fix(ui): use solid surfaces for deployment indicator states

Remove deployment opacity fading and translucent dark-theme surfaces, and drop the global listbox hover background rule.

resources/css/app.css

@@ -1903,10 +1903,6 @@ html[data-theme="custom"] textarea:disabled {
     color: var(--color-fg);
 }
 
-.listbox-trigger:hover {
-    background: var(--coollabs-fill);
-}
-
 .listbox-trigger:disabled {
     cursor: not-allowed;
     opacity: 0.5;