feat: 新增卡牌自定义图标功能，优化图标加载逻辑

1. 为所有卡牌配置添加icon字段，支持自定义指定图集内的图标
2. 重构列表组件与卡片组件的图标获取逻辑，优先使用自定义图标
3. 更新预加载的图集资源从ui3改为ui6，适配新图标图集
4. 调整弹窗预制体尺寸与图集引用，适配新的图标资源系统

assets/resources/gui/auie/popup.prefab

@@ -136,8 +136,8 @@
     },
     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 710,
-      "height": 55
+      "width": 720,
+      "height": 1280
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
@@ -311,8 +311,8 @@
     },
     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 1420,
-      "height": 110
+      "width": 1440,
+      "height": 2560
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
@@ -348,7 +348,7 @@
       "a": 255
     },
     "_spriteFrame": {
-      "__uuid__": "dd7e2f04-f9b9-489b-8d38-b4971ad81910@7e6bd",
+      "__uuid__": "dd7e2f04-f9b9-489b-8d38-b4971ad81910@2ddbe",
       "__expectedType__": "cc.SpriteFrame"
     },
     "_type": 1,
@@ -363,7 +363,10 @@
     "_fillRange": 0,
     "_isTrimmedMode": true,
     "_useGrayscale": false,
-    "_atlas": null,
+    "_atlas": {
+      "__uuid__": "dd7e2f04-f9b9-489b-8d38-b4971ad81910",
+      "__expectedType__": "cc.SpriteAtlas"
+    },
     "_id": ""
   },
   {
@@ -486,8 +489,8 @@
     },
     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 1388,
-      "height": 78
+      "width": 1408,
+      "height": 2528
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
@@ -608,8 +611,8 @@
     },
     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 710,
-      "height": 55
+      "width": 720,
+      "height": 1280
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
@@ -667,6 +670,7 @@
       "__id__": 0
     },
     "fileId": "50T0YGiGBH7qZZFeATiEP+",
+    "instance": null,
     "targetOverrides": null
   }
 ]