feat (large impact/desktop) threads below channels in sidebar

After using Buzz extensively for the past 24 hours, the no. 1 thing it's missing is thread management.

Request: Show recent threads in the sidebar, below the channel, with an AI generated name (customizable).

Think of the way the Codex Mac App works - you have a folder, and then chats inside

This can be translated to Channels and Threads - the UI can look almost identical

This would have a dramatic impact on how usable Buzz is for lots of work and is the biggest pain point with dealing with agents in Slack for many.