Connect Emperor Nexus retention to original Richese seller lots

components/game-table.tsx

@@ -237,6 +237,7 @@ import { MoritaniAssassinate, MoritaniAssassinateHistory } from './moritani-assa
 import { MoritaniExtortion, MoritaniExtortionNotice } from './moritani-extortion';
 import { AdvancedAllySeparation } from './advanced-ally-separation';
 import { NexusEmperorPayment } from './nexus-emperor-payment';
+import { NexusEmperorSellerPurchase } from './nexus-emperor-seller-purchase';
 export function GameTable({
   game: g,
   send,
@@ -3514,6 +3515,8 @@ export function GameTable({
                 </>
               ) : g.decision.kind === 'nexusEmperorPayment' ? (
                 <NexusEmperorPayment game={g} send={act} busy={transportBusy || !!g.roomControl?.paused || !!g.roomControl?.closed || !!me.autopilot} />
+              ) : g.decision.kind === 'nexusEmperorSellerPurchase' ? (
+                <NexusEmperorSellerPurchase game={g} act={act} busy={transportBusy || !!g.roomControl?.paused || !!g.roomControl?.closed || !!me.autopilot} />
               ) : g.decision.kind === 'auctionPayment' ? (
                 <>
                   <p className="muted">

components/nexus-emperor-seller-purchase.tsx

@@ -0,0 +1,47 @@
+'use client';
+
+import type { Action, GameView } from '@/game/engine';
+import { Button } from './ui/button';
+
+export function NexusEmperorSellerPurchase({ game, act, busy }: {
+  game: GameView;
+  act: (action: Action) => void;
+  busy: boolean;
+}) {
+  const decision = game.decision;
+  if (decision?.kind !== 'nexusEmperorSellerPurchase' || decision.player !== game.me) return null;
+  const own = game.players.find(player => player.id === game.me);
+  const offer = game.nexusEmperorSellerPurchase;
+  const seller = offer && game.players.find(player => player.id === offer.seller);
+  const disabled = busy || game.status !== 'playing' || game.phase !== 3 ||
+    game.automaticContinuationPending || !!game.phaseOpening || !!game.response ||
+    !!game.truthtrance || !!game.nexusTraitors?.pending ||
+    !!game.roomControl?.paused || !!game.roomControl?.closed || !!own?.autopilot;
+  const entitled = !!offer && offer.event === decision.event && offer.canUse && !offer.blocked;
+
+  return (
+    <section aria-label="Richese purchase confirmation" className="notice min-w-0 space-y-3 break-words">
+      <h3>Confirm your winning purchase</h3>
+      <p>Pay the original winning price to complete this Treachery Card purchase.
+        This confirmation does not change the winning lot or bid.</p>
+      {offer && <>
+        <h4>Emperor Nexus · Secret Ally</h4>
+        <p>The original {offer.source === 'cache' ? 'Richese cache' : 'Black Market'} price is
+          {' '}{offer.price} spice. Show that you personally hold the full amount to keep your spice
+          while acquiring the original card.</p>
+        <p className="fine">Provisional seller policy, not a publisher ruling:
+          {' '}{seller?.name ?? offer.seller} remains unpaid. No bank reimbursement or substitute
+          payer is created. {offer.policy} Using this option spends your Emperor Nexus Card.</p>
+        {offer.blocked && <output className="fine block">{offer.blocked}</output>}
+      </>}
+      <Button className="game-action min-h-11 whitespace-normal" disabled={disabled}
+        onClick={() => { if (!disabled) act({ type: 'nexusEmperorSellerPurchase', event: decision.event, use: false }); }}>
+        Pay original winning price
+      </Button>
+      {offer && entitled && <Button className="game-action min-h-11 whitespace-normal" disabled={disabled}
+        onClick={() => { if (!disabled && entitled) act({ type: 'nexusEmperorSellerPurchase', event: decision.event, use: true }); }}>
+        Use Emperor Nexus · keep {offer.price} spice; seller unpaid
+      </Button>}
+    </section>
+  );
+}