fix(secrets): keep readonly secret names legible instead of dimming them (#4942)

* fix(secrets): keep readonly secret names legible instead of dimming them

Readonly viewers saw the workspace secret name at opacity-50 while the
masked value rendered at full opacity, an inconsistent and hostile
treatment of content they need to read. Drop the opacity dim on the
non-renameable key; non-editability is already conveyed by the read-only
field and absent edit affordances.

* fix(secrets): use cursor-text on readonly key to hint selectability

apps/sim/app/workspace/[workspaceId]/settings/components/secrets/components/secrets-manager/secrets-manager.tsx

@@ -181,7 +181,7 @@ function WorkspaceVariableRow({
   return (
     <div className='contents'>
       <ChipInput
-        className={cn(!canRename && 'cursor-not-allowed opacity-50')}
+        className={cn(!canRename && 'cursor-text')}
         value={renamingKey === envKey ? pendingKeyValue : envKey}
         onChange={(e) => {
           if (renamingKey !== envKey) onRenameStart(envKey)