-- 细胞产品规格改为文本存储（不再依赖 biz_cell_product_spec 下拉关联）
ALTER TABLE `biz_cell_product`
  ADD COLUMN `spec_text` varchar(200) DEFAULT NULL COMMENT '规格（文本）' AFTER `spec_id`;

-- 历史数据：若已关联规格主数据，回填展示文本
UPDATE `biz_cell_product` cp
INNER JOIN `biz_cell_product_spec` s ON s.id = cp.spec_id AND s.del_flag = 0
SET cp.spec_text = s.spec_name
WHERE cp.del_flag = 0
  AND (cp.spec_text IS NULL OR cp.spec_text = '')
  AND cp.spec_id IS NOT NULL
  AND cp.spec_id != '';