v0.9.3

Spaces header: "About this space" hover card (#963)

The hover on the space name was an identity crumb — org, a clipped
"you are <id>", and a Copy address button whose address nobody has a
use for once copied (joining goes through an invite link). Now it is
an About-this-space card in the shape of About This Mac: the org's
mark as the hero, "# <space>" as the title with "A space in <org>"
under it, then a label/value table — Organization, Server, Members
(with "· n here"), You (your name in the amber @-chip a mention of you
wears in the stream), Member id (monospace). Server and Member id copy
on click, with a copy glyph on hover and a green check for a beat on
success; a failed write says so. OrgMonogram gains an xl size.


Claude-Session: https://claude.ai/code/session_01FdKK6pfaNc4cBZqZBf1USA

Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>