fix/various fixes

api/app/features/memoir/models.py

@@ -36,15 +36,12 @@ class Chapter(Base):
     is_new = Column(Boolean, default=True)
     is_active = Column(Boolean, default=True)
     source_segments = Column(JSON, nullable=True)
+    # story-backed 章节：story 变更后标 True，由 Celery 重组 canonical_markdown
+    markdown_compose_dirty = Column(Boolean, default=False, nullable=False)
+    markdown_composed_at = Column(DateTime(timezone=True), nullable=True)
 
     user = relationship("User", back_populates="chapters")
     book = relationship("Book", back_populates="chapters")
-    sections = relationship(
-        "ChapterSection",
-        back_populates="chapter",
-        order_by="ChapterSection.order_index",
-        cascade="all, delete-orphan",
-    )
     images = relationship(
         "MemoirImage",
         back_populates="chapter",
@@ -74,31 +71,6 @@ class Chapter(Base):
     )
 
 
-class ChapterSection(Base):
-    __tablename__ = "chapter_sections"
-
-    id = Column(String, primary_key=True)
-    chapter_id = Column(
-        String, ForeignKey("chapters.id", ondelete="CASCADE"), nullable=False
-    )
-    order_index = Column(Integer, nullable=False)
-    content = Column(Text, nullable=False)
-    image_id = Column(
-        String, ForeignKey("memoir_images.id", ondelete="SET NULL"), nullable=True
-    )
-    updated_at = Column(DateTime(timezone=True), default=utc_now, onupdate=utc_now)
-
-    chapter = relationship("Chapter", back_populates="sections")
-    image_record = relationship(
-        "MemoirImage",
-        back_populates="section",
-        uselist=False,
-        foreign_keys="ChapterSection.image_id",
-        cascade="all, delete-orphan",
-        single_parent=True,
-    )
-
-
 class MemoirImage(Base):
     __tablename__ = "memoir_images"
 
@@ -106,9 +78,6 @@ class MemoirImage(Base):
     chapter_id = Column(
         String, ForeignKey("chapters.id", ondelete="CASCADE"), nullable=False
     )
-    section_id = Column(
-        String, ForeignKey("chapter_sections.id", ondelete="CASCADE"), nullable=True
-    )
     order_index = Column(Integer, nullable=False, default=0)
     placeholder = Column(Text, nullable=True)
     description = Column(Text, nullable=True)
@@ -125,11 +94,6 @@ class MemoirImage(Base):
     updated_at = Column(DateTime(timezone=True), default=utc_now, onupdate=utc_now)
 
     chapter = relationship("Chapter", back_populates="images")
-    section = relationship(
-        "ChapterSection",
-        back_populates="image_record",
-        foreign_keys="ChapterSection.image_id",
-    )
 
 
 class ChapterVersion(Base):