Add missing editor content

src/app/editor/EditorContent.svelte

@@ -0,0 +1,22 @@
+<script lang="ts">
+  import {onDestroy, onMount} from "svelte"
+
+  const {editor} = $props()
+
+  let element: HTMLElement
+
+  onMount(() => {
+    if (element) {
+      element.append(...(Array.from(editor.options.element.childNodes) as any))
+      editor.setOptions({element})
+      editor.contentElement = element
+    }
+  })
+
+  onDestroy(() => {
+    editor.contentElement = null
+    editor.setOptions({element: null})
+  })
+</script>
+
+<div bind:this={element}></div>