Bluesky app fork with some witchin' additions 馃挮 forked from jollywhoppers.com/witchsky.app

Sync top/bottom bar disappearance to the scroll (#1855) master

* Disable existing code that toggles shell * Make shell mode a float * Translate based on the gesture * Track header and footer heights * Add web support * Fix types and cleanup * Add back isScrolled logic * Add comments