fix(tests): Fix import paths and update for google-genai API

tests/test_deepseek_infra.py

@@ -7,8 +7,8 @@ import sys
 sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
 sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "src")))
 
-import ai_client
-import project_manager
+from src import ai_client
+from src import project_manager
 
 def test_credentials_error_mentions_deepseek(monkeypatch: pytest.MonkeyPatch) -> None:
  """