feat(mission): 新增装备和商店刷新功能，重构抽卡逻辑

1. 新增按权重抽取装备卡的工具函数，支持去重后补齐
2. 重构任务界面卡牌组件：
   - 拆分英雄/装备/商店面板节点绑定，调整属性顺序
   - 新增装备和商店刷新按钮的交互逻辑
   - 替换原固定加载装备/商品列表为按权重随机抽取3个
3. 重构技能卡牌组件，改为技能商店卡项实现，简化原有逻辑
4. 修复prefab中的节点属性偏移和引用关系

assets/resources/gui/element/mission.prefab

@@ -7949,7 +7949,7 @@
     "propertyPath": [
       "_left"
     ],
-    "value": 480
+    "value": 480.0000000000002
   },
   {
     "__type__": "cc.TargetInfo",
@@ -7965,7 +7965,7 @@
     "propertyPath": [
       "_right"
     ],
-    "value": 10
+    "value": 9.999999999999773
   },
   {
     "__type__": "CCPropertyOverrideInfo",
@@ -20978,20 +20978,20 @@
       "__id__": 853
     },
     "closeEquips": null,
-    "showSkills": {
-      "__id__": 885
-    },
-    "closeSkills": null,
     "equipsPanNode": {
       "__id__": 315
     },
     "equipsBoxNode": {
-      "__id__": 374
+      "__id__": 400
     },
     "equipPrefab": {
       "__uuid__": "f30f91b1-3100-4d9e-befb-cdde5f86e6f8",
       "__expectedType__": "cc.Prefab"
     },
+    "showSkills": {
+      "__id__": 885
+    },
+    "closeSkills": null,
     "showShop": {
       "__id__": 914
     },
@@ -20999,8 +20999,13 @@
     "shopPanNode": {
       "__id__": 637
     },
-    "shopBoxNode": null,
-    "itemPrefab": null,
+    "shopBoxNode": {
+      "__id__": 678
+    },
+    "itemPrefab": {
+      "__uuid__": "abae16b3-c2a2-4971-95b1-fc121f769554",
+      "__expectedType__": "cc.Prefab"
+    },
     "cards_up": null,
     "coins_node": {
       "__id__": 129
@@ -21020,6 +21025,8 @@
     },
     "skill_ad_refresh": null,
     "skill_refresh_num_node": null,
+    "equip_refresh": null,
+    "shop_refresh": null,
     "_id": ""
   },
   {