eadb355396
Chinese novels commonly use 番外 (bonus), 番外篇, or 外传 as chapter headings, optionally combined with 第N章. The previous regex only matched 第N章 at line start, so lines like "番外 第1章 旗开得胜" were dropped from the TOC. Treat 番外篇/番外/外传 as preface-style keywords so they match alongside 楔子/前言/etc. Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>