add copy opml feed button - correct url

lib/pinchflat_web/controllers/sources/source_html.ex

@@ -43,6 +43,10 @@ defmodule PinchflatWeb.Sources.SourceHTML do
     url(conn, ~p"/sources/#{source.uuid}/feed") <> ".xml"
   end
 
+  def opml_feed_url(conn) do
+    url(conn, ~p"/podcasts/opml") <> ".xml"
+  end
+
   def output_path_template_override_placeholders(media_profiles) do
     media_profiles
     |> Enum.map(&{&1.id, &1.output_path_template})

lib/pinchflat_web/controllers/sources/source_html/index.html.heex

@@ -3,7 +3,7 @@
   <nav>
      <.button color="bg-transparent" x-data="{ copied: false }" x-on:click={~s"
           copyWithCallbacks(
-            `#{~p"/podcasts/opml"}`,
+            '#{opml_feed_url(@conn)}',
             () => copied = true,
             () => copied = false
           )