style: auto-format with black + isort + prettier

tests/unit/test_subtitle_domain.py

@@ -415,6 +415,7 @@ class TestMergeShortSegmentsEdgeCases:
         result = timeline.merge_short_segments(min_chars=8)
         assert result.segment_count == 1
         assert result.segments[0].text == "一二三四五六七八九"
+
     def test_min_chars_one_no_merge(self):
         """min_chars=1 时每个都够，不合并."""
         tl = SubtitleTimeline(
@@ -457,8 +458,6 @@ class TestMergeShortSegmentsEdgeCases:
         assert result.segments[0].words[1].text == "好"
 
 
-
-
 class TestSplitLongSegmentsEdgeCases:
     """split_long_segments 边界情况深度测试."""
 
@@ -515,6 +514,7 @@ class TestSplitLongSegmentsEdgeCases:
         timeline = SubtitleTimeline(segments=[], total_duration=0.0)
         result = timeline.split_long_segments(max_chars=10)
         assert result.segment_count == 0
+
     def test_exactly_max_chars_no_split(self):
         """恰好等于 max_chars 不拆分."""
         text = "一二三四五六七八九十"  # 10字
@@ -558,8 +558,6 @@ class TestSplitLongSegmentsEdgeCases:
         assert result.total_chars == len(text)
 
 
-
-
 class TestSplitTextByPunctuationDeep:
     """_split_text_by_punctuation 深度测试."""
 
@@ -601,7 +599,6 @@ class TestSplitTextByPunctuationDeep:
         assert result[-1].endswith("！")
 
 
-
 class TestSplitTextByPunctuationEdgeCases:
     """_split_text_by_punctuation 边界场景补充."""
 
@@ -641,6 +638,8 @@ class TestSplitTextByPunctuationEdgeCases:
         result = SubtitleTimeline._split_text_by_punctuation(text, 5)
         assert "".join(result) == text
         assert len(result) >= 2
+
+
 class TestSubtitleTimelineProperties:
     """SubtitleTimeline 属性计算深度测试."""