Recover saves with malformed battle reports

scripts/verify-campaign-save-normalization.mjs

@@ -117,6 +117,29 @@ try {
   assert(invalidStep.step === 'new', `Expected unknown campaign step to reset safely: ${JSON.stringify(invalidStep)}`);
   assert(invalidStep.gold === 90, `Expected unknown-step save to keep harmless economy data: ${JSON.stringify(invalidStep)}`);
 
+  storage.clear();
+  storage.set(
+    campaignStorageKey,
+    JSON.stringify({
+      version: 1,
+      updatedAt: '2026-07-04T00:00:00.000Z',
+      step: 'fourth-camp',
+      activeSaveSlot: 1,
+      gold: 320,
+      firstBattleReport: {
+        battleId: 'first-battle-zhuo-commandery',
+        outcome: 'victory',
+        completedCampVisits: { corrupted: true }
+      }
+    })
+  );
+  const malformedReport = loadCampaignState();
+  assert(
+    malformedReport.step === 'fourth-camp' && malformedReport.gold === 320,
+    `Expected malformed report to be dropped without losing campaign progress: ${JSON.stringify(malformedReport)}`
+  );
+  assert(malformedReport.firstBattleReport === undefined, `Expected malformed report to be discarded: ${JSON.stringify(malformedReport)}`);
+
   storage.clear();
   storage.set(campaignStorageKey, JSON.stringify({ version: 99, step: 'sixty-sixth-camp' }));
   const unsupported = loadCampaignState();
@@ -137,7 +160,7 @@ 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 recovery, unsupported-version rejection, and slotted fallback.');
+  console.log('Verified campaign save normalization, malformed-field recovery, unknown-step and report recovery, unsupported-version rejection, and slotted fallback.');
 } finally {
   await server.close();
 }

src/game/state/campaignState.ts

@@ -812,11 +812,7 @@ function normalizeCampaignState(state: Partial<CampaignState>): CampaignState {
   normalized.sortieItemAssignments = normalizeSortieItemAssignments(recordOrEmpty(normalized.sortieItemAssignments));
   normalized.reserveTrainingFocus = normalizeReserveTrainingFocusId(normalized.reserveTrainingFocus);
   normalized.battleHistory = recordOrEmpty<CampaignBattleSettlement>(normalized.battleHistory);
-  if (isPlainObject(normalized.firstBattleReport)) {
-    normalized.firstBattleReport = cloneReport(normalized.firstBattleReport);
-  } else {
-    normalized.firstBattleReport = undefined;
-  }
+  normalized.firstBattleReport = normalizeFirstBattleReport(normalized.firstBattleReport);
   return normalized;
 }
 
@@ -878,6 +874,18 @@ function normalizeCampaignStep(step: unknown): CampaignStep {
   return typeof step === 'string' && campaignStepIds.has(step as CampaignStep) ? step as CampaignStep : 'new';
 }
 
+function normalizeFirstBattleReport(report: unknown): FirstBattleReport | undefined {
+  if (!isPlainObject(report)) {
+    return undefined;
+  }
+
+  try {
+    return cloneReport(report as FirstBattleReport);
+  } catch {
+    return undefined;
+  }
+}
+
 function reserveTrainingFocusDefinition(focusId?: string) {
   const normalizedId = normalizeReserveTrainingFocusId(focusId);
   return campaignReserveTrainingFocusDefinitions.find((focus) => focus.id === normalizedId) ?? campaignReserveTrainingFocusDefinitions[0];