feat(fragment): 小程序适配碎片多数量产出展示

- normalizeRewards 传递 drop_quantity 字段
- 抽奖结果弹窗自动合并同类碎片显示 x{N}
- 购买记录仅 count>1 时显示数量角标（当前不展示）
- RewardsPreview/RewardsPopup 保留 drop_quantity 样式（当前不展示）

components/activity/RecordsList.vue

@@ -19,7 +19,7 @@
             <view class="record-info">
               <view class="record-title">{{ item.title }}</view>
               <view class="record-meta">
-                 <text class="record-count">x1</text>
+                 <text class="record-count" v-if="item.count > 1">x{{ item.count }}</text>
               </view>
             </view>
         </view>

components/activity/RewardsPopup.vue

@@ -205,6 +205,16 @@ defineEmits(['update:visible'])
   flex-shrink: 0;
 }
 
+.rewards-qty-tag {
+  font-size: $font-xxs;
+  font-weight: 700;
+  color: #fff;
+  background: linear-gradient(135deg, #ff6b35, #ff4500);
+  padding: 2rpx 10rpx;
+  border-radius: $radius-sm;
+  flex-shrink: 0;
+}
+
 .rewards-percent {
   font-size: $font-sm;
   color: $text-sub;

components/activity/RewardsPreview.vue

@@ -242,6 +242,20 @@ const rewardGroups = computed(() => {
   }
 }
 
+.drop-qty-badge {
+  position: absolute;
+  top: 10rpx;
+  right: 10rpx;
+  background: linear-gradient(135deg, #ff6b35, #ff4500);
+  color: #fff;
+  font-size: 20rpx;
+  padding: 2rpx 10rpx;
+  border-radius: 16rpx;
+  z-index: 10;
+  font-weight: 700;
+  box-shadow: 0 2rpx 6rpx rgba(255, 69, 0, 0.3);
+}
+
 /* 空状态 */
 .empty-state {
   display: flex;

pages-activity/composables/useRecords.js

@@ -31,7 +31,7 @@ export function useRecords() {
                 id: it.id,
                 title: it.reward_name || it.title || it.name || '-', // 奖品名称
                 image: it.reward_image || it.image || '', // 奖品图片
-                count: 1, // 单个记录数量为1
+                count: 1,
 
                 // 用户信息
                 user_id: it.user_id,

utils/activity.js

@@ -110,6 +110,7 @@ export function normalizeRewards(list, cleanUrl = (u) => u) {
         weight: Number(i.weight) || 0,
         boss: detectBoss(i),
         min_score: i.min_score || 0,
+        drop_quantity: Number(i.drop_quantity) || 1,
         level: levelToAlpha(i.prize_level ?? i.level ?? (detectBoss(i) ? 'BOSS' : '赏'))
     }))
     const total = items.reduce((acc, it) => acc + (it.weight > 0 ? it.weight : 0), 0)