fix: start wecker without shell=True

tests/test_api.py

@@ -233,8 +233,10 @@ def test_start_ringing_starts_process_when_not_ringing():
         assert result is True
         mock_popen.assert_called_once()
         args, kwargs = mock_popen.call_args
-        assert "wecker.py" in args[0]
-        assert kwargs.get("shell") is True
+        assert any("wecker.py" in str(arg) for arg in args[0])
+        assert kwargs.get("shell") is not True
+        assert kwargs.get("cwd") is not None
+        assert kwargs.get("start_new_session") is True
 
 
 def test_start_ringing_ignores_when_already_ringing():