Limit battle save item stocks

scripts/verify-battle-save-normalization.mjs

@@ -85,6 +85,7 @@ try {
     ['invalid max-level bond exp threshold', { bonds: [{ ...validState.bonds[0], level: 100, exp: 101 }] }],
     ['invalid bond battle exp', { bonds: [{ ...validState.bonds[0], battleExp: 1.5 }] }],
     ['invalid item stock count', { itemStocks: { 'liu-bei': { bean: -1 } } }],
+    ['too many item stock count', { itemStocks: { 'liu-bei': { bean: 4, wine: 2 } } }],
     ['unknown item stock unit id', { itemStocks: { 'ghost-unit': { bean: 1 } } }],
     ['unknown item stock item id', { itemStocks: { 'liu-bei': { phantomItem: 1 } } }],
     ['invalid buff turns', { battleBuffs: [{ ...validState.battleBuffs[0], turns: 0 }] }],

src/game/state/battleSaveState.ts

@@ -86,7 +86,13 @@ const maxBattleLogEntryLength = 96;
 const maxBattleBondEntries = 128;
 const maxTriggeredBattleEventLength = 96;
 const defaultBattleSaveArrayLimit = 128;
+const defaultBattleItemStockLimit = 9;
 const maxStatusKindsPerUnit = 2;
+const maxBattleItemStockById: Record<string, number> = {
+  bean: 3,
+  salve: 2,
+  wine: 1
+};
 
 export function normalizeBattleSaveSlot(slot: number, slotCount: number) {
   const safeSlot = Number.isFinite(slot) ? Math.floor(slot) : 1;
@@ -367,11 +373,15 @@ function isOptionalItemStockRecord(value: unknown, options: BattleSaveValidation
       Object.keys(stocks).length <= itemReferenceLimit(options) &&
       Object.entries(stocks).every(
         ([itemId, count]) =>
-          (!options.validItemIds || options.validItemIds.has(itemId)) && Number.isInteger(count) && Number(count) >= 0
+          (!options.validItemIds || options.validItemIds.has(itemId)) && isValidItemStockCount(itemId, count)
       )
   );
 }
 
+function isValidItemStockCount(itemId: string, count: unknown) {
+  return Number.isInteger(count) && Number(count) >= 0 && Number(count) <= (maxBattleItemStockById[itemId] ?? defaultBattleItemStockLimit);
+}
+
 function isOptionalBuffArray(value: unknown, options: BattleSaveValidationOptions) {
   return (
     value === undefined ||