disable ai help if not logged in

session will resolve to undefined due to optional chaining which does not equal null so the ai help will not be disabled even if the user is not logged in. with this new change, we're directly comparing the session which will be null if the user is not logged in

src/components/popups-etc/help.tsx

@@ -130,7 +130,7 @@ export default function Help(props: HelpProps) {
 							showingChat.value ? styles.selected : ""
 						}`}
 						disabled={
-							props.persistenceState?.value.session?.user === null
+							props.persistenceState?.value.session === null
 						}
 						onClick={() => {
 							showingChat.value = true;