feat(admin): country drag-sort + always-available member detail sync

- Country 加 sort_order（默认 0 保持 id 序）；PATCH /countries/sort 批量保存
  顺序（对齐 /tags/sort 模式）；findAll 与公开 /public/countries 均按
  sortOrder 排序
- CountriesView 表格改为可拖拽行列表：拖动松开即全量保存新顺序，失败回滚
- 商品编辑弹窗成员展开面板：同步详情按钮常驻（已同步显示 重新同步详情），
  不再只在未同步态出现
- goods.service.spec 的 FamilyRecomputeService mock 补齐 syncFamilyTags 等
  方法（全量并行时其他套件的扫名归族会把本套件夹具收进族，create/update
  会调用到，mock 缺方法导致偶发 TypeError）
- api 164/164、admin typecheck+22/22+构建全绿

apps/admin/src/views/goods/components/GoodsEditDialog.vue

@@ -647,12 +647,17 @@ async function handleDeleteGood() {
               </el-table>
             </div>
             <div v-if="row.source === 'SDS'" class="member-extra">
-              <div v-if="!memberDetail(row.id) || memberDetail(row.id).loading" class="md-empty">详情加载中…</div>
-              <div v-else-if="!memberDetail(row.id).hasDetail" class="md-empty">
-                尚未同步详情
-                <el-button size="small" :icon="Refresh" :loading="detailSyncing === row.id" @click="handleSyncMemberDetail(row)">同步详情</el-button>
+              <div class="member-detail-head">
+                <span v-if="!memberDetail(row.id) || memberDetail(row.id).loading" class="md-empty">详情加载中…</span>
+                <span v-else-if="!memberDetail(row.id).hasDetail" class="md-empty">尚未同步详情</span>
+                <el-button
+                  size="small"
+                  :icon="Refresh"
+                  :loading="detailSyncing === row.id"
+                  @click="handleSyncMemberDetail(row)"
+                >{{ memberDetail(row.id)?.hasDetail ? '重新同步详情' : '同步详情' }}</el-button>
               </div>
-              <el-tabs v-else class="member-detail-tabs">
+              <el-tabs v-if="memberDetail(row.id) && memberDetail(row.id).hasDetail" class="member-detail-tabs">
                 <el-tab-pane label="商品详情">
                   <el-descriptions :column="2" border size="small">
                     <el-descriptions-item label="商品编码">{{ memberDetail(row.id).detail.productCode || '-' }}</el-descriptions-item>
@@ -908,6 +913,11 @@ async function handleDeleteGood() {
   display: flex; align-items: center; justify-content: space-between; gap: 8px;
   font-size: 12px; color: var(--el-text-color-placeholder); padding: 4px 0;
 }
+.member-detail-head {
+  display: flex; align-items: center; justify-content: space-between; gap: 8px;
+  margin-bottom: 4px;
+}
+.member-detail-head .md-empty { padding: 0; }
 .member-detail-tabs :deep(.el-tabs__header) { margin-bottom: 8px; }
 .edit-family-loading { color: var(--el-text-color-placeholder); font-size: 12px; padding: 4px 0; }
 .family-detail-tabs { margin-top: 10px; }