* Make shadow a type-only concept
* Prevent unnecessary init state recalc
* Use derived state instead of effects
* Batch emitter updates
* Use object first seen time instead of dataUpdatedAt
* Stop threading dataUpdatedAt through
* Use same value consistently
* Add top inset for profile preview to match target screen
* Avoid flicker by waiting for profile screen navigation
* Fix glimmer to align with the content
* A more reliable (but non-scientific) fix for the flash
* Lower the timeout
* Prefilter the mergefeed to ensure a better mix of following and custom feeds
* Test suite improvements & tests for the mergefeed (#1499)
* Disable invite codes test for now
* Update test sim to latest iphone
* Introduce TestCtrls driver
* Add mergefeed tests
* Update the ProfilePreview to use a swipe-up to navigate
* Use the profile cache to optimize load performance
* Hack to align the header in the profile preview against the screen view
* Fix profiles cache logic to ensure cache is used
* Fix dark mode on profile preview
* Update postmeta to put the timestamp on the right side on mobile
* Drop the two-line PostMeta mode
* Add ProfilePreview modal
* Tune PostMeta to give the best behavior possible for a given platform
* Remove old showFollowBtn attributes
* Fix style issue
* Switch the follow button in the profile header to use the inverted color for consistency with the rest of the app
* Fix lint
* Fix darkmode
* Tune the profile preview footer
* Better analytics choice