refactor: useStore! instead of checking for null

[lihebi]

We don't need to report the error. The error will be reported by zustand. Just keep in mind that the store is only valid inside a provided by RepoContext.Provider:

codepod/packages/ui/src/pages/repo.tsx

Lines 451 to 461 in 79683dc

	export function Repo({ yjsWsUrl }) {
	let { id } = useParams();
	const store = useRef(createRepoStore()).current;
	const setRepo = useStore(store, (state) => state.setRepo);
	// console.log("load store", useRef(createRepoStore()));
	useEffect(() => {
	setRepo(id!);
	}, []);
	return (
	<RepoContext.Provider value={store}>