diff --git a/apps/web/src/components/voice/CloneModal/clone-modal.css b/apps/web/src/components/voice/CloneModal/clone-modal.css
index 540853183..35952976d 100644
--- a/apps/web/src/components/voice/CloneModal/clone-modal.css
+++ b/apps/web/src/components/voice/CloneModal/clone-modal.css
@@ -642,4 +642,3 @@
     font-size: 36px;
   }
 }
-
diff --git a/tests/unit/test_voice_clone_preview.py b/tests/unit/test_voice_clone_preview.py
index 3bf4ac00b..bf9951151 100755
--- a/tests/unit/test_voice_clone_preview.py
+++ b/tests/unit/test_voice_clone_preview.py
@@ -57,6 +57,7 @@ class TestVoiceClonePreview:
         repo = MagicMock()
         if profile is None:
             from packages.application.voice_clone.use_cases import VoiceCloneNotFoundError
+
             repo.get.return_value = None
             use_case_instance = MagicMock()
             use_case_instance.execute.side_effect = VoiceCloneNotFoundError("not found")
@@ -77,9 +78,11 @@ class TestVoiceClonePreview:
         def mock_execute(self, clone_id, uid):
             if profile is None:
                 from packages.application.voice_clone.use_cases import VoiceCloneNotFoundError
+
                 raise VoiceCloneNotFoundError("not found")
             if profile.user_id != uid:
                 from packages.application.voice_clone.use_cases import VoiceCloneNotFoundError
+
                 raise VoiceCloneNotFoundError("not found")
             return profile
 
@@ -97,12 +100,13 @@ class TestVoiceClonePreview:
             return result
         finally:
             GetVoiceCloneUseCase.__init__ = original_init
-            if hasattr(GetVoiceCloneUseCase, 'execute'):
-                delattr(GetVoiceCloneUseCase, 'execute')
+            if hasattr(GetVoiceCloneUseCase, "execute"):
+                delattr(GetVoiceCloneUseCase, "execute")
 
     def test_preview_success_ready_clone(self) -> None:
         """就绪的克隆音色可以正常试听。"""
         from app.api.routes.voice_clones import _clone_preview_cache
+
         _clone_preview_cache.clear()
 
         profile = _make_profile()
@@ -130,6 +134,7 @@ class TestVoiceClonePreview:
     def test_preview_custom_text(self) -> None:
         """自定义试听文本。"""
         from app.api.routes.voice_clones import _clone_preview_cache
+
         _clone_preview_cache.clear()
 
         profile = _make_profile()
@@ -160,6 +165,7 @@ class TestVoiceClonePreview:
     def test_preview_not_ready_pending(self) -> None:
         """pending 状态的克隆音色不能试听。"""
         from app.api.routes.voice_clones import _clone_preview_cache
+
         _clone_preview_cache.clear()
 
         profile = _make_profile(status=VoiceCloneStatus.PENDING, voice_id="")
@@ -175,6 +181,7 @@ class TestVoiceClonePreview:
     def test_preview_not_ready_processing(self) -> None:
         """processing 状态的克隆音色不能试听。"""
         from app.api.routes.voice_clones import _clone_preview_cache
+
         _clone_preview_cache.clear()
 
         profile = _make_profile(status=VoiceCloneStatus.PROCESSING)
@@ -189,6 +196,7 @@ class TestVoiceClonePreview:
     def test_preview_not_ready_failed(self) -> None:
         """failed 状态的克隆音色不能试听。"""
         from app.api.routes.voice_clones import _clone_preview_cache
+
         _clone_preview_cache.clear()
 
         profile = _make_profile(status=VoiceCloneStatus.FAILED, error_message="超时")
@@ -203,6 +211,7 @@ class TestVoiceClonePreview:
     def test_preview_tts_failure(self) -> None:
         """TTS 合成失败返回 502。"""
         from app.api.routes.voice_clones import _clone_preview_cache
+
         _clone_preview_cache.clear()
 
         profile = _make_profile()
@@ -217,7 +226,8 @@ class TestVoiceClonePreview:
 
     def test_preview_cache_default_text(self) -> None:
         """默认试听文本使用缓存。"""
-        from app.api.routes.voice_clones import _clone_preview_cache, CLONE_PREVIEW_CACHE_TTL
+        from app.api.routes.voice_clones import CLONE_PREVIEW_CACHE_TTL, _clone_preview_cache
+
         _clone_preview_cache.clear()
 
         profile = _make_profile()
@@ -241,6 +251,7 @@ class TestVoiceClonePreview:
     def test_preview_custom_text_no_cache(self) -> None:
         """自定义文本不使用缓存。"""
         from app.api.routes.voice_clones import _clone_preview_cache
+
         _clone_preview_cache.clear()
 
         profile = _make_profile()
@@ -259,6 +270,7 @@ class TestVoiceClonePreview:
     def test_preview_wrong_user(self) -> None:
         """非所有者不能访问他人克隆音色的试听。"""
         from app.api.routes.voice_clones import _clone_preview_cache
+
         _clone_preview_cache.clear()
 
         profile = _make_profile(user_id="user_001")