No dashed or dotted grid lines with ggplotly

It seems that ggplotly cannot handle dashed or dotted grid lines. They always default to solid grid lines.

No matter whether I am specifying the general option panel.grid or a specific one like panel.grid.major.y, they always become solid with ggplotly.

library(ggplot2)
library(plotly)

# Dotted and dashed grid lines appear with ggplot2
p <- ggplot(mtcars, aes(disp, mpg)) +
  geom_point() +
  theme(panel.grid = element_line(colour = "red",
                                  linetype = "dotted")) # same issue if "dashed"

p

# However, with ggplotly they become solid
ggplotly(p)

首先使用 ggplot2 和 ggplotly 运行 issue 中的 R 示例，然后跟踪 panel.grid 和 panel.grid.major.y 设置是如何转换的。完成标准是：虚线和点线网格线在 ggplotly 输出中仍保持为虚线或点线，与原始 ggplot2 图一致。