feat: 调整游戏难度并优化UI布局

- 降低卡池等级上限和英雄等级上限以简化前期难度
- 重新平衡前四波怪物配置，使难度曲线更平缓
- 移除卡池升级功能并隐藏相关UI按钮
- 调整角色控制器UI元素的位置和尺寸
- 修改加载界面元素的缩放比例

assets/resources/gui/role_controller.prefab

@@ -1062,7 +1062,7 @@
     "_lpos": {
       "__type__": "cc.Vec3",
       "x": 0,
-      "y": 435.147,
+      "y": 487.134,
       "z": 0
     },
     "_lrot": {
@@ -1453,7 +1453,7 @@
         "__id__": 72
       }
     ],
-    "_active": false,
+    "_active": true,
     "_components": [
       {
         "__id__": 80
@@ -1471,7 +1471,7 @@
     "_lpos": {
       "__type__": "cc.Vec3",
       "x": 0,
-      "y": 220.965,
+      "y": 208.926,
       "z": 0
     },
     "_lrot": {
@@ -1698,7 +1698,7 @@
     },
     "_lpos": {
       "__type__": "cc.Vec3",
-      "x": -70,
+      "x": -20,
       "y": 0,
       "z": 0
     },
@@ -1840,7 +1840,7 @@
     },
     "_lpos": {
       "__type__": "cc.Vec3",
-      "x": -47.013,
+      "x": 0,
       "y": 0,
       "z": 0
     },
@@ -2165,7 +2165,7 @@
     "_left": 0,
     "_right": 0,
     "_top": 0,
-    "_bottom": 435.147,
+    "_bottom": 487.134,
     "_horizontalCenter": 0,
     "_verticalCenter": 0,
     "_isAbsLeft": true,
@@ -2507,8 +2507,8 @@
     },
     "_lpos": {
       "__type__": "cc.Vec3",
-      "x": -180,
-      "y": 154.567,
+      "x": 0,
+      "y": 442.302,
       "z": 0
     },
     "_lrot": {
@@ -2557,7 +2557,7 @@
     },
     "_lpos": {
       "__type__": "cc.Vec3",
-      "x": -85.592,
+      "x": -26.797,
       "y": 0,
       "z": 0
     },
@@ -2716,7 +2716,7 @@
     },
     "_lpos": {
       "__type__": "cc.Vec3",
-      "x": 9.236,
+      "x": 62.916,
       "y": 0,
       "z": 0
     },
@@ -2866,7 +2866,7 @@
     },
     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 360,
+      "width": 720,
       "height": 45
     },
     "_anchorPoint": {
@@ -2940,9 +2940,9 @@
     "_alignFlags": 44,
     "_target": null,
     "_left": 0,
-    "_right": 360,
+    "_right": 0,
     "_top": 0,
-    "_bottom": 132.067,
+    "_bottom": 419.802,
     "_horizontalCenter": 0,
     "_verticalCenter": 0,
     "_isAbsLeft": true,
@@ -4938,7 +4938,7 @@
     },
     "_lpos": {
       "__type__": "cc.Vec3",
-      "x": 180,
+      "x": 0,
       "y": 153.275,
       "z": 0
     },
@@ -5032,7 +5032,7 @@
     },
     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 360,
+      "width": 720,
       "height": 45
     },
     "_anchorPoint": {
@@ -5139,8 +5139,6 @@
       "__id__": 0
     },
     "fileId": "35dr0lJV9CO5Ld8TLk7eCZ",
-    "instance": null,
-    "targetOverrides": null,
     "nestedPrefabInstanceRoots": null
   },
   {
@@ -5166,7 +5164,7 @@
     },
     "_lpos": {
       "__type__": "cc.Vec3",
-      "x": -138.644,
+      "x": -35,
       "y": 0,
       "z": 0
     },
@@ -5278,8 +5276,6 @@
       "__id__": 0
     },
     "fileId": "e7dPNasr5IyqES0tbwxJX3",
-    "instance": null,
-    "targetOverrides": null,
     "nestedPrefabInstanceRoots": null
   },
   {
@@ -5308,7 +5304,7 @@
     },
     "_lpos": {
       "__type__": "cc.Vec3",
-      "x": -114.038,
+      "x": -15.457,
       "y": 0,
       "z": 0
     },
@@ -5464,8 +5460,6 @@
       "__id__": 0
     },
     "fileId": "65zRY1wpZPNLTXws9hsdcE",
-    "instance": null,
-    "targetOverrides": null,
     "nestedPrefabInstanceRoots": null
   },
   {
@@ -5482,7 +5476,7 @@
     },
     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 360,
+      "width": 720,
       "height": 45
     },
     "_anchorPoint": {
@@ -5552,7 +5546,7 @@
     },
     "_alignFlags": 40,
     "_target": null,
-    "_left": 360,
+    "_left": 0,
     "_right": 0,
     "_top": 0,
     "_bottom": 0,
@@ -8775,7 +8769,7 @@
         "__id__": 491
       }
     ],
-    "_active": true,
+    "_active": false,
     "_components": [
       {
         "__id__": 497
@@ -10431,7 +10425,7 @@
     },
     "_lpos": {
       "__type__": "cc.Vec3",
-      "x": 0,
+      "x": -85,
       "y": 0,
       "z": 0
     },
@@ -11648,7 +11642,7 @@
     },
     "_lpos": {
       "__type__": "cc.Vec3",
-      "x": 240,
+      "x": 185,
       "y": 0,
       "z": 0
     },
@@ -12087,14 +12081,14 @@
     "node": {
       "__id__": 552
     },
-    "_enabled": true,
+    "_enabled": false,
     "__prefab": {
       "__id__": 572
     },
     "_alignFlags": 33,
     "_target": null,
     "_left": 0,
-    "_right": 0,
+    "_right": 120,
     "_top": 40,
     "_bottom": 1078.082,
     "_horizontalCenter": 0,
@@ -12198,7 +12192,7 @@
     },
     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 700,
+      "width": 590,
       "height": 150
     },
     "_anchorPoint": {
@@ -12232,11 +12226,11 @@
       "height": 40
     },
     "_startAxis": 0,
-    "_paddingLeft": 0,
+    "_paddingLeft": 100,
     "_paddingRight": 0,
     "_paddingTop": 0,
     "_paddingBottom": 0,
-    "_spacingX": 20,
+    "_spacingX": 50,
     "_spacingY": 0,
     "_verticalDirection": 1,
     "_horizontalDirection": 0,
@@ -12264,8 +12258,8 @@
     },
     "_alignFlags": 44,
     "_target": null,
-    "_left": 10,
-    "_right": 10,
+    "_left": 65,
+    "_right": 65,
     "_top": 1230,
     "_bottom": 7.988,
     "_horizontalCenter": 0,
@@ -12790,7 +12784,7 @@
         "__id__": 809
       }
     ],
-    "_active": true,
+    "_active": false,
     "_components": [
       {
         "__id__": 826