Spectate mode preferences

[Chapuz]

How do you prefere Spectate mode to be?

My proposal:

- Every player has an "Enable spectate" box in the settings.
- A PvP duel can only be spectated if both players have the setting on.
- There is a new button in the menu: "Spectate PvP". Pressing the buttons will show you a list of the current PvP games and a "Spectate" button. You click on one of the duels to select it and the Spectate button to enter the duel as spectator.
- The spectator can see the board, both players' hands, HP and "damage calculation for next turn" for both players.
- The only thing the spectator can touch is a "Leave" button, in the possition of the Resign buttons of the players.

[serprex]

Joining games midmatch is a real hassle, Game is not a JSON serializable class. I was messing with making transforms to make Games be non-recursive structures when considering using WebWorkers for AI, but that didn't pan out since there were issues making it feel like there wouldn't be a performance gain

[Fippe94]

What if server saved all commands from a pvpmatch and when a spectator joins midmatch they start with getting all saved commands?

[serprex]

That'd probably be more space efficient in general. It'd work

Would also be a step towards replays

[OdinVanguard]

Replays would be very nice. Could be fun to save replays of final matches for tourneys guildmaster battles, etc.