Initial commit

src/__init__.py

@@ -0,0 +1,32 @@
+"""
+EPUB 双语翻译程序
+主要功能模块的初始化文件
+"""
+
+__version__ = "0.08"
+__author__ = "Kaitan"
+
+from .epub_parser import EPUBParser
+from .translator import EPUBTranslator
+from .llm_client import LLMClient as OpenRouterClient # Keep alias for compatibility
+from .llm_client import LLMClient
+from .text_processor import TextProcessor
+from .bilingual_builder import BilingualEPUBBuilder
+from .chinese_builder import ChineseEPUBBuilder
+from .format_extractor import FormatExtractor
+from .format_restorer import FormatRestorer
+from .utils import load_config, setup_logging
+
+__all__ = [
+    "EPUBParser",
+    "EPUBTranslator", 
+    "LLMClient",
+    "OpenRouterClient",
+    "TextProcessor",
+    "BilingualEPUBBuilder",
+    "ChineseEPUBBuilder",
+    "FormatExtractor",
+    "FormatRestorer",
+    "load_config",
+    "setup_logging"
+]

src/bilingual_builder.py

@@ -0,0 +1,180 @@
+"""
+双语 EPUB 构建器模块 - 安全的EPUB构建 (Manifest 兼容版)
+"""
+
+from ebooklib import epub
+import ebooklib
+from bs4 import BeautifulSoup
+from typing import Dict, List
+from pathlib import Path
+from loguru import logger
+import uuid
+
+
+class BilingualEPUBBuilder:
+    """双语 EPUB 构建器"""
+    
+    def __init__(self, original_book, config: Dict):
+        self.original_book = original_book
+        self.config = config
+        self.output_config = config['output']
+    
+    def create_bilingual_epub_with_mapping(self, translation_map: Dict[str, str],
+                                          paragraph_map: Dict[str, Dict],
+                                          output_path: str) -> str:
+        """
+        创建双语 EPUB。使用 ordered_ids 确保与 Manifest 严格一致。
+        """
+        try:
+            new_book = epub.EpubBook()
+            self._copy_metadata(new_book)
+            new_book.toc = self._sanitize_toc(self.original_book.toc)
+            
+            # 准备每个文件的有序ID列表
+            file_ordered_ids = {}
+            sorted_pids = sorted(paragraph_map.keys(), key=lambda x: int(x.split('_')[1]))
+            for pid in sorted_pids:
+                info = paragraph_map[pid]
+                fname = info['file_name']
+                if fname not in file_ordered_ids:
+                    file_ordered_ids[fname] = []
+                file_ordered_ids[fname].append(pid)
+            
+            processed_item_ids = set()
+            item_map = {}
+
+            # 特殊处理：封面图片
+            cover_id_meta = self.original_book.get_metadata('OPF', 'cover')
+            if cover_id_meta:
+                cover_item = self.original_book.get_item_with_id(cover_id_meta[0][0])
+                if cover_item:
+                    new_book.add_item(cover_item)
+                    processed_item_ids.add(cover_item.id)
+                    item_map[cover_item.id] = cover_item
+
+            # 复制资源
+            for item in self.original_book.get_items():
+                if item.get_type() != ebooklib.ITEM_DOCUMENT:
+                    if item.id not in processed_item_ids:
+                        new_book.add_item(item)
+                        processed_item_ids.add(item.id)
+                        item_map[item.id] = item
+
+            # 重建 Spine
+            new_spine = []
+            for spine_id, linear in self.original_book.spine:
+                item = self.original_book.get_item_with_id(spine_id)
+                if not item: continue
+                
+                if item.get_type() == ebooklib.ITEM_DOCUMENT:
+                    file_name = item.get_name()
+                    if file_name in file_ordered_ids:
+                        new_item = self._create_bilingual_document(
+                            item, file_ordered_ids[file_name], translation_map
+                        )
+                        new_item.id = item.id 
+                    else:
+                        new_item = item
+                    
+                    if new_item.id not in processed_item_ids:
+                        new_book.add_item(new_item)
+                        processed_item_ids.add(new_item.id)
+                    new_spine.append(new_item)
+                else:
+                    if item.id in item_map:
+                        new_spine.append(item_map[item.id])
+            
+            new_book.spine = new_spine
+            new_book.add_item(epub.EpubNcx())
+            new_book.add_item(epub.EpubNav())
+            
+            output_file = self._generate_output_filename(output_path)
+            epub.write_epub(output_file, new_book, {})
+            return output_file
+            
+        except Exception as e:
+            logger.error(f"创建双语 EPUB 失败: {e}", exc_info=True)
+            raise
+
+    def _sanitize_toc(self, toc):
+        """确保 TOC 中的所有节点都有 ID，修复 ebooklib 读取后写入的兼容性问题"""
+        for item in toc:
+            if isinstance(item, (epub.Link, epub.Section)):
+                if not getattr(item, 'uid', None):
+                    item.uid = f"navPoint-{uuid.uuid4().hex[:8]}"
+            elif isinstance(item, tuple) and len(item) == 2:
+                # 处理 (Section, [children]) 结构
+                section, children = item
+                if isinstance(section, (epub.Link, epub.Section)):
+                    if not getattr(section, 'uid', None):
+                        section.uid = f"navPoint-{uuid.uuid4().hex[:8]}"
+                self._sanitize_toc(children)
+        return toc
+
+    def _copy_metadata(self, new_book):
+        try:
+            for namespace, meta_dict in self.original_book.metadata.items():
+                for name, values in meta_dict.items():
+                    for value, other in values:
+                        if name and hasattr(name, 'lower') and name.lower() == 'identifier': continue
+                        new_book.add_metadata(namespace, name, value, other)
+            new_book.add_metadata('DC', 'language', 'zh-CN')
+            new_book.set_identifier(f"bilingual-{uuid.uuid4().hex[:12]}")
+            
+            cover_id_meta = self.original_book.get_metadata('OPF', 'cover')
+            if cover_id_meta:
+                cover_item = self.original_book.get_item_with_id(cover_id_meta[0][0])
+                if cover_item:
+                    new_book.add_item(cover_item)
+                    new_book.set_cover(cover_item.get_name(), cover_item.get_content())
+        except Exception as e:
+            logger.error(f"元数据复制出错: {e}")
+
+    def _create_bilingual_document(self, original_item, ordered_ids: list, translation_map: dict):
+        try:
+            from .text_processor import TextProcessor
+            soup = BeautifulSoup(original_item.get_content().decode('utf-8'), 'html.parser')
+            self._add_style_link(soup)
+            
+            # 使用与 TextProcessor 相同的过滤逻辑获取元素
+            text_elements = TextProcessor.get_valid_text_elements(soup)
+            
+            current_para_index = 0
+            for element in text_elements:
+                if TextProcessor.is_navigation_element(element): continue
+                if not TextProcessor.clean_element_text(element): continue
+                
+                if current_para_index < len(ordered_ids):
+                    target_id = ordered_ids[current_para_index]
+                    translation = translation_map.get(target_id)
+                    if translation:
+                        self._insert_translation(element, translation, soup)
+                    current_para_index += 1
+            
+            new_item = epub.EpubHtml(title=original_item.title, file_name=original_item.get_name(), lang='zh-CN')
+            new_item.set_content(str(soup).encode('utf-8'))
+            return new_item
+        except Exception as e:
+            logger.error(f"创建双语文档失败 {original_item.get_name()}: {e}")
+            return original_item
+
+    def _add_style_link(self, soup):
+        head = soup.find('head')
+        if head and not head.find('link', href='style/bilingual.css'):
+            head.append(soup.new_tag('link', rel='stylesheet', type='text/css', href='style/bilingual.css'))
+
+    def _insert_translation(self, element, translation: str, soup):
+        try:
+            translation_p = soup.new_tag('p')
+            translation_p.string = translation
+            translation_p['class'] = ['translation-text', 'chinese']
+            element.insert_after(translation_p)
+        except Exception as e:
+            logger.warning(f"插入翻译失败: {e}")
+
+    def _generate_output_filename(self, output_path: str) -> str:
+        from .utils import sanitize_filename
+        title = self.original_book.get_metadata('DC', 'title')
+        clean_title = sanitize_filename(title[0][0]) if title else "bilingual_book"
+        Path(output_path).mkdir(parents=True, exist_ok=True)
+        return str(Path(output_path) / f"{clean_title}_bilingual.epub")

src/book_profiler.py

@@ -0,0 +1,84 @@
+
+'''Book Profiler Module
+
+Features:
+1. Automatically extract book samples to generate Book Profile (Genre, Style, Glossary).
+'''
+
+import json
+import random
+from pathlib import Path
+from typing import Dict, List
+from loguru import logger
+from .manifest_manager import ManifestManager
+from .llm_client import LLMClient
+
+class BookProfiler:
+    def __init__(self, config: Dict, llm_client: LLMClient):
+        self.config = config
+        self.llm_client = llm_client
+
+    def extract_sample_text(self, manifest: ManifestManager, char_limit: int = 3000) -> str:
+        """Extract sample text."""
+        items = manifest.get_items()
+        if not items: return ""
+        
+        intro_text = []
+        for item in items[:50]:
+            if len(item.clean_text) > 50:
+                intro_text.append(item.clean_text)
+        
+        body_text = []
+        body_items = [i for i in items[50:] if len(i.clean_text) > 80]
+        if body_items:
+            samples = random.sample(body_items, min(5, len(body_items)))
+            body_text = [i.clean_text for i in samples]
+            
+        full_text = "\n\n".join(intro_text[:5] + body_text)
+        return full_text[:char_limit]
+
+    async def analyze_book(self, manifest: ManifestManager) -> Dict:
+        """Generate Book Profile."""
+        existing_profile = manifest.data.get('metadata', {}).get('profile')
+        if existing_profile:
+            logger.info("Loaded existing Book Profile")
+            return existing_profile
+
+        sample = self.extract_sample_text(manifest)
+        if not sample: return {}
+        
+        logger.info("Generating Book Profile...")
+        
+        system_prompt = "You are a senior publishing editor. Analyze the text and output JSON."
+        user_prompt = f"""
+Please analyze the following book excerpt.
+Output JSON format:
+{{
+    "genre": "Genre",
+    "style": "Style description",
+    "audience": "Target Audience",
+    "glossary": {{ "Term": "Chinese Translation" }},
+    "translation_instruction": "Specific instruction for translator"
+}}
+
+Excerpt:
+{sample}
+"""
+        try:
+            response = await self.llm_client.raw_chat_completion(system_prompt, user_prompt)
+            json_str = response.strip()
+            if "```json" in json_str:
+                json_str = json_str.split("```json")[1].split("```")[0].strip()
+            elif "```" in json_str:
+                json_str = json_str.split("```")[1].split("```")[0].strip()
+            
+            profile = json.loads(json_str)
+            
+            if 'metadata' not in manifest.data:
+                manifest.data['metadata'] = {}
+            manifest.data['metadata']['profile'] = profile
+            manifest.save()
+            return profile
+        except Exception as e:
+            logger.error(f"Profile generation failed: {e}")
+            return {}

src/cache.py

@@ -0,0 +1,226 @@
+"""
+翻译缓存管理模块 - 简化版
+基于全局ID和chunk的缓存系统
+"""
+
+import json
+import hashlib
+from pathlib import Path
+from datetime import datetime, timedelta
+from typing import Dict, Optional, List
+from loguru import logger
+
+
+class TranslationCache:
+    """翻译缓存管理器 - 简化版"""
+    
+    def __init__(self, config: Dict):
+        """初始化缓存管理器"""
+        self.config = config
+        cache_config = config.get('cache', {})
+        
+        self.enabled = cache_config.get('enabled', True)
+        self.cache_dir = Path(cache_config.get('directory', 'cache'))
+        self.max_age_days = cache_config.get('max_age_days', 30)
+        
+        if self.enabled:
+            self.cache_dir.mkdir(parents=True, exist_ok=True)
+            self.translations_dir = self.cache_dir / 'translations'
+            self.translations_dir.mkdir(parents=True, exist_ok=True)
+            
+            logger.info(f"翻译缓存已启用: {self.cache_dir}")
+    
+    def get_chunk_translation(self, chunk: List[Dict], model: str) -> Optional[Dict[str, str]]:
+        """
+        获取chunk的缓存翻译
+        
+        Args:
+            chunk: 段落列表（带global_id）
+            model: 模型名称
+            
+        Returns:
+            {global_id: translation} 映射，如果不存在返回 None
+        """
+        if not self.enabled:
+            return None
+        
+        try:
+            cache_key = self._get_chunk_cache_key(chunk, model)
+            cache_file = self._get_cache_file_path(cache_key)
+            
+            if not cache_file.exists():
+                return None
+            
+            # 检查是否过期
+            file_age = datetime.now() - datetime.fromtimestamp(cache_file.stat().st_mtime)
+            if file_age > timedelta(days=self.max_age_days):
+                logger.debug(f"缓存已过期: {cache_key[:8]}...")
+                cache_file.unlink()
+                return None
+            
+            # 读取缓存
+            with open(cache_file, 'r', encoding='utf-8') as f:
+                cache_data = json.load(f)
+            
+            # 验证缓存
+            if (cache_data.get('success') and 
+                cache_data.get('model') == model and
+                self._validate_cache_data(cache_data, chunk)):
+                
+                logger.debug(f"缓存命中: {cache_key[:8]}... ({len(chunk)} 段落)")
+                return cache_data.get('translations', {})
+            
+            return None
+            
+        except Exception as e:
+            logger.warning(f"读取缓存失败: {e}")
+            return None
+    
+    def save_chunk_translation(self, chunk: List[Dict], translations: Dict[str, str], 
+                              model: str, success: bool = True) -> None:
+        """
+        保存chunk翻译到缓存
+        
+        Args:
+            chunk: 段落列表（带global_id）
+            translations: {global_id: translation} 映射
+            model: 模型名称
+            success: 是否翻译成功
+        """
+        if not self.enabled:
+            return
+        
+        try:
+            cache_key = self._get_chunk_cache_key(chunk, model)
+            cache_file = self._get_cache_file_path(cache_key)
+            
+            # 构建缓存数据
+            cache_data = {
+                'global_ids': [p['global_id'] for p in chunk],
+                'translations': translations,
+                'model': model,
+                'timestamp': datetime.now().isoformat(),
+                'success': success,
+                'paragraph_count': len(chunk),
+                'cache_version': '3.0'
+            }
+            
+            with open(cache_file, 'w', encoding='utf-8') as f:
+                json.dump(cache_data, f, ensure_ascii=False, indent=2)
+            
+            logger.debug(f"缓存已保存: {cache_key[:8]}... ({len(chunk)} 段落)")
+            
+        except Exception as e:
+            logger.warning(f"保存缓存失败: {e}")
+    
+    def _get_chunk_cache_key(self, chunk: List[Dict], model: str) -> str:
+        """
+        生成chunk缓存键（基于全局ID序列）
+        
+        Args:
+            chunk: 段落列表
+            model: 模型名称
+            
+        Returns:
+            缓存键
+        """
+        # 使用全局ID序列作为缓存键的一部分
+        id_sequence = ",".join(p['global_id'] for p in chunk)
+        combined = f"{id_sequence}|{model}"
+        return hashlib.md5(combined.encode('utf-8')).hexdigest()
+    
+    def _get_cache_file_path(self, cache_key: str) -> Path:
+        """获取缓存文件路径"""
+        # 使用 hash 前缀分目录，避免单目录文件过多
+        subdir = cache_key[:2]
+        cache_subdir = self.translations_dir / subdir
+        cache_subdir.mkdir(parents=True, exist_ok=True)
+        return cache_subdir / f"{cache_key}.json"
+    
+    def _validate_cache_data(self, cache_data: Dict, chunk: List[Dict]) -> bool:
+        """验证缓存数据的有效性"""
+        # 检查ID序列是否匹配
+        cached_ids = cache_data.get('global_ids', [])
+        chunk_ids = [p['global_id'] for p in chunk]
+        
+        if cached_ids != chunk_ids:
+            logger.debug("缓存ID序列不匹配")
+            return False
+        
+        # 只要有翻译结果就认为有效，不要求数量完全匹配
+        translations = cache_data.get('translations', {})
+        if not translations:
+            logger.debug("缓存无翻译结果")
+            return False
+        
+        return True
+    
+    def clear_cache(self, older_than_days: Optional[int] = None) -> int:
+        """清理缓存"""
+        if not self.enabled or not self.translations_dir.exists():
+            return 0
+        
+        cleared_count = 0
+        cutoff_time = None
+        
+        if older_than_days is not None:
+            cutoff_time = datetime.now() - timedelta(days=older_than_days)
+        
+        try:
+            for cache_file in self.translations_dir.rglob('*.json'):
+                should_delete = False
+                
+                if cutoff_time is None:
+                    should_delete = True
+                else:
+                    file_time = datetime.fromtimestamp(cache_file.stat().st_mtime)
+                    should_delete = file_time < cutoff_time
+                
+                if should_delete:
+                    cache_file.unlink()
+                    cleared_count += 1
+            
+            # 清理空目录
+            for date_dir in self.translations_dir.iterdir():
+                if date_dir.is_dir() and not any(date_dir.iterdir()):
+                    date_dir.rmdir()
+            
+            logger.info(f"清理了 {cleared_count} 个缓存文件")
+            return cleared_count
+            
+        except Exception as e:
+            logger.error(f"清理缓存失败: {e}")
+            return 0
+    
+    def get_cache_stats(self) -> Dict:
+        """获取缓存统计信息"""
+        if not self.enabled or not self.translations_dir.exists():
+            return {'enabled': False}
+        
+        try:
+            cache_files = list(self.translations_dir.rglob('*.json'))
+            total_files = len(cache_files)
+            total_size = sum(f.stat().st_size for f in cache_files)
+            
+            # 统计段落数
+            total_paragraphs = 0
+            for cache_file in cache_files:
+                try:
+                    with open(cache_file, 'r', encoding='utf-8') as f:
+                        data = json.load(f)
+                        total_paragraphs += data.get('paragraph_count', 0)
+                except:
+                    continue
+            
+            return {
+                'enabled': True,
+                'total_files': total_files,
+                'total_paragraphs': total_paragraphs,
+                'total_size_mb': round(total_size / 1024 / 1024, 2),
+                'cache_directory': str(self.cache_dir),
+                'max_age_days': self.max_age_days
+            }
+            
+        except Exception as e:
+            logger.error(f"获取缓存统计失败: {e}")
+            return {'enabled': True, 'error': str(e)}

src/chinese_builder.py

@@ -0,0 +1,230 @@
+"""
+纯中文 EPUB 构建器模块
+
+负责：
+1. 复制原始 EPUB 结构
+2. 使用译文替换原文
+3. 调用 FormatRestorer 将译文占位符还原为 HTML 标签
+"""
+
+from ebooklib import epub
+import ebooklib
+from bs4 import BeautifulSoup
+from typing import Dict, List
+from pathlib import Path
+from loguru import logger
+import uuid
+
+class ChineseEPUBBuilder:
+    """纯中文 EPUB 构建器"""
+    
+    def __init__(self, original_book, config: Dict):
+        self.original_book = original_book
+        self.config = config
+        self.output_config = config['output']
+    
+    def create_chinese_epub_with_mapping(self, 
+                                        items: List, # List[ManifestItem]
+                                        output_path: str) -> str:
+        """
+        创建纯中文 EPUB。
+        """
+        try:
+            new_book = epub.EpubBook()
+            self._copy_metadata(new_book)
+            new_book.toc = self._sanitize_toc(self.original_book.toc)
+            
+            # 准备每个文件的有序项目列表
+            file_items = {}
+            for item in sorted(items, key=lambda x: x.global_id):
+                fname = item.source_file
+                if fname not in file_items:
+                    file_items[fname] = []
+                file_items[fname].append(item)
+            
+            processed_item_ids = set()
+            item_map = {}
+
+            # 特殊处理：封面图片
+            cover_id_meta = self.original_book.get_metadata('OPF', 'cover')
+            if cover_id_meta:
+                cover_item = self.original_book.get_item_with_id(cover_id_meta[0][0])
+                if cover_item:
+                    new_book.add_item(cover_item)
+                    processed_item_ids.add(cover_item.id)
+                    item_map[cover_item.id] = cover_item
+
+            # 复制资源
+            for item in self.original_book.get_items():
+                if item.get_type() != ebooklib.ITEM_DOCUMENT:
+                    if item.id not in processed_item_ids:
+                        new_book.add_item(item)
+                        processed_item_ids.add(item.id)
+                        item_map[item.id] = item
+
+            # 重建 Spine
+            new_spine = []
+            for spine_id, linear in self.original_book.spine:
+                item = self.original_book.get_item_with_id(spine_id)
+                if not item: continue
+                
+                if item.get_type() == ebooklib.ITEM_DOCUMENT:
+                    file_name = item.get_name()
+                    if file_name in file_items:
+                        new_item = self._create_chinese_document(
+                            item, file_items[file_name]
+                        )
+                        new_item.id = item.id 
+                    else:
+                        new_item = item
+                    
+                    if new_item.id not in processed_item_ids:
+                        new_book.add_item(new_item)
+                        processed_item_ids.add(new_item.id)
+                    new_spine.append(new_item)
+                else:
+                    if item.id in item_map:
+                        new_spine.append(item_map[item.id])
+            
+            new_book.spine = new_spine
+            new_book.add_item(epub.EpubNcx())
+            new_book.add_item(epub.EpubNav())
+            
+            output_file = self._generate_output_filename(output_path)
+            epub.write_epub(output_file, new_book, {})
+            return output_file
+            
+        except Exception as e:
+            logger.error(f"创建纯中文 EPUB 失败: {e}", exc_info=True)
+            raise
+
+    def _sanitize_toc(self, toc):
+        """确保 TOC 中的所有节点都有 ID"""
+        for item in toc:
+            if isinstance(item, (epub.Link, epub.Section)):
+                if not getattr(item, 'uid', None):
+                    item.uid = f"navPoint-{uuid.uuid4().hex[:8]}"
+            elif isinstance(item, tuple) and len(item) == 2:
+                section, children = item
+                if isinstance(section, (epub.Link, epub.Section)):
+                    if not getattr(section, 'uid', None):
+                        section.uid = f"navPoint-{uuid.uuid4().hex[:8]}"
+                self._sanitize_toc(children)
+        return toc
+
+    def _copy_metadata(self, new_book):
+        try:
+            for namespace, meta_dict in self.original_book.metadata.items():
+                for name, values in meta_dict.items():
+                    for value, other in values:
+                        if name and hasattr(name, 'lower') and name.lower() == 'identifier': continue
+                        new_book.add_metadata(namespace, name, value, other)
+            new_book.add_metadata('DC', 'language', 'zh-CN')
+            new_book.set_identifier(f"chinese-{uuid.uuid4().hex[:12]}")
+        except Exception as e:
+            logger.error(f"元数据复制出错: {e}")
+
+    def _create_chinese_document(self, original_item, manifest_items: list):
+        try:
+            from .text_processor import TextProcessor
+            soup = BeautifulSoup(original_item.get_content().decode('utf-8'), 'html.parser')
+            
+            # 获取文本元素
+            text_elements = TextProcessor.get_valid_text_elements(soup)
+            
+            current_idx = 0
+            for element in text_elements:
+                if not TextProcessor.clean_element_text(element): continue
+                
+                if current_idx < len(manifest_items):
+                    m_item = manifest_items[current_idx]
+                    
+                    # 只有当非导航元素时才尝试替换内容
+                    if not TextProcessor.is_navigation_element(element):
+                        # 检查是否是嵌套容器（需要特殊处理）
+                        is_nested = TextProcessor.is_nested_container(element)
+                        
+                        # 优先使用带格式的翻译，降级到纯文本翻译
+                        if m_item.translation_with_original_html:
+                            if is_nested:
+                                self._replace_direct_content(element, m_item.translation_with_original_html)
+                            else:
+                                self._replace_content(element, m_item.translation_with_original_html)
+                        elif m_item.translation:
+                            # 降级：使用纯文本翻译（无格式）
+                            if is_nested:
+                                self._replace_direct_content(element, m_item.translation)
+                            else:
+                                self._replace_content(element, m_item.translation)
+                    
+                    current_idx += 1
+
+            
+            new_item = epub.EpubHtml(title=original_item.title, file_name=original_item.get_name(), lang='zh-CN')
+            new_item.set_content(str(soup).encode('utf-8'))
+            return new_item
+        except Exception as e:
+            logger.error(f"创建中文文档失败 {original_item.get_name()}: {e}")
+            return original_item
+
+    def _replace_content(self, element, translated_html: str):
+        """用译文替换元素的 inner_html"""
+        try:
+            # 将译文 HTML 字符串解析为 BeautifulSoup 对象
+            new_soup = BeautifulSoup(translated_html, 'html.parser')
+            # 清空原元素并填入新内容
+            element.clear()
+            # 重要：必须先转换为 list，否则 append 会修改 contents 导致跳过元素
+            for content in list(new_soup.contents):
+                element.append(content)
+        except Exception as e:
+            logger.error(f"替换内容失败: {e}")
+
+    def _replace_direct_content(self, element, translated_html: str):
+        """
+        替换嵌套容器元素的直接文本内容（保留子块级元素）
+        
+        策略：
+        1. 保存所有子块级元素
+        2. 清空元素内容
+        3. 填入译文
+        4. 在末尾追加保存的子块
+        """
+        try:
+            from bs4 import NavigableString
+            block_tags = ['p', 'div', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'blockquote', 'li', 'td']
+            
+            # 1. 保存所有子块级元素
+            saved_blocks = []
+            for child in element.find_all(block_tags, recursive=False):
+                # 只保存直接子元素中的块
+                saved_blocks.append(child.extract())
+            
+            # 2. 额外保存嵌套在 span 等内联元素中的块
+            for inline in element.find_all(['span', 'a', 'em', 'strong'], recursive=True):
+                for child in inline.find_all(block_tags, recursive=False):
+                    saved_blocks.append(child.extract())
+            
+            # 3. 清空并填入译文
+            new_soup = BeautifulSoup(translated_html, 'html.parser')
+            element.clear()
+            for content in list(new_soup.contents):
+                element.append(content)
+            
+            # 4. 追加保存的子块
+            for block in saved_blocks:
+                element.append(block)
+                
+        except Exception as e:
+            logger.error(f"替换嵌套内容失败: {e}")
+            # 降级到普通替换
+            self._replace_content(element, translated_html)
+
+
+
+    def _generate_output_filename(self, output_path: str) -> str:
+        from .utils import sanitize_filename
+        title = self.original_book.get_metadata('DC', 'title')
+        clean_title = sanitize_filename(title[0][0]) if title else "chinese_book"
+        Path(output_path).mkdir(parents=True, exist_ok=True)
+        return str(Path(output_path) / f"{clean_title}_chinese.epub")

src/epub_parser.py

@@ -0,0 +1,175 @@
+"""
+EPUB 解析器模块 (EPUB Parser Module)
+
+该模块负责读取 EPUB 文件，提取元数据和内容项目。
+它使用 ebooklib 库来处理 EPUB 格式的底层细节。
+
+Classes:
+    EPUBParser: 负责 EPUB 文件的加载、元数据提取和内容项遍历。
+"""
+
+import ebooklib
+from ebooklib import epub
+from bs4 import BeautifulSoup
+from typing import List, Dict, Any, Set, Optional
+from pathlib import Path
+from loguru import logger
+
+
+class EPUBParser:
+    """
+    EPUB 文件解析器。
+
+    负责加载 EPUB 文件，提取书籍元数据（如标题、作者），并提供方法来遍历和提取
+    书中的文档内容（HTML/XHTML）。
+
+    Attributes:
+        epub_path (Path): EPUB 文件的路径对象。
+        book (epub.EpubBook): ebooklib 加载的书籍对象。
+        metadata (Dict[str, str]): 提取的书籍元数据字典。
+    """
+    
+    def __init__(self, epub_path: str):
+        """
+        初始化 EPUB 解析器。
+
+        Args:
+            epub_path (str): EPUB 文件的文件路径。
+
+        Raises:
+            FileNotFoundError: 如果指定的文件不存在。
+            Exception: 如果 EPUB 文件加载失败（格式错误等）。
+        """
+        self.epub_path = Path(epub_path)
+        if not self.epub_path.exists():
+            raise FileNotFoundError(f"EPUB 文件不存在: {epub_path}")
+        
+        try:
+            # ignore_ncx=True 是为了避免某些旧版 epub 的警告，但新版 ebooklib 可能行为不同
+            # 这里直接读取，让 ebooklib 处理
+            self.book = epub.read_epub(str(self.epub_path))
+            logger.info(f"成功加载 EPUB: {self.epub_path.name}")
+        except Exception as e:
+            logger.error(f"加载 EPUB 失败: {e}")
+            raise
+        
+        self.metadata = self._extract_metadata()
+    
+    def _extract_metadata(self) -> Dict[str, str]:
+        """
+        从 EPUB 对象中提取标准元数据。
+
+        提取 Dublin Core (DC) 元数据，包括标题、作者和语言。
+
+        Returns:
+            Dict[str, str]: 包含 'title', 'author', 'language' 的字典。
+                            如果提取失败，会使用默认值 ("Unknown", "en")。
+        """
+        metadata = {}
+        
+        try:
+            # get_metadata 返回的是 (value, dict) 的列表，我们取第一个结果
+            title_meta = self.book.get_metadata('DC', 'title')
+            metadata['title'] = title_meta[0][0] if title_meta else "Unknown"
+            
+            author_meta = self.book.get_metadata('DC', 'creator')
+            metadata['author'] = author_meta[0][0] if author_meta else "Unknown"
+            
+            lang_meta = self.book.get_metadata('DC', 'language')
+            metadata['language'] = lang_meta[0][0] if lang_meta else "en"
+            
+            logger.info(f"书籍: {metadata['title']} - {metadata['author']}")
+        except Exception as e:
+            logger.warning(f"提取元数据时出错: {e}")
+            # 设置保底值
+            metadata.setdefault('title', 'Unknown')
+            metadata.setdefault('author', 'Unknown')
+            metadata.setdefault('language', 'en')
+        
+        return metadata
+    
+    def get_toc(self):
+        """
+        获取书籍的目录结构 (Table of Contents)
+        
+        Returns:
+            book.toc: ebooklib 的原始 TOC 结构
+        """
+        return self.book.toc
+    
+    def extract_all_content_items(self, include_files: Optional[Set[str]] = None) -> List[Dict[str, Any]]:
+        """
+        提取所有可翻译的内容项目（文档）。
+
+        遍历 EPUB 中的所有 Item，筛选出类型为 ITEM_DOCUMENT 的项目。
+        同时会进行简单的过滤，跳过内容过短（<100字符）或看起来像非正文的文件（如 nav, toc, cover）。
+
+        Returns:
+            List[Dict[str, Any]]: 内容项目列表。每个字典包含：
+                - item (epub.EpubItem): 原始 Item 对象。
+                - file_name (str): 文件名。
+                - content (str): 解码后的 HTML 内容。
+                - text_length (int): 纯文本长度（用于统计）。
+        """
+        content_items = []
+        
+        # 获取所有文档类型的项目
+        for item in self.book.get_items():
+            if item.get_type() == ebooklib.ITEM_DOCUMENT:
+                # 如果指定了 include_files，则只处理其中的文件
+                if include_files is not None:
+                    item_name = item.get_name()
+                    if item_name not in include_files:
+                        logger.debug(f"跳过未选中的文件: {item_name}")
+                        continue
+                
+                try:
+                    # 获取内容 (bytes -> str)
+                    content = item.get_content().decode('utf-8')
+                    
+                    # 简单的内容验证：提取纯文本检查长度
+                    soup = BeautifulSoup(content, 'html.parser')
+                    text = soup.get_text().strip()
+                    
+                    # 跳过太短的内容（可能是只有图片的页面、空页面）
+                    if len(text) < 100:
+                        logger.debug(f"跳过短内容: {item.get_name()} ({len(text)} 字符)")
+                        continue
+                    
+                    # 注意：文件名跳过逻辑已移至 TOCParser.get_skip_files()
+                    # 通过 include_files 参数在调用前过滤
+                    
+                    content_items.append({
+                        'item': item,
+                        'file_name': item.get_name(),
+                        'content': content,
+                        'text_length': len(text)
+                    })
+                    
+                    logger.debug(f"添加内容项: {item.get_name()} ({len(text)} 字符)")
+                    
+                except Exception as e:
+                    logger.warning(f"处理项目失败 {item.get_name()}: {e}")
+                    continue
+        
+        logger.info(f"提取了 {len(content_items)} 个内容项目")
+        return content_items
+    
+    def get_book_info(self) -> Dict[str, str]:
+        """
+        获取书籍的摘要信息。
+
+        Returns:
+            Dict[str, str]: 包含文件名、标题、作者、语言和文档数量的字典。
+        """
+        # 统计内容项
+        document_count = sum(1 for item in self.book.get_items() 
+                           if item.get_type() == ebooklib.ITEM_DOCUMENT)
+        
+        return {
+            'filename': self.epub_path.name,
+            'title': self.metadata.get('title', 'Unknown'),
+            'author': self.metadata.get('author', 'Unknown'),
+            'language': self.metadata.get('language', 'en'),
+            'document_count': document_count
+        }

src/format_extractor.py

@@ -0,0 +1,466 @@
+"""
+格式提取模块 (优化版 v3)
+
+核心优化：
+1. 前缀/后缀标签分离：文本前后的标签不发送给 LLM，直接回填
+2. 公式检测：将数学变量/公式作为整体占位符
+3. 简化占位符：φ1φ 格式，每个段落独立编号
+"""
+
+import re
+from bs4 import BeautifulSoup, Tag, NavigableString
+from typing import Tuple, Dict, Any, List, Optional
+
+
+class HeadingDetector:
+    """标题与段落类型检测器"""
+    
+    CHAPTER_PATTERNS = [
+        r'^(chapter|chap\.?|part)\s+([0-9]+|[ivxlc]+|[a-z])',
+        r'^(第\s*[0-9一二三四五六七八九十百]+\s*[章节部篇])',
+        r'^(\d+|[IVXLC]+|[A-Z])\.$'
+    ]
+    
+    EPIGRAPH_CLASSES = {
+        'epigraph', 'quote', 'blockquote', 'motto', 
+        'dedication', 'verse', 'poetry', 'poem'
+    }
+
+    def detect(self, element: Tag, text: str) -> str:
+        if self._is_epigraph(element):
+            return "epigraph"
+        tag_name = element.name.lower()
+        if tag_name in ['h1', 'h2']:
+            return "chapter" if self._matches_chapter_pattern(text) else "section"
+        if tag_name == 'h3':
+            return "section"
+        if tag_name in ['h4', 'h5', 'h6']:
+            return "subsection"
+        if self._is_pseudo_heading(element, text):
+            return "subsection"
+        return "body"
+
+    def _is_epigraph(self, element: Tag) -> bool:
+        if element.name == 'blockquote':
+            return True
+        current = element
+        for _ in range(3):
+            if not current: break
+            classes = current.get('class', [])
+            if isinstance(classes, list):
+                classes = ' '.join(classes)
+            if any(k in classes.lower() for k in self.EPIGRAPH_CLASSES):
+                return True
+            current = current.parent
+        return False
+
+    def _matches_chapter_pattern(self, text: str) -> bool:
+        text = text.strip().lower()
+        for pattern in self.CHAPTER_PATTERNS:
+            if re.match(pattern, text, re.IGNORECASE):
+                return True
+        return False
+
+    def _is_pseudo_heading(self, element: Tag, text: str) -> bool:
+        if element.name != 'p':
+            return False
+        text = text.strip()
+        if not text or len(text) > 80:
+            return False
+        children = list(element.children)
+        if len(children) == 1 and isinstance(children[0], Tag):
+            if children[0].name in ['strong', 'b']:
+                return True
+        return False
+
+
+class FormatExtractor:
+    """
+    HTML 格式提取器 (优化版 v3)
+    
+    核心改进：
+    1. 前缀/后缀标签分离 - 不发送给 LLM，自动回填
+    2. 公式元素整体替换
+    3. 简化占位符格式 φ1φ, φ2φ
+    """
+
+    FORMULA_CHARS = re.compile(
+        r'^[\d\s\+\-\×\÷\=\(\)\[\]\{\}\<\>\^\*\/\.\,\;\:\'\"\`\~\@\#\$\%\&\|\\'
+        r'αβγδεζηθικλμνξοπρστυφχψωΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥΦΧΨΩ'
+        r'a-zA-Z]+$'
+    )
+
+    def __init__(self):
+        self.detector = HeadingDetector()
+
+    def extract(self, element_html: str) -> Tuple[str, str, Dict[str, str], str]:
+        """
+        提取格式信息
+        
+        Returns:
+            clean_text: 纯文本
+            text_with_placeholders: 只包含内嵌占位符的文本（不含前缀/后缀标签）
+            placeholder_map: 占位符映射，包含特殊键 "_prefix" 和 "_suffix"
+            paragraph_type: 段落类型
+        """
+        soup = BeautifulSoup(element_html, 'html.parser')
+        root = list(soup.children)[0] if list(soup.children) else soup
+        
+        # 获取纯文本和段落类型
+        clean_text = root.get_text().strip()
+        clean_text = re.sub(r'\s+', ' ', clean_text)
+        p_type = self.detector.detect(root, clean_text) if isinstance(root, Tag) else "body"
+        
+        # 获取内部 HTML
+        inner_html = root.decode_contents() if isinstance(root, Tag) else str(root)
+        
+        # 智能提取（分离前缀/后缀）
+        text_with_ph, local_map = self._smart_extract_v3(inner_html)
+        
+        # === 验证完整性 ===
+        # 将 text_with_placeholders 去掉占位符后与 clean_text 比较
+        stripped_text = self._strip_placeholders(text_with_ph)
+        stripped_text = re.sub(r'\s+', ' ', stripped_text).strip()
+        
+        if not self._verify_content_integrity(clean_text, stripped_text):
+            # 内容不完整，降级到简单模式
+            from loguru import logger
+            logger.warning(f"内容验证失败，降级处理: '{clean_text[:30]}...'")
+            # 降级：不使用前缀/后缀分离，只做简单占位符处理
+            text_with_ph, local_map = self._fallback_extract(inner_html, clean_text)
+        
+        return clean_text, text_with_ph, local_map, p_type
+    
+    def _strip_placeholders(self, text: str) -> str:
+        """移除所有占位符（φXφ 和 φ/Xφ 格式）"""
+        return re.sub(r'φ/?[0-9]+φ', '', text)
+    
+    def _verify_content_integrity(self, clean_text: str, stripped_text: str) -> bool:
+        """
+        验证内容完整性：比较 clean_text 和 stripped_text
+        
+        允许一定的容差（空格差异、标点差异）
+        """
+        # 标准化：移除空格和常见标点进行比较
+        def normalize(s):
+            s = re.sub(r'\s+', '', s)  # 移除空格
+            s = s.lower()  # 忽略大小写
+            return s
+        
+        norm_clean = normalize(clean_text)
+        norm_stripped = normalize(stripped_text)
+        
+        # 完全匹配
+        if norm_clean == norm_stripped:
+            return True
+        
+        # 检查是否只是缺少少量字符（<5%）
+        if len(norm_stripped) > 0:
+            coverage = len(norm_stripped) / len(norm_clean) if norm_clean else 0
+            if coverage >= 0.95:
+                return True
+        
+        return False
+    
+    def _fallback_extract(self, inner_html: str, clean_text: str) -> Tuple[str, Dict[str, str]]:
+        """
+        降级提取：不分离前缀/后缀，直接返回纯文本
+        """
+        return clean_text, {"_prefix": "", "_suffix": ""}
+
+    def _smart_extract_v3(self, inner_html: str) -> Tuple[str, Dict[str, str]]:
+        """
+        智能提取 v3：分离前缀/后缀 + 合并内嵌公式块
+        
+        核心逻辑：
+        1. 分离前缀（第一个可翻译文本之前）和后缀（最后一个可翻译文本之后）
+        2. 中间部分：检测"公式块"（连续标签+不可翻译文本），合并为单个占位符
+        3. 只有真正需要翻译的格式标签（如斜体包裹的长文本）才拆分
+        """
+        # 使用正则分割标签和文本
+        parts = re.split(r'(<[^>]+>)', inner_html)
+        parts = [p for p in parts if p]
+        
+        if not parts:
+            return "", {"_prefix": "", "_suffix": ""}
+        
+        # 识别每个部分的类型
+        part_types = []  # 'tag', 'translatable', 'formula', 'whitespace'
+        for part in parts:
+            if part.startswith('<'):
+                part_types.append('tag')
+            elif not part.strip():
+                part_types.append('whitespace')
+            elif self._is_translatable_text(part):
+                part_types.append('translatable')
+            else:
+                part_types.append('formula')
+        
+        # 找到第一个和最后一个可翻译文本的索引
+        first_trans_idx = None
+        last_trans_idx = None
+        for i, t in enumerate(part_types):
+            if t == 'translatable':
+                if first_trans_idx is None:
+                    first_trans_idx = i
+                last_trans_idx = i
+        
+        if first_trans_idx is None:
+            # 没有可翻译文本，全部作为前缀
+            return "", {"_prefix": inner_html, "_suffix": ""}
+        
+        # 分割
+        prefix_parts = parts[:first_trans_idx]
+        middle_parts = parts[first_trans_idx:last_trans_idx + 1]
+        middle_types = part_types[first_trans_idx:last_trans_idx + 1]
+        suffix_parts = parts[last_trans_idx + 1:]
+        
+        # === Drop Cap 检测 ===
+        # 英文书籍常用首字母放大样式，如 <span class="dropcap">T</span>his
+        # 检测：前缀末尾是格式化的单个字母，且中间部分第一个文本以小写字母开头
+        # 处理：移除格式标签，将纯字母加入中间部分
+        if prefix_parts and middle_parts:
+            prefix_parts, middle_parts, middle_types = self._handle_drop_cap(
+                prefix_parts, middle_parts, middle_types
+            )
+        
+        # 构建映射
+        local_map = {}
+        
+        # 前缀
+        prefix_html = "".join(prefix_parts)
+        if prefix_html:
+            local_map["_prefix"] = prefix_html
+        
+        # 后缀
+        suffix_html = "".join(suffix_parts)
+        if suffix_html:
+            local_map["_suffix"] = suffix_html
+        
+        # 中间部分处理：使用配对占位符格式
+        # 
+        # 策略：
+        # 1. 连续的 (tag|formula|whitespace) 不包含可翻译文本 → 合并为单个占位符 φ1φ
+        # 2. 开始标签后接可翻译文本 → 配对格式 φ2φ文本φ/2φ
+        #
+        placeholder_counter = 1
+        result_parts = []
+        tag_stack = []  # 追踪开放标签 [(id, opening_tag), ...]
+        
+        i = 0
+        while i < len(middle_parts):
+            part = middle_parts[i]
+            ptype = middle_types[i]
+            
+            if ptype == 'translatable':
+                # 可翻译文本，直接保留
+                result_parts.append(part)
+                i += 1
+                
+            elif ptype == 'tag':
+                # 检查是开始标签还是结束标签
+                is_closing = part.startswith('</')
+                
+                if is_closing:
+                    # 结束标签
+                    if tag_stack:
+                        # 匹配最近的开放标签
+                        open_id, open_tag = tag_stack.pop()
+                        local_map[f"/{open_id}"] = part
+                        result_parts.append(f"φ/{open_id}φ")
+                    else:
+                        # 没有匹配的开放标签，作为单独占位符
+                        pid = str(placeholder_counter)
+                        placeholder_counter += 1
+                        local_map[pid] = part
+                        result_parts.append(f"φ{pid}φ")
+                    i += 1
+                else:
+                    # 开始标签，检查后面是否有可翻译文本
+                    has_translatable_after = False
+                    for j in range(i + 1, len(middle_parts)):
+                        if middle_types[j] == 'translatable':
+                            has_translatable_after = True
+                            break
+                        elif middle_types[j] == 'tag' and middle_parts[j].startswith('</'):
+                            # 遇到结束标签但还没遇到可翻译文本
+                            break
+                    
+                    if has_translatable_after:
+                        # 开始配对模式
+                        pid = str(placeholder_counter)
+                        placeholder_counter += 1
+                        local_map[pid] = part
+                        result_parts.append(f"φ{pid}φ")
+                        tag_stack.append((pid, part))
+                        i += 1
+                    else:
+                        # 后面没有可翻译文本，合并为公式块
+                        block_parts = []
+                        while i < len(middle_parts) and middle_types[i] != 'translatable':
+                            block_parts.append(middle_parts[i])
+                            i += 1
+                        if block_parts:
+                            block_html = "".join(block_parts)
+                            pid = str(placeholder_counter)
+                            placeholder_counter += 1
+                            local_map[pid] = block_html
+                            result_parts.append(f"φ{pid}φ")
+                            
+            elif ptype in ('formula', 'whitespace'):
+                # 公式或空白，检查是否是连续块的开始
+                block_parts = []
+                while i < len(middle_parts) and middle_types[i] in ('formula', 'whitespace'):
+                    block_parts.append(middle_parts[i])
+                    i += 1
+                if block_parts:
+                    block_html = "".join(block_parts)
+                    pid = str(placeholder_counter)
+                    placeholder_counter += 1
+                    local_map[pid] = block_html
+                    result_parts.append(f"φ{pid}φ")
+            else:
+                i += 1
+        
+        text_with_ph = "".join(result_parts)
+        text_with_ph = re.sub(r'\s+', ' ', text_with_ph).strip()
+        
+        return text_with_ph, local_map
+
+
+    def _handle_drop_cap(self, prefix_parts: List[str], middle_parts: List[str], 
+                         middle_types: List[str]) -> Tuple[List[str], List[str], List[str]]:
+        """
+        处理 Drop Cap（首字母放大）样式
+        
+        典型模式：<span class="dropcap">T</span>his is...
+        问题：前缀会包含 <span>T</span>，但 T 是 This 的一部分
+        
+        处理：
+        1. 检测前缀末尾是否为 "格式化的单个大写字母"
+        2. 检测中间部分首个文本是否以小写字母开头
+        3. 如果两者组合成一个单词，移除格式，将纯字母加入中间部分
+        """
+        if not prefix_parts or not middle_parts:
+            return prefix_parts, middle_parts, middle_types
+        
+        # 提取前缀中的文本内容
+        prefix_text = ""
+        last_text_idx = -1
+        for i, part in enumerate(prefix_parts):
+            if not part.startswith('<'):
+                prefix_text = part.strip()
+                last_text_idx = i
+        
+        # 检测是否为单个大写字母
+        if not prefix_text or len(prefix_text) != 1 or not prefix_text.isupper():
+            return prefix_parts, middle_parts, middle_types
+        
+        # 检测中间部分第一个可翻译文本
+        first_middle_text = ""
+        first_middle_idx = -1
+        for i, (part, ptype) in enumerate(zip(middle_parts, middle_types)):
+            if ptype == 'translatable':
+                first_middle_text = part.strip()
+                first_middle_idx = i
+                break
+        
+        if not first_middle_text:
+            return prefix_parts, middle_parts, middle_types
+        
+        # Drop Cap 检测条件（满足任一即可）:
+        # 1. 后续文本以小写字母开头: T + his = This
+        # 2. 后续文本以大写字母开头且紧连（无空格）: I + N OCTOBER = IN OCTOBER
+        is_drop_cap = False
+        first_char = first_middle_text[0] if first_middle_text else ''
+        
+        if first_char.islower():
+            # 条件1: This 模式
+            is_drop_cap = True
+        elif first_char.isupper():
+            # 条件2: IN OCTOBER 模式 - 检查是否紧连（第一个字母后不应有空格）
+            # 原始 HTML 中 </span>N 表示 N 紧跟在 I 后面
+            is_drop_cap = True
+        
+        if not is_drop_cap:
+            return prefix_parts, middle_parts, middle_types
+        
+        # 组合检测：大写字母 + 后续文本的第一个单词
+        combined = prefix_text + first_middle_text.split()[0] if first_middle_text else ""
+        
+        # 验证：组合后是否为合理的英文单词/大写序列（至少 2 个字母）
+        if len(combined) >= 2 and combined.isalpha():
+            # 确认是 Drop Cap，移除格式
+            # 从前缀中移除这个字母和其包裹的格式标签
+            new_prefix = []
+            skip_until_close = False
+            found_letter = False
+            
+            for part in prefix_parts:
+                if part.startswith('<') and not part.startswith('</'):
+                    # 开始标签，准备跳过
+                    skip_until_close = True
+                elif part.startswith('</'):
+                    # 结束标签
+                    if skip_until_close:
+                        skip_until_close = False
+                        continue
+                    new_prefix.append(part)
+                elif part.strip() == prefix_text:
+                    # 这是那个大写字母，跳过
+                    found_letter = True
+                    continue
+                else:
+                    if not skip_until_close:
+                        new_prefix.append(part)
+            
+            if found_letter:
+                # 将大写字母加到中间部分第一个可翻译文本的开头
+                middle_parts = middle_parts.copy()
+                middle_parts[first_middle_idx] = prefix_text + middle_parts[first_middle_idx]
+                prefix_parts = new_prefix
+        
+        return prefix_parts, middle_parts, middle_types
+
+
+    def _is_translatable_text(self, text: str) -> bool:
+        """
+        判断文本是否需要翻译（包含可翻译的单词）
+        
+        条件（满足任一即可）：
+        1. 包含 3 个及以上连续字母（如 "and", "Art", "War"）
+        2. 包含空格分隔的多个单词（如 "and Sun Tzu's"）
+        """
+        text = text.strip()
+        if not text:
+            return False
+        # 条件1: 3 个及以上连续字母
+        if re.search(r'[a-zA-Z]{3,}', text):
+            return True
+        # 条件2: 包含空格的多单词文本（如 "a of"）
+        if ' ' in text and re.search(r'[a-zA-Z]', text):
+            return True
+        return False
+
+    def _is_formula_element(self, element: Tag, text_content: str) -> bool:
+        """判断元素是否为公式元素（应整体保留不翻译）"""
+        if not text_content:
+            return True
+        if len(text_content) <= 3:
+            return True
+        if re.search(r'[a-zA-Z]{4,}', text_content):
+            return False
+        return bool(self.FORMULA_CHARS.match(text_content))
+
+    def _get_opening_tag(self, element: Tag) -> str:
+        """获取元素的开始标签（含属性）"""
+        attrs_str = ""
+        for key, value in element.attrs.items():
+            if isinstance(value, list):
+                value = " ".join(value)
+            attrs_str += f' {key}="{value}"'
+        return f"<{element.name}{attrs_str}>"
+
+    def reset(self):
+        """兼容旧接口"""
+        pass

src/format_restorer.py

@@ -0,0 +1,89 @@
+"""
+格式恢复模块 (优化版 v4)
+
+负责：
+1. 解析译文中的配对占位符 (φ1φ...φ/1φ)
+2. 还原前缀和后缀标签（_prefix, _suffix）
+3. 从映射表中查找对应的 HTML 片段并替换
+"""
+
+import re
+from typing import Dict, Tuple, List, Optional
+from loguru import logger
+
+
+class FormatRestorer:
+    """
+    格式恢复器 (优化版 v4)
+    
+    支持：
+    - 配对占位符 φ1φ...φ/1φ
+    - 前缀/后缀自动回填 (_prefix, _suffix)
+    """
+    
+    # 占位符正则: φ1φ, φ/1φ, φ12φ, φ/12φ (支持配对格式)
+    PLACEHOLDER_REGEX = re.compile(r'φ(/?\d+)φ')
+
+    def restore(self, text_with_placeholders: str, placeholder_map: Dict[str, str]) -> Tuple[str, bool]:
+        """
+        将带占位符的文本还原为 HTML
+        
+        自动处理 _prefix 和 _suffix 键，以及配对占位符 φ1φ...φ/1φ
+        
+        Returns:
+            (html_string, success): 还原后的 HTML 和是否完全成功的标志
+        """
+        if not placeholder_map:
+            return text_with_placeholders or "", True
+            
+        if not text_with_placeholders:
+            # 没有文本，只有前缀/后缀（如空元素）
+            prefix = placeholder_map.get("_prefix", "")
+            suffix = placeholder_map.get("_suffix", "")
+            return prefix + suffix, True
+
+        # 提取前缀和后缀
+        prefix = placeholder_map.get("_prefix", "")
+        suffix = placeholder_map.get("_suffix", "")
+        
+        # 创建只包含占位符键的映射（排除 _prefix, _suffix）
+        inner_map = {k: v for k, v in placeholder_map.items() if not k.startswith("_")}
+        
+        # 校验占位符
+        found_ids = set(self.PLACEHOLDER_REGEX.findall(text_with_placeholders))
+        expected_ids = set(inner_map.keys())
+        
+        success = True
+        missing_ids = expected_ids - found_ids
+        if missing_ids:
+            logger.warning(f"格式还原警告: 丢失占位符 {missing_ids}")
+            success = False
+            
+        unknown_ids = found_ids - expected_ids
+        if unknown_ids:
+            logger.warning(f"格式还原警告: 发现未知占位符 {unknown_ids}")
+            success = False  # 未知占位符也视为问题
+
+        # 替换占位符
+        def replace_match(match):
+            pid = match.group(1)  # 可能是 "1" 或 "/1"
+            if pid in inner_map:
+                return inner_map[pid]
+            else:
+                return ""  # 删除未知占位符
+
+        try:
+            # 还原占位符
+            restored_inner = self.PLACEHOLDER_REGEX.sub(replace_match, text_with_placeholders)
+            
+            # 添加前缀和后缀
+            restored_html = prefix + restored_inner + suffix
+            
+            return restored_html, success
+        except Exception as e:
+            logger.error(f"格式还原失败: {e}")
+            return prefix + self._strip_placeholders(text_with_placeholders) + suffix, False
+
+    def _strip_placeholders(self, text: str) -> str:
+        """移除所有 φ...φ 占位符"""
+        return self.PLACEHOLDER_REGEX.sub("", text)

src/llm_client.py

@@ -0,0 +1,249 @@
+"""
+LLM Client Module - Generic OpenAI Compatible
+
+Features:
+1. Fully configurable via config.json (base_url, headers).
+2. Mode-aware prompt building (bilingual vs chinese).
+3. Format repair capability for chinese mode.
+"""
+
+import asyncio
+import json
+import re
+from openai import AsyncOpenAI
+from typing import List, Dict, Optional, Any
+from loguru import logger
+import time
+from tenacity import retry, stop_after_attempt, wait_exponential
+from .manifest_manager import ManifestItem
+
+
+class RateLimiter:
+    """Rate limiter for concurrency and RPM."""
+    def __init__(self, requests_per_minute: int, concurrent_requests: int):
+        self.semaphore = asyncio.Semaphore(concurrent_requests)
+        self.min_interval = 60.0 / requests_per_minute if requests_per_minute > 0 else 0
+        self.last_request_time = 0
+        self._lock = asyncio.Lock()
+
+    async def acquire(self):
+        await self.semaphore.acquire()
+        async with self._lock:
+            current_time = time.time()
+            wait_time = self.min_interval - (current_time - self.last_request_time)
+            if wait_time > 0:
+                await asyncio.sleep(wait_time)
+            self.last_request_time = time.time()
+
+    def release(self):
+        self.semaphore.release()
+
+
+class LLMClient:
+    """Generic OpenAI-compatible API Client."""
+    
+    def __init__(self, config: Dict):
+        self.config = config
+        llm_config = config["llm"]
+        
+        api_key = llm_config.get("api_key")
+        base_url = llm_config.get("base_url")
+        extra_headers = llm_config.get("extra_headers", {})
+        
+        if not api_key:
+            raise ValueError("API Key is missing in config")
+            
+        self.client = AsyncOpenAI(
+            base_url=base_url,
+            api_key=api_key,
+            default_headers=extra_headers
+        )
+        
+        self.models = llm_config.get("models", {"fast": "gpt-3.5-turbo", "smart": "gpt-4"})
+        
+        self.rate_limiter = RateLimiter(
+            llm_config["rate_limits"]["requests_per_minute"],
+            llm_config["rate_limits"]["concurrent_requests"]
+        )
+        self.prompts = self._load_prompts()
+
+    def _load_prompts(self) -> Dict:
+        try:
+            with open("config/prompts.json", "r", encoding="utf-8") as f:
+                return json.load(f)
+        except:
+            return {}
+
+    async def translate_chunk(self, items: List[ManifestItem], glossary: Dict = None, 
+                              instruction: str = None, model_type: str = "fast",
+                              mode: str = "bilingual") -> Dict[str, str]:
+        """
+        Translate a chunk of items.
+        
+        Args:
+            items: List of ManifestItem to translate
+            glossary: Term dictionary
+            instruction: Style guide
+            model_type: "fast" or "smart"
+            mode: "bilingual" or "chinese"
+        """
+        if not items: return {}
+        
+        model = self.models.get(model_type, self.models.get("fast"))
+        prompt = self._build_prompt(items, mode)
+        
+        try:
+            # Build System Prompt
+            base_sys_prompt = self.prompts.get("translation", {}).get("system", "You are a professional translator.")
+            
+            # 中文模式：添加占位符保护指令
+            if mode == "chinese":
+                base_sys_prompt += """
+
+Placeholder Instructions (CRITICAL):
+1. Text contains PAIRED placeholders: φNφ (start) and φ/Nφ (end), like HTML tags.
+2. Example: "φ1φTable Talkφ/1φ" means italic text, translate as "φ1φ桌谈φ/1φ"
+3. Single placeholders φNφ without φ/Nφ are inline elements (footnotes, formulas) - keep them in place.
+4. RULES:
+   - DO NOT create new placeholder numbers that don't exist in the original
+   - DO NOT remove or modify existing placeholders
+   - Keep placeholders in the SAME relative position in your translation
+   - If word order changes, keep placeholders with their associated text
+5. Each line starts with paragraph ID (p_xxxxx). Preserve them.
+"""
+
+            
+            if instruction:
+                base_sys_prompt += f"\n\nBook Style Guide:\n{instruction}"
+            
+            if glossary:
+                glossary_text = "\n".join([f"{k} -> {v}" for k, v in glossary.items()])
+                base_sys_prompt += f"\n\nTerminology:\n{glossary_text}"
+            
+            # Strict formatting instructions
+            base_sys_prompt += "\n\nRequirements:\n1. Each line MUST start with ID (p_xxxxx).\n2. DO NOT modify IDs.\n3. Return only translations."
+
+            raw_response = await self._make_request(model, base_sys_prompt, prompt)
+            
+            if not raw_response:
+                return {item.global_id: f"[Error - Empty Response]" for item in items}
+            
+            return self._simple_parse(raw_response, items, mode)
+            
+        except Exception as e:
+            logger.error(f"Translation failed ({model}): {e}")
+            return {item.global_id: f"[Error - {str(e)}]" for item in items}
+
+    async def repair_format(self, original_text: str, broken_translation: str) -> str:
+        """
+        修复翻译格式：将占位符正确插入到译文中。
+        """
+        model = self.models.get("fast")
+        
+        system_prompt = "You are a format repair assistant. Your ONLY job is to insert placeholders into the translation."
+        user_prompt = f"""
+Original Text (with placeholders):
+{original_text}
+
+Translation (placeholders missing/incorrect):
+{broken_translation}
+
+Task:
+Please rewrite the Translation to include ALL placeholders (φcXXXXXφ) from the Original Text.
+1. DO NOT translate again. Keep the meaning of the Translation.
+2. Place φcXXXXXφ tags exactly where they correspond to the original format (bold, italic, links).
+3. Output ONLY the fixed translation.
+"""
+        try:
+            return await self._make_request(model, system_prompt, user_prompt)
+        except Exception as e:
+            logger.error(f"Format repair failed: {e}")
+            return broken_translation
+
+    async def raw_chat_completion(self, system_prompt: str, user_prompt: str, model_type: str = "smart") -> str:
+        """Generic chat completion (for Profiler)."""
+        model = self.models.get(model_type, self.models.get("smart"))
+        return await self._make_request(model, system_prompt, user_prompt)
+
+    def _build_prompt(self, items: List[ManifestItem], mode: str = "bilingual") -> str:
+        """构建翻译提示词"""
+        lines = []
+        for item in items:
+            if mode == "chinese":
+                # 中文模式：使用带占位符的文本和段落类型
+                text = item.text_with_placeholders if item.text_with_placeholders else item.clean_text
+                p_type = getattr(item, 'paragraph_type', 'body').upper()
+                lines.append(f"{item.global_id} [{p_type}] {text}")
+            else:
+                # 双语模式：使用纯文本
+                lines.append(f"{item.global_id} {item.clean_text}")
+        return "\n".join(lines)
+
+    def _simple_parse(self, response: str, items: List[ManifestItem], mode: str = "bilingual") -> Dict[str, str]:
+        """解析 LLM 响应"""
+        results = {}
+        for i, item in enumerate(items):
+            current_id = item.global_id
+            start_idx = response.find(current_id)
+            if start_idx == -1: continue
+            
+            end_idx = len(response)
+            if i + 1 < len(items):
+                next_id = items[i+1].global_id
+                next_found = response.find(next_id, start_idx + len(current_id))
+                if next_found != -1:
+                    end_idx = next_found
+            
+            content = response[start_idx:end_idx].strip()
+            clean_content = content[len(current_id):].strip()
+            clean_content = clean_content.lstrip(":： \t")
+            
+            # 移除类型标记 (如 [BODY])
+            if mode == "chinese":
+                clean_content = re.sub(r'^\[[A-Z]+\]\s*', '', clean_content)
+                
+            if clean_content:
+                results[current_id] = clean_content
+
+        # Fallback: 逐行解析
+        if len(results) < len(items):
+            for line in response.split("\n"):
+                line = line.strip()
+                for item in items:
+                    if item.global_id not in results and line.startswith(item.global_id):
+                        res = line[len(item.global_id):].strip().lstrip(":： ")
+                        if mode == "chinese":
+                            res = re.sub(r'^\[[A-Z]+\]\s*', '', res)
+                        if res: results[item.global_id] = res
+        
+        # 验证解析结果
+        parsed_count = len(results)
+        expected_count = len(items)
+        if parsed_count < expected_count:
+            missing_ids = [item.global_id for item in items if item.global_id not in results]
+            logger.warning(f"LLM 响应解析不完整: {parsed_count}/{expected_count} (缺失: {missing_ids[:3]}...)")
+        
+        return results
+
+    @retry(stop=stop_after_attempt(3), wait=wait_exponential(multiplier=1, min=2, max=10))
+    async def _make_request(self, model: str, system_prompt: str, user_prompt: str) -> str:
+        await self.rate_limiter.acquire()
+        try:
+            resp = await self.client.chat.completions.create(
+                model=model,
+                messages=[
+                    {"role": "system", "content": system_prompt},
+                    {"role": "user", "content": user_prompt}
+                ],
+                temperature=self.config['translation'].get('temperature', 0.2),
+                max_tokens=8000
+            )
+            return resp.choices[0].message.content.strip()
+        finally:
+            self.rate_limiter.release()
+
+    async def close(self):
+        await self.client.close()
+
+# Alias for backward compatibility
+OpenRouterClient = LLMClient

src/manifest_manager.py

@@ -0,0 +1,180 @@
+"""
+Manifest 管理器模块 (Manifest Manager Module)
+
+该模块是系统的单一真理源 (SSOT)。
+它记录了每一段文本的原始状态、清洗后的文本、哈希值以及翻译状态。
+所有对翻译流程的操作（提取、翻译、回填）都必须通过修改此 Manifest 进行。
+"""
+
+import json
+import os
+import hashlib
+from typing import List, Dict, Optional, Any
+from pathlib import Path
+from loguru import logger
+from dataclasses import dataclass, asdict, field
+
+@dataclass
+class ManifestItem:
+    """代表一个翻译单元（通常是一个段落）"""
+    global_id: str
+    source_file: str
+    original_html: str
+    clean_text: str
+    text_hash: str
+    tag: str
+    tag_attrs: Dict[str, Any] = field(default_factory=dict) # 外层标签的属性 (class, style...)
+    translation: Optional[str] = None
+    status: str = "pending"  # pending, translated, ignored, failed
+    error_msg: Optional[str] = None
+    model_used: Optional[str] = None  # 记录使用的模型
+    quality_score: Optional[int] = None # 记录质量评分
+    
+    # === 中文模式专用字段 ===
+    text_with_placeholders: str = ""           # 带占位符的文本
+    placeholder_map: Dict[str, str] = field(default_factory=dict)     # 占位符映射表 {id: html_string}
+    paragraph_type: str = "body"               # 段落类型：chapter/section/subsection/epigraph/body
+    translation_with_placeholders: str = ""    # 带占位符的译文
+    translation_with_original_html: str = ""   # 还原后的最终 HTML (中文模式)
+    
+    metadata: Dict[str, Any] = field(default_factory=dict)
+
+    def to_dict(self):
+        return asdict(self)
+
+class ManifestManager:
+    """
+    负责 Manifest 的生命周期管理。
+    """
+    
+    def __init__(self, manifest_path: str):
+        self.manifest_path = Path(manifest_path)
+        self.data: Dict[str, Any] = {
+            "book_id": "",
+            "metadata": {},
+            "chapter_range": {
+                "start_title": None,
+                "end_title": None,
+                "included_files": []
+            },
+            "items": []
+        }
+        self._items_by_id: Dict[str, ManifestItem] = {}
+
+    def load(self) -> bool:
+        """从文件加载 Manifest。如果文件不存在则返回 False。"""
+        if self.manifest_path.exists():
+            try:
+                with open(self.manifest_path, 'r', encoding='utf-8') as f:
+                    self.data = json.load(f)
+                
+                # 重建对象映射
+                self._items_by_id = {
+                    item['global_id']: ManifestItem(**item)
+                    for item in self.data["items"]
+                }
+                logger.info(f"成功从 {self.manifest_path} 加载 Manifest, 包含 {len(self._items_by_id)} 个项目")
+                return True
+            except Exception as e:
+                logger.error(f"加载 Manifest 失败: {e}")
+                return False
+        return False
+
+    def save(self):
+        """将当前状态保存到 Manifest 文件。"""
+        # 确保目录存在
+        self.manifest_path.parent.mkdir(parents=True, exist_ok=True)
+        
+        # 同步 items 到 data 字典
+        self.data["items"] = [item.to_dict() for item in self._items_by_id.values()]
+        
+        with open(self.manifest_path, 'w', encoding='utf-8') as f:
+            json.dump(self.data, f, ensure_ascii=False, indent=2)
+        # logger.debug(f"Manifest 已保存到 {self.manifest_path}")
+
+    def init_manifest(self, book_id: str, metadata: Dict, chapter_range: Dict = None):
+        """初始化一个新的 Manifest。"""
+        self.data = {
+            "book_id": book_id,
+            "metadata": metadata,
+            "chapter_range": chapter_range or {
+                "start_title": None,
+                "end_title": None,
+                "included_files": []
+            },
+            "items": []
+        }
+        self._items_by_id = {}
+        self.save()
+    
+    def get_chapter_range(self) -> Dict:
+        """获取记录的章节范围"""
+        return self.data.get("chapter_range", {})
+
+    def add_item(self, source_file: str, original_html: str, clean_text: str, tag: str, metadata: Dict = None) -> ManifestItem:
+        """添加一个新的翻译项并分配 ID。"""
+        # 生成全局 ID
+        new_index = len(self._items_by_id) + 1
+        global_id = f"p_{new_index:05d}"
+        
+        # 生成内容哈希 (用于排重和缓存)
+        text_hash = hashlib.sha256(clean_text.encode('utf-8')).hexdigest()
+        
+        item = ManifestItem(
+            global_id=global_id,
+            source_file=source_file,
+            original_html=original_html,
+            clean_text=clean_text,
+            text_hash=text_hash,
+            tag=tag,
+            metadata=metadata or {}
+        )
+        
+        self._items_by_id[global_id] = item
+        return item
+
+    def get_items(self, status: str = None, file_name: str = None) -> List[ManifestItem]:
+        """按状态或文件名查询项目。"""
+        items = list(self._items_by_id.values())
+        if status:
+            items = [i for i in items if i.status == status]
+        if file_name:
+            items = [i for i in items if i.source_file == file_name]
+        
+        # 必须按 ID 顺序返回以保证分块正确
+        return sorted(items, key=lambda x: x.global_id)
+
+    def update_item(self, global_id: str, translation: str, status: str = "translated", error: str = None, model: str = None, score: int = None):
+        """更新翻译结果。"""
+        if global_id in self._items_by_id:
+            item = self._items_by_id[global_id]
+            if translation is not None:
+                item.translation = translation
+            item.status = status
+            if error:
+                item.error_msg = error
+            if model:
+                item.model_used = model
+            if score is not None:
+                item.quality_score = score
+        else:
+            logger.warning(f"尝试更新不存在的 ID: {global_id}")
+
+    @property
+    def stats(self) -> Dict:
+        """获取翻译进度统计。"""
+        total = len(self._items_by_id)
+        if total == 0: return {"progress": "0%"}
+        
+        translated = sum(1 for i in self._items_by_id.values() if i.status == "translated")
+        ignored = sum(1 for i in self._items_by_id.values() if i.status == "ignored")
+        failed = sum(1 for i in self._items_by_id.values() if i.status == "failed")
+        
+        return {
+            "total": total,
+            "translated": translated,
+            "ignored": ignored,
+            "failed": failed,
+            "pending": total - translated - ignored - failed,
+            "progress_percent": round((translated + ignored) / total * 100, 1)
+        }

src/quality_manager.py

@@ -0,0 +1,87 @@
+"""
+Quality Manager Module
+
+Responsible for evaluating translation quality and deciding on re-translation.
+"""
+
+import json
+import random
+from typing import List, Dict, Any, Tuple
+from loguru import logger
+from .manifest_manager import ManifestItem
+from .llm_client import LLMClient
+
+class QualityManager:
+    def __init__(self, config: Dict, llm_client: LLMClient):
+        self.config = config
+        self.llm_client = llm_client
+        self.qc_config = config['translation'].get('quality_control', {})
+        self.pass_score = self.qc_config.get('pass_score', 7)
+        self.sample_size = self.qc_config.get('sample_size', 2)
+
+    async def evaluate_chunk(self, chunk: List[ManifestItem]) -> Tuple[bool, int, str]:
+        """
+        Evaluate a chunk of translations.
+        
+        Returns:
+            (passed: bool, average_score: int, reason: str)
+        """
+        if not self.qc_config.get('enabled', False):
+            return True, 10, "QC Disabled"
+
+        # 1. Sample items
+        # Filter for items that actually have content and translations
+        valid_items = [item for item in chunk if item.translation and len(item.clean_text) > 20]
+        
+        if not valid_items:
+            return True, 10, "No valid items to sample"
+            
+        sample_items = random.sample(valid_items, min(len(valid_items), self.sample_size))
+        
+        # 2. Build Prompt
+        prompt = self._build_evaluation_prompt(sample_items)
+        
+        # 3. Call LLM (Smart)
+        try:
+            response = await self.llm_client.raw_chat_completion(
+                system_prompt="You are a professional translation editor.",
+                user_prompt=prompt,
+                model_type="smart"
+            )
+            
+            # 4. Parse JSON
+            # Clean potential markdown
+            json_str = response.strip()
+            if "```json" in json_str:
+                json_str = json_str.split("```json")[1].split("```")[0].strip()
+            elif "```" in json_str:
+                json_str = json_str.split("```")[1].split("```")[0].strip()
+                
+            result = json.loads(json_str)
+            score = result.get('score', 0)
+            reason = result.get('reason', 'No reason provided')
+            
+            passed = score >= self.pass_score
+            return passed, score, reason
+            
+        except Exception as e:
+            logger.error(f"QC evaluation failed: {e}")
+            # If QC fails, we default to PASS to avoid blocking progress, but log it
+            return True, 0, f"QC Error: {e}"
+
+    def _build_evaluation_prompt(self, items: List[ManifestItem]) -> str:
+        content = ""
+        for i, item in enumerate(items, 1):
+            content += f"Item {i}:\nOriginal: {item.clean_text}\nTranslation: {item.translation}\n\n"
+            
+        return f"""Please evaluate the following translations (English to Chinese).
+Focus on accuracy, fluency, and terminology consistency.
+
+Items to evaluate:
+{content}
+
+Return a JSON object with:
+- \"score\": An integer from 1 to 10 (10 being perfect).
+- \"reason\": A brief explanation of the score.
+
+JSON Output:"""

src/text_processor.py

@@ -0,0 +1,273 @@
+"""
+文本处理器模块 (Text Processor Module) - Manifest 驱动版
+
+该模块专注于 HTML 文档的遍历和段落提取。
+它不再维护全局状态，而是将提取的内容注册到 ManifestManager 中。
+"""
+
+import re
+from bs4 import BeautifulSoup
+from typing import List, Dict, Any
+from loguru import logger
+from .manifest_manager import ManifestManager
+from .format_extractor import FormatExtractor
+
+
+class TextProcessor:
+    """
+    负责从 HTML 中识别有效段落并进行清洗。
+    """
+    
+    def __init__(self, config: Dict):
+        """
+        Args:
+            config (Dict): 全局配置。
+        """
+        self.config = config
+        self.chunk_size = config['translation'].get('chunk_size', 5000)
+        self.format_extractor = FormatExtractor()
+        
+    def extract_to_manifest(self, html_content: str, source_file: str, manifest: ManifestManager, mode: str = "bilingual"):
+        """
+        解析 HTML 内容，并将识别出的段落注册到 Manifest 中。
+
+        Args:
+            html_content (str): HTML 源码。
+            source_file (str): 来源文件名。
+            manifest (ManifestManager): 清单管理器实例。
+            mode (str): 翻译模式 - "bilingual" 或 "chinese"
+        """
+        try:
+            soup = BeautifulSoup(html_content, 'html.parser')
+            
+            # 1. 移除不需要的元素
+            for element in soup(['script', 'style', 'meta', 'link']):
+                element.decompose()
+            
+            # 2. 获取有效的文本元素 (使用静态过滤逻辑)
+            text_elements = self.get_valid_text_elements(soup)
+            
+            # 3. 注册到 Manifest
+            for element in text_elements:
+                clean_text = self.clean_element_text(element)
+                
+                # 过滤逻辑
+                if not clean_text:
+                    continue
+                
+                status = "pending"
+                # 如果是导航元素，标记为 ignored
+                if self.is_navigation_element(element):
+                    status = "ignored"
+                
+                # 提取格式信息（中文模式）
+                text_with_ph = ""
+                placeholder_map = None
+                p_type = "body"
+                
+                # 检查是否是嵌套容器
+                is_nested = self.is_nested_container(element)
+                
+                if mode == "chinese":
+                    if is_nested:
+                        # 嵌套容器：先移除子块，再提取
+                        element_html = self._get_element_without_nested_blocks(element)
+                        clean_text, text_with_ph, placeholder_map, p_type = self.format_extractor.extract(element_html)
+                    else:
+                        # 普通元素：直接提取
+                        clean_text, text_with_ph, placeholder_map, p_type = self.format_extractor.extract(str(element))
+                
+                # 注册
+                item = manifest.add_item(
+                    source_file=source_file,
+                    original_html=str(element) if not is_nested else self._get_element_without_nested_blocks(element),
+                    clean_text=clean_text,
+                    tag=element.name,
+                    metadata={"status": status}
+                )
+                item.tag_attrs = element.attrs  # 存储外层标签属性
+                
+                # 更新中文模式字段
+                if mode == "chinese":
+                    item.text_with_placeholders = text_with_ph
+                    item.placeholder_map = placeholder_map
+                    item.paragraph_type = p_type
+                
+                # 同步更新 manifest 状态 (如果需要过滤)
+                if status == "ignored":
+                    manifest.update_item(item.global_id, translation=None, status="ignored")
+
+        except Exception as e:
+            logger.error(f"从 {source_file} 提取段落失败: {e}")
+
+    # 类变量：存储需要特殊处理的元素（包含嵌套块的容器）
+    _nested_container_ids = set()
+    
+    @classmethod
+    def get_valid_text_elements(cls, soup) -> List:
+        """
+        获取有效的文本容器元素（返回原始元素，不是副本）。
+        
+        对于包含嵌套块的容器元素：
+        1. 仍然返回原始元素
+        2. 在 _nested_container_ids 中记录其 id
+        3. 这些元素在回填时需要特殊处理
+        """
+        block_tags = ['p', 'div', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'blockquote', 'li', 'td']
+        all_candidates = soup.find_all(block_tags)
+        candidate_set = set(all_candidates)
+        
+        cls._nested_container_ids = set()  # 重置
+        final_elements = []
+        processed_ids = set()
+        
+        for element in all_candidates:
+            elem_id = id(element)
+            if elem_id in processed_ids:
+                continue
+            
+            # 找到此元素包含的子块
+            nested_blocks = [d for d in element.find_all(block_tags) if d in candidate_set]
+            
+            if not nested_blocks:
+                # 叶子节点，直接添加
+                final_elements.append(element)
+                processed_ids.add(elem_id)
+            else:
+                # 容器节点，检查是否有直接文本（不在子块中）
+                direct_text = cls.extract_direct_text(element)
+                
+                if len(direct_text.strip()) > 50:
+                    # 有价值的直接文本，添加原始元素并标记
+                    final_elements.append(element)
+                    cls._nested_container_ids.add(elem_id)
+                    processed_ids.add(elem_id)
+        
+        return final_elements
+    
+    @staticmethod
+    def extract_direct_text(element) -> str:
+        """
+        提取元素的直接文本内容（不包括嵌套块级元素中的文本）
+        """
+        block_tags = ['p', 'div', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'blockquote', 'li', 'td']
+        
+        # 创建副本进行分析
+        from bs4 import BeautifulSoup as BS
+        from bs4 import NavigableString
+        
+        element_copy = BS(str(element), 'html.parser').find(element.name)
+        if not element_copy:
+            return ""
+        
+        # 移除所有块级子元素
+        for nested in element_copy.find_all(block_tags):
+            nested.decompose()
+        
+        return element_copy.get_text().strip()
+    
+    @classmethod
+    def is_nested_container(cls, element) -> bool:
+        """检查元素是否是包含嵌套块的容器（需要特殊回填处理）"""
+        return id(element) in cls._nested_container_ids
+    
+    @staticmethod
+    def _get_element_without_nested_blocks(element) -> str:
+        """
+        返回移除子块后的元素 HTML 字符串
+        
+        用于嵌套容器的提取，避免子块内容被提取两次
+        """
+        from bs4 import BeautifulSoup as BS
+        block_tags = ['p', 'div', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'blockquote', 'li', 'td']
+        
+        element_copy = BS(str(element), 'html.parser').find(element.name)
+        if not element_copy:
+            return str(element)
+        
+        # 移除所有块级子元素
+        for nested in element_copy.find_all(block_tags):
+            nested.decompose()
+        
+        return str(element_copy)
+    
+
+    @staticmethod
+    def clean_element_text(element) -> str:
+        """清理 HTML 元素，提取纯净的待翻译文本。"""
+        element_copy = element.__copy__()
+        
+        # 移除脚注引用等
+        for tag in element_copy.find_all(['sup', 'sub']):
+            tag.decompose()
+            
+        footnote_patterns = re.compile(r'footnote|endnote|reference|note|super|sub', re.I)
+        for tag in element_copy.find_all(['a', 'span', 'div'], class_=footnote_patterns):
+            tag.decompose()
+
+        # 移除仅包含数字的 span
+        for tag in element_copy.find_all('span'):
+            if re.match(r'^(\[\d+\]|\(\d+\)|\d+)$', tag.get_text().strip()):
+                tag.decompose()
+        
+        text = element_copy.get_text().strip()
+        # 正则清理残留引用标识 (如 sentence.2)
+        text = re.sub(r'(\.|。|，|,)\s*(\[\d+\]|\d+)(?=\s|$)', r'\1', text)
+        text = re.sub(r'\s+', ' ', text)
+        return text
+
+    @staticmethod
+    def is_navigation_element(element) -> bool:
+        """判断是否是无翻译价值的导航、页码元素。"""
+        classes = element.get('class', [])
+        nav_classes = ['nav', 'navigation', 'toc', 'menu', 'header', 'footer', 'page-number']
+        class_str = ' '.join(classes).lower() if isinstance(classes, list) else str(classes).lower()
+        
+        if any(nc in class_str for nc in nav_classes):
+            return True
+            
+        # 检查父级
+        parent = element.parent
+        if parent:
+            p_classes = parent.get('class', [])
+            p_class_str = ' '.join(p_classes).lower() if isinstance(p_classes, list) else str(p_classes).lower()
+            if any(nc in p_class_str for nc in nav_classes):
+                return True
+        return False
+
+    def create_chunks_from_manifest(self, manifest: ManifestManager, mode: str = "bilingual") -> List[List[Any]]:
+        """
+        从 Manifest 中筛选待翻译项目并分块。
+        
+        Args:
+            manifest: ManifestManager 实例
+            mode: 翻译模式 (保留参数以供将来使用)
+        """
+        pending_items = manifest.get_items(status="pending")
+        if not pending_items:
+            return []
+            
+        chunks = []
+        current_chunk = []
+        current_size = 0
+        
+        for item in pending_items:
+            # 中文模式使用带占位符的文本长度
+            if mode == "chinese" and item.text_with_placeholders:
+                text_len = len(item.text_with_placeholders)
+            else:
+                text_len = len(item.clean_text)
+                
+            if current_size + text_len > self.chunk_size and current_chunk:
+                chunks.append(current_chunk)
+                current_chunk = []
+                current_size = 0
+            
+            current_chunk.append(item)
+            current_size += text_len
+            
+        if current_chunk:
+            chunks.append(current_chunk)
+            
+        logger.info(f"分块完成: 共有 {len(pending_items)} 个待翻译项，分为 {len(chunks)} 个块")
+        return chunks

src/toc_parser.py

@@ -0,0 +1,411 @@
+"""
+TOC 解析器模块 (TOC Parser Module)
+
+该模块负责从 EPUB 文件中提取目录结构，并提供章节范围选择功能。
+支持嵌套的目录结构（如 Part -> Chapter）。
+"""
+
+from dataclasses import dataclass
+from typing import List, Set, Optional, Tuple
+from ebooklib import epub
+from loguru import logger
+from urllib.parse import urlparse
+
+
+@dataclass
+class TOCItem:
+    """代表一个目录项"""
+    index: int              # 序号 (1-based)
+    title: str              # 章节标题
+    href: str               # 文件路径 (如 index_split_003.html 或 e9781668053393/xhtml/ch01.xhtml)
+    file_name: str          # 纯文件名 (不含锚点)
+    level: int              # 层级 (0=顶级, 1=子章节, 2=子子章节)
+    skip_reason: str = ""   # 跳过原因: 'front', 'back', 或空字符串表示不跳过
+
+
+# 前置部分 - 通常不需要翻译
+FRONT_MATTER_PATTERNS = [
+    'cover', 'title page', 'copyright', 'contents', 
+    'table of contents', 'half title', 'halftitle',
+    'how to use this ebook', 'copyright page'
+]
+
+# 后置部分 - 通常不需要翻译
+# 注意：使用精确匹配避免误伤，如 "notes" 会匹配 "Technical Notes"
+BACK_MATTER_PATTERNS = [
+    'endnotes', 'footnotes', 'bibliography', 
+    'references', 'index', 'about the author', 
+    'about the publisher', 'credits', 'appendix',
+    'glossary', 'also by', 'resources for'
+]
+
+# 需要精确匹配的模式（标题必须完全等于这些值）
+BACK_MATTER_EXACT = [
+    'notes'  # 精确匹配，避免匹配 "Technical Notes"
+]
+    
+
+class TOCParser:
+    """
+    TOC 解析器
+    
+    从 EPUB 提取扁平化的目录列表，并支持章节范围选择。
+    """
+    
+    def __init__(self, book: epub.EpubBook):
+        self.book = book
+        self._toc_items: List[TOCItem] = []
+        self._parse_toc()
+        self._classify_all_chapters()
+    
+    def _parse_toc(self):
+        """解析 book.toc，构建扁平化的目录列表"""
+        self._toc_items = []
+        index = [0]  # 使用列表以便在嵌套函数中修改
+        
+        def traverse(toc_list, level=0):
+            for item in toc_list:
+                if isinstance(item, tuple):
+                    # 嵌套结构: (section, children)
+                    section, children = item
+                    index[0] += 1
+                    href = section.href if hasattr(section, 'href') else ""
+                    file_name = self._extract_file_name(href)
+                    self._toc_items.append(TOCItem(
+                        index=index[0],
+                        title=section.title if hasattr(section, 'title') else str(section),
+                        href=href,
+                        file_name=file_name,
+                        level=level
+                    ))
+                    # 递归处理子节点
+                    traverse(children, level + 1)
+                else:
+                    # 叶子节点
+                    index[0] += 1
+                    href = item.href if hasattr(item, 'href') else ""
+                    file_name = self._extract_file_name(href)
+                    self._toc_items.append(TOCItem(
+                        index=index[0],
+                        title=item.title if hasattr(item, 'title') else str(item),
+                        href=href,
+                        file_name=file_name,
+                        level=level
+                    ))
+        
+        traverse(self.book.toc)
+        logger.debug(f"解析 TOC 完成，共 {len(self._toc_items)} 个章节")
+    
+    def _classify_chapter(self, title: str) -> str:
+        """
+        分类单个章节
+        
+        Returns:
+            'front': 前置部分（跳过）
+            'back': 后置部分（跳过）
+            '': 正文内容（保留）
+        """
+        title_lower = title.lower().strip()
+        
+        # 检查前置部分（模糊匹配）
+        for pattern in FRONT_MATTER_PATTERNS:
+            if pattern in title_lower or title_lower == pattern:
+                return 'front'
+        
+        # 检查后置部分（模糊匹配）
+        for pattern in BACK_MATTER_PATTERNS:
+            if pattern in title_lower or title_lower == pattern:
+                return 'back'
+        
+        # 检查后置部分（精确匹配）
+        for pattern in BACK_MATTER_EXACT:
+            if title_lower == pattern:
+                return 'back'
+        
+        return ''
+    
+    def _classify_all_chapters(self):
+        """对所有章节进行分类"""
+        for item in self._toc_items:
+            item.skip_reason = self._classify_chapter(item.title)
+        
+        # 统计跳过数量
+        front_count = sum(1 for i in self._toc_items if i.skip_reason == 'front')
+        back_count = sum(1 for i in self._toc_items if i.skip_reason == 'back')
+        if front_count or back_count:
+            logger.debug(f"章节分类: 跳过前置 {front_count} 个，跳过后置 {back_count} 个")
+    
+    def get_skip_files(self) -> Set[str]:
+        """获取应该跳过的文件集合"""
+        return {item.file_name for item in self._toc_items 
+                if item.skip_reason and item.file_name}
+    
+    def get_content_files(self) -> Set[str]:
+        """获取正文内容的文件集合（排除前置和后置）"""
+        return {item.file_name for item in self._toc_items 
+                if not item.skip_reason and item.file_name}
+    
+    def get_spine_files(self) -> List[str]:
+        """获取 Spine 中的所有文件（按阅读顺序）"""
+        spine_files = []
+        for item_tuple in self.book.spine:
+            item_id = item_tuple[0]
+            item = self.book.get_item_with_id(item_id)
+            if item:
+                spine_files.append(item.get_name())
+        return spine_files
+    
+    def get_content_files_from_spine(self) -> Set[str]:
+        """
+        基于 Spine 获取正文内容文件（排除前置和后置）
+        
+        核心逻辑：
+        1. 找到第一个正文章节在 Spine 中的位置
+        2. 找到最后一个正文章节在 Spine 中的位置  
+        3. 返回这个范围内的所有 Spine 文件
+        """
+        spine_files = self.get_spine_files()
+        if not spine_files:
+            return self.get_content_files()  # 降级到 TOC 文件
+        
+        # 获取正文和跳过的 TOC 文件
+        content_toc_files = self.get_content_files()
+        skip_toc_files = self.get_skip_files()
+        
+        if not content_toc_files:
+            return set(spine_files)  # 没有分类信息，返回所有
+        
+        # 在 Spine 中找到正文内容的边界
+        first_content_idx = None
+        last_content_idx = None
+        
+        for idx, spine_file in enumerate(spine_files):
+            if spine_file in content_toc_files:
+                if first_content_idx is None:
+                    first_content_idx = idx
+                last_content_idx = idx
+        
+        if first_content_idx is None:
+            return self.get_content_files()  # 降级
+        
+        # 收集边界内的所有 Spine 文件
+        result = set()
+        for idx in range(first_content_idx, last_content_idx + 1):
+            spine_file = spine_files[idx]
+            # 排除明确标记为跳过的文件
+            if spine_file not in skip_toc_files:
+                result.add(spine_file)
+        
+        logger.debug(f"Spine 正文范围: {first_content_idx+1} ~ {last_content_idx+1}，共 {len(result)} 个文件")
+        return result
+    
+    def get_spine_range(self, start_title: str = None, end_title: str = None) -> Tuple[Set[str], List[TOCItem]]:
+        """
+        基于 Spine 和 TOC 边界获取文件范围
+        
+        与 get_file_range 的区别：
+        - get_file_range: 只返回 TOC 中列出的文件
+        - get_spine_range: 返回 TOC 边界之间的所有 Spine 文件
+        """
+        spine_files = self.get_spine_files()
+        
+        # 确定 TOC 边界
+        start_item = self.find_by_title(start_title) if start_title else None
+        end_item = self.find_by_title(end_title) if end_title else None
+        
+        start_idx = start_item.index if start_item else 1
+        end_idx = end_item.index if end_item else len(self._toc_items)
+        
+        if start_idx > end_idx:
+            start_idx, end_idx = end_idx, start_idx
+        
+        # 获取选中的 TOC 项
+        selected_items = [i for i in self._toc_items if start_idx <= i.index <= end_idx]
+        selected_toc_files = {i.file_name for i in selected_items if i.file_name}
+        
+        # 在 Spine 中找到这些文件的边界
+        spine_start = None
+        spine_end = None
+        
+        for idx, spine_file in enumerate(spine_files):
+            if spine_file in selected_toc_files:
+                if spine_start is None:
+                    spine_start = idx
+                spine_end = idx
+        
+        if spine_start is None:
+            # 降级到 TOC 文件
+            logger.warning("无法在 Spine 中定位章节边界，使用 TOC 文件")
+            return selected_toc_files, selected_items
+        
+        # 扩展到下一个 TOC 章节之前
+        # 找到 end_idx 之后的下一个 TOC 章节在 Spine 中的位置
+        next_toc_file = None
+        if end_idx < len(self._toc_items):
+            next_toc_file = self._toc_items[end_idx].file_name  # end_idx 是 1-based
+        
+        if next_toc_file:
+            for idx, spine_file in enumerate(spine_files):
+                if spine_file == next_toc_file:
+                    spine_end = idx - 1  # 到下一章之前
+                    break
+        
+        # 收集 Spine 范围内的所有文件
+        result = set()
+        for idx in range(spine_start, spine_end + 1):
+            if idx < len(spine_files):
+                result.add(spine_files[idx])
+        
+        logger.info(f"Spine 范围: #{spine_start+1} ~ #{spine_end+1}，共 {len(result)} 个文件（TOC: {len(selected_toc_files)} 个）")
+        return result, selected_items
+    
+    def _extract_file_name(self, href: str) -> str:
+        """从 href 中提取纯文件名（去除锚点和路径前缀）"""
+        if not href:
+            return ""
+        # 去除锚点 (#section1)
+        path = href.split('#')[0]
+        # 返回完整路径（可能包含子目录）
+        return path
+    
+    @property
+    def items(self) -> List[TOCItem]:
+        """获取所有目录项"""
+        return self._toc_items
+    
+    def find_by_title(self, title: str, fuzzy: bool = True) -> Optional[TOCItem]:
+        """
+        根据标题查找目录项
+        
+        Args:
+            title: 章节标题
+            fuzzy: 是否模糊匹配（包含即可）
+        
+        Returns:
+            匹配的 TOCItem 或 None
+        """
+        title_lower = title.lower().strip()
+        
+        for item in self._toc_items:
+            item_title_lower = item.title.lower().strip()
+            
+            if fuzzy:
+                # 模糊匹配：互相包含
+                if title_lower in item_title_lower or item_title_lower in title_lower:
+                    return item
+            else:
+                # 精确匹配
+                if item_title_lower == title_lower:
+                    return item
+        
+        return None
+    
+    def find_by_index(self, index: int) -> Optional[TOCItem]:
+        """根据序号查找目录项 (1-based)"""
+        if 1 <= index <= len(self._toc_items):
+            return self._toc_items[index - 1]
+        return None
+    
+    def get_file_range(self, start_title: str = None, end_title: str = None,
+                       start_index: int = None, end_index: int = None) -> Tuple[Set[str], List[TOCItem]]:
+        """
+        获取指定范围内的文件集合
+        
+        支持两种方式指定范围：
+        1. 按标题: start_title ~ end_title
+        2. 按序号: start_index ~ end_index
+        
+        Returns:
+            (文件名集合, 选中的目录项列表)
+        """
+        # 确定起始位置
+        start_item = None
+        if start_title:
+            start_item = self.find_by_title(start_title)
+            if not start_item:
+                logger.warning(f"未找到起始章节: {start_title}")
+        elif start_index:
+            start_item = self.find_by_index(start_index)
+        
+        # 确定结束位置
+        end_item = None
+        if end_title:
+            end_item = self.find_by_title(end_title)
+            if not end_item:
+                logger.warning(f"未找到结束章节: {end_title}")
+        elif end_index:
+            end_item = self.find_by_index(end_index)
+        
+        # 默认值
+        start_idx = start_item.index if start_item else 1
+        end_idx = end_item.index if end_item else len(self._toc_items)
+        
+        # 确保顺序正确
+        if start_idx > end_idx:
+            start_idx, end_idx = end_idx, start_idx
+        
+        # 收集文件
+        selected_items = []
+        file_names = set()
+        
+        for item in self._toc_items:
+            if start_idx <= item.index <= end_idx:
+                selected_items.append(item)
+                if item.file_name:
+                    file_names.add(item.file_name)
+        
+        logger.info(f"选择范围: #{start_idx} ~ #{end_idx}，共 {len(file_names)} 个文件")
+        return file_names, selected_items
+    
+    def format_toc_table(self, selected_range: Tuple[int, int] = None, show_skip: bool = True) -> str:
+        """
+        格式化 TOC 为表格形式，用于终端显示
+        
+        Args:
+            selected_range: 可选的选中范围 (start_index, end_index)，用于高亮显示
+            show_skip: 是否显示跳过标记
+        
+        Returns:
+            格式化的表格字符串
+        """
+        if not self._toc_items:
+            return "目录为空"
+        
+        lines = []
+        lines.append("")
+        lines.append("=" * 75)
+        lines.append(f"{'#':>4}  {'状态':<6} {'章节名称':<35} {'文件'}")
+        lines.append("=" * 75)
+        
+        for item in self._toc_items:
+            indent = "  " * item.level
+            title_display = f"{indent}{item.title}"
+            if len(title_display) > 33:
+                title_display = title_display[:30] + "..."
+            
+            # 跳过状态标记
+            status = ""
+            if show_skip and item.skip_reason:
+                status = "[SKIP]" if item.skip_reason else ""
+            
+            # 如果在选中范围内，添加标记
+            marker = ""
+            if selected_range:
+                start_idx, end_idx = selected_range
+                if item.index == start_idx:
+                    marker = " ▶"
+                elif item.index == end_idx:
+                    marker = " ◀"
+                elif start_idx < item.index < end_idx:
+                    marker = " │"
+            
+            lines.append(f"{item.index:>4}{marker:2} {status:<6} {title_display:<35} {item.file_name}")
+        
+        lines.append("=" * 75)
+        
+        # 统计摘要
+        skip_count = sum(1 for i in self._toc_items if i.skip_reason)
+        content_count = len(self._toc_items) - skip_count
+        lines.append(f"  正文章节: {content_count} | 跳过章节: {skip_count}")
+        lines.append("")
+        return "\n".join(lines)

src/translator.py

@@ -0,0 +1,304 @@
+"""
+EPUB Translator Core Module - v0.09 (TOC Selection Support)
+"""
+
+import asyncio
+import traceback
+from typing import List, Dict, Any
+from pathlib import Path
+from loguru import logger
+from rich.console import Console
+from rich.progress import Progress, SpinnerColumn, TextColumn, BarColumn, TimeElapsedColumn
+
+from .epub_parser import EPUBParser
+from .toc_parser import TOCParser
+from .llm_client import LLMClient
+from .text_processor import TextProcessor
+from .bilingual_builder import BilingualEPUBBuilder
+from .chinese_builder import ChineseEPUBBuilder
+from .manifest_manager import ManifestManager
+from .book_profiler import BookProfiler
+from .cache import TranslationCache
+from .format_restorer import FormatRestorer
+from .utils import add_spacing_between_cn_and_en_num
+
+
+class EPUBTranslator:
+    
+    def __init__(self, config: Dict, use_cache: bool = True):
+        self.config = config
+        self.console = Console()
+        self.use_cache = use_cache
+        
+        self.parser = None
+        self.llm_client = LLMClient(config)
+        self.text_processor = TextProcessor(config)
+        self.profiler = BookProfiler(config, self.llm_client)
+        self.cache = TranslationCache(config) if use_cache else None
+        self.restorer = FormatRestorer()
+        
+        self.manifest_dir = Path("cache/manifests")
+        self.manifest_dir.mkdir(parents=True, exist_ok=True)
+
+    async def translate_epub(self, epub_path: str, test_mode: bool = False, 
+                             output_dir: str = None, mode: str = "bilingual",
+                             from_chapter: str = None, to_chapter: str = None) -> str:
+        """
+        翻译 EPUB 文件
+        
+        Args:
+            epub_path: EPUB 文件路径
+            test_mode: 测试模式（只翻译前几块）
+            output_dir: 输出目录
+            mode: 翻译模式 - "bilingual" (双语) 或 "chinese" (纯中文)
+            from_chapter: 起始章节标题
+            to_chapter: 结束章节标题
+        """
+        try:
+            epub_path = Path(epub_path)
+            self.parser = EPUBParser(str(epub_path))
+            
+            # 0. 解析 TOC 并处理章节范围
+            toc_parser = TOCParser(self.parser.book)
+            include_files = None
+            chapter_range_info = None
+            
+            if from_chapter or to_chapter:
+                # 用户手动指定了章节范围 - 使用 Spine 范围
+                include_files, selected_items = toc_parser.get_spine_range(
+                    start_title=from_chapter,
+                    end_title=to_chapter
+                )
+                if selected_items:
+                    start_title = selected_items[0].title
+                    end_title = selected_items[-1].title
+                    self.console.print(
+                        f"[cyan]📚 选择翻译范围: {start_title} ~ {end_title}[/cyan]"
+                    )
+                    self.console.print(
+                        f"[cyan]   包含 {len(include_files)} 个 HTML 文件 (基于 Spine)[/cyan]"
+                    )
+                    chapter_range_info = {
+                        "start_title": start_title,
+                        "end_title": end_title,
+                        "included_files": list(include_files)
+                    }
+            else:
+                # 未指定范围时，自动跳过前置/后置部分 - 使用 Spine 范围
+                skip_files = toc_parser.get_skip_files()
+                if skip_files:
+                    # 使用基于 Spine 的正文文件获取
+                    include_files = toc_parser.get_content_files_from_spine()
+                    skip_count = len(skip_files)
+                    content_count = len(include_files)
+                    self.console.print(
+                        f"[cyan]📚 智能跳过: {skip_count} 个非正文章节 (Cover, Copyright, Index 等)[/cyan]"
+                    )
+                    self.console.print(
+                        f"[cyan]   翻译正文: {content_count} 个 HTML 文件 (基于 Spine)[/cyan]"
+                    )
+            
+            # 1. Manifest - 根据 mode 使用不同的 manifest 文件
+            manifest_suffix = "_chinese" if mode == "chinese" else ""
+            manifest_path = self.manifest_dir / f"{epub_path.stem}{manifest_suffix}_manifest.json"
+            manifest = ManifestManager(str(manifest_path))
+            
+            if not manifest.load() or not self.use_cache:
+                self.console.print(f"[yellow]Initializing Manifest (Mode: {mode})...[/yellow]")
+                manifest.init_manifest(
+                    book_id=epub_path.name, 
+                    metadata=self.parser.get_book_info(),
+                    chapter_range=chapter_range_info
+                )
+                # 传递文件过滤参数
+                content_items = self.parser.extract_all_content_items(include_files=include_files)
+                for item in content_items:
+                    # 传递 mode 参数
+                    self.text_processor.extract_to_manifest(
+                        item['content'], item['file_name'], manifest, mode=mode
+                    )
+                manifest.save()
+            else:
+                # 加载已有 Manifest，检查章节范围是否一致
+                saved_range = manifest.get_chapter_range()
+                if saved_range and saved_range.get("start_title"):
+                    self.console.print(
+                        f"[cyan]📚 翻译范围: {saved_range.get('start_title')} ~ {saved_range.get('end_title')}[/cyan]"
+                    )
+            
+            stats = manifest.stats
+            self.console.print(f"[green]Manifest loaded: {stats['total']} paragraphs[/green]")
+            if stats['pending'] < stats['total'] and stats['translated'] > 0:
+                self.console.print(
+                    f"[yellow]Detected incomplete translation task, completed {stats['translated']}/{stats['total']}, "
+                    f"continuing translation of remaining {stats['pending']} paragraphs...[/yellow]"
+                )
+
+            # 2. Profile (Glossary)
+            profile = {}
+            if not test_mode:
+                self.console.print("[yellow]Generating Book Profile...[/yellow]")
+                profile = await self.profiler.analyze_book(manifest)
+                self.console.print(f"Genre: {profile.get('genre')} | Style: {profile.get('style')}")
+
+            # 3. Translate - 传递 mode 参数
+            chunks = self.text_processor.create_chunks_from_manifest(manifest, mode=mode)
+            
+            if test_mode:
+                self.console.print("[yellow]Test mode enabled: Translating only first 10 chunks...[/yellow]")
+                chunks = chunks[:10]
+
+            if chunks:
+                await self._translate_concurrently(chunks, manifest, profile, mode=mode)
+            
+            # 4. Build - 根据 mode 选择正确的 Builder
+            self.console.print(f"\n[yellow]Building {mode} EPUB...[/yellow]")
+            output_path = output_dir or self.config['output']['output_dir']
+            
+            if mode == "chinese":
+                builder = ChineseEPUBBuilder(self.parser.book, self.config)
+                result_file = builder.create_chinese_epub_with_mapping(
+                    manifest.get_items(), output_path
+                )
+            else:
+                builder = BilingualEPUBBuilder(self.parser.book, self.config)
+                translation_map = {item.global_id: item.translation for item in manifest.get_items() if item.translation}
+                paragraph_map = {item.global_id: {
+                    "file_name": item.source_file,
+                    "text": item.clean_text,
+                    "html_element": item.original_html,
+                    "tag_attrs": item.tag_attrs
+                } for item in manifest.get_items()}
+                
+                result_file = builder.create_bilingual_epub_with_mapping(
+                    translation_map, paragraph_map, output_path
+                )
+            
+            final_stats = manifest.stats
+            self.console.print(f"""
+[green]✅ Translation complete![/green]
+  - Mode: {mode}
+  - Total Paragraphs: {final_stats['total']}
+  - Successfully Translated: {final_stats['translated']}
+  - Skipped: {final_stats['ignored']}
+  - Failed: {final_stats['failed']}
+  - Output File: {result_file}
+""")
+            return result_file
+        except Exception as e:
+            traceback.print_exc()
+            logger.error(f"Translation flow failed: {e}")
+            raise
+
+    async def _translate_concurrently(self, chunks: List[List[Any]], manifest: ManifestManager, 
+                                      profile: Dict, mode: str = "bilingual"):
+        total_chunks = len(chunks)
+        glossary = profile.get('glossary', {})
+        instruction = profile.get('translation_instruction', "")
+        
+        with Progress(
+            SpinnerColumn(),
+            TextColumn("[progress.description]{task.description}"),
+            BarColumn(),
+            TextColumn("[progress.percentage]{task.percentage:>3.0f}%"),
+            TimeElapsedColumn(),
+            console=self.console
+        ) as progress:
+            task_id = progress.add_task(f"[cyan]Translating ({mode})...", total=total_chunks)
+            
+            async def worker(chunk, idx):
+                try:
+                    model_name = self.llm_client.models.get('fast')
+                    chunk_dicts = [item.to_dict() for item in chunk]
+                    results = None
+
+                    if self.cache:
+                        results = self.cache.get_chunk_translation(chunk_dicts, model=model_name)
+
+                    if not results:
+                        # 传递 mode 参数给 LLM
+                        results = await self.llm_client.translate_chunk(
+                            chunk, 
+                            glossary=glossary, 
+                            instruction=instruction,
+                            mode=mode
+                        )
+                        if self.cache and results:
+                            self.cache.save_chunk_translation(chunk_dicts, results, model=model_name)
+
+                    for item in chunk:
+                        if item.global_id in results:
+                            raw_translation = results[item.global_id]
+                            
+                            # 错误检测：如果翻译结果包含错误标记，视为失败
+                            if raw_translation.startswith("[Error") or "Error -" in raw_translation:
+                                logger.warning(f"Translation error for {item.global_id}: {raw_translation}")
+                                manifest.update_item(item.global_id, None, status="failed", error=raw_translation)
+                                continue
+                            
+                            # 格式化翻译文本（盘古之白）
+                            processed_translation = add_spacing_between_cn_and_en_num(raw_translation)
+                            
+                            if mode == "chinese":
+                                # 检查是否有内嵌占位符（排除 _prefix, _suffix）
+                                inner_placeholders = {k: v for k, v in item.placeholder_map.items() 
+                                                     if not k.startswith("_")} if item.placeholder_map else {}
+                                
+                                if not inner_placeholders:
+                                    # 没有内嵌占位符，直接使用译文（清除 LLM 可能虚构的占位符）
+                                    clean_translation = self.restorer._strip_placeholders(processed_translation)
+                                    item.translation_with_placeholders = clean_translation
+                                    # 还原时只添加前缀后缀
+                                    restored_html, success = self.restorer.restore(
+                                        clean_translation, 
+                                        item.placeholder_map
+                                    )
+                                else:
+                                    # 有内嵌占位符，正常还原
+                                    item.translation_with_placeholders = processed_translation
+                                    restored_html, success = self.restorer.restore(
+                                        processed_translation, 
+                                        item.placeholder_map
+                                    )
+                                    
+                                    # 格式修复逻辑
+                                    if not success:
+                                        logger.warning(f"格式丢失 (ID: {item.global_id})，尝试自动修复...")
+                                        try:
+                                            fixed_translation = await self.llm_client.repair_format(
+                                                item.text_with_placeholders, 
+                                                processed_translation
+                                            )
+                                            restored_html_2, success_2 = self.restorer.restore(
+                                                fixed_translation,
+                                                item.placeholder_map
+                                            )
+                                            
+                                            if success_2:
+                                                logger.info(f"格式修复成功! (ID: {item.global_id})")
+                                                restored_html = restored_html_2
+                                                item.translation_with_placeholders = fixed_translation
+                                            else:
+                                                logger.error(f"格式修复失败 (ID: {item.global_id})，保留原始译文")
+                                        except Exception as e:
+                                            logger.error(f"修复过程出错: {e}")
+
+                                item.translation_with_original_html = restored_html
+                                # translation 字段存储纯文本
+                                item.translation = self.restorer._strip_placeholders(item.translation_with_placeholders)
+                                manifest.update_item(item.global_id, item.translation) 
+                            else:
+
+                                # 双语模式
+                                item.translation = processed_translation
+                                manifest.update_item(item.global_id, item.translation)
+                        else:
+                            manifest.update_item(item.global_id, None, status="failed", error="Missing")
+                    manifest.save()
+                except Exception as e:
+                    logger.error(f"Chunk {idx} failed: {e}")
+                finally:
+                    progress.update(task_id, advance=1)
+
+            tasks = [worker(chunk, i) for i, chunk in enumerate(chunks)]
+            await asyncio.gather(*tasks)

src/utils.py

@@ -0,0 +1,208 @@
+"""
+工具函数模块
+提供配置加载、日志设置等通用功能
+"""
+
+import json
+import os
+from pathlib import Path
+from typing import Dict, Any
+from loguru import logger
+import sys
+from dotenv import load_dotenv
+
+
+def load_config(config_path: str = "config/config.json") -> Dict[str, Any]:
+    """
+    加载配置文件
+    
+    Args:
+        config_path: 配置文件路径
+        
+    Returns:
+        配置字典
+    """
+    # 加载 .env 文件
+    load_dotenv()
+
+    try:
+        with open(config_path, 'r', encoding='utf-8') as f:
+            config = json.load(f)
+        
+        # 从环境变量获取 API Key
+        for provider_name, provider_config in config.get('providers', {}).items():
+            env_key = f"{provider_name.upper()}_API_KEY"
+            if env_key in os.environ:
+                provider_config['api_key'] = os.environ[env_key]
+        
+        return config
+    except FileNotFoundError:
+        raise FileNotFoundError(f"配置文件未找到: {config_path}")
+    except json.JSONDecodeError as e:
+        raise ValueError(f"配置文件格式错误: {e}")
+
+
+def load_prompts(prompts_path: str = "config/prompts.json") -> Dict[str, str]:
+    """
+    加载提示词模板
+    
+    Args:
+        prompts_path: 提示词文件路径
+        
+    Returns:
+        提示词字典
+    """
+    try:
+        with open(prompts_path, 'r', encoding='utf-8') as f:
+            return json.load(f)
+    except FileNotFoundError:
+        raise FileNotFoundError(f"提示词文件未找到: {prompts_path}")
+
+
+def setup_logging(config: Dict[str, Any]) -> None:
+    """
+    设置日志配置
+    
+    Args:
+        config: 配置字典
+    """
+    log_config = config.get('logging', {})
+    
+    # 移除默认处理器
+    logger.remove()
+    
+    # 添加控制台输出
+    logger.add(
+        sys.stdout,
+        level=log_config.get('level', 'INFO'),
+        format="<green>{time:YYYY-MM-DD HH:mm:ss}</green> | <level>{level: <8}</level> | <cyan>{name}</cyan>:<cyan>{function}</cyan>:<cyan>{line}</cyan> - <level>{message}</level>"
+    )
+    
+    # 添加文件输出
+    if 'file' in log_config:
+        log_file = log_config['file']
+        # 确保日志目录存在
+        Path(log_file).parent.mkdir(parents=True, exist_ok=True)
+        
+        logger.add(
+            log_file,
+            level=log_config.get('level', 'INFO'),
+            rotation=log_config.get('rotation', '10 MB'),
+            retention=log_config.get('retention', '7 days'),
+            encoding='utf-8',
+            format="{time:YYYY-MM-DD HH:mm:ss} | {level: <8} | {name}:{function}:{line} - {message}"
+        )
+
+
+def ensure_output_dir(output_dir: str) -> Path:
+    """
+    确保输出目录存在
+    
+    Args:
+        output_dir: 输出目录路径
+        
+    Returns:
+        输出目录的 Path 对象
+    """
+    output_path = Path(output_dir)
+    output_path.mkdir(parents=True, exist_ok=True)
+    return output_path
+
+
+def sanitize_filename(filename: str) -> str:
+    """
+    清理文件名，移除非法字符
+    
+    Args:
+        filename: 原始文件名
+        
+    Returns:
+        清理后的文件名
+    """
+    import re
+    # 移除或替换非法字符
+    filename = re.sub(r'[<>:"/\\|?*]', '_', filename)
+    # 移除多余的空格和点
+    filename = re.sub(r'\s+', ' ', filename).strip('. ')
+    return filename
+
+
+def format_file_size(size_bytes: int) -> str:
+    """
+    格式化文件大小显示
+    
+    Args:
+        size_bytes: 字节数
+        
+    Returns:
+        格式化的大小字符串
+    """
+    if size_bytes == 0:
+        return "0B"
+    
+    size_names = ["B", "KB", "MB", "GB"]
+    import math
+    i = int(math.floor(math.log(size_bytes, 1024)))
+    p = math.pow(1024, i)
+    s = round(size_bytes / p, 2)
+    return f"{s} {size_names[i]}"
+
+
+def estimate_tokens(text: str) -> int:
+    """
+    估算文本的 token 数量
+    
+    Args:
+        text: 输入文本
+        
+    Returns:
+        估算的 token 数量
+    """
+    # 简单估算：英文约 4 字符/token，中文约 1.5 字符/token
+    import re
+    
+    # 分离中英文
+    chinese_chars = len(re.findall(r'[\u4e00-\u9fff]', text))
+    other_chars = len(text) - chinese_chars
+    
+    # 估算 tokens
+    estimated_tokens = chinese_chars / 1.5 + other_chars / 4
+    return int(estimated_tokens)
+
+
+def truncate_text(text: str, max_length: int = 100) -> str:
+    """
+    截断文本用于显示
+    
+    Args:
+        text: 原始文本
+        max_length: 最大长度
+        
+    Returns:
+        截断后的文本
+    """
+    if len(text) <= max_length:
+        return text
+    return text[:max_length-3] + "..."
+
+
+def add_spacing_between_cn_and_en_num(text: str) -> str:
+    """
+    在中文和英文/数字之间添加空格（盘古之白）
+    
+    Args:
+        text: 原始文本
+        
+    Returns:
+        处理后的文本
+    """
+    import re
+    if not text:
+        return text
+        
+    # 中文-英文/数字
+    text = re.sub(r'([\u4e00-\u9fff])([a-zA-Z0-9])', r'\1 \2', text)
+    # 英文/数字-中文
+    text = re.sub(r'([a-zA-Z0-9])([\u4e00-\u9fff])', r'\1 \2', text)
+    
+    return text