feat(engine): add story fields to GameState

src/state/__tests__/persistence.test.ts

@@ -79,6 +79,9 @@ describe('loadGame()', () => {
           activeActionId: 'ghost-action',
           actionElapsedMs: 0,
           actionQueue: [],
+          storyFlags: {},
+          currentStoryNodeId: '',
+          seenStoryNodeIds: [],
         },
         1000,
       ),

src/state/persistence.ts

@@ -103,6 +103,9 @@ export async function loadGame(
       activeActionId,
       actionElapsedMs: save.state.actionElapsedMs,
       actionQueue: [...(save.state.actionQueue ?? [])],
+      storyFlags: { ...base.storyFlags },
+      currentStoryNodeId: base.currentStoryNodeId,
+      seenStoryNodeIds: [...base.seenStoryNodeIds],
     };
     savedAt = save.savedAt;
   } catch {