Layout fixes

src/view/screens/PostThread.tsx

@@ -25,6 +25,7 @@ import {ErrorMessage} from '../com/util/error/ErrorMessage'
 import {CenteredView} from '../com/util/Views'
 import {useComposerControls} from '#/state/shell/composer'
 import {useSession} from '#/state/session'
+import {isWeb} from '#/platform/detection'
 
 type Props = NativeStackScreenProps<CommonNavigatorParams, 'PostThread'>
 export function PostThreadScreen({route}: Props) {
@@ -109,7 +110,7 @@ export function PostThreadScreen({route}: Props) {
 
 const styles = StyleSheet.create({
   prompt: {
-    position: 'absolute',
+    position: isWeb ? 'fixed' : 'absolute',
     left: 0,
     right: 0,
   },

src/view/screens/Search/Search.tsx

@@ -518,7 +518,7 @@ export function SearchScreenMobile(
   )
 
   return (
-    <View style={{flex: 1}}>
+    <View style={isWeb ? null : {flex: 1}}>
       <CenteredView
         style={[styles.header, pal.view, styles.container]}
         sideBorders={isTablet}>