fix: episodes GET 接口放开给三角色，POST/PATCH/DELETE 保持仅 zhipianren/zebian

backend/app/api/episodes.py

@@ -14,14 +14,19 @@ from app.schemas.episode import EpisodeCreate, EpisodeResponse, EpisodeUpdate
 router = APIRouter(prefix="/api/episodes", tags=["节目期次"])
 
 
+def require_read_role():
+    """GET 接口的鉴权：三个角色都可读"""
+    return require_role(UserRole.zhipianren, UserRole.zebian, UserRole.biandao)
+
+
 @router.get("", response_model=list[EpisodeResponse])
 def list_episodes(
     limit: int = 50,
     offset: int = 0,
     session: Session = Depends(get_session),
-    current_user: User = Depends(require_role(UserRole.zhipianren, UserRole.zebian)),
+    current_user: User = Depends(require_read_role()),
 ):
-    """获取节目期次列表（仅管理员/责编）。按播出日期倒序。"""
+    """获取节目期次列表（三角色都可读）。按播出日期倒序。"""
     statement = select(Episode).order_by(Episode.air_date.desc()).offset(offset).limit(limit)
     episodes = session.exec(statement).all()
     return episodes
@@ -31,9 +36,9 @@ def list_episodes(
 def get_episode(
     episode_id: int,
     session: Session = Depends(get_session),
-    current_user: User = Depends(require_role(UserRole.zhipianren, UserRole.zebian)),
+    current_user: User = Depends(require_read_role()),
 ):
-    """根据 ID 获取单期节目（仅管理员/责编）。"""
+    """根据 ID 获取单期节目（三角色都可读）。"""
     episode = session.get(Episode, episode_id)
     if episode is None:
         raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="期次不存在")