feat: 优化填充组图层背景命令，支持实时更新和撤销功能，改进填充对象的处理逻辑

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

@@ -1,3 +1,4 @@
+import { FillGroupLayerBackgroundCommand } from "../commands/FillGroupLayerBackgroundCommand";
 import { FillLayerBackgroundCommand } from "../commands/FillLayerBackgroundCommand";
 
 export class BackgroundFillManager {
@@ -12,15 +13,21 @@ export class BackgroundFillManager {
    * 填充指定图层背景
    * @param {string} layerId 图层ID
    * @param {string} fillColor 填充颜色
+   * @param {boolean} undoable 是否可撤销
+   * @returns {Promise<void>}
    */
-  async fillLayerBackground(layerId, fillColor) {
-    const command = new FillLayerBackgroundCommand({
+  async fillLayerBackground(layerId, fillColor, undoable) {
+    const command = new FillGroupLayerBackgroundCommand({
       canvas: this.canvas,
       layers: this.layers,
       layerId,
       fillColor,
       canvasManager: this.canvasManager,
+      // 是否实时更新
+      isRetimeUpdate: !undoable,
     });
+    command.undoable = undoable;
+
     if (this.commandManager) {
       await this.commandManager.execute(command);
     } else {