Refactor minimal shell mode to refcounting (#10319)

src/view/screens/PostThread.tsx

@@ -1,28 +1,16 @@
-import {useCallback} from 'react'
-import {useFocusEffect} from '@react-navigation/native'
-
 import {
   type CommonNavigatorParams,
   type NativeStackScreenProps,
 } from '#/lib/routes/types'
 import {makeRecordUri} from '#/lib/strings/url-helpers'
-import {useSetMinimalShellMode} from '#/state/shell'
 import {PostThread} from '#/screens/PostThread'
 import * as Layout from '#/components/Layout'
 
 type Props = NativeStackScreenProps<CommonNavigatorParams, 'PostThread'>
 export function PostThreadScreen({route}: Props) {
-  const setMinimalShellMode = useSetMinimalShellMode()
-
   const {name, rkey} = route.params
   const uri = makeRecordUri(name, 'app.bsky.feed.post', rkey)
 
-  useFocusEffect(
-    useCallback(() => {
-      setMinimalShellMode(false)
-    }, [setMinimalShellMode]),
-  )
-
   return (
     <Layout.Screen testID="postThreadScreen">
       <PostThread uri={uri} />