Connect battle rewards to campaign equipment

src/game/data/battleItems.ts

@@ -239,10 +239,28 @@ export const itemCatalog: Record<string, ItemDefinition> = {
   }
 };
 
+export const itemCatalogEntries = Object.values(itemCatalog);
+
 export function getItem(itemId: string) {
   return itemCatalog[itemId] ?? itemCatalog['training-sword'];
 }
 
+export function findItemByName(name: string) {
+  return itemCatalogEntries.find((item) => item.name === name);
+}
+
+export function itemInventoryLabel(itemId: string) {
+  return getItem(itemId).name;
+}
+
+export function equipmentItemIdForInventoryLabel(label: string) {
+  return findItemByName(label)?.id;
+}
+
+export function isEquipmentInventoryLabel(label: string) {
+  return Boolean(findItemByName(label));
+}
+
 export function equipmentExpToNext(level: number) {
   return 50 + Math.min(level, 9) * 20;
 }