fix(helpdesk): remove unnecessary typography overrides from settings CSS

Remove opacity and font-size overrides on small and span elements
that are already styled by core. Module CSS should only handle layout.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

modules/helpdesk/web/css/helpdesk.css

@@ -56,7 +56,6 @@
 
   .helpdesk-settings-rule > small {
     grid-column: 2;
-    opacity: 0.65;
   }
 
   /* Risk monitoring: rule with inline threshold */
@@ -79,7 +78,6 @@
 
   .helpdesk-settings-rule-toggle > small {
     grid-column: 2;
-    opacity: 0.65;
   }
 
   .helpdesk-settings-rule-threshold {
@@ -88,10 +86,6 @@
     max-width: 8rem;
   }
 
-  .helpdesk-settings-rule-threshold > span {
-    font-size: 0.8em;
-    opacity: 0.65;
-  }
 
   @media (max-width: 760px) {
     .helpdesk-settings-rule-with-threshold {