Rename, comment

src/screens/PostThread/index.tsx

@@ -42,7 +42,7 @@ import {ListFooter} from '#/components/Lists'
 const PARENT_CHUNK_SIZE = 5
 const CHILDREN_CHUNK_SIZE = 50
 
-export function Inner({uri}: {uri: string | undefined}) {
+export function PostThread({uri}: {uri: string | undefined}) {
   const {gtMobile} = useBreakpoints()
   const {hasSession} = useSession()
   const initialNumToRender = useInitialNumToRender() // TODO
@@ -358,7 +358,12 @@ export function Inner({uri}: {uri: string | undefined}) {
           )
         } else if (item.depth === 0) {
           return (
-            <View>
+            /*
+             * Keep this view wrapped so that the anchor post is always index 0
+             * in the list and `maintainVisibleContentPosition` can do its
+             * thing.
+             */
+            <View collapsable={false}>
               <View
                 /*
                  * IMPORTANT: this is a load-bearing key on all platforms. We

src/view/screens/PostThread.tsx

@@ -9,7 +9,7 @@ import {useGate} from '#/lib/statsig/statsig'
 import {makeRecordUri} from '#/lib/strings/url-helpers'
 import {useSetMinimalShellMode} from '#/state/shell'
 import {PostThread as PostThreadComponent} from '#/view/com/post-thread/PostThread'
-import {Inner} from '#/screens/PostThread'
+import {PostThread} from '#/screens/PostThread'
 import * as Layout from '#/components/Layout'
 
 type Props = NativeStackScreenProps<CommonNavigatorParams, 'PostThread'>
@@ -29,7 +29,7 @@ export function PostThreadScreen({route}: Props) {
   return (
     <Layout.Screen testID="postThreadScreen">
       {gate('post_threads_v2_unspecced') || __DEV__ ? (
-        <Inner uri={uri} />
+        <PostThread uri={uri} />
       ) : (
         <PostThreadComponent uri={uri} />
       )}