Improve notifications, fix styles not being added

Based on https://petr.codes/blog/rails/modern-rails-flash-messages/part-3/

app/views/layouts/admin.html.erb

@@ -66,15 +66,15 @@
         </div>
       </nav>
 
-      <%= yield %>
-    </div>
-
-    <div id="wrapper">
-      <% flash.each do |type, msg| %>
-        <div class="flash-msg <%= type %>">
-          <p><%= msg %></p>
+      <div class="fixed inset-0 px-4 py-6 pointer-events-none sm:px-6 sm:py-4 sm:items-start sm:justify-end">
+        <div class="flex flex-col items-end justify-center">
+          <% flash.each do |type, data| %>
+            <%= render NotificationComponent.new(type: type, data: data) %>
+          <% end %>
         </div>
-      <% end %>
+      </div>
+
+      <%= yield %>
     </div>
   </body>
 </html>