логика выделена в отдельный набор классов

src/game/persistence.ts

@@ -1,4 +1,4 @@
-import type { Inventory, RabbitState, ResourceDrop, ResourceNode, Vec2 } from './types';
+import type { Inventory, RabbitData, ResourceDropData, ResourceNodeData, Vec2 } from './types';
 import type { UpgradeId } from './upgrades';
 
 const STORAGE_KEY = 'forest-save-v1';
@@ -10,10 +10,10 @@ export interface SaveData {
   /** World state (character/nodes/drops) is optional so older saves without it still load fine —
    * progress is restored either way, just with a freshly spawned world. */
   character?: Vec2;
-  nodes?: ResourceNode[];
-  resourceDrops?: ResourceDrop[];
+  nodes?: ResourceNodeData[];
+  resourceDrops?: ResourceDropData[];
   /** Absent on saves from before rabbits existed, which get a freshly spawned batch instead. */
-  rabbits?: RabbitState[];
+  rabbits?: RabbitData[];
   /** Absent on older saves, which are treated as day 1. */
   day?: number;
   /** In-game clock hour (0-24). Absent on older saves, which are treated as noon. */