Expand usage of structured_modal/1

lib/music_library_web/live/scrobble_rules_live/index.html.heex

@@ -99,12 +99,9 @@
   </ul>
 </div>
 
-<.modal
+<.structured_modal
   :if={@live_action in [:new, :edit]}
   id="scrobble_rule-modal"
-  class="md:min-w-2xl max-w-sm md:max-w-3xl mt-8"
-  placement="top"
-  open
   on_close={JS.patch(~p"/scrobble-rules")}
 >
   <.live_component
@@ -115,4 +112,4 @@
     scrobble_rule={@scrobble_rule}
     patch={~p"/scrobble-rules"}
   />
-</.modal>
+</.structured_modal>