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

resources/lang/en.json

@@ -362,13 +362,10 @@
   },
   "public_lobby": {
     "title": "Waiting for Game Start...",
-    "teams_Duos": "{team_count} teams of 2 (Duos)",
-    "teams_Trios": "{team_count} teams of 3 (Trios)",
-    "teams_Quads": "{team_count} teams of 4 (Quads)",
     "waiting_for_players": "Waiting for players",
     "connecting": "Connecting to lobby...",
     "starting_in": "Starting in {time}",
-    "starting_game": "Starting game…",
+    "starting_game": "Starting…",
     "teams_hvn": "Humans vs Nations",
     "teams_hvn_detailed": "{num} Humans vs {num} Nations",
     "teams": "{num} teams",
@@ -464,7 +461,6 @@
     "teams": "Teams"
   },
   "mode_selector": {
-    "special_title": "Special Mix",
     "teams_title": "Teams",
     "teams_count": "{teamCount} teams",
     "teams_of": "{teamCount} teams of {playersPerTeam}",