Restrict battle save attack intents

src/game/state/battleSaveState.ts

@@ -73,6 +73,8 @@ type BattleSaveValidationOptions = {
   mapWidth?: number;
   mapHeight?: number;
   validUnitIds?: ReadonlySet<string>;
+  validAllyUnitIds?: ReadonlySet<string>;
+  validEnemyUnitIds?: ReadonlySet<string>;
   validUsableIds?: ReadonlySet<string>;
   validItemIds?: ReadonlySet<string>;
   validEquipmentItemIds?: ReadonlySet<string>;
@@ -159,7 +161,7 @@ export function isValidBattleSaveState(state: unknown, options: BattleSaveValida
     return false;
   }
 
-  if (!areAttackIntentsTargetingLiveUnits(attackIntents, units)) {
+  if (!areAttackIntentsTargetingLiveUnits(attackIntents, units, options)) {
     return false;
   }
 
@@ -281,9 +283,19 @@ function areSavedBattleUnitsValid(units: unknown[], options: BattleSaveValidatio
   return [...seenUnitIds].every((unitId) => options.validUnitIds?.has(unitId));
 }
 
-function areAttackIntentsTargetingLiveUnits(attackIntents: BattleSaveAttackIntent[], units: SavedBattleUnitState[]) {
+function areAttackIntentsTargetingLiveUnits(
+  attackIntents: BattleSaveAttackIntent[],
+  units: SavedBattleUnitState[],
+  options: BattleSaveValidationOptions
+) {
   const liveUnitIds = new Set(units.filter((unit) => unit.hp > 0).map((unit) => unit.id));
-  return attackIntents.every((intent) => liveUnitIds.has(intent.attackerId) && liveUnitIds.has(intent.targetId));
+  return attackIntents.every(
+    (intent) =>
+      liveUnitIds.has(intent.attackerId) &&
+      liveUnitIds.has(intent.targetId) &&
+      (!options.validAllyUnitIds || options.validAllyUnitIds.has(intent.attackerId)) &&
+      (!options.validEnemyUnitIds || options.validEnemyUnitIds.has(intent.targetId))
+  );
 }
 
 function areEffectsTargetingLiveUnits(