fix: extract testScene window.open to method to avoid template scope issue

editor/App.vue

@@ -48,6 +48,10 @@ function importJSON() {
   fileInputRef.value?.click()
 }
 
+function testScene(id: string) {
+  window.open('/?scene=' + id, '_blank')
+}
+
 async function onFileSelected(e: Event) {
   const file = (e.target as HTMLInputElement).files?.[0]
   if (!file) return
@@ -116,7 +120,7 @@ onMounted(() => loadDemo())
           :selected-node-id="store.selectedNodeId"
           @select-node="store.selectedNodeId = $event"
           @add-edge="editor.onAddEdge"
-          @test-scene="(id: string) => window.open('/index.html?scene=' + id, '_blank')"
+          @test-scene="testScene"
         />
         <div v-else-if="loading" class="loading-hint">加载剧情数据…</div>
         <PreviewPanel v-if="showPreview" :video-url="previewVideoUrl" />