Use shadcn/ui built-in check for sidebar state

[JoeyMckenzie]

Shadcn includes built-in functionality to determine the sidebar state via cookie, so the local component logic utilizing local storage is unnecessary. This is a very minor change and not necessarily a fix, so I'm okay with this going by the wayside as well if we see no functional value in it.

Just wanted to bring it up. Depending on the user's local environment setup, they could see warnings about hydrated content mismatch in the dev console that can be traceable to the typeof window !== 'undefined' logic in the app-shell.tsx shell.

[tnylea]

Hey @JoeyMckenzie,

Thanks. I really like this technique. When the sidebar is collapsed on SSR, you'll see a flicker of the sidebar open and then collapse, which is not a very good UX. Let me do a little more testing on my end with this and then I can approve it if everything else looks good 👍

[tnylea]

This is excellent @JoeyMckenzie 👏

Just verified that this fixes that flicker of the sidebar when viewing SSR.

Would you mind re-creating this PR in the Vue Starter kit as well. let me know if that's possible and we'll work on getting this one merged in 😉

[JoeyMckenzie]

@tnylea Absolutely, no problem. I'll queue up the change a little later today.

Happy to help!