浴缸前座椅的无缝替换与光影融合

请将第一张图片中浴缸前的椅子替换为第二张图片中的椅子。请调整尺寸和光源，使其自然融入，没有丝毫违和感。

Change the chair in front of the bathtub in the first image to the one in the second image. Please adjust the size and light source so that it blends in without any sense of incongruity.