把“章节正文 + 图片”从 chapters 单表/JSON 结构，重构为“章节 chapter + 段落 section + 图片 memoir_images 独立表”的新数据模型，同时联动修改接口、PDF 导出、异步任务、迁移脚本、测试，以及修复 Android 端聊天列表显示问题。 (#9)

* refactor: 表结构重构，新增段落section和图片image新表

* fix: fix android app import error

* refactor: 重构文件名

* fix: 优化提示词

* fix: 消息气泡显示位置异常问题

---------

Co-authored-by: yangshilin <2157598560@qq.com>

api/scripts/reprocess_user_memoir.py

@@ -47,7 +47,7 @@ import signal
 from sqlalchemy import create_engine, select
 from sqlalchemy.orm import sessionmaker, Session
 
-from database.models import Base, User, Conversation, Segment, Chapter, Book, MemoirState
+from database.models import Base, User, Conversation, Segment, Chapter, ChapterSection, Book, MemoirState
 from services.llm_service import LLMService
 from agents.state_schema import MemoirStateSchema, SlotData, default_state
 from agents.prompts.memory_prompts import (
@@ -57,6 +57,7 @@ from agents.prompts.memory_prompts import (
     inject_image_placeholder_template,
     STAGE_TO_ORDER,
 )
+from services.memoir_images.parser import split_narrative_to_sections
 
 logging.basicConfig(
     level=logging.INFO,
@@ -350,23 +351,35 @@ def cmd_preview(phone: str, batch_size: int, skip_llm_slots: bool):
             nickname = user.nickname
             logger.info(f"用户: {nickname} (id={user_id})")
 
-            # 读取现有 active 章节
+            # 读取现有 active 章节（含 sections，正文从 sections 拼接）
+            from sqlalchemy.orm import joinedload
             old_chapters = (
                 db.execute(
                     select(Chapter)
                     .where(Chapter.user_id == user_id, Chapter.is_active == True)
+                    .options(joinedload(Chapter.sections))
                     .order_by(Chapter.order_index)
                 )
+                .unique()
                 .scalars()
                 .all()
             )
             old_chapter_data = []
             for ch in old_chapters:
+                content = ""
+                if getattr(ch, "sections", None):
+                    content = "\n\n".join(
+                        (s.content or "").strip()
+                        for s in sorted(ch.sections, key=lambda x: x.order_index)
+                        if (s.content or "").strip()
+                    )
+                content_len = len(content)
+                content_preview = (content[:200] + "…") if content_len > 200 else content
                 old_chapter_data.append({
                     "category": ch.category,
                     "title": ch.title,
-                    "content_len": len(ch.content) if ch.content else 0,
-                    "content_preview": (ch.content[:200] + "…") if ch.content and len(ch.content) > 200 else (ch.content or ""),
+                    "content_len": content_len,
+                    "content_preview": content_preview,
                 })
             logger.info(f"现有章节: {len(old_chapters)} 个")
 
@@ -562,7 +575,7 @@ def cmd_apply(phone: str):
                 slots={k: {sk: sv.model_dump() for sk, sv in v.items()} for k, v in ds.slots.items()},
             ))
 
-            # 4. 插入新章节
+            # 4. 插入新章节（无 content/images；正文与配图写入 chapter_sections）
             last_chapter_id = None
             for ch_data in new_chapters:
                 ch_id = str(uuid.uuid4())
@@ -570,15 +583,34 @@ def cmd_apply(phone: str):
                     id=ch_id,
                     user_id=user_id,
                     title=ch_data["title"],
-                    content=ch_data["content"],
                     order_index=ch_data["order_index"],
                     status="completed",
                     category=ch_data["category"],
-                    images=[],
+                    cover_image=None,
                     is_new=True,
                     source_segments=ch_data.get("source_segment_ids", []),
                 )
                 db.add(chapter)
+                db.flush()
+                content = ch_data.get("content") or ""
+                sections = split_narrative_to_sections(content)
+                if not sections:
+                    db.add(ChapterSection(
+                        id=str(uuid.uuid4()).replace("-", "")[:32],
+                        chapter_id=ch_id,
+                        order_index=0,
+                        content=content.strip(),
+                        image=None,
+                    ))
+                else:
+                    for order_idx, seg in enumerate(sections):
+                        db.add(ChapterSection(
+                            id=str(uuid.uuid4()).replace("-", "")[:32],
+                            chapter_id=ch_id,
+                            order_index=order_idx,
+                            content=(seg.get("content") or "").strip(),
+                            image=None,
+                        ))
                 last_chapter_id = ch_id
                 logger.info(f"  新建章节: [{ch_data['category']}] {ch_data['title']} — {ch_data['content_len']} 字")