fix(web): use primary color for subagent setting label

packages/client/ui-settings-plugins/src/client/SubagentModelSelectionCard.module.css

@@ -11,7 +11,7 @@
   gap: 16px;
   font-size: 13px;
   line-height: 1.5;
-  color: var(--dsw-alias-label-secondary);
+  color: var(--dsw-alias-label-primary);
 }
 
 .toggleLabel {