INSERT INTO mall_transfer (from_store_id, to_store_id, product_id, quantity, status, requested_by, reason, ai_recommended)
VALUES (#{fromStoreId}, #{toStoreId}, #{productId}, #{quantity}, COALESCE(#{status},'REQUESTED'),
#{requestedBy}, #{reason}, COALESCE(#{aiRecommended},FALSE))
UPDATE mall_transfer SET status = #{status}, approved_by = #{approvedBy}, updated_at = NOW() WHERE id = #{id}