Archive chats without deleting their history

Feature request: archive chats.

Please add a way to archive a chat so it leaves the main chat feed but isn't deleted. Archived chats should stay searchable and restorable, and their history should stay intact. Why it matters: teams and roadmap owners want a clean feed, and today the only options are renaming, marking read, or permanently deleting. Archiving would keep finished work out of view without losing context.