Yes, you need to look at the room with new eyes, you need to look at everything in it and think about it’s potential to harm you.
A well aimed missile can cause immense harm.
Those ornaments should be packed away.
Take a photo of them in a box. When she says ‘where are my ornaments‘, say ‘ they have gone to a company called ‘ Jane‘s ornamentally good’ they clean and renovate ornaments‘ here is the box I took them in, they will be back soon.
It will be sad when Jane breaks her leg, and even sadder when her dog dies and she has to go to Bosnia to buy a new one.
i don’t know how the room is configured but in a perfect world your mother will never stand between you and the door.
If could be ‘just’ dementia , but be thinking why now?
Is she
hungry
thirsty
in pain
sundowning
left alone.
Just been asked to do an activity she doesn't want to.
Not taken her medication.
Ect.
one way of dealing with the behaviour is distraction.
One method is phoning the landline with your mobile.
Talk it over with your family. Script possible distractions like in a play.
Think about one of those ‘ rape alarms’ . I have never tried it but would think that terrible noise would stop anyone in their tracks , if ever needed as a last resort.
Cover the glass door in protective film from Ebay or bubble wrap.
you need to start a diary of events. That way you will be able to present a much clearer picture to the health professionals.