New UX on Warpcast mobile: channel icons

- Channels now have visual icons
- Discover, join and leave channels by tapping the "All" button (you no longer need the NFT to join)
- New Books and LA channel experiments
- Renamed Following to Home and Highlights to Trending

Working on Farcaster and Warpcast. Longer thoughts at https://dwr.email

How does Warpcast pick the casts to be shown in these channels?

For example, I attended FarCon, had a ticket in my wallet, but don’t believe my casts showed up in that channel. 

Another ex: I see casts in Books that are just a quote w/ attached cover image. How does Warpcast know to include those in that channel?