Preserve Basic shared arrival reactions through Semuta

Admit the original ordered Ecaz/Moritani entry in bare Basic Richese games, retain both native opportunities during fresh discard recovery, and bind each suspended child to its actual arrival. Show the current discard response in the table banner.

Cover real five-seat setup and placements, both owner orders, physical payouts/draws/gifts, persistent controls and minimal legal bot participation.

game/engine.ts

@@ -142,7 +142,7 @@ import {
 } from './homeworld-revival-return';
 import { homeworldRevivalDestinations, quoteHomeworldRevivalDestination } from './homeworld-revival-destinations';
 import { terrorEntrySignature, terrorSelectionSignature, validateTerrorEntrySignature } from './terror-entry-receipt';
-import { arrivalOverlapSignature, overlapOwnsWormTerror } from './arrival-overlap';
+import { arrivalOverlapSignature, overlapOwnsAmbassadorDiscard, overlapOwnsTerrorDiscard, overlapOwnsWormTerror } from './arrival-overlap';
 import {
   homeworldLowBonus,
   homeworldRevivalKaramaBlock,
@@ -7551,7 +7551,7 @@ function treacheryDiscardIntegrity(g: Game) {
 }
 /** Bounded public single-card reaction after completed effects. Battle cleanup
  * preserves the original winner queue and bounded native retention/rewards without replaying them.
- * Final flight arrival may resume native Intrusion, but other entry responses remain gated. */
+ * Basic ordinary entry discards retain their ordered Ambassador/Terror parent. */
 function semutaOfferSupported(
   g: Game,
   continuation: NonNullable<Game['pendingTreacheryDiscard']>['continuation'],
@@ -7569,7 +7569,8 @@ function semutaOfferSupported(
       continuation.entry.victoryEvent || continuation.entry.relocation ||
       continuation.entry.shipmentReceipt || continuation.entry.purchaseReceipt ||
       continuation.entry.revivalReceipt || continuation.entry.nexusPurchase ||
-      g.pendingArrivalOverlap || g.pendingArrivalReaction?.length ||
+      (g.pendingArrivalOverlap && !overlapOwnsAmbassadorDiscard(g, continuation.entry)) ||
+      g.pendingArrivalReaction?.length ||
       g.pendingChoamMove || g.pendingIxMove || g.pendingFremenMove ||
       g.ornithopter || g.summonedWorm || g.wormRides.length > 0 ||
       g.pendingRevival)) return false;
@@ -7683,7 +7684,9 @@ function semutaOfferSupported(
   if (continuation.kind === 'terrorDiscard' &&
     (continuation.entry.resume !== 'none' ||
       (continuation.entry.cause !== 'shipment' && continuation.entry.cause !== 'movement') ||
-      g.pendingArrivalOverlap || g.pendingChoamMove || g.pendingIxMove ||
+      (g.pendingArrivalOverlap && (!bareBasicSemutaProfile(g) ||
+        !overlapOwnsTerrorDiscard(g, continuation.entry, continuation.owner))) ||
+      g.pendingChoamMove || g.pendingIxMove ||
       g.pendingFremenMove || g.ornithopter || g.summonedWorm ||
       g.wormRides.length > 0)) return false;
   if ((continuation.kind === 'distransDiscard' ||
@@ -17242,6 +17245,7 @@ function ambassadorEffectBlock(
   return null;
 }
 function arrivalOverlapModeSupported(g: Game): boolean {
+  if (bareBasicSemutaProfile(g) && byFaction(g, 'ecaz') && byFaction(g, 'moritani')) return true;
   if ((independentNexusProfile(g) || independentDiscoveryProfile(g)) && byFaction(g, 'ecaz') && byFaction(g, 'moritani')) return true;
   if ((mixedE3NexusLeaderSkillsProfile(g) || mixedE3NexusProfile(g)) &&
     byFaction(g, 'ecaz') && byFaction(g, 'moritani')) return true;