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/api/src/countries/countries.service.spec.ts

@@ -112,4 +112,30 @@ describe('CountriesService', () => {
     const idx = created.indexOf(`${name}-v2`);
     if (idx !== -1) created.splice(idx, 1);
   });
+
+  it('reorder persists sortOrder and findAll honors it', async () => {
+    const stamp = Date.now();
+    const a = await service.create({ countryName: `Sort A ${stamp}` });
+    const b = await service.create({ countryName: `Sort B ${stamp}` });
+    const c = await service.create({ countryName: `Sort C ${stamp}` });
+    created.push(a.countryName, b.countryName, c.countryName);
+
+    // 新顺序 C, A, B（id 序与 sortOrder 无关时也能稳定验证）
+    const reordered = await service.reorder({
+      items: [
+        { id: Number(c.id), sortOrder: 0 },
+        { id: Number(a.id), sortOrder: 1 },
+        { id: Number(b.id), sortOrder: 2 },
+      ],
+    });
+    const ours = reordered.filter((r) =>
+      [a.id, b.id, c.id].some((id) => id.toString() === r.id.toString()),
+    );
+    expect(ours.map((r) => r.id.toString())).toEqual([c.id.toString(), a.id.toString(), b.id.toString()]);
+
+    const list = await service.findAll();
+    const pos = (id: bigint) => list.findIndex((r) => r.id.toString() === id.toString());
+    expect(pos(c.id)).toBeLessThan(pos(a.id));
+    expect(pos(a.id)).toBeLessThan(pos(b.id));
+  });
 });