refactor(heroBox): 优化英雄升级弹窗展示与UI边框

1.  移除英雄升级确认弹窗冗余的英雄名称变量拼接
2.  调整UI元素的边框偏移参数
3.  给英雄属性描述文本添加黑色描边优化显示效果
4.  更新了多个英雄预制件的节点ID与属性覆盖配置

assets/resources/gui/ui3.plist.meta

@@ -300,10 +300,10 @@
         "height": 63,
         "rawWidth": 54,
         "rawHeight": 63,
-        "borderTop": 0,
-        "borderBottom": 0,
-        "borderLeft": 0,
-        "borderRight": 0,
+        "borderTop": 30,
+        "borderBottom": 33,
+        "borderLeft": 27,
+        "borderRight": 27,
         "packable": true,
         "pixelsToUnit": 100,
         "pivotX": 0.5,