fix: Txt file chapter title detection(Anxcye#107)

Author: Anxcye

CHANGELOG.md

@@ -10,11 +10,13 @@
 - Feat: Expand the range of custom font size
 - Feat: Add volume key page turn switch
 - Feat: Add custom Gemini api url
-- 
+- Fix: Android TTS slider value not updating
+- Fix: Txt file chapter title detection(#107)
 - 新增：扩大自定义字体大小范围
 - 新增：音量键翻页开关
 - 新增：自定义 Gemini api url
 - 修复：Android TTS 滑块数值不更新
+- 修复：txt 文件章节标题检测(#107)
 
 ## 1.2.6
 - Fix: Fix ai stream error

lib/service/convert_to_epub/txt/convert_from_txt.dart

@@ -64,8 +64,9 @@ Future<File> convertFromTxt(File file) async {
   AnxLog.info('convert from txt. content: ${content.length}');
 
   final patternStr = RegExp(
-    r'^(.* +|　*)?([第][一二三四五六七八九十零〇百千万两0123456789]+[章卷]|[卷][一二三四五六七八九十零〇百千万两0123456789]+|[Cc]hap(?:ter)\.?|[Vv]ol(?:ume)?\.?|[Bb]ook|[Bb]k)( +.*)?$',
+    r'^(?:(.+ +)|())(第[一二三四五六七八九十零〇百千万两0123456789]+[章卷]|卷[一二三四五六七八九十零〇百千万两0123456789]+|chap(?:ter)\.?|vol(?:ume)?\.?|book|bk)(?:(?: +.+)?|(?:\S.*)?)$',
     multiLine: true,
+    caseSensitive: false,
   );
 
   final matches = patternStr.allMatches(content).toList();