refactor(state): fix code quality findings for nav panel store and prefs

src/state/__tests__/store.test.ts

@@ -1,4 +1,5 @@
-import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { getPrefs } from '../prefs';
 import { useGameStore } from '../store';
 
 describe('game store nav and prefs', () => {
@@ -12,6 +13,15 @@ describe('game store nav and prefs', () => {
         store[key] = value;
       },
     });
+    useGameStore.setState({
+      activePanel: 'play',
+      selectedStoryNodeId: null,
+      prefs: getPrefs(),
+    });
+  });
+
+  afterEach(() => {
+    vi.unstubAllGlobals();
   });
 
   it('has default activePanel and selectedStoryNodeId', () => {