Refactor feed header components (#2964)

* Move home-related files to view/com/home

* Add HomeHeader in front of FeedTabBar

* Move isDekstop check outside FeedsTabBar

* Remove PWI logic from tabbar

* Separate platform-specific layout from shared logic

src/view/com/home/HomeHeader.tsx

@@ -0,0 +1,71 @@
+import React from 'react'
+import {RenderTabBarFnProps} from 'view/com/pager/Pager'
+import {HomeHeaderLayout} from './HomeHeaderLayout'
+import {useWebMediaQueries} from 'lib/hooks/useWebMediaQueries'
+import {usePinnedFeedsInfos} from '#/state/queries/feed'
+import {useNavigation} from '@react-navigation/native'
+import {NavigationProp} from 'lib/routes/types'
+import {isWeb} from 'platform/detection'
+import {TabBar} from '../pager/TabBar'
+import {usePalette} from '#/lib/hooks/usePalette'
+
+export function HomeHeader(
+  props: RenderTabBarFnProps & {testID?: string; onPressSelected: () => void},
+) {
+  const {isDesktop} = useWebMediaQueries()
+  if (isDesktop) {
+    return null
+  }
+  return <HomeHeaderInner {...props} />
+}
+
+export function HomeHeaderInner(
+  props: RenderTabBarFnProps & {testID?: string; onPressSelected: () => void},
+) {
+  const navigation = useNavigation<NavigationProp>()
+  const {feeds, hasPinnedCustom} = usePinnedFeedsInfos()
+  const pal = usePalette('default')
+
+  const items = React.useMemo(() => {
+    const pinnedNames = feeds.map(f => f.displayName)
+
+    if (!hasPinnedCustom) {
+      return pinnedNames.concat('Feeds ✨')
+    }
+    return pinnedNames
+  }, [hasPinnedCustom, feeds])
+
+  const onPressFeedsLink = React.useCallback(() => {
+    if (isWeb) {
+      navigation.navigate('Feeds')
+    } else {
+      navigation.navigate('FeedsTab')
+      navigation.popToTop()
+    }
+  }, [navigation])
+
+  const onSelect = React.useCallback(
+    (index: number) => {
+      if (!hasPinnedCustom && index === items.length - 1) {
+        onPressFeedsLink()
+      } else if (props.onSelect) {
+        props.onSelect(index)
+      }
+    },
+    [items.length, onPressFeedsLink, props, hasPinnedCustom],
+  )
+
+  return (
+    <HomeHeaderLayout>
+      <TabBar
+        key={items.join(',')}
+        onPressSelected={props.onPressSelected}
+        selectedPage={props.selectedPage}
+        onSelect={onSelect}
+        testID={props.testID}
+        items={items}
+        indicatorColor={pal.colors.link}
+      />
+    </HomeHeaderLayout>
+  )
+}