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

I was gonna ask why decided to show the username instead of the display name, but then I figured it’s probably to stop people from pretending to be someone else. Still, usernames don’t really pop visually for me. Wouldn’t a badge have been a better move?