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

- 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 <noreply@anthropic.com>

1 files changed, 66 insertions, 0 deletions

diff --git a/packages/meshbay-hub/tests/test_invitation_ui.py b/packages/meshbay-hub/tests/test_invitation_ui.py
new file mode 100644
index 0000000..99538e9
--- /dev/null
+++ b/packages/meshbay-hub/tests/test_invitation_ui.py
@@ -0,0 +1,66 @@
+"""
+The two answers a person now gives, in the real application, in both engines.
+
+An invitee answers an invitation on the home page (harness/invitation_probe.py);
+a group owner answers a node that asked to host the group, and sees who was
+invited and has not answered (harness/group_hosts_probe.py). The hub side is
+`test_invitations_and_hosts.py`; this is where it meets the interface.
+"""
+
+import json
+import shutil
+import subprocess
+import sys
+from pathlib import Path
+
+import pytest
+
+HARNESS = Path(__file__).parent / "harness"
+BINARY = {"chrome": "google-chrome", "firefox": "firefox"}
+
+
+def _run(probe: str, engine: str):
+    if shutil.which(BINARY[engine]) is None:
+        pytest.skip(f"{engine} is not available")
+    proc = subprocess.run([sys.executable, str(HARNESS / probe), "--engine", engine],
+                          capture_output=True, text=True, timeout=240)
+    assert proc.returncode == 0, f"probe failed: {proc.stdout}{proc.stderr}"
+    return json.loads(proc.stdout)
+
+
+@pytest.fixture(scope="module", params=["chrome", "firefox"])
+def invitation(request):
+    return {c["case"]: c for c in _run("invitation_probe.py", request.param)}
+
+
+@pytest.fixture(scope="module", params=["chrome", "firefox"])
+def hosts(request):
+    return _run("group_hosts_probe.py", request.param)
+
+
+def test_an_invitation_is_listed_with_its_two_answers(invitation):
+    for c in invitation.values():
+        assert "error" not in c, c["error"]
+        assert c["listed"] and c["buttons"] == 2
+
+
+def test_accepting_joins_and_shows_the_group(invitation):
+    c = invitation["accept"]
+    assert c["answer_call"] == [
+        "POST /v1/groups/0f8fad5b-d9cb-469f-a165-70867728950e/invitation/accept"]
+    assert c["group_card"] and not c["invitation_still_shown"]
+
+
+def test_declining_leaves_no_group(invitation):
+    c = invitation["decline"]
+    assert c["answer_call"][0].endswith("/invitation/decline")
+    assert not c["group_card"] and not c["invitation_still_shown"]
+
+
+def test_the_owner_sees_the_invited_and_approves_a_host(hosts):
+    assert "error" not in hosts, hosts.get("error")
+    assert hosts["invited_row"]
+    assert hosts["host_rows"] == 2
+    assert hosts["buttons_on_request"] == 2      # approve and refuse
+    assert hosts["buttons_on_approved"] == 1     # refuse only
+    assert hosts["decision"] == ["POST /v1/groups/g1/hosts/n-asking"]