fix prefetch returning undefined (#8538)

src/state/queries/postgate/index.ts

@@ -2,10 +2,10 @@ import React from 'react'
 import {
   AppBskyEmbedRecord,
   AppBskyEmbedRecordWithMedia,
-  AppBskyFeedDefs,
+  type AppBskyFeedDefs,
   AppBskyFeedPostgate,
   AtUri,
-  BskyAgent,
+  type BskyAgent,
 } from '@atproto/api'
 import {useMutation, useQuery, useQueryClient} from '@tanstack/react-query'
 
@@ -139,7 +139,7 @@ export function usePostgateQuery({postUri}: {postUri: string}) {
     staleTime: STALE.SECONDS.THIRTY,
     queryKey: createPostgateQueryKey(postUri),
     async queryFn() {
-      return (await getPostgateRecord({agent, postUri})) ?? null
+      return await getPostgateRecord({agent, postUri}).then(res => res ?? null)
     },
   })
 }