Readd the FAB for composing new posts

src/view/com/util/FAB.tsx

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+import React from 'react'
+import {observer} from 'mobx-react-lite'
+import {
+  GestureResponderEvent,
+  StyleSheet,
+  TouchableWithoutFeedback,
+  View,
+} from 'react-native'
+import LinearGradient from 'react-native-linear-gradient'
+import {FontAwesomeIcon} from '@fortawesome/react-native-fontawesome'
+import {IconProp} from '@fortawesome/fontawesome-svg-core'
+import {colors, gradients} from '../../lib/styles'
+import {useStores} from '../../../state'
+
+type OnPress = ((event: GestureResponderEvent) => void) | undefined
+export const FAB = observer(
+  ({icon, onPress}: {icon: IconProp; onPress: OnPress}) => {
+    const store = useStores()
+    return (
+      <TouchableWithoutFeedback onPress={onPress}>
+        <View
+          style={[
+            styles.outer,
+            store.shell.minimalShellMode ? styles.lower : undefined,
+          ]}>
+          <LinearGradient
+            colors={[gradients.purple.start, gradients.purple.end]}
+            start={{x: 0, y: 0}}
+            end={{x: 1, y: 1}}
+            style={styles.inner}>
+            <FontAwesomeIcon
+              size={24}
+              icon={icon}
+              color={colors.white}
+              style={styles.icon}
+            />
+          </LinearGradient>
+        </View>
+      </TouchableWithoutFeedback>
+    )
+  },
+)
+
+const styles = StyleSheet.create({
+  outer: {
+    position: 'absolute',
+    zIndex: 1,
+    right: 22,
+    bottom: 84,
+    width: 60,
+    height: 60,
+    borderRadius: 30,
+    shadowColor: '#000',
+    shadowOpacity: 0.3,
+    shadowOffset: {width: 0, height: 1},
+  },
+  lower: {
+    bottom: 34,
+  },
+  inner: {
+    width: 60,
+    height: 60,
+    borderRadius: 30,
+    justifyContent: 'center',
+    alignItems: 'center',
+  },
+  icon: {},
+})