Hi.
is there some kind of a gui in home hassistant for controlling devices like tv from remote controller function (left,right, up, down, enter and so forth)?
is it possible to navigate television from HA tablet or phone , i meen actual controller?
There is nothing ready baked, but there are a couple of options.
Lovelace has a picture elements card that allows you to make parts of an image interactive. If you use an image of your remote controller then you simply have the laborious task of setting up the locations of you various switches.
If you want something simpler, an arrangement of entity buttons may work.
For the original UI I was going to recommend custom tiles UI. Though I just had a look and it seems this custom component has been deleted from github.