新增空闲锁屏、修复401等问题，新增文件版本管理、共享库等占位符

backend/app/core/config.py

@@ -12,6 +12,8 @@ class Settings(BaseSettings):
     ENV: Literal["development", "production", "test"] = "development"
     JWT_SECRET_KEY: str = "dev-secret"
     JWT_EXPIRE_MINUTES: int = 60
+    JWT_EXTEND_GRACE_SECONDS: int = 120
+    ABSOLUTE_SESSION_MAX_HOURS: int = 8
 
 
 @lru_cache

backend/app/core/deps.py

@@ -33,12 +33,17 @@ async def get_current_user(
         ) from exc
 
     user = await user_crud.get_by_id(db, uuid.UUID(str(token_data.sub)))
-    if not user or not user.is_active:
+    if not user:
         raise HTTPException(
             status_code=status.HTTP_401_UNAUTHORIZED,
-            detail="账号不存在或已停用",
+            detail="账号不存在",
             headers={"WWW-Authenticate": "Bearer"},
         )
+    if not user.is_active:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="账号已停用",
+        )
     return user
 
 

backend/app/core/security.py

@@ -14,11 +14,23 @@ pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
 oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/api/v1/auth/login", scheme_name="Bearer")
 
 
-def create_access_token(*, user_id: str, role: str, expires_minutes: Optional[int] = None) -> str:
-    expire = datetime.now(timezone.utc) + timedelta(
-        minutes=expires_minutes or settings.JWT_EXPIRE_MINUTES
-    )
-    to_encode: Dict[str, Any] = {"sub": user_id, "role": role, "exp": expire}
+def create_access_token(
+    *,
+    user_id: str,
+    role: str,
+    expires_minutes: Optional[int] = None,
+    session_start: Optional[datetime] = None,
+) -> str:
+    now = datetime.now(timezone.utc)
+    expire = now + timedelta(minutes=expires_minutes or settings.JWT_EXPIRE_MINUTES)
+    session_start_time = session_start or now
+    to_encode: Dict[str, Any] = {
+        "sub": user_id,
+        "role": role,
+        "exp": expire,
+        "iat": int(now.timestamp()),
+        "orig_iat": int(session_start_time.timestamp()),
+    }
     return jwt.encode(to_encode, settings.JWT_SECRET_KEY, algorithm=ALGORITHM)
 
 
@@ -34,6 +46,23 @@ def decode_token(token: str) -> Dict[str, Any]:
     return payload
 
 
+def decode_token_allow_expired(token: str) -> Dict[str, Any]:
+    try:
+        payload = jwt.decode(
+            token,
+            settings.JWT_SECRET_KEY,
+            algorithms=[ALGORITHM],
+            options={"verify_exp": False},
+        )
+    except JWTError as exc:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="无法验证登录凭据",
+            headers={"WWW-Authenticate": "Bearer"},
+        ) from exc
+    return payload
+
+
 def hash_password(plain_password: str) -> str:
     return pwd_context.hash(plain_password)