Normalize malformed battle history saves

scripts/verify-campaign-save-normalization.mjs

@@ -140,6 +140,49 @@ try {
   );
   assert(malformedReport.firstBattleReport === undefined, `Expected malformed report to be discarded: ${JSON.stringify(malformedReport)}`);
 
+  storage.clear();
+  storage.set(
+    campaignStorageKey,
+    JSON.stringify({
+      version: 1,
+      updatedAt: '2026-07-04T01:00:00.000Z',
+      step: 'fifth-camp',
+      battleHistory: {
+        'first-battle-zhuo-commandery': {
+          battleId: 'first-battle-zhuo-commandery',
+          battleTitle: 'Zhuo Commandery',
+          outcome: 'victory',
+          rewardGold: '120',
+          itemRewards: ['Bean', 12, 'Bean'],
+          campaignRewards: {
+            supplies: { corrupted: true },
+            equipment: ['Iron Sword'],
+            reputation: 'Fame',
+            recruits: [{ unitId: 'test-recruit', name: 'Test Recruit' }, { broken: true }],
+            unlocks: { corrupted: true }
+          },
+          objectives: [],
+          units: [],
+          bonds: [],
+          completedAt: '2026-07-04T01:00:00.000Z'
+        },
+        corrupted: 'not-a-settlement'
+      }
+    })
+  );
+  const malformedHistory = loadCampaignState();
+  assert(
+    Object.keys(malformedHistory.battleHistory).length === 1 &&
+      malformedHistory.battleHistory['first-battle-zhuo-commandery']?.rewardGold === 120,
+    `Expected malformed battle history entries to be filtered while keeping valid settlements: ${JSON.stringify(malformedHistory)}`
+  );
+  assert(
+    malformedHistory.battleHistory['first-battle-zhuo-commandery']?.itemRewards.length === 1 &&
+      malformedHistory.battleHistory['first-battle-zhuo-commandery']?.campaignRewards?.equipment[0] === 'Iron Sword' &&
+      malformedHistory.battleHistory['first-battle-zhuo-commandery']?.campaignRewards?.recruits.length === 1,
+    `Expected nested battle history rewards to normalize: ${JSON.stringify(malformedHistory)}`
+  );
+
   storage.clear();
   storage.set(campaignStorageKey, JSON.stringify({ version: 99, step: 'sixty-sixth-camp' }));
   const unsupported = loadCampaignState();
@@ -160,7 +203,7 @@ try {
   const fallback = loadCampaignState();
   assert(fallback.step === 'second-camp' && fallback.activeSaveSlot === 2, `Expected valid slotted save fallback: ${JSON.stringify(fallback)}`);
 
-  console.log('Verified campaign save normalization, malformed-field recovery, unknown-step and report recovery, unsupported-version rejection, and slotted fallback.');
+  console.log('Verified campaign save normalization, malformed-field recovery, unknown-step/report/history recovery, unsupported-version rejection, and slotted fallback.');
 } finally {
   await server.close();
 }