update

backend/app/api/endpoints/preferences.py

@@ -120,6 +120,7 @@ def recommend_events(
     hours: int = Query(72, ge=1, le=24 * 30, description="仅匹配最近多少小时的事件"),
     limit: int = Query(20, ge=1, le=50, description="最多返回多少条推荐"),
     semantic_threshold: float = Query(0.78, ge=0.0, le=1.0, description="语义匹配相似度阈值"),
+    sort_by: str = Query("match_score", description="排序方式: match_score | created_at"),
     db: Session = Depends(get_db),
     current_user: AppUser = Depends(get_current_user),
 ):
@@ -135,6 +136,9 @@ def recommend_events(
         semantic_threshold=semantic_threshold,
     )
 
+    if sort_by == "created_at":
+        matched.sort(key=lambda x: x.event.created_at, reverse=True)
+
     result_data: list[MatchedEventResponse] = []
     for item in matched:
         result_data.append(