feat: 优化跨层级移动和套索抠图命令，支持异步执行，改进画布刷新逻辑，新增背景裁剪选项

src/component/Canvas/CanvasEditor/managers/CanvasManager.js

@@ -977,7 +977,6 @@ export class CanvasManager {
         }
 
         this.layers.value = tempLayers;
-        debugger;
 
         // this.canvasWidth.value = parsedJson.canvasWidth || this.width;
         // this.canvasHeight.value = parsedJson.canvasHeight || this.height;
@@ -1039,8 +1038,10 @@ export class CanvasManager {
               // 使用LayerSort工具重新排列画布对象（如果可用）
               await this?.layerManager?.layerSort?.rearrangeObjects();
 
-              this.layerManager.activeLayerId.value =
-                this.layers.value[0]?.id || parsedJson?.activeLayerId || null;
+              this.layerManager.activeLayerId.value = this.layers.value[0]
+                .children?.length
+                ? this.layers.value[0].children[0].id
+                : this.layers.value[0]?.id || parsedJson?.activeLayerId || null;
 
               // // 如果检测到红绿图模式内容，进行缩放调整
               // if (this.enabledRedGreenMode) {