fix: remove legacy run in root +layout.svelte

src/routes/+layout.svelte

@@ -1,6 +1,4 @@
 <script lang="ts">
-	import { run } from "svelte/legacy";
-
 	import "../styles/main.css";
 
 	import { onDestroy, onMount, untrack } from "svelte";
@@ -110,11 +108,11 @@
 		clearTimeout(errorToastTimeout);
 	});
 
-	run(() => {
+	$effect(() => {
 		if ($error) onError();
 	});
 
-	run(() => {
+	$effect(() => {
 		if ($titleUpdate) {
 			const convIdx = conversations.findIndex(({ id }) => id === $titleUpdate?.convId);