Add consistent view headers

src/view/screens/PostThread.tsx

@@ -1,5 +1,7 @@
 import React, {useEffect} from 'react'
+import {View} from 'react-native'
 import {makeRecordUri} from '../lib/strings'
+import {ViewHeader} from '../com/util/ViewHeader'
 import {PostThread as PostThreadComponent} from '../com/post-thread/PostThread'
 import {ScreenParams} from '../routes'
 import {useStores} from '../../state'
@@ -15,5 +17,10 @@ export const PostThread = ({visible, params}: ScreenParams) => {
     }
   }, [visible, store.nav, name])
 
-  return <PostThreadComponent uri={uri} />
+  return (
+    <View>
+      <ViewHeader title="Post" subtitle={`by ${name}`} />
+      <PostThreadComponent uri={uri} />
+    </View>
+  )
 }