Add a new home feed-api wrapper and give a header indicating the fallback behavior (#2534)

* Add a new home feed-api wrapper and give a header indicating the fallback behavior

* Sneak in a quick fix: use the correct text color in the delete modal

* Use imported constant

src/view/com/posts/DiscoverFallbackHeader.tsx

@@ -0,0 +1,43 @@
+import React from 'react'
+import {View} from 'react-native'
+import {Trans} from '@lingui/macro'
+import {Text} from '../util/text/Text'
+import {usePalette} from '#/lib/hooks/usePalette'
+import {TextLink} from '../util/Link'
+import {InfoCircleIcon} from '#/lib/icons'
+
+export function DiscoverFallbackHeader() {
+  const pal = usePalette('default')
+  return (
+    <View
+      style={[
+        {
+          flexDirection: 'row',
+          alignItems: 'center',
+          paddingVertical: 12,
+          paddingHorizontal: 12,
+          borderTopWidth: 1,
+        },
+        pal.border,
+        pal.viewLight,
+      ]}>
+      <View style={{width: 68, paddingLeft: 12}}>
+        <InfoCircleIcon size={36} style={pal.textLight} strokeWidth={1.5} />
+      </View>
+      <View style={{flex: 1}}>
+        <Text type="md" style={pal.text}>
+          <Trans>
+            We ran out of posts from your follows. Here's the latest from
+          </Trans>{' '}
+          <TextLink
+            type="md-medium"
+            href="/profile/bsky.app/feed/whats-hot"
+            text="Discover"
+            style={pal.link}
+          />
+          .
+        </Text>
+      </View>
+    </View>
+  )
+}