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- test_rule_based_segmentation_unchanged: 验证 enable_semantic_segmentation=False 时使用规则分段器 - test_rule_based_no_llm_calls: 验证规则分段不调用 LLM - test_rule_based_thresholds_unchanged: 验证规则分段阈值(时间/长度)未改变 Task 1 完成:规则分段向后兼容性验证(CONFIG-02) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>