fix(ui): 调整加载界面和UI元素的边框与位置

- 修正loading界面背景图位置偏移问题
- 为aui和ui3图集中的多个元素添加九宫格边框设置
- 更新loading界面精灵帧引用

assets/resources/gui/aui.plist.meta

@@ -2600,10 +2600,10 @@
         "height": 63,
         "rawWidth": 250,
         "rawHeight": 63,
-        "borderTop": 0,
-        "borderBottom": 0,
-        "borderLeft": 0,
-        "borderRight": 0,
+        "borderTop": 22,
+        "borderBottom": 21,
+        "borderLeft": 65,
+        "borderRight": 33,
         "packable": true,
         "pixelsToUnit": 100,
         "pivotX": 0.5,