fix(scenes) 种田系统测试，添加按钮等

scenes/testScenes/InventoryTestScene.js

@@ -223,18 +223,28 @@ export default class InventoryTestScene extends Phaser.Scene {
   createButtons() {
     const buttonWidth = 200;
     const buttonHeight = 40;
-    const buttonY = this.sys.game.config.height - 100;
+    const buttonY = this.sys.game.config.height - 150;
+    
+    // 创建背包按钮
+    this.createButton(this.sys.game.config.width - buttonWidth - 10, buttonY, '打开/关闭背包', () => {
+      this.inventoryUI.toggle();
+    });
     
     // 创建随机物品按钮
-    this.createButton(this.sys.game.config.width - buttonWidth - 10, buttonY, '创建随机物品', () => {
+    this.createButton(this.sys.game.config.width - buttonWidth - 10, buttonY + 50, '创建随机物品', () => {
       this.itemManager.createRandomItem();
     });
     
     // 创建清理物品按钮
-    this.createButton(this.sys.game.config.width - buttonWidth - 10, buttonY + 50, '清理所有物品', () => {
+    this.createButton(this.sys.game.config.width - buttonWidth - 10, buttonY + 100, '清理所有物品', () => {
       this.itemManager.clearAllItems();
       this.itemInfoText.setText('所有物品已清理');
     });
+    
+    // 创建返回菜单按钮
+    this.createButton(this.sys.game.config.width - buttonWidth - 10, buttonY + 150, '返回菜单', () => {
+      this.scene.start('BootScene');
+    });
   }
   
   /**