fix: redirection for users already logged in

src/routes/auth/+page.svelte

@@ -140,7 +140,8 @@
 
 	onMount(async () => {
 		if ($user !== undefined) {
-			await goto('/');
+			const redirectPath = querystringValue('redirect') || '/';
+			goto(redirectPath);
 		}
 		await checkOauthCallback();