新增前后端AI聊天模块，包括流式对话、配置管理和UI组件优化。

backend/app/routers/outlines.py

@@ -0,0 +1,137 @@
+from datetime import datetime, timezone
+
+from fastapi import APIRouter, Depends, HTTPException, Query
+from sqlmodel import Session, select, func
+
+from ..database import get_session
+from ..models import Novel, Outline
+from ..schemas import (
+    OutlineCreate,
+    OutlineUpdate,
+    OutlineRead,
+    OutlineList,
+    OutlineReorder,
+)
+
+router = APIRouter(prefix="/api/novels/{novel_id}/outlines", tags=["outlines"])
+
+
+def _get_novel_or_404(novel_id: int, session: Session) -> Novel:
+    novel = session.get(Novel, novel_id)
+    if not novel:
+        raise HTTPException(status_code=404, detail="小说不存在")
+    return novel
+
+
+def _get_outline_or_404(
+    outline_id: int, novel_id: int, session: Session
+) -> Outline:
+    outline = session.get(Outline, outline_id)
+    if not outline or outline.novel_id != novel_id:
+        raise HTTPException(status_code=404, detail="大纲不存在")
+    return outline
+
+
+@router.get("", response_model=OutlineList)
+def list_outlines(
+    novel_id: int,
+    session: Session = Depends(get_session),
+):
+    _get_novel_or_404(novel_id, session)
+    total = session.exec(
+        select(func.count(Outline.id)).where(Outline.novel_id == novel_id)
+    ).one()
+    items = session.exec(
+        select(Outline)
+        .where(Outline.novel_id == novel_id)
+        .order_by(Outline.sort_order)
+    ).all()
+    return OutlineList(
+        items=[OutlineRead.model_validate(o, from_attributes=True) for o in items],
+        total=total,
+    )
+
+
+@router.post("", response_model=OutlineRead, status_code=201)
+def create_outline(
+    novel_id: int,
+    data: OutlineCreate,
+    session: Session = Depends(get_session),
+):
+    _get_novel_or_404(novel_id, session)
+    # 自动设置 sort_order 为当前最大值 + 1
+    max_order = session.exec(
+        select(func.max(Outline.sort_order)).where(Outline.novel_id == novel_id)
+    ).one()
+    next_order = (max_order or 0) + 1
+
+    outline = Outline(novel_id=novel_id, sort_order=next_order, **data.model_dump())
+    session.add(outline)
+    session.commit()
+    session.refresh(outline)
+    return outline
+
+
+@router.put("/reorder", response_model=OutlineList)
+def reorder_outlines(
+    novel_id: int,
+    data: OutlineReorder,
+    session: Session = Depends(get_session),
+):
+    _get_novel_or_404(novel_id, session)
+    now = datetime.now(timezone.utc)
+    for idx, oid in enumerate(data.ordered_ids):
+        outline = _get_outline_or_404(oid, novel_id, session)
+        outline.sort_order = idx + 1
+        outline.updated_at = now
+        session.add(outline)
+    session.commit()
+
+    items = session.exec(
+        select(Outline)
+        .where(Outline.novel_id == novel_id)
+        .order_by(Outline.sort_order)
+    ).all()
+    total = len(items)
+    return OutlineList(
+        items=[OutlineRead.model_validate(o, from_attributes=True) for o in items],
+        total=total,
+    )
+
+
+@router.get("/{outline_id}", response_model=OutlineRead)
+def get_outline(
+    novel_id: int,
+    outline_id: int,
+    session: Session = Depends(get_session),
+):
+    return _get_outline_or_404(outline_id, novel_id, session)
+
+
+@router.patch("/{outline_id}", response_model=OutlineRead)
+def update_outline(
+    novel_id: int,
+    outline_id: int,
+    data: OutlineUpdate,
+    session: Session = Depends(get_session),
+):
+    outline = _get_outline_or_404(outline_id, novel_id, session)
+    update_data = data.model_dump(exclude_unset=True)
+    for key, value in update_data.items():
+        setattr(outline, key, value)
+    outline.updated_at = datetime.now(timezone.utc)
+    session.add(outline)
+    session.commit()
+    session.refresh(outline)
+    return outline
+
+
+@router.delete("/{outline_id}", status_code=204)
+def delete_outline(
+    novel_id: int,
+    outline_id: int,
+    session: Session = Depends(get_session),
+):
+    outline = _get_outline_or_404(outline_id, novel_id, session)
+    session.delete(outline)
+    session.commit()