Upgrade Lingui to v5 (#9905)

src/screens/Hashtag.tsx

@@ -1,8 +1,9 @@
 import React from 'react'
 import {type ListRenderItemInfo, View} from 'react-native'
 import {type AppBskyFeedDefs} from '@atproto/api'
-import {msg, Trans} from '@lingui/macro'
+import {msg} from '@lingui/core/macro'
 import {useLingui} from '@lingui/react'
+import {Trans} from '@lingui/react/macro'
 import {useFocusEffect} from '@react-navigation/native'
 import {type NativeStackScreenProps} from '@react-navigation/native-stack'
 
@@ -64,7 +65,7 @@ export default function HashtagScreen({
   }, [fullTag, isCashtag])
 
   const sanitizedAuthor = React.useMemo(() => {
-    if (!author) return
+    if (!author) return ''
     return sanitizeHandle(author)
   }, [author])