style: 代码格式化

tests/test_services.py

@@ -1,6 +1,7 @@
 """
 Unit tests for service modules: Config, Hasher, Timer, Version, AudioService, TTSService
 """
+
 import pytest
 import json
 import tempfile
@@ -170,4 +171,4 @@ class TestTTSService:
 
         # Test speak with empty string
         with pytest.raises(ValueError):
-            tts_service.speak("")
+            tts_service.speak("")