Show draft/scheduled status banners for authenticated users

app/lib/firehose_web/controllers/blog_html/show.html.heex

@@ -1,4 +1,23 @@
 <div class="space-y-8">
   <a href={@base_path} class="text-sm text-primary hover:underline">&larr; Back to posts</a>
+
+  <%= if @authenticated and @visibility == :draft do %>
+    <div
+      class="rounded-lg bg-amber-50 border border-amber-200 px-4 py-3 text-amber-800 text-sm font-medium"
+      id="post-status-banner"
+    >
+      Draft — not published
+    </div>
+  <% end %>
+
+  <%= if @authenticated and @visibility == :scheduled do %>
+    <div
+      class="rounded-lg bg-blue-50 border border-blue-200 px-4 py-3 text-blue-800 text-sm font-medium"
+      id="post-status-banner"
+    >
+      This post is scheduled for {Calendar.strftime(@post.date, "%B %d, %Y")}
+    </div>
+  <% end %>
+
   <.post_show post={@post} base_path={@base_path} />
 </div>