diff --git a/apps/worker/video_processing/multi_track_mixer_pure.py b/apps/worker/video_processing/multi_track_mixer_pure.py
index 805747d89..c862437f6 100755
--- a/apps/worker/video_processing/multi_track_mixer_pure.py
+++ b/apps/worker/video_processing/multi_track_mixer_pure.py
@@ -6,7 +6,6 @@
 
 from __future__ import annotations
 
-
 # ── 单轨时间计算 ──────────────────────────────────────────────────────────────
 
 
diff --git a/apps/worker/video_processing/speed_engine.py b/apps/worker/video_processing/speed_engine.py
index eb0d05149..5c2d92f4d 100755
--- a/apps/worker/video_processing/speed_engine.py
+++ b/apps/worker/video_processing/speed_engine.py
@@ -13,7 +13,6 @@
 
 from __future__ import annotations
 
-
 from packages.domain.speed_config import (
     DEFAULT_SPEED,
     SpeedConfig,
diff --git a/tests/unit/domain/test_video_filter_builder.py b/tests/unit/domain/test_video_filter_builder.py
index 3ddf486c2..380972d56 100755
--- a/tests/unit/domain/test_video_filter_builder.py
+++ b/tests/unit/domain/test_video_filter_builder.py
@@ -6,7 +6,6 @@ domain 层纯逻辑模块，0 FFmpeg 依赖，快速轻量。
 from __future__ import annotations
 
 import dataclasses
-
 from unittest.mock import MagicMock
 
 import pytest
diff --git a/tests/unit/test_transition_presets.py b/tests/unit/test_transition_presets.py
index eb51e108f..b315ecae2 100755
--- a/tests/unit/test_transition_presets.py
+++ b/tests/unit/test_transition_presets.py
@@ -4,7 +4,6 @@ from __future__ import annotations
 
 import dataclasses
 
-
 import pytest
 
 from packages.domain.transition_presets import (