Ignore malformed campaign reward labels

src/game/state/campaignState.ts

@@ -1399,7 +1399,12 @@ function createBattleSettlement(report: FirstBattleReport, reserveTraining: Camp
 
 function applyRewardDelta(inventory: Record<string, number>, rewards: string[], direction: 1 | -1) {
   return rewards.reduce<Record<string, number>>((nextInventory, reward) => {
-    const { label, amount } = parseRewardLabel(reward);
+    const parsed = parseRewardLabel(reward);
+    if (!parsed) {
+      return nextInventory;
+    }
+
+    const { label, amount } = parsed;
     const nextAmount = Math.max(0, (nextInventory[label] ?? 0) + amount * direction);
     const cap = direction === 1 ? campaignInventoryCaps[label] : undefined;
     nextInventory[label] = cap ? Math.min(nextAmount, cap) : nextAmount;
@@ -1488,16 +1493,23 @@ function advanceReserveEquipment(unit: UnitData, amount: number) {
 
 function parseRewardLabel(reward: string) {
   const normalized = reward.replace(/\s+/g, ' ').trim();
-  const match = normalized.match(/^(.*?)(?:\s*[+xX]?\s*(\d+))$/);
+  if (!normalized) {
+    return undefined;
+  }
+
+  const match = normalized.match(/^(.*?)(?:\s*([+xX-]?)\s*(\d+))$/);
 
   if (!match) {
     return { label: normalized, amount: 1 };
   }
 
-  return {
-    label: match[1].trim() || normalized,
-    amount: Number(match[2] ?? 1)
-  };
+  const amount = Number(match[3] ?? 1) * (match[2] === '-' ? -1 : 1);
+  const label = match[1].trim();
+  if (!label || !Number.isSafeInteger(amount) || amount <= 0) {
+    return undefined;
+  }
+
+  return { label, amount };
 }
 
 function cloneCampaignState(state: CampaignState): CampaignState {