fix: 调整英雄升级所需数量，优化战斗和UI细节

1.  将英雄升级所需数量从2改为3
2.  调整UI3.plist的边框参数
3.  修改地图精灵帧和图集绑定
4.  优化技能提示框动画：减少停留时间并简化漂移淡出逻辑
5.  修改任务卡牌组件：战斗阶段不再隐藏面板，新增战斗阶段无法召唤英雄的限制，注释掉战斗阶段隐藏抽卡面板的代码
6.  重构hnode.prefab的层级和UI组件，调整等级显示样式

assets/resources/game/map/map_rpg.prefab

@@ -22325,7 +22325,7 @@
       "a": 255
     },
     "_spriteFrame": {
-      "__uuid__": "cb93c900-b440-4571-91d1-7da1636e3d73@bc0ca",
+      "__uuid__": "6165ffc9-a838-4a33-b569-bdbaaab0e6b4@96e5b",
       "__expectedType__": "cc.SpriteFrame"
     },
     "_type": 1,
@@ -22340,7 +22340,10 @@
     "_fillRange": 0,
     "_isTrimmedMode": true,
     "_useGrayscale": false,
-    "_atlas": null,
+    "_atlas": {
+      "__uuid__": "6165ffc9-a838-4a33-b569-bdbaaab0e6b4",
+      "__expectedType__": "cc.SpriteAtlas"
+    },
     "_id": ""
   },
   {

assets/resources/gui/ui3.plist.meta

@@ -2232,10 +2232,10 @@
         "height": 190,
         "rawWidth": 48,
         "rawHeight": 190,
-        "borderTop": 0,
+        "borderTop": 20,
         "borderBottom": 0,
         "borderLeft": 0,
-        "borderRight": 0,
+        "borderRight": 1,
         "packable": true,
         "pixelsToUnit": 100,
         "pivotX": 0.5,