[APP-2160] Stabilize avatar style and drop stray Fragments

Hoist the publication avatar style to a module-level const so its
identity is stable across renders, and remove two empty Fragment
wrappers that served no purpose.

src/components/Post/Embed/StandardSiteEmbed/index.tsx

@@ -33,6 +33,10 @@ export type ThemeColors = {
   accentForeground: string
 }
 
+const PUBLICATION_AVATAR_STYLE = {
+  borderRadius: a.rounded_sm.borderRadius,
+}
+
 export function useStandardSitePublisherConfig(
   view: AppBskyEmbedExternal.ViewExternal,
 ) {
@@ -365,7 +369,6 @@ export function PublicationCard({
                   a.gap_sm,
                   gtPhone && a.flex_1,
                 ]}>
-                <>
                 <PublicationIcon
                   view={view}
                   size={40}
@@ -390,7 +393,6 @@ export function PublicationCard({
                     onInteractWithout={onInteractWithout}
                   />
                 </View>
-                </>
               </View>
 
               {!hideSubscribe && (
@@ -482,7 +484,7 @@ function PublicationIcon({
         type="labeler"
         size={size}
         avatar={view.source.icon}
-        extraAviStyle={{borderRadius: a.rounded_sm.borderRadius}}
+        extraAviStyle={PUBLICATION_AVATAR_STYLE}
       />
       <MediaInsetBorder
         style={[
@@ -579,7 +581,6 @@ export function PublicationFooter({
           a.gap_sm,
           gtPhone && a.flex_1,
         ]}>
-        <>
         <PublicationIcon
           view={view}
           size={32}
@@ -604,7 +605,6 @@ export function PublicationFooter({
             onInteractWithout={onInteractWithout}
           />
         </View>
-        </>
       </Link>
 
       {!hideSubscribe && (