Site Enhancement: Unread Posts

@hazelmoss Done, and a little more than you asked for. "Unread" is now in the sort menu next to Newest. It shows the posts you haven't opened from the last 30 days, newest first. When there's nothing left you'll see "You're all caught up." And because what most of us actually miss here is new replies on posts we've already read, every card in every view now shows two small things. A dot before the title means you haven't opened that post yet. A "5 new" next to the comment count means five people have replied since you last opened it. There's a "Mark all as read" link above the list for the days you come back to a pile. One honest limit: a post counts as read once you open it, so skimming it in the feed doesn't count. Thank you for the idea. Keep them coming.