Fix build error: Replace @storybook/test with vitest mocking for Storybook 9 compatibility

Co-authored-by: snomiao <[email protected]>

Author: Copilot

react-firebase-hooks/auth.mock.ts

@@ -1,15 +1,15 @@
-import { fn } from '@storybook/test'
+import { vi } from 'vitest'
 
 // Mock the Firebase auth hooks for Storybook
-export const useSignInWithGoogle = fn().mockName('useSignInWithGoogle')
-export const useSignInWithGithub = fn().mockName('useSignInWithGithub')
-export const useSignOut = fn().mockName('useSignOut')
-export const useAuthState = fn().mockName('useAuthState')
+export const useSignInWithGoogle = vi.fn().mockName('useSignInWithGoogle')
+export const useSignInWithGithub = vi.fn().mockName('useSignInWithGithub')
+export const useSignOut = vi.fn().mockName('useSignOut')
+export const useAuthState = vi.fn().mockName('useAuthState')
 
 // Set default return values
-useSignInWithGoogle.mockReturnValue([fn(), undefined, false, undefined])
-useSignInWithGithub.mockReturnValue([fn(), undefined, false, undefined])
-useSignOut.mockReturnValue([fn(), false, undefined])
+useSignInWithGoogle.mockReturnValue([vi.fn(), undefined, false, undefined])
+useSignInWithGithub.mockReturnValue([vi.fn(), undefined, false, undefined])
+useSignOut.mockReturnValue([vi.fn(), false, undefined])
 useAuthState.mockReturnValue([null, false, undefined])
 
 console.log('mocking react-firebase-hooks/auth', {

src/hooks/useFirebaseUser.mock.ts

@@ -1,8 +1,8 @@
-import { fn } from '@storybook/test'
+import { vi } from 'vitest'
 import * as actual from './useFirebaseUser'
 export * from './useFirebaseUser'
-export const useFirebaseUser = fn(actual.useFirebaseUser).mockName(
-    'useFirebaseUser'
-)
+export const useFirebaseUser = vi
+    .fn(actual.useFirebaseUser)
+    .mockName('useFirebaseUser')
 
 console.log('mocking useFirebaseUser', useFirebaseUser)