Include image description in status media cards

Signed-off-by: marcin mikołajczak <git@mkljczk.pl>

test/pleroma/web/mastodon_api/controllers/status_controller_test.exs

@@ -1717,6 +1717,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusControllerTest do
 
       card_data = %{
         "image" => "http://ia.media-imdb.com/images/rock.jpg",
+        "image_description" => "",
         "provider_name" => "example.com",
         "provider_url" => "https://example.com",
         "title" => "The Rock",
@@ -1770,6 +1771,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusControllerTest do
                "title" => "Pleroma",
                "description" => "",
                "image" => nil,
+               "image_description" => "",
                "provider_name" => "example.com",
                "provider_url" => "https://example.com",
                "url" => "https://example.com/ogp-missing-data",

test/pleroma/web/mastodon_api/views/status_view_test.exs

@@ -773,6 +773,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusViewTest do
       page_url = "http://example.com"
 
       card = %{
+        "image:alt" => "Example image description",
         url: page_url,
         site_name: "Example site name",
         title: "Example website",
@@ -780,7 +781,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusViewTest do
         description: "Example description"
       }
 
-      %{provider_name: "example.com"} =
+      %{provider_name: "example.com", image_description: "Example image description"} =
         StatusView.render("card.json", %{page_url: page_url, rich_media: card})
     end