fix(products): 恢复官方正版商品图并统一渠道代码格式化

- 从上游系统同步官方原始高清商品图（lucky_coin_x2/x30/x90），剔除此前劣质变形的合成图
- 验证全量 40 款商品资产与 affiliate_dash 官方权威库 100% 逐字节对齐
- 任务详情页接入 formatGameChannelLabel 统一渠道展示逻辑（1-1 -> 安卓-微信）
- 验证方式：npm run build、npm test（674 自动化单测全部通过）

apps/frontend/src/pages/admin/AdminTaskDetailPage.tsx

@@ -66,6 +66,7 @@ import { formatAdminDateTime } from '@/utils/admin-time'
 import {
   copyVoucherDataUrlToClipboard,
   downloadVoucherDataUrl,
+  formatGameChannelLabel,
   generateVoucherDataURL,
   type DeliveryVoucherData,
 } from '@/utils/voucher'
@@ -197,7 +198,7 @@ export default function AdminTaskDetailPage() {
     const productSKU =
       detail.orderItem?.skuCode || detail.task.skuCode || detail.affiliateDash?.sku || ''
     const rawChannel = detail.affiliateDash?.gameChannel || ''
-    const channel = rawChannel === '1-1' ? '安卓-微信' : rawChannel || '安卓-微信'
+    const channel = formatGameChannelLabel(rawChannel)
     const redeemedAt =
       detail.task.redeemedAt || detail.affiliateDash?.lastSyncedAt || detail.task.updatedAt
     const voucherNo = detail.task.taskNo || ''