Strip HTML in and allow emoji in summaries.

lib/pleroma/web/common_api/common_api.ex

@@ -124,7 +124,7 @@ def post(user, %{"status" => status} = data) do
            Map.put(
              object,
              "emoji",
-             Formatter.get_emoji(status)
+             Formatter.get_emoji(status) ++ Formatter.get_emoji(data["spoiler_text"])
              |> Enum.reduce(%{}, fn {name, file}, acc ->
                Map.put(acc, name, "#{Pleroma.Web.Endpoint.static_url()}#{file}")
              end)

lib/pleroma/web/twitter_api/views/activity_view.ex

@@ -285,7 +285,7 @@ def render(
       "activity_type" => "post",
       "possibly_sensitive" => possibly_sensitive,
       "visibility" => Pleroma.Web.MastodonAPI.StatusView.get_visibility(object),
-      "summary" => summary
+      "summary" => HTML.strip_tags(summary) |> Formatter.emojify(object["emoji"])
     }
   end