Renders space invite system messages in DMs as embed-style cards on the chat
surface. Three render states: snapshot-only on mount (Join enabled, loading
dot), live-confirmed (memberCount refreshed from preview), revoked (gray-out
+ glass-pill indicator). Join targets the space's home origin via
joinByCode(code, spaceInstanceOrigin || undefined) — the three-way
federation correctness rule. Re-exports getApiForOrigin from api/client to
expose the cross-store resolver under a natural import surface.
Jannis Braun