const fs = require('fs');
const file = 'src/modules/book-generator/langgraph-generator.ts';
const lines = fs.readFileSync(file, 'utf8').split('\n');

// 修改第790行（索引789）
lines[789] = `    const thinkEndIdx = cleanedStr.indexOf(String.fromCharCode(60) + 'think end' + String.fromCharCode(62));`;

fs.writeFileSync(file, lines.join('\n'), 'utf8');
console.log('✅ 第790行已修复');
console.log('新内容:', lines[789]);