fix: only the owner decides who hosts a group, and nobody is made a member unasked

2026-09-30T09:49:56Z

- hub: a node may host a group only if its account owns it or the owner approved that node (new `group_hosts`). Membership was the ceiling, and every member holds the group key, so any member's node could register as a host and be the one clients kept. A node claiming a group it may not host is recorded as a request; the owner is notified once and approves or refuses it (GET/POST/DELETE /v1/groups/{id}/hosts[/{node_id}]), which takes effect on a connected node at once. - hub: an owner adding a username creates an invitation (new `group_invitations`), accepted or declined by the invitee (/v1/groups/invitations, /{id}/invitation/accept|decline). Until then the group is not listed, not dialled, not searched and not in any token. Invitation links, open joins and group creation still make members directly: they are the account's own act. - hub: the MNP token names only the group it is minted for (group_id is now required), so a node operator no longer learns a member's other groups. - SPA: invitations on the home page; invited people and host requests in the group's settings; the transport sends group_id. Ten catalogues. - Browser probes for both screens, run in Chrome and Firefox. - Design §5.2, §7.2, §7.3, AV32, AV33; protocol §6.3; user guide. Co-Authored-By: Claude Opus 5.5

meshbay.git/packages/meshbay-hub/tests/harness/group_hosts_probe.py, branch main

fix: only the owner decides who hosts a group, and nobody is made a member unasked