better：优化统计和心流提示词

src/plugins/chat/prompt_builder.py

@@ -83,7 +83,7 @@ class PromptBuilder:
             text=message_txt,
             max_memory_num=3,
             max_memory_length=2,
-            max_depth=3,
+            max_depth=4,
             fast_retrieval=False
         )
         memory_str = ""

src/plugins/memory_system/Hippocampus.py

@@ -1046,14 +1046,14 @@ class Hippocampus:
             # 将选中的节点添加到remember_map
             for node, normalized_activation in sorted_nodes:
                 remember_map[node] = activate_map[node]  # 使用原始激活值
-                logger.info(
+                logger.debug(
                     f"节点 '{node}' (归一化激活值: {normalized_activation:.2f}, 激活值: {activate_map[node]:.2f})")
         else:
             logger.info("没有有效的激活值")
 
         # 从选中的节点中提取记忆
         all_memories = []
-        logger.info("开始从选中的节点中提取记忆:")
+        # logger.info("开始从选中的节点中提取记忆:")
         for node, activation in remember_map.items():
             logger.debug(f"处理节点 '{node}' (激活值: {activation:.2f}):")
             node_data = self.memory_graph.G.nodes[node]

src/plugins/utils/statistic.py

@@ -44,13 +44,19 @@ class LLMStatistics:
 
     def _record_online_time(self):
         """记录在线时间"""
-        try:
+        current_time = datetime.now()
+        # 检查5分钟内是否已有记录
+        recent_record = db.online_time.find_one({
+            "timestamp": {
+                "$gte": current_time - timedelta(minutes=5)
+            }
+        })
+        
+        if not recent_record:
             db.online_time.insert_one({
-                "timestamp": datetime.now(),
+                "timestamp": current_time,
                 "duration": 5  # 5分钟
             })
-        except Exception:
-            logger.exception("记录在线时间失败")
 
     def _collect_statistics_for_period(self, start_time: datetime) -> Dict[str, Any]:
         """收集指定时间段的LLM请求统计数据