipment or absent-Guild Secret Ally shipping. Use the controls shown at each effect’s timing. {game.nexusKullPreview ? 'CHOAM Nexus Kull is reactive: choose its fuel at the Karama opportunity.' : 'CHOAM Nexus Kull is unavailable outside its explicit preview.'} Moritani Cunning relocation and Grumman combinations, and other unfinished effects remain unavailable.</p>
       </div>
       {game.nexusAtreides && offer.card === 'atreides' && (
         <div aria-label="Atreides Nexus effect" className="space-y-2">