v0.1.2

Changes

• Fix chapter boundary detection for MinerU aside_text running headers.
• Make generated chapter patterns safer by avoiding bare chapter/appendix/number labels when the configured title contains title text.
• Add broader Chinese and English boundary variants, including Chap., Lesson, Appendix/App., Roman numerals, and English number words.
• Include aside_text in the headings helper and add regression tests for boundary matching.