Fix Grumman stack placement cancellation and inventory validation

game/engine.ts

@@ -14484,6 +14484,17 @@ function finishResponse(g: Game, canceled: boolean) {
   if (response.kind === 'nexusPrescience') validateNexusInspectionResponse(g, response);
   if (response.kind === 'nexusAdvisorFlip') validateNexusAdvisorResponse(g, response);
   if (response.kind === 'nexusSardaukar') validateNexusSardaukarResponse(g, response);
+  if (response.kind === 'moritaniPlacement') {
+    // Both outcomes need the same physical inventory and declared source.
+    // This detached denial quote is only validation here; allowance still
+    // executes placeTerror and checks current placement feasibility below.
+    try {
+      quotePlacementCancellation(g, response);
+    } catch (error) {
+      if (error instanceof PlacementCancellationError) throw new RuleError(error.message);
+      throw error;
+    }
+  }
   const ecazCollectionQuote =
     response.kind === 'ecazCollection'
       ? currentEcazCollectionQuote(g, response, canceled)

game/placement-cancellation.ts

@@ -154,13 +154,9 @@ export function quotePlacementCancellation(
         TERROR_STRONGHOLDS.includes(pending.territory),
       'No current physical Terror placement is awaiting cancellation.',
     );
-    const locations = state.tokens
-      .filter((t) => t.status === 'placed')
-      .map((t) => t.location);
-    requirePlacement(
-      new Set(locations).size === locations.length,
-      'Placed Terror markers need distinct strongholds.',
-    );
+    // Grumman may have created legal stacks earlier. Denial validates physical
+    // custody and the pending source receipt, not whether that placement could
+    // still succeed: no token moves, even if its source or target has changed.
     return {
       kind: 'moritaniPlacement',
       terror: {