audio_codebuddy/server/diff.txt

diff --git a/server/src/modules/book-generator/langgraph-generator.ts b/server/src/modules/book-generator/langgraph-generator.ts
index 3f502c6..5128bdc 100644
--- a/server/src/modules/book-generator/langgraph-generator.ts
+++ b/server/src/modules/book-generator/langgraph-generator.ts
@@ -335,7 +335,25 @@ async function writeChaptersNode(state: typeof GraphState.State): Promise<Partia
   let currentWordCount = await getGeneratedWordCount(state.bookId);
   console.log(`[LangGraph] 当前已生成字数: ${currentWordCount}`);
 
+  // 查询已完成的章节，支持断点续传
+  const completedChapterNumbers = new Set<number>();
+  for (const ch of book.outline.chapters) {
+    const chapter = await bookStore.getChapter(state.bookId, ch.number);
+    if (chapter && chapter.status === 'completed') {
+      completedChapterNumbers.add(ch.number);
+    }
+  }
+  
+  if (completedChapterNumbers.size > 0) {
+    console.log(`[LangGraph] ✅ 跳过 ${completedChapterNumbers.size} 个已完成的章节: [${Array.from(completedChapterNumbers).join(', ')}]`);
+  }
+
   for (const chapterOutline of book.outline.chapters) {
+    // 跳过已完成的章节
+    if (completedChapterNumbers.has(chapterOutline.number)) {
+      console.log(`[LangGraph] 跳过第${chapterOutline.number}章（已完成）`);
+      continue;
+    }
     // ===== 额度监控：在生成章节前检查额度 =====
     console.log(`[LangGraph] 检查第${chapterOutline.number}章额度，当前累计: ${currentWordCount}字`);
     try {