feat: engine utils, editor and asset prefix improvements

editor/App.vue

@@ -1,6 +1,7 @@
 <script setup lang="ts">
 import { ref, computed, onMounted } from 'vue'
 import type { GameData, SceneNode } from '@engine/types'
+import { resolveAsset } from '@engine/utils'
 import { useGraphEditor } from './composables/useGraphEditor'
 import SceneGraph from './components/SceneGraph.vue'
 import NodeEditor from './components/NodeEditor.vue'
@@ -21,7 +22,7 @@ const selectedScene = computed<SceneNode | null>(() => {
 const previewVideoUrl = computed(() => {
   const url = selectedScene.value?.videoUrl
   if (!url) return null
-  return url.startsWith('/') ? url : '/' + url
+  return resolveAsset(editor.gameData.value.assetBase || '', url)
 })
 
 function newNode() {