feat: support numbered resume selection in cli and gateway

tests/cli/test_cli_resume_command.py

@@ -0,0 +1,71 @@
+from unittest.mock import MagicMock, patch
+
+from cli import HermesCLI
+
+
+def _make_cli():
+    cli_obj = HermesCLI.__new__(HermesCLI)
+    cli_obj.session_id = "current_session"
+    cli_obj._resumed = False
+    cli_obj._pending_title = None
+    cli_obj.conversation_history = []
+    cli_obj.agent = None
+    cli_obj._session_db = MagicMock()
+    return cli_obj
+
+
+class TestCliResumeCommand:
+    def test_show_recent_sessions_includes_indexes_and_resume_hint(self, capsys):
+        cli_obj = _make_cli()
+        cli_obj._list_recent_sessions = MagicMock(return_value=[
+            {"id": "sess_002", "title": "Coding", "preview": "build feature", "last_active": None},
+            {"id": "sess_001", "title": "Research", "preview": "read docs", "last_active": None},
+        ])
+
+        shown = cli_obj._show_recent_sessions(reason="resume")
+        output = capsys.readouterr().out
+
+        assert shown is True
+        assert "1" in output
+        assert "2" in output
+        assert "Coding" in output
+        assert "Research" in output
+        assert "/resume 2" in output
+        assert "/resume <session title>" in output
+
+    def test_handle_resume_by_index_switches_to_numbered_session(self):
+        cli_obj = _make_cli()
+        cli_obj._list_recent_sessions = MagicMock(return_value=[
+            {"id": "sess_002", "title": "Coding"},
+            {"id": "sess_001", "title": "Research"},
+        ])
+        cli_obj._session_db.get_session.return_value = {"id": "sess_001", "title": "Research"}
+        cli_obj._session_db.get_messages_as_conversation.return_value = [
+            {"role": "user", "content": "hello"},
+            {"role": "assistant", "content": "hi"},
+        ]
+
+        with (
+            patch("hermes_cli.main._resolve_session_by_name_or_id", return_value=None),
+            patch("cli._cprint") as mock_cprint,
+        ):
+            cli_obj._handle_resume_command("/resume 2")
+
+        printed = " ".join(str(call) for call in mock_cprint.call_args_list)
+        assert cli_obj.session_id == "sess_001"
+        assert "Resumed session sess_001" in printed
+        assert "Research" in printed
+
+    def test_handle_resume_by_index_out_of_range(self):
+        cli_obj = _make_cli()
+        cli_obj._list_recent_sessions = MagicMock(return_value=[
+            {"id": "sess_002", "title": "Coding"},
+        ])
+
+        with patch("cli._cprint") as mock_cprint:
+            cli_obj._handle_resume_command("/resume 9")
+
+        printed = " ".join(str(call) for call in mock_cprint.call_args_list)
+        assert "out of range" in printed.lower()
+        assert "/resume" in printed
+        assert cli_obj.session_id == "current_session"