fix(order): 移除订单列表冗长的买家信息列，优化多平台表格密度

- 移除订单列表中的「买家信息」列，消除抖音等虚拟品类中超长加密 open_id / 匿名买家造成的垂直与水平排版挤压
- 紧凑化表格宽度（scroll 960px），提升列表浏览效率
- 详情页继续保留完整买家原始载荷供追溯

验证方式：前端类型检查及 132 项单测全通过，前端打包构建通过

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

@@ -5,7 +5,6 @@ import {
   ReloadOutlined,
   SearchOutlined,
   ShopOutlined,
-  UserOutlined,
 } from '@ant-design/icons'
 import {
   App,
@@ -237,40 +236,6 @@ export default function AdminOrdersPage() {
         )
       },
     },
-    {
-      title: '买家信息',
-      minWidth: 140,
-      render: (_, row) => {
-        const buyerName = row.buyerName || ''
-        const buyerId = row.buyerId || ''
-        const contact = row.receiverContact || ''
-
-        if (!buyerName && !buyerId && !contact) {
-          return <span className="muted">-</span>
-        }
-
-        return (
-          <div className="cell-stack" style={{ gap: 2 }}>
-            <div style={{ display: 'flex', alignItems: 'center', gap: 4 }}>
-              <UserOutlined style={{ color: '#94a3b8', fontSize: 12 }} />
-              <Typography.Text strong style={{ fontSize: 13 }} ellipsis={{ tooltip: buyerName }}>
-                {buyerName || '匿名买家'}
-              </Typography.Text>
-            </div>
-            {buyerId ? (
-              <span className="muted" style={{ fontSize: 11 }} title={`买家ID: ${buyerId}`}>
-                ID: {buyerId}
-              </span>
-            ) : null}
-            {contact && contact !== buyerName ? (
-              <span className="muted" style={{ fontSize: 11 }}>
-                {contact}
-              </span>
-            ) : null}
-          </div>
-        )
-      },
-    },
     {
       title: '商品 / 规格',
       minWidth: 260,
@@ -562,7 +527,7 @@ export default function AdminOrdersPage() {
           loading={query.isLoading || query.isFetching || !hasBootstrappedFilters}
           columns={columns}
           dataSource={data?.items || []}
-          scroll={{ x: 1100 }}
+          scroll={{ x: 960 }}
           pagination={buildAdminTablePagination({
             current: data?.pagination.page || page,
             pageSize: data?.pagination.pageSize || pageSize,