feat: add child motion entry and fix auth env

src/routing/appRoutes.test.ts

@@ -1,7 +1,11 @@
-import { describe, expect, it } from 'vitest';
+import { afterEach, describe, expect, it, vi } from 'vitest';
 
 import { matchAppRoute } from './appRoutes';
 
+afterEach(() => {
+  vi.unstubAllEnvs();
+});
+
 describe('matchAppRoute', () => {
   it('routes the main app by default', () => {
     expect(matchAppRoute('/')).toEqual({
@@ -27,6 +31,20 @@ describe('matchAppRoute', () => {
     });
   });
 
+  it('routes child motion demo path to the standalone warmup demo', () => {
+    expect(matchAppRoute('/CHILD-MOTION-DEMO/')).toEqual({
+      kind: 'child-motion-demo',
+    });
+  });
+
+  it('blocks direct child motion demo path when edutainment entry is disabled', () => {
+    vi.stubEnv('VITE_ENABLE_EDUTAINMENT_ENTRY', 'false');
+
+    expect(matchAppRoute('/child-motion-demo')).toEqual({
+      kind: 'game',
+    });
+  });
+
   it('routes former standalone editor paths back to the main game', () => {
     expect(matchAppRoute('/item-editor/tools')).toEqual({
       kind: 'game',