feat: 重构英雄成长系统，支持差异化成长曲线与无限升级

1. 新增英雄成长类型枚举与系数表，实现坦克/战士/刺客等差异化成长
2. 替换旧的固定指数成长逻辑，改用线性累计成长公式
3. 移除英雄等级上限，改为技能等级封顶，调整升级/出售金币计算逻辑
4. 重构属性计算与UI展示逻辑，统一成长计算入口
5. 优化技能文案展示与英雄配置格式

assets/resources/gui/element/barbtn.prefab

@@ -28,14 +28,14 @@
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@@ -436,8 +436,8 @@
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     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 240,
-      "height": 110
+      "width": 100,
+      "height": 100
     },
     "_anchorPoint": {
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@@ -473,7 +473,7 @@
       "a": 255
     },
     "_spriteFrame": {
-      "__uuid__": "6165ffc9-a838-4a33-b569-bdbaaab0e6b4@65cbe",
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     "_type": 1,
@@ -488,7 +488,10 @@
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     "_isTrimmedMode": true,
     "_useGrayscale": false,
-    "_atlas": null,
+    "_atlas": {
+      "__uuid__": "cb93c900-b440-4571-91d1-7da1636e3d73",
+      "__expectedType__": "cc.SpriteAtlas"
+    },
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@@ -509,10 +512,10 @@
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     "_alignFlags": 45,
     "_target": null,
-    "_left": 0,
-    "_right": 0,
-    "_top": 0,
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+    "_left": 70,
+    "_right": 70,
+    "_top": 5,
+    "_bottom": 5,
     "_horizontalCenter": 0,
     "_verticalCenter": 0,
     "_isAbsLeft": true,
@@ -552,219 +555,26 @@
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       "__id__": 1
     },
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+    "_children": [],
+    "_active": true,
+    "_components": [
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       },
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-    ],
-    "_active": false,
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+        "__id__": 25
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+        "__id__": 27
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-    "_name": "icon",
-    "_objFlags": 0,
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-      "height": 96
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-  {
-    "__type__": "cc.CompPrefabInfo",
-    "fileId": "6eBP1g6s5Goai//DXwnDla"
-  },
-  {
-    "__type__": "cc.Sprite",
-    "_name": "",
-    "_objFlags": 0,
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-    "_enabled": true,
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-    "_customMaterial": null,
-    "_srcBlendFactor": 2,
-    "_dstBlendFactor": 4,
-    "_color": {
-      "__type__": "cc.Color",
-      "r": 255,
-      "g": 255,
-      "b": 255,
-      "a": 255
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-      "__uuid__": "6165ffc9-a838-4a33-b569-bdbaaab0e6b4@24ff5",
-      "__expectedType__": "cc.SpriteFrame"
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-    "_fillCenter": {
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-      "x": 0,
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-    "_fillRange": 0,
-    "_isTrimmedMode": true,
-    "_useGrayscale": false,
-    "_atlas": null,
-    "_id": ""
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-  {
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-    "fileId": "caZzAfi9ZLqZS4Wd5Rqm3r"
-  },
-  {
-    "__type__": "cc.PrefabInfo",
-    "root": {
-      "__id__": 1
-    },
-    "asset": {
-      "__id__": 0
-    },
-    "fileId": "ce9MKPS+FJx4Y+XyFAZSyN",
-    "instance": null,
-    "targetOverrides": null,
-    "nestedPrefabInstanceRoots": null
-  },
-  {
-    "__type__": "cc.Node",
-    "_name": "Label",
-    "_objFlags": 0,
-    "__editorExtras__": {},
-    "_parent": {
-      "__id__": 22
-    },
-    "_children": [],
-    "_active": true,
-    "_components": [
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-        "__id__": 30
-      },
-      {
-        "__id__": 32
-      }
-    ],
-    "_prefab": {
-      "__id__": 34
-    },
-    "_lpos": {
-      "__type__": "cc.Vec3",
-      "x": 0,
-      "y": -30,
+      "y": 55,
       "z": 0
     },
     "_lrot": {
@@ -790,115 +600,6 @@
     },
     "_id": ""
   },
-  {
-    "__type__": "cc.UITransform",
-    "_name": "",
-    "_objFlags": 0,
-    "__editorExtras__": {},
-    "node": {
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-    },
-    "_enabled": true,
-    "__prefab": {
-      "__id__": 31
-    },
-    "_contentSize": {
-      "__type__": "cc.Size",
-      "width": 64,
-      "height": 54.4
-    },
-    "_anchorPoint": {
-      "__type__": "cc.Vec2",
-      "x": 0.5,
-      "y": 0.5
-    },
-    "_id": ""
-  },
-  {
-    "__type__": "cc.CompPrefabInfo",
-    "fileId": "fb/sGndAVJK7moJI1+G/0t"
-  },
-  {
-    "__type__": "cc.Label",
-    "_name": "",
-    "_objFlags": 0,
-    "__editorExtras__": {},
-    "node": {
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-    "_enabled": true,
-    "__prefab": {
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-    },
-    "_customMaterial": null,
-    "_srcBlendFactor": 2,
-    "_dstBlendFactor": 4,
-    "_color": {
-      "__type__": "cc.Color",
-      "r": 255,
-      "g": 255,
-      "b": 255,
-      "a": 255
-    },
-    "_string": "挑战",
-    "_horizontalAlign": 1,
-    "_verticalAlign": 1,
-    "_actualFontSize": 30,
-    "_fontSize": 30,
-    "_fontFamily": "Arial",
-    "_lineHeight": 40,
-    "_overflow": 0,
-    "_enableWrapText": true,
-    "_font": null,
-    "_isSystemFontUsed": true,
-    "_spacingX": 0,
-    "_isItalic": false,
-    "_isBold": true,
-    "_isUnderline": false,
-    "_underlineHeight": 2,
-    "_cacheMode": 0,
-    "_enableOutline": true,
-    "_outlineColor": {
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-      "a": 255
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-    "_outlineWidth": 2,
-    "_enableShadow": false,
-    "_shadowColor": {
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-    "_shadowBlur": 2,
-    "_id": ""
-  },
-  {
-    "__type__": "cc.CompPrefabInfo",
-    "fileId": "a9bThvxy9LiriOUrI/zZUU"
-  },
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-    "root": {
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-    "asset": {
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   {
     "__type__": "cc.UITransform",
     "_name": "",
@@ -909,12 +610,12 @@
     },
     "_enabled": true,
     "__prefab": {
-      "__id__": 36
+      "__id__": 24
     },
     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 180,
-      "height": 110
+      "width": 100,
+      "height": 100
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
@@ -937,7 +638,7 @@
     },
     "_enabled": true,
     "__prefab": {
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+      "__id__": 26
     },
     "_customMaterial": null,
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@@ -949,10 +650,7 @@
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       "a": 255
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-      "__expectedType__": "cc.SpriteFrame"
-    },
+    "_spriteFrame": null,
     "_type": 1,
     "_fillType": 0,
     "_sizeMode": 0,
@@ -982,14 +680,14 @@
     },
     "_enabled": true,
     "__prefab": {
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+      "__id__": 28
     },
     "_alignFlags": 45,
     "_target": null,
-    "_left": 0,
-    "_right": 0,
-    "_top": 0,
-    "_bottom": 0,
+    "_left": 70,
+    "_right": 70,
+    "_top": 5,
+    "_bottom": 5,
     "_horizontalCenter": 0,
     "_verticalCenter": 0,
     "_isAbsLeft": true,
@@ -1031,7 +729,7 @@
     },
     "_enabled": true,
     "__prefab": {
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     "_contentSize": {
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@@ -1059,11 +757,11 @@
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     "_enabled": true,
     "__prefab": {
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+      "__id__": 33
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     "clickEvents": [
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     ],
     "_interactable": true,