New on Warpcast: updated home feed design

- Casts in channels now have a label at the top with the logo
- Casts are slimmed down: username-only, merged the action buttons with counts, moved Bookmarks to the kebab menu (top right)
- Channel circles have been retired

Side effect (maybe intentional?) of this is people no longer have emojis in their names.

So feed will feel less spammy as a result

Underrated change. Was probably contributing a lot to the narrative that Farcaster is all bots & airdrop farmers.