update pay function

app.py

@@ -13591,6 +13591,15 @@ def get_prediction_topics():
             total_shares = topic.yes_total_shares + topic.no_total_shares
             yes_prob = (topic.yes_total_shares / total_shares * 100) if total_shares > 0 else 50.0
 
+            # 处理datetime，确保移除时区信息
+            deadline = topic.deadline
+            if hasattr(deadline, 'replace') and deadline.tzinfo is not None:
+                deadline = deadline.replace(tzinfo=None)
+
+            created_at = topic.created_at
+            if hasattr(created_at, 'replace') and created_at.tzinfo is not None:
+                created_at = created_at.replace(tzinfo=None)
+
             topics_data.append({
                 'id': topic.id,
                 'title': topic.title,
@@ -13613,8 +13622,8 @@ def get_prediction_topics():
                     'nickname': topic.no_lord.nickname or topic.no_lord.username,
                     'avatar_url': topic.no_lord.avatar_url
                 } if topic.no_lord else None,
-                'deadline': topic.deadline.isoformat(),
-                'created_at': topic.created_at.isoformat(),
+                'deadline': deadline.isoformat() if deadline else None,
+                'created_at': created_at.isoformat() if created_at else None,
                 'views_count': topic.views_count,
                 'comments_count': topic.comments_count,
                 'participants_count': topic.participants_count,