audio: Register player as clickable message element.

This matters most for Safari of at least v. 18.6, which
allows clicks on the player to bubble up the DOM.

web/src/click_handlers.ts

@@ -121,7 +121,8 @@ export function initialize(): void {
             $target.is(".message_inline_animated_image_still") ||
             $target.is("video") ||
             $target.is(".message_inline_video") ||
-            $target.is("img.twitter-avatar")
+            $target.is("img.twitter-avatar") ||
+            $target.is(".media-audio-element")
         ) {
             return true;
         }