智教助手平台：完整初始化

- 前端：Vue3 + TS + Element Plus，24 个页面路由（课件/组题/教案/动画/思维导图/作文批改/命题/课堂/资源/社区等）
- 后端：FastAPI + SQLAlchemy + SQLite，17 个路由模块，AI 服务层含降级模板
- AI：glm-5.x 推理模型已禁用思维链，确保输出真实内容
- 修复：ai_service 两处请求体注入 enable_thinking/thinking disabled
- 测试账号：13900999999 / test1234

backend/routers/essay.py

@@ -0,0 +1,83 @@
+from typing import Optional
+from fastapi import APIRouter, Depends, HTTPException, Query
+from sqlalchemy.orm import Session
+from database import get_db
+from models.essay import EssayGrade
+from models.user import User
+from schemas.essay import EssayGradeCreate, EssayGradeOut
+from services.auth import get_current_user
+from services.ai_service import AIService
+from services.credits import spend_credits
+
+router = APIRouter(prefix="/api/essay-grades", tags=["作文批改"])
+ai_service = AIService()
+
+
+@router.post("/", response_model=EssayGradeOut, status_code=201)
+async def create_essay_grade(
+    data: EssayGradeCreate,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db),
+):
+    """Submit an essay for AI grading; the result is persisted automatically."""
+    account = spend_credits(db, current_user, "essay_grade", f"作文批改：{data.title[:40]}")
+    db.commit()
+
+    result = await ai_service.grade_essay(
+        essay_text=data.essay_text, grade_level=data.grade_level,
+        essay_type=data.essay_type, total_score=data.total_score,
+    )
+
+    item = EssayGrade(
+        user_id=current_user.id,
+        title=data.title,
+        essay_text=data.essay_text,
+        grade_level=data.grade_level,
+        essay_type=data.essay_type,
+        total_score=data.total_score,
+        result=result,
+    )
+    db.add(item)
+    db.commit()
+    db.refresh(item)
+    return item
+
+
+@router.get("/", response_model=list[EssayGradeOut])
+def list_essay_grades(
+    keyword: Optional[str] = None,
+    skip: int = Query(0, ge=0),
+    limit: int = Query(20, ge=1, le=100),
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db),
+):
+    query = db.query(EssayGrade).filter(EssayGrade.user_id == current_user.id)
+    if keyword:
+        query = query.filter(EssayGrade.title.contains(keyword))
+    return query.order_by(EssayGrade.updated_at.desc()).offset(skip).limit(limit).all()
+
+
+@router.get("/{grade_id}", response_model=EssayGradeOut)
+def get_essay_grade(
+    grade_id: int,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db),
+):
+    item = db.query(EssayGrade).filter(EssayGrade.id == grade_id, EssayGrade.user_id == current_user.id).first()
+    if not item:
+        raise HTTPException(status_code=404, detail="批改记录不存在")
+    return item
+
+
+@router.delete("/{grade_id}", status_code=204)
+def delete_essay_grade(
+    grade_id: int,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db),
+):
+    item = db.query(EssayGrade).filter(EssayGrade.id == grade_id, EssayGrade.user_id == current_user.id).first()
+    if not item:
+        raise HTTPException(status_code=404, detail="批改记录不存在")
+    db.delete(item)
+    db.commit()
+    return None