fix(web): redirect to parent folder if asset viewer was open before reload (#2863)

* fix(web): redirect to parent folder if asset viewer was open before reload

* chore(web): use route constants in all routes

web/src/routes/(user)/explore/+page.server.ts

@@ -1,10 +1,11 @@
 import { redirect } from '@sveltejs/kit';
 import type { PageServerLoad } from './$types';
+import { AppRoute } from '$lib/constants';
 
 export const load = (async ({ locals, parent }) => {
 	const { user } = await parent();
 	if (!user) {
-		throw redirect(302, '/auth/login');
+		throw redirect(302, AppRoute.AUTH_LOGIN);
 	}
 
 	const { data: items } = await locals.api.searchApi.getExploreData();