Thank you very much, Master Cecil!
The small cupboard marked in A is around 80 cm distant from the edge of the bed, considering an angle of 45 degrees, so just to confirm, that distance would not be an issue, right? I had previously written the distance in feet, but I prefer to tell you in cm. I hope it is ok.
I think that the image was not so well-done (sorry about that!) and door actually opens in another direction (image attached), so there wouldn't be a coffin position. The problem with that is the bedroom door is opposite the bathroom door (there is a corridor between both doors), unfortunately, but I guess I will have to keep the bathroom door closed at all times.
In this image, I changed the wardrobe design (it was a different option), but I felt that there could be a poison arrow where I left the question mark because the distance between this wardrobe corner and the edge of the bed would be only 60 cm. So in this case, it wouldn't be so problematic, because it would be closer to the edge of the bed and not aimed closer to the body, as you said? Or 60 cm is already long enough for it not to be a poison arrow?
Thanks!