Better reply prompt (#8474)

* restyle reply prompt

* hide bottom bar border for cleaner look

* use new border hiding hook in DMs

src/view/com/post-thread/PostThreadComposePrompt.tsx

@@ -1,13 +1,15 @@
 import {View} from 'react-native'
+import {LinearGradient} from 'expo-linear-gradient'
 import {msg, Trans} from '@lingui/macro'
 import {useLingui} from '@lingui/react'
 
 import {PressableScale} from '#/lib/custom-animations/PressableScale'
 import {useHaptics} from '#/lib/haptics'
+import {useHideBottomBarBorderForScreen} from '#/lib/hooks/useHideBottomBarBorder'
 import {useProfileQuery} from '#/state/queries/profile'
 import {useSession} from '#/state/session'
 import {UserAvatar} from '#/view/com/util/UserAvatar'
-import {atoms as a, ios, useBreakpoints, useTheme} from '#/alf'
+import {atoms as a, ios, native, useBreakpoints, useTheme} from '#/alf'
 import {useInteractionState} from '#/components/hooks/useInteractionState'
 import {Text} from '#/components/Typography'
 
@@ -28,29 +30,49 @@ export function PostThreadComposePrompt({
     onOut: onHoverOut,
   } = useInteractionState()
 
+  useHideBottomBarBorderForScreen()
+
   return (
-    <PressableScale
-      accessibilityRole="button"
-      accessibilityLabel={_(msg`Compose reply`)}
-      accessibilityHint={_(msg`Opens composer`)}
+    <View
       style={[
-        gtMobile ? a.py_xs : {paddingTop: 8, paddingBottom: 11},
-        a.px_sm,
-        a.border_t,
-        t.atoms.border_contrast_low,
-        t.atoms.bg,
-      ]}
-      onPress={() => {
-        onPressCompose()
-        playHaptic('Light')
-      }}
-      onLongPress={ios(() => {
-        onPressCompose()
-        playHaptic('Heavy')
-      })}
-      onHoverIn={onHoverIn}
-      onHoverOut={onHoverOut}>
-      <View
+        gtMobile
+          ? [
+              a.py_xs,
+              a.px_sm,
+              a.border_t,
+              t.atoms.border_contrast_low,
+              t.atoms.bg,
+            ]
+          : [a.px_md, a.pt_sm],
+      ]}>
+      {!gtMobile && (
+        <LinearGradient
+          start={[0.5, 0]}
+          end={[0.5, 1]}
+          colors={[
+            // "white transparent" - the CSS transparent keyword
+            // is black transparent
+            'rgba(255, 255, 255, 0)',
+            t.atoms.bg.backgroundColor,
+          ]}
+          locations={[0.15, 0.4]}
+          style={[a.absolute, a.inset_0]}
+        />
+      )}
+      <PressableScale
+        accessibilityRole="button"
+        accessibilityLabel={_(msg`Compose reply`)}
+        accessibilityHint={_(msg`Opens composer`)}
+        onPress={() => {
+          onPressCompose()
+          playHaptic('Light')
+        }}
+        onLongPress={ios(() => {
+          onPressCompose()
+          playHaptic('Heavy')
+        })}
+        onHoverIn={onHoverIn}
+        onHoverOut={onHoverOut}
         style={[
           a.flex_row,
           a.align_center,
@@ -58,6 +80,7 @@ export function PostThreadComposePrompt({
           a.gap_sm,
           a.rounded_full,
           (!gtMobile || hovered) && t.atoms.bg_contrast_25,
+          native([a.border, t.atoms.border_contrast_low]),
           a.transition_color,
         ]}>
         <UserAvatar
@@ -68,7 +91,7 @@ export function PostThreadComposePrompt({
         <Text style={[a.text_md, t.atoms.text_contrast_medium]}>
           <Trans>Write your reply</Trans>
         </Text>
-      </View>
-    </PressableScale>
+      </PressableScale>
+    </View>
   )
 }