Update to Sveltekit stores mocking due to depreciating $app/stores in Svelte 5.

[navsubrm]

Summary

I didn't see any other post on this, and I don't really know the full scope to fix the issue. I have been trying to pass page data to a story for a form I have using the parameters.sveltekit_experimental.stores per the documentation. After digging for a while, I identified the page context was updating, but the store wasn't. It has been driving me crazy for a day or so.

I think I finally found the issue. After reading through the add-on files, the mockSvelteKitStores export from storybook/code/frameworks/src/plugins/mock-sveltekit-stores.ts file is using $app/stores as the alias. I changed my form to use $app/stores instead of $app/state and the page context updated the page store. $app/stores is depreciated in Svelte 5, so is there a way to alias both $app/stores and $app/state? I don't want to break the add-on for anyone else by just trying to push an update to the alias.

import { getContext } from 'svelte';
import { page } from '$app/state';

const context = getContext('page-ctx');
$inspect('Context from form: ', context, page);

Console output:
init"Context from form: "
{data: {test: "passed"}, form: {fail: true, missingUsername: true, missingPassword: true}}
{data: {}, error: null, form: null, params: {}, route: {id: null}, …}

Thanks!

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