Update admin_routes.py

admin_routes.py

@@ -1004,6 +1004,7 @@ def create_token(username: str) -> str:
         token = token.decode()
     
     return token
+    
 # ===================== Cleanup Task =====================
 def cleanup_activity_log():
     """Cleanup old activity log entries"""
@@ -1013,18 +1014,19 @@ def cleanup_activity_log():
             
             # Keep only last 30 days
             cutoff = datetime.now() - timedelta(days=30)
-            cutoff_str = cutoff.isoformat() + "Z"
+            cutoff_str = cutoff.isoformat()
             
             original_count = len(cfg.activity_log)
             cfg.activity_log = [
                 log for log in cfg.activity_log 
-                if log.timestamp >= cutoff_str
+                if hasattr(log, 'timestamp') and str(log.timestamp) >= cutoff_str
             ]
             
             if len(cfg.activity_log) < original_count:
                 removed = original_count - len(cfg.activity_log)
                 log_info(f"🧹 Cleaned up {removed} old activity log entries")
-                cfg.save()
+                # ConfigProvider.save(cfg, "system") kullanmalıyız
+                ConfigProvider.save(cfg, "system")
                 
         except Exception as e:
             log_error("❌ Activity log cleanup error", e)