UI refinements (#2859)

## Description:

UI Refinements requested by @evanpelle  check https://ui.openfront.dev

## 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:

w.o.n

resources/lang/en.json

@@ -26,12 +26,15 @@
     "title": "OpenFront (ALPHA)",
     "join_discord": "Discord",
     "login_discord": "Login with Discord",
+    "sign_in": "Sign in",
+    "discord_avatar_alt": "Discord profile avatar",
+    "user_avatar_alt": "{username}'s avatar",
     "checking_login": "Checking login...",
     "logged_in": "Logged in!",
     "log_out": "Log out",
     "create": "Create Lobby",
     "join": "Join Lobby",
-    "solo": "Solo Lobby",
+    "solo": "Solo",
     "instructions": "Instructions",
     "game_info": "Game info",
     "wiki": "Wiki",
@@ -42,7 +45,7 @@
     "play": "Play",
     "news": "News",
     "store": "Store",
-    "options": "Options",
+    "settings": "Settings",
     "keys": "Keys",
     "stats": "Stats",
     "account": "Account",
@@ -179,13 +182,8 @@
     "title": "Account",
     "connected_as": "Connected as",
     "stats_overview": "Stats Overview",
-    "save_progress_title": "Save Your Progress",
-    "save_progress_desc": "Link your account to keep your stats, rank, and cosmetics safe.",
     "link_discord": "Link Discord Account",
-    "link_via_email_placeholder": "Link via Email",
-    "link_button": "Link",
     "log_out": "Log Out",
-    "welcome_back": "Welcome Back",
     "sign_in_desc": "Sign in to save your stats and progress",
     "or": "OR",
     "email_placeholder": "Enter your email address",
@@ -429,7 +427,7 @@
     "factory": "Factory"
   },
   "user_setting": {
-    "title": "User Settings",
+    "title": "Settings",
     "tab_basic": "Basic Settings",
     "tab_keybinds": "Keybinds",
     "dark_mode_label": "Dark Mode",