fix: avoid xreach false alarm and xiaoyuzhou install crash

tests/test_xiaoyuzhou_install.py

@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+
+from unittest.mock import patch
+
+import agent_reach.cli as cli
+
+
+class _DummyConfig:
+    def get(self, _key):
+        return None
+
+
+def test_install_xiaoyuzhou_deps_does_not_raise_when_no_groq_key(capsys):
+    with patch("agent_reach.config.Config", return_value=_DummyConfig()), \
+         patch("os.path.isfile", side_effect=lambda p: True if str(p).endswith("transcribe.sh") else False), \
+         patch("shutil.which", return_value=None):
+        cli._install_xiaoyuzhou_deps()
+
+    out = capsys.readouterr().out
+    assert "Xiaoyuzhou" in out
+    assert "Groq API key not set" in out