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/script/game/common/config/EquipSet.ts

@@ -116,6 +116,46 @@ export const EquipPoolList: CardConfig[] = EquipRawList.map(data => ({
     trigger_type: CardTriggerType.Field,
 }));
 
+/**
+ * 按权重抽取 N 张装备卡（unique 保证一次刷新内不重复，不足时允许重复补齐）。
+ * @param count 需要抽取的数量
+ */
+export function drawEquipCards(count: number): CardConfig[] {
+    const safeCount = Math.max(0, Math.floor(count));
+    if (EquipPoolList.length === 0 || safeCount <= 0) return [];
+
+    const picked: CardConfig[] = [];
+    let available = [...EquipPoolList];
+    while (picked.length < safeCount) {
+        if (available.length === 0) break;
+        const pick = weightedPick(available);
+        if (!pick) break;
+        picked.push(pick);
+        available = available.filter(c => c.uuid !== pick.uuid);
+    }
+
+    // 不足时允许重复补齐
+    const filled = [...picked];
+    while (filled.length < safeCount) {
+        const fallback = weightedPick(EquipPoolList);
+        if (!fallback) break;
+        filled.push(fallback);
+    }
+    return filled;
+}
+
+/** 单次按权重抽取一张卡 */
+function weightedPick(cards: CardConfig[]): CardConfig | null {
+    if (cards.length === 0) return null;
+    const totalWeight = cards.reduce((total, card) => total + (card.weight ?? 0), 0);
+    let random = Math.random() * totalWeight;
+    for (const card of cards) {
+        random -= (card.weight ?? 0);
+        if (random <= 0) return card;
+    }
+    return cards[cards.length - 1];
+}
+
 /**
  * 按 UUID 查找装备卡配置
  * @param uuid 装备卡 UUID