fix(ui): fix Nuclear Theme (#3291)

* Add Nuclear Theme

* Fix login screen color & Softened "link" coloring

---------

Co-authored-by: grune <grune@grunk.me>

ui/src/themes/nuclear.js

@@ -5,7 +5,7 @@ const nukeCol = {
   text: '#ebdbb2',
   textAlt: '#bdae93',
   icon: '#b8bb26',
-  link: '#c22817',
+  link: '#c44129',
   border: '#a89984',
 }
 
@@ -181,12 +181,10 @@ export default {
       systemNameLink: {
         color: nukeCol['text'],
       },
-      icon: {},
       card: {
         minWidth: 300,
-        backgroundColor: nukeCol['text'],
+        backgroundColor: nukeCol['secondary'],
       },
-      avatar: {},
       button: {
         boxShadow: '3px 3px 5px #000000a3',
       },