refactor: 清理废弃资源并优化预制件配置

1.  删除旧的auie系列预制件、图片资源及元数据
2.  更新精灵帧引用和图集配置
3.  调整buff预制件节点结构和动画时长
4.  优化UI控件的渲染属性和布局参数

assets/resources/gui/element/loading_page.prefab

@@ -173,12 +173,12 @@
       "a": 255
     },
     "_spriteFrame": {
-      "__uuid__": "d7d869bc-06aa-4876-806f-487e68b96780@1e2d6",
+      "__uuid__": "cb93c900-b440-4571-91d1-7da1636e3d73@7f50d",
       "__expectedType__": "cc.SpriteFrame"
     },
     "_type": 0,
     "_fillType": 0,
-    "_sizeMode": 1,
+    "_sizeMode": 0,
     "_fillCenter": {
       "__type__": "cc.Vec2",
       "x": 0,
@@ -189,7 +189,7 @@
     "_isTrimmedMode": true,
     "_useGrayscale": false,
     "_atlas": {
-      "__uuid__": "d7d869bc-06aa-4876-806f-487e68b96780",
+      "__uuid__": "cb93c900-b440-4571-91d1-7da1636e3d73",
       "__expectedType__": "cc.SpriteAtlas"
     },
     "_id": ""