common api: prefer formatting attachments using the attachment's name instead of URI

lib/pleroma/web/common_api/utils.ex

@@ -89,8 +89,8 @@ def maybe_add_attachments(text, attachments, _no_links) do
   def add_attachments(text, attachments) do
     attachment_text =
       Enum.map(attachments, fn
-        %{"url" => [%{"href" => href} | _]} ->
-          name = URI.decode(Path.basename(href))
+        %{"url" => [%{"href" => href} | _]} = attachment ->
+          name = attachment["name"] || URI.decode(Path.basename(href))
           href = MediaProxy.url(href)
           "<a href=\"#{href}\" class='attachment'>#{shortname(name)}</a>"