Clean up the custom-feed model

src/view/com/util/UserAvatar.tsx

@@ -188,7 +188,7 @@ export function UserAvatar({
           accessibilityRole="image"
         />
       ) : (
-        <DefaultAvatar size={size} />
+        <DefaultAvatar type={type} size={size} />
       )}
       <View style={[styles.editButtonContainer, pal.btn]}>
         <FontAwesomeIcon

src/view/com/util/post-embeds/index.tsx

@@ -170,6 +170,7 @@ export function PostEmbeds({
     AppBskyEmbedRecord.isView(embed) &&
     AppBskyFeedDefs.isGeneratorView(embed.record)
   ) {
+    // TODO memoize this?
     return (
       <CustomFeed
         item={new CustomFeedModel(store, embed.record)}