Have to ask, there are Troops actually aboard said ship?

Asking from experience...

2 - How do you see the details of ground units embarked in TT module? I would like to add a 100-tons TT module on each of my medium+ warships, but it seems you don't know much about the troop once it is boarded.

You can see some information in the "Transported Items" tab on the naval organization window. You can also see the entire formation detail on the Ground Forces window, OOB tab, if you check the box to show units on ships (which is off by default).

As an aside, while 100 tons is probably fine for ship's defense squads, I would probably suggest using 200 tons if you want to conduct boarding actions, as I've found in practice that 100 tons is a bit too small for most typical ship sizes you might want to capture.

1 - is it possible to speed up the construction of a space station with components? I see no checkbox, so I guess it's not (possible)

Not if you are building the space station with Construction Factories.

Ah well, Truce. I believe no-one but Steve no the fine details about it. Anyway, moving on!

1 - is it possible to speed up the construction of a space station with components? I see no checkbox, so I guess it's not (possible)

2 - How do you see the details of ground units embarked in TT module? I would like to add a 100-tons TT module on each of my medium+ warships, but it seems you don't know much about the troop once it is boarded.

3 - Do STOs benefit implicitly from the Spinal mount research? Or never ever?

While there are already good and extensive AI image packs, I didn't find them to fit the atmosphere in my own games very well.   So I decided to bother Stable Diffusion and create an image pack in an alternative style, reminiscent of 1970s, 80s and 90s sci-fi book covers.       

The guiding ideas behind this set were:
* A large number (500) of races to add variety to the randomly generated NPR
* No races associated with an existing lore
* A few races that are basically weird-looking people or earth animals in spacesuits.   But above all, the goal was to create creatures with truly alien physiology.       
* Using a randomized prompt generator to get unique species

The image pack has been tested on Aurora 2.  5.  1
I do not claim ownership of the images, they can be used freely.   If anyone is interested in any of the images in high resolution, contact me here or on Discord.   Most images were originally created at 1024x832.