PostThread cleanup (#3183)

* cleanup PostThread

rm some more unnecessary code

cleanup some more pieces

fix `isLoading` logic

few fixes

organize

refactor `PostThread`

allow chaining of `postThreadQuery`

Update `Hashtag` screen with the component changes

Make some changes to the List components

adjust height and padding of bottom loader to account for bottom bar

* rm unnecessary chaining logic

* maxReplies logic

* adjust error logic

* use `<` instead of `<=`

* add back warning comment

* remove unused prop

* adjust order

* update prop name

* don't show error if `isLoading`

src/components/Error.tsx

@@ -0,0 +1,90 @@
+import React from 'react'
+
+import {CenteredView} from 'view/com/util/Views'
+import {atoms as a, useBreakpoints, useTheme} from '#/alf'
+import {Text} from '#/components/Typography'
+import {View} from 'react-native'
+import {Button} from '#/components/Button'
+import {useNavigation} from '@react-navigation/core'
+import {NavigationProp} from 'lib/routes/types'
+import {StackActions} from '@react-navigation/native'
+import {router} from '#/routes'
+
+export function Error({
+  title,
+  message,
+  onRetry,
+}: {
+  title?: string
+  message?: string
+  onRetry?: () => unknown
+}) {
+  const navigation = useNavigation<NavigationProp>()
+  const t = useTheme()
+  const {gtMobile} = useBreakpoints()
+
+  const canGoBack = navigation.canGoBack()
+  const onGoBack = React.useCallback(() => {
+    if (canGoBack) {
+      navigation.goBack()
+    } else {
+      navigation.navigate('HomeTab')
+
+      // Checking the state for routes ensures that web doesn't encounter errors while going back
+      if (navigation.getState()?.routes) {
+        navigation.dispatch(StackActions.push(...router.matchPath('/')))
+      } else {
+        navigation.navigate('HomeTab')
+        navigation.dispatch(StackActions.popToTop())
+      }
+    }
+  }, [navigation, canGoBack])
+
+  return (
+    <CenteredView
+      style={[
+        a.flex_1,
+        a.align_center,
+        !gtMobile ? a.justify_between : a.gap_5xl,
+        t.atoms.border_contrast_low,
+        {paddingTop: 175, paddingBottom: 110},
+      ]}
+      sideBorders>
+      <View style={[a.w_full, a.align_center, a.gap_lg]}>
+        <Text style={[a.font_bold, a.text_3xl]}>{title}</Text>
+        <Text
+          style={[
+            a.text_md,
+            a.text_center,
+            t.atoms.text_contrast_high,
+            {lineHeight: 1.4},
+            gtMobile && {width: 450},
+          ]}>
+          {message}
+        </Text>
+      </View>
+      <View style={[a.gap_md, gtMobile ? {width: 350} : [a.w_full, a.px_lg]]}>
+        {onRetry && (
+          <Button
+            variant="solid"
+            color="primary"
+            label="Click here"
+            onPress={onRetry}
+            size="large"
+            style={[a.rounded_sm, a.overflow_hidden, {paddingVertical: 10}]}>
+            Retry
+          </Button>
+        )}
+        <Button
+          variant="solid"
+          color={onRetry ? 'secondary' : 'primary'}
+          label="Click here"
+          onPress={onGoBack}
+          size="large"
+          style={[a.rounded_sm, a.overflow_hidden, {paddingVertical: 10}]}>
+          Go Back
+        </Button>
+      </View>
+    </CenteredView>
+  )
+}