Fix incorrect map coordinates for copy-pasted NPC & item spawns

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- Copy-pasted NPC and item spawns had incorrect map coordinates.
+
 ## [1.2.0] - 2024-01-11
 
 ### Added

src/core/state/entity-state.js

@@ -45,12 +45,24 @@ export class EntityState {
   withX(x) {
     let copy = this.copy();
     copy.x = x;
+    for (let npc of copy.npcs) {
+      npc.x = x;
+    }
+    for (let item of copy.items) {
+      item.x = x;
+    }
     return copy;
   }
 
   withY(y) {
     let copy = this.copy();
     copy.y = y;
+    for (let npc of copy.npcs) {
+      npc.y = y;
+    }
+    for (let item of copy.items) {
+      item.y = y;
+    }
     return copy;
   }