``Reply`` button shouldn't be shown for normal users when comments are disabled

So that this UX issue doesn't happen:

<img width="404" height="146" alt="Image" src="https://github.com/user-attachments/assets/1713839c-316b-4e12-8492-25f0cbfb28c5" />

Should still be shown for any user who can post comments despite comments being disabled, such as moderators.