homepage UI improvements (#3352)

## Description:

A bunch of small UI improvements:

* Make the content width a bit smaller so gutter ads fit
* remove the "duos" "trios" "quads" description on the game card since
it's redundant
* update UI in game card
* minor footer layout changes
* update z-index to ensure content appears above ads
* removed hasUnusualThumbnailSize, instead just check the map ratio
* Use "object cover" for non-irregular maps to the entire game card is
filed
* remove white ouline from the version
* changed solo button to sky blue
* make timer "s" lowercase


I think we may need to change the openfront logo color a bit too to
match the color palette, but we can do that in a follow up.

<img width="1591" height="969" alt="Screenshot 2026-03-05 at 2 04 48 PM"
src="https://github.com/user-attachments/assets/7bb9ea4c-5a17-47e1-bdad-9d6437b363b3"
/>


## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

evan

src/client/components/MainLayout.ts

@@ -22,7 +22,7 @@ export class MainLayout extends LitElement {
         class="relative [.in-game_&]:hidden flex flex-col flex-1 overflow-hidden w-full px-0 lg:px-[clamp(1.5rem,3vw,3rem)] pt-0 lg:pt-[clamp(0.75rem,1.5vw,1.5rem)] pb-0 lg:pb-[clamp(0.75rem,1.5vw,1.5rem)]"
       >
         <div
-          class="w-full lg:max-w-[24cm] mx-auto flex flex-col flex-1 gap-0 lg:gap-[clamp(1.5rem,3vw,3rem)] overflow-y-auto overflow-x-hidden"
+          class="w-full lg:max-w-[20cm] mx-auto flex flex-col flex-1 gap-0 lg:gap-[clamp(1.5rem,3vw,3rem)] overflow-y-auto overflow-x-hidden"
         >
           ${this._initialChildren}
         </div>