添加测试、添加总结、全量、rag（todo）3种历史记录保存方式，流式实现

backend/services/chat_service.py

@@ -10,6 +10,8 @@ import logging
 from datetime import datetime
 import uuid
 
+from core.config import settings
+
 logger = logging.getLogger(__name__)
 
 
@@ -453,3 +455,79 @@ class ChatService:
         except Exception as e:
             logger.error(f"更新标签数据失败 {role_name}/{chat_name}: {str(e)}")
             raise
+    
+    def summarize_chat_messages(
+        self,
+        role_name: str,
+        chat_name: str,
+        start_floor: int,
+        end_floor: int,
+        summary_text: str
+    ) -> bool:
+        """
+        总结聊天消息：清空原文，将总结放到最后一个楼层
+        
+        Args:
+            role_name: 角色名称
+            chat_name: 聊天名称
+            start_floor: 总结起始楼层（1-based）
+            end_floor: 总结结束楼层（1-based）
+            summary_text: 总结文本
+            
+        Returns:
+            bool: 是否成功
+        """
+        chat_file = self.chat_dir / role_name / f"{chat_name}.jsonl"
+        
+        if not chat_file.exists():
+            raise FileNotFoundError(f"Chat not found: {role_name}/{chat_name}")
+        
+        try:
+            with open(chat_file, 'r', encoding='utf-8') as f:
+                lines = f.readlines()
+            
+            if not lines:
+                raise ValueError(f"Empty chat file: {role_name}/{chat_name}")
+            
+            # 转换为0-based索引
+            start_idx = start_floor  # header在第0行，所以L1在第1行
+            end_idx = end_floor
+            
+            # 验证范围
+            if start_idx < 1 or end_idx >= len(lines) or start_idx > end_idx:
+                raise ValueError(f"Invalid floor range: {start_floor}-{end_floor}")
+            
+            # 处理消息
+            for i in range(start_idx, end_idx + 1):
+                msg_data = json.loads(lines[i])
+                
+                if i < end_idx:
+                    # 中间楼层：清空内容
+                    msg_data['mes'] = ""
+                    msg_data['is_summarized'] = True
+                else:
+                    # 最后一个楼层：放入总结文本
+                    msg_data['mes'] = summary_text
+                    msg_data['is_summary'] = True
+                    msg_data['summary_range'] = f"L{start_floor}-L{end_floor}"
+                
+                lines[i] = json.dumps(msg_data, ensure_ascii=False) + '\n'
+            
+            # 写回文件
+            with open(chat_file, 'w', encoding='utf-8') as f:
+                f.writelines(lines)
+            
+            logger.info(
+                f"[ChatService] 总结完成: {role_name}/{chat_name}, "
+                f"楼层 {start_floor}-{end_floor}"
+            )
+            
+            return True
+            
+        except Exception as e:
+            logger.error(f"总结聊天消息失败 {role_name}/{chat_name}: {str(e)}")
+            raise
+
+
+# 全局实例
+chat_service = ChatService(Path(settings.DATA_PATH))