refactor(ui&logic): 调整UI边距与英雄属性计算逻辑

1.  修改ui3.plist.meta里两个UI元素的border边距配置
2.  重构HeroBoxComp的属性增量计算逻辑，修正属性加成只统计临时增益而非等级成长
3.  优化HeroSkillDesc的富文本样式，新增数值描边效果统一UI视觉风格

assets/resources/gui/ui3.plist.meta

@@ -5958,10 +5958,10 @@
         "height": 61,
         "rawWidth": 54,
         "rawHeight": 61,
-        "borderTop": 0,
-        "borderBottom": 0,
-        "borderLeft": 0,
-        "borderRight": 0,
+        "borderTop": 28,
+        "borderBottom": 33,
+        "borderLeft": 27,
+        "borderRight": 27,
         "packable": true,
         "pixelsToUnit": 100,
         "pivotX": 0.5,
@@ -6006,8 +6006,8 @@
         "rawHeight": 24,
         "borderTop": 0,
         "borderBottom": 0,
-        "borderLeft": 0,
-        "borderRight": 0,
+        "borderLeft": 25,
+        "borderRight": 25,
         "packable": true,
         "pixelsToUnit": 100,
         "pivotX": 0.5,