fix(UI): 修正能量显示格式和动画问题

修复能量标签显示格式从"%.1f"改为"%.2f"
调整BigLaser能量消耗从50改为100
修复ItemShow动画资源顺序错误问题
添加autoFree属性到UI场景中的物品节点
修改FieldShow默认文本从"+0"改为"0"

components/Scenes/UI.tscn

@@ -48,16 +48,19 @@ alignment = 1
 [node name="baseball" parent="root/container/items" instance=ExtResource("3_o2oi4")]
 unique_name_in_owner = true
 layout_mode = 2
+autoFree = null
 
 [node name="basketball" parent="root/container/items" instance=ExtResource("3_o2oi4")]
 unique_name_in_owner = true
 layout_mode = 2
 type = 1
+autoFree = null
 
 [node name="apple" parent="root/container/items" instance=ExtResource("3_o2oi4")]
 unique_name_in_owner = true
 layout_mode = 2
 type = 2
+autoFree = null
 
 [node name="panels" type="Control" parent="root"]
 unique_name_in_owner = true