Display a link to the upstream archive for messages

Author: dutow

app/assets/stylesheets/components/messages.css

@@ -88,6 +88,16 @@
   color: var(--color-success);
 }
 
+.message-archive-link {
+  margin-left: auto;
+
+  & a {
+    color: var(--color-text-link);
+    display: inline-flex;
+    align-items: center;
+  }
+}
+
 .message-content {
   padding: var(--spacing-5);
   transition: background-color 0.3s ease, color 0.3s ease;

app/views/topics/_message.html.slim

@@ -29,6 +29,10 @@
       - if message.attachments.any?
         .attachment-indicator
           span.attachment-count #{message.attachments.size} attachment(s)
+      - if message.message_id.present?
+        .message-archive-link
+          = link_to "https://postgr.es/m/#{message.message_id}", target: "_blank", rel: "noopener", data: { turbo: false }, title: "View on postgr.es", "aria-label": "View on postgr.es" do
+            i.fa-solid.fa-building-columns
 
   .message-content class=read_classes.join(" ") data=read_data
     - if message.subject != @topic.title && message.subject.present?