fix: authors profile pictute all accross the SPA

features/sites_authors_screens.feature

@@ -514,6 +514,7 @@ Feature: Sites and Authors screens
         and "Shown as a square. Choose an image with the face or logo near the middle." and "Use image"
       When the user picks an image and activates "Use image"
       Then the avatar shows as a square and avatar_id is sent on save
+      And once saved, the avatar is the picked image in the list row, the read-only detail, the edit form and its byline preview, resolved with GET /v1/media/{avatar_id} and shared between all of them, with the initials only while it loads, when it fails or when avatar_id is null
       And the Sites default social image uses this same picker and sends default_social_image_id
 
     Scenario Outline: Authors form: save failed