feat: 更新填充组图层背景命令，增强图层管理和颜色填充功能，优化图层选择和渲染逻辑

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

@@ -17,6 +17,11 @@ export class BackgroundFillManager {
    * @returns {Promise<void>}
    */
   async fillLayerBackground(layerId, fillColor, undoable) {
+    if (!layerId || !fillColor) {
+      console.warn("图层ID或填充颜色不能为空");
+      return;
+    }
+
     const command = new FillGroupLayerBackgroundCommand({
       canvas: this.canvas,
       layers: this.layers,