fix(backend): non-login SSH and strict loginctl parse, SSH retry (0.20.31)

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/tests/test_ssh_connect.py

@@ -36,6 +36,16 @@ def _install_fake_paramiko(monkeypatch, *, connect_side_effect=None, exec_setup=
     return client
 
 
+def test_ssh_output_hostname_ignores_motd():
+    stdout = "Welcome!\nFASTPANEL\n\ncz-server\n"
+    assert ssh_connect._ssh_output_hostname(stdout) == "cz-server"
+
+
+def test_remote_shell_command_non_login_for_sessions():
+    cmd = _remote_shell_command("root", "loginctl list-sessions", "secret", login_shell=False)
+    assert cmd == "bash -c 'loginctl list-sessions'"
+
+
 def test_remote_shell_command_non_root_probe_has_no_sudo():
     cmd = _remote_shell_command("deploy", "hostname", "secret", need_root=False)
     assert "sudo" not in cmd
@@ -125,6 +135,53 @@ def test_iter_ssh_targets_requires_address():
         pass
 
 
+def test_run_ssh_command_retries_transient_no_existing_session(monkeypatch):
+    attempts = {"count": 0}
+
+    class _NoSessionError(Exception):
+        pass
+
+    def connect_side_effect(*args, **kwargs):
+        attempts["count"] += 1
+        if attempts["count"] == 1:
+            raise _NoSessionError("No existing session")
+
+    def setup(client):
+        stdout = MagicMock()
+        stdout.read.return_value = b"ready\n"
+        stdout.channel.recv_exit_status.return_value = 0
+        stderr = MagicMock()
+        stderr.read.return_value = b""
+
+        def exec_ok(cmd, **kwargs):
+            return (None, stdout, stderr)
+
+        client.exec_command.side_effect = exec_ok
+
+    fake = MagicMock()
+    fake.SSHClient = MagicMock()
+    fake.AutoAddPolicy = MagicMock()
+    fake.AuthenticationException = _AuthError
+
+    def make_client():
+        client = MagicMock()
+        client.connect.side_effect = connect_side_effect
+        setup(client)
+        return client
+
+    fake.SSHClient.side_effect = make_client
+    monkeypatch.setitem(sys.modules, "paramiko", fake)
+
+    result = run_ssh_command(
+        target="185.87.149.9",
+        user="root",
+        password="pw",
+        remote_cmd="hostname",
+    )
+    assert result.ok is True
+    assert attempts["count"] == 2
+
+
 def test_probe_ssh_connection_success(monkeypatch):
     def setup(client):
         stdout = MagicMock()