Podest stair combination: platform stair and half-turn stair

You have 2.8m of space. In my opinion, a podium staircase is possible there as well.

That's true, however, I think the staircase in the anteroom shouldn't directly end with the hallway, or what do you think? It might feel too cramped, so would a half-turn staircase be better? From your perspective, what are the best exterior dimensions for a spiral staircase considering tread width and step height to allow for comfortable walking? (Assuming a floor height of 2.88m) I know it varies from person to person, but what would be ideal?

In the pinned thread for this forum section, there are also pictures with typical stair layouts.

I do not see a landing staircase here. If you calculate a spiral staircase with about 240-250 cm depth, you are on the safe side.