feat: 移除PDI和订单号字段，新增设备巡检模块

- 从物料跟踪页面移除订单号列和表单字段
- 从导航菜单移除PDI管理，添加设备巡检
- 新增InspectionLocation和InspectionRecord后端模型和API
- 新增设备巡检前端页面（左侧点位列表，右侧设备和历史记录）

backend/app/services/auth_service.py

@@ -0,0 +1,70 @@
+from datetime import datetime, timedelta
+from typing import Optional
+from jose import JWTError, jwt
+from passlib.context import CryptContext
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy import select
+from fastapi import Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordBearer
+
+from app.config import settings
+from app.models.user import User
+from app.database import get_db
+
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/api/auth/login")
+
+
+def verify_password(plain: str, hashed: str) -> bool:
+    return pwd_context.verify(plain, hashed)
+
+
+def hash_password(password: str) -> str:
+    return pwd_context.hash(password)
+
+
+def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
+    to_encode = data.copy()
+    expire = datetime.utcnow() + (expires_delta or timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES))
+    to_encode["exp"] = expire
+    return jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)
+
+
+async def authenticate_user(db: AsyncSession, username: str, password: str) -> Optional[User]:
+    result = await db.execute(select(User).where(User.username == username))
+    user = result.scalar_one_or_none()
+    if not user or not verify_password(password, user.hashed_password):
+        return None
+    return user
+
+
+async def get_current_user(
+    token: str = Depends(oauth2_scheme),
+    db: AsyncSession = Depends(get_db)
+) -> User:
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="无效的认证凭据",
+        headers={"WWW-Authenticate": "Bearer"},
+    )
+    try:
+        payload = jwt.decode(token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM])
+        username: str = payload.get("sub")
+        if not username:
+            raise credentials_exception
+    except JWTError:
+        raise credentials_exception
+
+    result = await db.execute(select(User).where(User.username == username))
+    user = result.scalar_one_or_none()
+    if not user or not user.is_active:
+        raise credentials_exception
+    return user
+
+
+def require_roles(*roles: str):
+    async def checker(current_user: User = Depends(get_current_user)):
+        if current_user.role not in roles:
+            raise HTTPException(status_code=403, detail="权限不足")
+        return current_user
+    return checker