Onboarding & feed fixes (#1602)

* Fix: improve the 'end of feed' detection condition

* Fix the feeds link on mobile in the empty state

* Align the following empty state better on web

* Dont autofocus the search input in the search tab

* Fix the error boundary render

* Add 'end of feed' CTA to following feed

* Reduce the default feeds to discover now that we have feed-selection during onboarding

* Fix case where loading spinner fails to stop rendering in bottom of feed

* Fix: dont show loading spinner at footer of feed when refreshing

* Fix: dont fire reminders during onboarding

* Optimize adding feeds and update to mirror the api behaviors more closely

* Use the lock in preferences to avoid clobbering in-flight updates

* Refresh the feed after onboarding to ensure content is visible

* Remove the now-incorrect comment

* Tune copy

src/view/com/search/HeaderWithInput.tsx

@@ -93,7 +93,7 @@ export function HeaderWithInput({
           onBlur={() => setIsInputFocused(false)}
           onChangeText={onChangeQuery}
           onSubmitEditing={onSubmitQuery}
-          autoFocus={isMobile}
+          autoFocus={false}
           accessibilityRole="search"
           accessibilityLabel="Search"
           accessibilityHint=""