Preview line for each message

Author: amatsuda

app/decorators/message_decorator.rb

@@ -4,4 +4,8 @@ module MessageDecorator
   def from
     super&.gsub(/@[a-zA-Z.\-]+/, '@...')
   end
+
+  def first_line
+    body.lines.first&.strip
+  end
 end

app/views/messages/_thread.html.erb

@@ -14,6 +14,9 @@
               <%= link_to without_list_prefix(message.subject), "/#{list.name}/#{message.list_seq}", data: {turbo_frame: 'message_content'} %>
               <span class="text-sm text-gray-500 dark:text-gray-400 font-normal ml-2">— <%= message.from %></span>
             </h2>
+            <% if message.body.present? %>
+              <p class="text-sm text-gray-600 dark:text-gray-400 mb-2 line-clamp-1"><%= message.first_line %></p>
+            <% end %>
             <div class="flex items-center gap-3 text-sm text-gray-600 dark:text-gray-400">
               <span class="inline-flex items-center gap-1">
                 <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
@@ -37,6 +40,9 @@
             <span class="px-0.5">[#<%= message.list_seq %>] <%= without_list_prefix(message.subject) %></span>
           <% end %>
           <span class="text-gray-500 dark:text-gray-400">— <%= message.from %></span>
+          <% if message.body.present? %>
+            <p class="text-xs text-gray-500 dark:text-gray-400 mt-1 line-clamp-1"><%= message.first_line %></p>
+          <% end %>
         </div>
       </div>
     </div>