Add hqt tool CLI subcommand (tool + clone dispatch)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/test_cli.py

@@ -0,0 +1,65 @@
+from click.testing import CliRunner
+
+from hqt import cli
+from hqt.config import Settings
+
+
+def test_tool_cmd_opens_tool_window(monkeypatch, tmp_path):
+    monkeypatch.setattr(
+        "hqt.config.get_settings", lambda: Settings(db_path=tmp_path / "t.db")
+    )
+    calls = {}
+
+    async def fake_for_window(self, window, tool):
+        calls["tool"] = (window, tool)
+        return "@9"
+
+    monkeypatch.setattr(
+        "hqt.sessions.service.SessionService.open_tool_window_for_window",
+        fake_for_window,
+    )
+
+    result = CliRunner().invoke(cli.main, ["tool", "lazygit", "hqt-5"])
+
+    assert result.exit_code == 0, result.output
+    assert calls["tool"] == ("hqt-5", "lazygit")
+
+
+def test_tool_cmd_clone_dispatches_to_clone(monkeypatch, tmp_path):
+    monkeypatch.setattr(
+        "hqt.config.get_settings", lambda: Settings(db_path=tmp_path / "t.db")
+    )
+    calls = {}
+
+    async def fake_clone(self, window):
+        calls["clone"] = window
+        return "RESULT"
+
+    monkeypatch.setattr(
+        "hqt.sessions.service.SessionService.clone_session_for_window", fake_clone
+    )
+
+    result = CliRunner().invoke(cli.main, ["tool", "clone", "hqt-5"])
+
+    assert result.exit_code == 0, result.output
+    assert calls["clone"] == "hqt-5"
+
+
+def test_tool_cmd_reports_service_error(monkeypatch, tmp_path):
+    from hqt.errors import ServiceError
+
+    monkeypatch.setattr(
+        "hqt.config.get_settings", lambda: Settings(db_path=tmp_path / "t.db")
+    )
+
+    async def boom(self, window, tool):
+        raise ServiceError("'hqt-5' is not an hqt session window")
+
+    monkeypatch.setattr(
+        "hqt.sessions.service.SessionService.open_tool_window_for_window", boom
+    )
+
+    result = CliRunner().invoke(cli.main, ["tool", "nvim", "hqt-5"])
+
+    assert result.exit_code == 1
+    assert "not an hqt session window" in result.output