Prompt user to 'see latest posts' on the newsfeed (app)
When a user is scrolling through their feed, it may be that new content is available. However, currently the app neither polls or notifies the user when there is new content to view.
Please see design here -> https://www.sketch.com/s/0c0b6cff-4a1a-4adf-8899-359668617f9d/a/d9eyv2
Acceptance criteria
- Poll for content every 30 seconds if on a 'latest' feed
- Display the see latest content hover tag
- The api endpoint should use a _count query for efficiency
- Do not poll when the browser is inactive
- Introduce as an experiment with id
front-4089-polling
- Use GTE>= last search query time
- Badge/ticket to read "See X new posts"
- In the context of newsfeed, ensure we don't scroll to the boost rotator, but below it