chart等比如折线图只有一维，希望支持多维

```infographic
infographic chart-line-plain-text
data
title 最新期次ATP各规格部件每月累计缺口
desc 仅展示有短缺且品类为CPU、GPU、HDD、SSD、Memory、NIC、SmartNIC的数据
items
- label 2025-12
value 11
desc HDD-1
- label 2026-01
value 22
desc MEM-xx
- label 2026-02
value 333
desc MEM-xx
- label 2026-03
value 444
desc MEM-xx2
```

hello，以上是示例，这个是在使用prompt后ai生成的，但是其实本身是多维的，desc的值是多维度才对，即需要多条折线图，而在这个场景下折线图只能生成一条线，很受限

Start by reproducing the provided `infographic chart-line-plain-text` example and trace how its `items` and `desc` values become a line chart. Determine where multiple dimensions or series would be represented and rendered; done means the example can display multiple lines with the relevant dimension labels and existing single-line input still works.

Written by the indexing model from the issue text.