SvelteKit Snapshot Flash Bug

Minimal reproduction for a SvelteKit bug where snapshot restore causes a brief UI flash with the initial state value.

Steps to reproduce

1. Clone the repo and run npm install && npm run dev
2. Edit the textarea (change "hello" to something else)
3. Click the link to navigate to another page
4. Press the browser back button
5. Open the console and observe the $inspect output

Expected behavior

The restored snapshot value should be applied before the first render, without showing the default state value.

Actual behavior

The default value ("hello") briefly flashes in the UI and appears in $inspect before being replaced by the restored snapshot value.