Challenge UI for Ridiculous Space Battles

If you played the original Gratuitous Space Battles game about 500 years ago, you will recall that the online challenges were a very popular part of the game. If not, let me explain: GSB was the first autobattler, so its a game where you set up a fleet of space ships (that you designed), give them orders, and then use that fleet to defeat the enemy in a mission (which I called a skirmish) that was designed by me (the developer). HOWEVER, there was also the option to just design a fleet that you thought was a good all-rounder against all foes, and submit a ‘challenge’ to another player (or everyone) and let them fight against your fleet. To do this, there was an online system where you logged in, and designed the fleet, typed a ‘taunt’ for your enemies, and submitted that challenge. It got stored on my server as a small text file, along with a small thumbnail preview image showing the fleet formation. Other players could browse available challenges, download them, and enjoy designing…