task-95(店铺中心): 实现店铺删除确认

新增 shop-manage-delete.ts(删除确认文案 + 删除后目标页回退) 并在
shop-manage-api.ts 增加 deleteShopManage(DELETE /api/admin/shop-manages/{id})。

TDD: task-95.test.ts 8 用例先 RED 后 GREEN。

admin-frontend-vue/src/pages/shop/shop-manage-api.ts

@@ -73,3 +73,8 @@ export async function fetchShopCredential(id: number, shopName: string): Promise
   }
   return credential
 }
+
+/** 删除店铺：DELETE /api/admin/shop-manages/{id}；成功后由调用方按目标页刷新。 */
+export async function deleteShopManage(id: number): Promise<void> {
+  await http.delete<unknown>(`${SHOP_MANAGE_ENDPOINT}/${id}`)
+}