feat: 1.固定图层缩略图（完成）

2.工具栏新增插槽（完成）
3.loadJSON的元素顺序回发生错误

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

@@ -348,14 +348,18 @@ export class CanvasManager {
     }
   }
 
-  setCanvasSize(width, height) {
+  async setCanvasSize(width, height) {
     this.width = width;
     this.height = height;
     this.canvas.setWidth(width);
     this.canvas.setHeight(height);
 
     // 重置视图变换以确保元素位置正确
-    this._resetViewportTransform();
+    // this._resetViewportTransform();
+    if (this.canvas.getZoom() !== 1 || this.canvas.viewportTransform[0] !== 1) {
+      this.canvas.setViewportTransform([1, 0, 0, 1, 0, 0]);
+      await this.resetZoom();
+    }
 
     // 居中所有画布元素，包括背景层和其他元素
     this.centerAllObjects();
@@ -964,7 +968,6 @@ export class CanvasManager {
                 this.layers.value,
                 this.canvas.getObjects()
               );
-
               // 验证图层关联关系  -  稳定后可以注释
               const isValidate = validateLayerAssociations(
                 this.layers.value,
@@ -972,6 +975,9 @@ export class CanvasManager {
               );
 
               console.log("图层关联验证结果:", isValidate);
+              // 排序
+              // 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;