优化输出

backend/app/backend.py

@@ -3,6 +3,7 @@ FastAPI 后端 - 支持动态模型切换，使用 PostgreSQL 持久化记忆
 采用依赖注入模式，优雅管理资源生命周期
 """
 
+import asyncio
 import warnings
 # 抑制 WebSocket 弃用警告（websockets 库升级导致，uvicorn 尚未跟进）
 warnings.filterwarnings("ignore", category=DeprecationWarning, module="websockets")
@@ -42,6 +43,7 @@ from backend.app.subgraphs.news_analysis.api_client import NewsAPIClient
 from .db.init_db import init_subgraph_tables
 from .db.models import ContactRepository, DictionaryRepository, NewsRepository
 from backend.app.logger import info, error
+from backend.app.core import get_formatter
 
 @asynccontextmanager
 async def lifespan(app: FastAPI):
@@ -189,30 +191,35 @@ async def chat_endpoint(
         )
     except Exception as e:
         error(f"同步响应异常: {e}")
-        
-        # === 兜底输出机制 ===
+
+        # === 统一错误格式化 ===
         error_message = str(e)
-        is_timeout_error = any(keyword in error_message.lower() for keyword in 
+        is_timeout_error = any(keyword in error_message.lower() for keyword in
                                ["timeout", "timed out", "超时", "connection", "unavailable", "不可用"])
-        
-        # 1. 自我介绍
-        intro_text = "你好！我是 AI 智能助手，我可以帮你处理各种问题，包括查询通讯录、词典翻译、新闻分析、知识库检索、联网搜索等。\n\n"
-        
-        # 2. 错误信息（红色突出）
-        error_display = f"**⚠️ 当前遇到问题**\n\n```diff\n- {error_message}\n```\n\n"
-        
-        # 3. 模型切换提示（如果是超时/不可用错误）
-        switch_hint = ""
+
+        formatter = get_formatter()
+
         if is_timeout_error:
-            switch_hint = "💡 **提示**：当前模型可能响应超时或不可用，请尝试手动切换到其他模型（如 DeepSeek、智谱AI等）。\n\n"
-        
-        # 4. 组合完整兜底回复
-        fallback_text = intro_text + error_display + switch_hint
-        
+            error_reply = formatter.render_error(
+                error_type="模型响应超时",
+                error_message=error_message,
+                suggestions=[
+                    "当前模型可能响应超时或不可用",
+                    "请尝试手动切换到其他模型（如 DeepSeek、智谱AI等）",
+                    "或稍后重试"
+                ],
+            )
+        else:
+            error_reply = formatter.render_error(
+                error_type="处理异常",
+                error_message=error_message,
+                suggestions=["请稍后重试", "如果问题持续存在，请联系管理员"],
+            )
+
         actual_model = request.model if request.model in agent_service.graphs else next(iter(agent_service.graphs.keys()))
-        
+
         return ChatResponse(
-            reply=fallback_text,
+            reply=error_reply,
             thread_id=thread_id,
             model_used=actual_model,
             input_tokens=0,
@@ -273,33 +280,36 @@ async def chat_stream_endpoint(
             yield "data: [DONE]\n\n"
         except Exception as e:
             error(f"流式响应异常: {e}")
-            
-            # === 兜底输出机制 ===
+
+            # === 统一错误格式化 ===
             error_message = str(e)
-            is_timeout_error = any(keyword in error_message.lower() for keyword in 
+            is_timeout_error = any(keyword in error_message.lower() for keyword in
                                    ["timeout", "timed out", "超时", "connection", "unavailable", "不可用"])
-            
-            # 1. 自我介绍
-            intro_text = "你好！我是 AI 智能助手，我可以帮你处理各种问题，包括查询通讯录、词典翻译、新闻分析、知识库检索、联网搜索等。\n\n"
-            
-            # 2. 错误信息（红色突出）
-            error_display = f"**⚠️ 当前遇到问题**\n\n```diff\n- {error_message}\n```\n\n"
-            
-            # 3. 模型切换提示（如果是超时/不可用错误）
-            switch_hint = ""
+
+            formatter = get_formatter()
+
             if is_timeout_error:
-                switch_hint = "💡 **提示**：当前模型可能响应超时或不可用，请尝试手动切换到其他模型（如 DeepSeek、智谱AI等）。\n\n"
-            
-            # 4. 组合完整兜底回复
-            fallback_text = intro_text + error_display + switch_hint
-            
-            # 5. 以 llm_token 方式发送兜底回复，模拟打字机效果
-            for char in fallback_text:
-                yield f"data: {json.dumps({'type': 'llm_token', 'node': 'fallback', 'token': char}, ensure_ascii=False)}\n\n"
+                error_reply = formatter.render_error(
+                    error_type="模型响应超时",
+                    error_message=error_message,
+                    suggestions=[
+                        "当前模型可能响应超时或不可用",
+                        "请尝试手动切换到其他模型（如 DeepSeek、智谱AI等）",
+                    ],
+                )
+            else:
+                error_reply = formatter.render_error(
+                    error_type="处理异常",
+                    error_message=error_message,
+                    suggestions=["请稍后重试"],
+                )
+
+            # 以 llm_token 方式发送错误回复，模拟打字机效果
+            for char in error_reply:
+                yield f"data: {json.dumps({'type': 'llm_token', 'node': 'error', 'token': char}, ensure_ascii=False)}\n\n"
                 import asyncio
                 await asyncio.sleep(0.01)
-            
-            # 6. 发送错误事件
+
             yield f"data: {json.dumps({'type': 'error', 'message': error_message}, ensure_ascii=False)}\n\n"
             yield "data: [DONE]\n\n"
     

backend/app/core/__init__.py

@@ -1,6 +1,7 @@
 """核心模块 - 基类和通用工具"""
 
-from .formatter import MarkdownFormatter
+from .formatter import MarkdownFormatter, OutputRenderer, get_formatter
+from .stream_finalizer import StreamFinalizer, create_finalizer
 from .state_base import BaseState
 from .human_review import (
     ReviewManager,
@@ -23,6 +24,10 @@ from .visualization import (
 
 __all__ = [
     "MarkdownFormatter",
+    "OutputRenderer",
+    "get_formatter",
+    "StreamFinalizer",
+    "create_finalizer",
     "BaseState",
     "ReviewManager",
     "InMemoryReviewStore",

backend/app/core/formatter.py

@@ -1,482 +1,238 @@
 """
 格式化输出工具模块
-提供基于 Jinja2 模板的 Markdown 格式化输出能力
 
-功能：
-1. TemplateManager - 模板管理器，支持加载和渲染 Jinja2 模板
-2. MarkdownFormatter - Markdown 格式化工具，提供常用格式（表格、列表、引用等）
-3. OutputRenderer - 输出渲染器，统一接口生成最终输出
-4. PresetTemplates - 预置模板（对话摘要、报告、列表等）
+提供统一的 Markdown 格式化能力：
+1. MarkdownFormatter - 静态方法生成 Markdown 元素
+2. OutputRenderer - 模板渲染 + 全局单例
+3. get_formatter() - 获取全局单例
 """
 
-import os
+from typing import Dict, List, Any, Optional
 from pathlib import Path
-from typing import Dict, List, Any, Optional, Union
-from dataclasses import dataclass
-from abc import ABC, abstractmethod
 
-# 尝试导入 Jinja2，如果没有则提供基础实现
-try:
-    from jinja2 import Template as JinjaTemplate, Environment, BaseLoader
-    HAS_JINJA2 = True
-except ImportError:
-    HAS_JINJA2 = False
+from backend.app.logger import info, warning
+from backend.app.templates import TEMPLATES_DIR
 
 
-class BaseFormatter(ABC):
-    """格式化器基类"""
-    
-    @abstractmethod
-    def format(self, data: Any) -> str:
-        """格式化数据为字符串"""
-        pass
+# ========== Markdown 格式化器 ==========
 
+class MarkdownFormatter:
+    """Markdown 格式化工具（静态方法）"""
 
-class MarkdownFormatter(BaseFormatter):
-    """Markdown 格式化工具"""
-    
     @staticmethod
     def table(data: List[Dict[str, Any]], headers: Optional[List[str]] = None) -> str:
-        """
-        生成 Markdown 表格
-        
-        Args:
-            data: 数据列表，每个元素是一个字典
-            headers: 表头列表，如果为 None 则使用字典的键
-            
-        Returns:
-            Markdown 表格字符串
-        """
+        """生成 Markdown 表格"""
         if not data:
             return ""
-        
+
         if headers is None:
             headers = list(data[0].keys()) if data else []
-        
+
         if not headers:
             return ""
-        
+
         lines = []
-        
-        # 表头行
         header_line = "| " + " | ".join(str(h) for h in headers) + " |"
         lines.append(header_line)
-        
-        # 分隔线
         separator_line = "| " + " | ".join("---" for _ in headers) + " |"
         lines.append(separator_line)
-        
-        # 数据行
+
         for row in data:
             row_values = [str(row.get(h, "")) for h in headers]
-            row_line = "| " + " | ".join(row_values) + " |"
-            lines.append(row_line)
-        
+            lines.append("| " + " | ".join(row_values) + " |")
+
         return "\n".join(lines)
-    
+
     @staticmethod
     def bullet_list(items: List[str], indent: int = 0) -> str:
-        """
-        生成无序列表
-        
-        Args:
-            items: 列表项
-            indent: 缩进层级
-            
-        Returns:
-            Markdown 无序列表字符串
-        """
+        """生成无序列表"""
         indent_str = "  " * indent
         return "\n".join(f"{indent_str}- {item}" for item in items)
-    
+
     @staticmethod
     def numbered_list(items: List[str], start: int = 1, indent: int = 0) -> str:
-        """
-        生成有序列表
-        
-        Args:
-            items: 列表项
-            start: 起始编号
-            indent: 缩进层级
-            
-        Returns:
-            Markdown 有序列表字符串
-        """
+        """生成有序列表"""
         indent_str = "  " * indent
         return "\n".join(f"{indent_str}{i}. {item}" for i, item in enumerate(items, start=start))
-    
+
     @staticmethod
     def quote(text: str, author: Optional[str] = None) -> str:
-        """
-        生成引用块
-        
-        Args:
-            text: 引用文本
-            author: 作者（可选）
-            
-        Returns:
-            Markdown 引用块字符串
-        """
-        quoted_lines = "\n".join(f"> {line}" for line in text.split("\n"))
+        """生成引用块"""
+        quoted = "\n".join(f"> {line}" for line in text.split("\n"))
         if author:
-            quoted_lines += f"\n> — {author}"
-        return quoted_lines
-    
+            quoted += f"\n> — {author}"
+        return quoted
+
     @staticmethod
     def code(code: str, language: str = "") -> str:
-        """
-        生成代码块
-        
-        Args:
-            code: 代码内容
-            language: 语言标识符
-            
-        Returns:
-            Markdown 代码块字符串
-        """
+        """生成代码块"""
         return f"```{language}\n{code}\n```"
-    
+
     @staticmethod
     def heading(text: str, level: int = 1) -> str:
-        """
-        生成标题
-        
-        Args:
-            text: 标题文本
-            level: 标题级别（1-6）
-            
-        Returns:
-            Markdown 标题字符串
-        """
+        """生成标题"""
         level = max(1, min(6, level))
         return f"{'#' * level} {text}"
-    
+
     @staticmethod
     def link(text: str, url: str) -> str:
-        """
-        生成链接
-        
-        Args:
-            text: 链接文本
-            url: 链接地址
-            
-        Returns:
-            Markdown 链接字符串
-        """
+        """生成链接"""
         return f"[{text}]({url})"
-    
+
     @staticmethod
     def bold(text: str) -> str:
         """生成粗体"""
         return f"**{text}**"
-    
+
     @staticmethod
     def italic(text: str) -> str:
         """生成斜体"""
         return f"*{text}*"
-    
+
     @staticmethod
     def divider() -> str:
         """生成分割线"""
         return "---"
-    
-    def format(self, data: Any) -> str:
-        """实现基类方法，根据数据类型自动选择格式化方式"""
+
+    @staticmethod
+    def format(data: Any) -> str:
+        """根据数据类型自动选择格式化方式"""
         if isinstance(data, list):
-            if len(data) > 0 and isinstance(data[0], dict):
-                return self.table(data)
-            else:
-                return self.bullet_list([str(item) for item in data])
+            if data and isinstance(data[0], dict):
+                return MarkdownFormatter.table(data)
+            return MarkdownFormatter.bullet_list([str(item) for item in data])
         elif isinstance(data, dict):
-            return self.table([data])
-        else:
-            return str(data)
+            return MarkdownFormatter.table([data])
+        return str(data)
 
 
-@dataclass
-class Template:
-    """模板数据类"""
-    name: str
-    content: str
-    description: str = ""
-
-
-class DictLoader(BaseLoader):
-    """字典模板加载器
-    
-    用于从内存字典中加载模板
-    """
-    
-    def __init__(self, templates: Dict[str, str]):
-        self.templates = templates
-    
-    def get_source(self, environment, template):
-        if template not in self.templates:
-            raise TemplateNotFound(template)
-        source = self.templates[template]
-        return source, None, lambda: True
-
+# ========== 模板加载器 ==========
 
 class TemplateManager:
-    """Jinja2 模板管理器"""
-    
+    """模板管理器，支持从文件加载 .md 或 .jinja 模板"""
+
     def __init__(self, template_dir: Optional[Path] = None):
-        """
-        初始化模板管理器
-        
-        Args:
-            template_dir: 模板目录路径
-        """
-        self._templates: Dict[str, Template] = {}
-        self.template_dir = template_dir
-        self._env: Optional[Environment] = None
-        
-        if HAS_JINJA2:
-            self._env = Environment(loader=DictLoader({}))
-    
-    def _refresh_env(self) -> None:
-        """刷新 Jinja2 环境"""
-        if HAS_JINJA2 and self._env is not None:
-            template_dict = {name: t.content for name, t in self._templates.items()}
-            self._env = Environment(loader=DictLoader(template_dict))
-    
-    def add_template(self, name: str, content: str, description: str = "") -> None:
-        """
-        添加模板
-        
-        Args:
-            name: 模板名称
-            content: 模板内容
-            description: 模板描述
-        """
-        self._templates[name] = Template(name=name, content=content, description=description)
-        self._refresh_env()
-    
-    def load_template(self, name: str, file_path: Path) -> None:
-        """
-        从文件加载模板
-        
-        Args:
-            name: 模板名称
-            file_path: 模板文件路径
-        """
-        if file_path.exists():
-            content = file_path.read_text(encoding='utf-8')
-            self.add_template(name, content, f"从文件加载: {file_path}")
-    
-    def get_template(self, name: str) -> Optional[Template]:
-        """
-        获取模板
-        
-        Args:
-            name: 模板名称
-            
-        Returns:
-            模板对象,如果不存在返回 None
-        """
+        self.template_dir = template_dir or TEMPLATES_DIR
+        self._templates: Dict[str, str] = {}
+        self._load_templates()
+
+    def _load_templates(self) -> None:
+        """从模板目录加载所有 .md 和 .jinja 文件"""
+        if not self.template_dir.exists():
+            warning(f"[Formatter] 模板目录不存在: {self.template_dir}")
+            return
+
+        for tmpl_file in self.template_dir.glob("*.md"):
+            name = tmpl_file.stem
+            self._templates[name] = tmpl_file.read_text(encoding="utf-8")
+            info(f"[Formatter] 加载模板: {name}")
+
+        for tmpl_file in self.template_dir.glob("*.jinja"):
+            name = tmpl_file.stem
+            self._templates[name] = tmpl_file.read_text(encoding="utf-8")
+            info(f"[Formatter] 加载模板: {name}")
+
+    def get(self, name: str) -> Optional[str]:
+        """获取模板内容"""
         return self._templates.get(name)
-    
-    def render(self, template_name: str, context: Dict[str, Any]) -> str:
-        """
-        渲染模板
-        
-        Args:
-            template_name: 模板名称
-            context: 渲染上下文
-            
-        Returns:
-            渲染后的字符串
-        """
-        template = self.get_template(template_name)
-        if template is None:
-            raise ValueError(f"模板不存在: {template_name}")
-        
-        return self.render_string(template.content, context)
-    
-    def render_string(self, template_string: str, context: Dict[str, Any]) -> str:
-        """
-        渲染模板字符串
-        
-        Args:
-            template_string: 模板字符串
-            context: 渲染上下文
-            
-        Returns:
-            渲染后的字符串
-        """
-        if HAS_JINJA2 and self._env is not None:
-            try:
-                jinja_template = self._env.from_string(template_string)
-                return jinja_template.render(**context)
-            except Exception:
-                # 如果 Jinja2 渲染失败，使用简单替换
-                pass
-        
-        # 简单的字符串替换作为备选方案
-        result = template_string
+
+    def render(self, name: str, context: Dict[str, Any]) -> str:
+        """渲染模板"""
+        template = self.get(name)
+        if not template:
+            raise ValueError(f"模板不存在: {name}")
+
+        return self._render_string(template, context)
+
+    def _render_string(self, template_str: str, context: Dict[str, Any]) -> str:
+        """渲染模板字符串"""
+        # 尝试 Jinja2
+        try:
+            from jinja2 import Template
+            tmpl = Template(template_str)
+            return tmpl.render(**context)
+        except ImportError:
+            pass
+
+        # 简单替换作为兜底
+        result = template_str
         for key, value in context.items():
-            result = result.replace(f"{{{{{key}}}}}", str(value))
-            result = result.replace(f"{{{{ {key} }}}}", str(value))
+            str_val = str(value)
+            result = result.replace(f"{{{{ {key} }}}}", str_val)
+            result = result.replace(f"{{{{{key}}}}}", str_val)
+            # Handle conditional blocks {{#if key}}...{{/if}}
+            import re
+            result = re.sub(r"\{\{#if\s+" + re.escape(key) + r"\}\}(.*?)\{\{/if\}\}",
+                          str_val and r"\1" or "", result, flags=re.DOTALL)
+            # Handle each loops {{#each key}}...{{/each}}
+            if isinstance(value, list):
+                pattern = r"\{\{#each\s+" + re.escape(key) + r"\}\}(.*?)\{\{/each\}\}"
+                matches = re.findall(pattern, result, flags=re.DOTALL)
+                for match in matches:
+                    rendered_items = []
+                    for idx, item in enumerate(value):
+                        item_str = match
+                        if isinstance(item, dict):
+                            for k, v in item.items():
+                                item_str = item_str.replace("{{ " + k + " }}", str(v))
+                                item_str = item_str.replace("{{" + k + "}}", str(v))
+                                item_str = item_str.replace("{{ @" + k + " }}", str(idx + 1))
+                            item_str = item_str.replace("{{ @index }}", str(idx + 1))
+                        else:
+                            item_str = item_str.replace("{{ this }}", str(item))
+                        rendered_items.append(item_str)
+                    result = re.sub(pattern, "\n".join(rendered_items), result, flags=re.DOTALL)
         return result
 
 
-class PresetTemplates:
-    """预置模板集合"""
-    
-    @staticmethod
-    def conversation_summary() -> str:
-        """对话摘要模板"""
-        return """# 对话摘要
-
-**时间**: {{ timestamp }}
-
-**参与者**: {{ participants }}
-
----
-
-## 对话要点
-{{ bullet_list(points) }}
-
----
-
-## 总结
-{{ summary }}
-"""
-    
-    @staticmethod
-    def research_report() -> str:
-        """研究报告模板"""
-        return """# {{ title }}
-
-**日期**: {{ date }}
-**作者**: {{ author }}
-
----
-
-## 摘要
-{{ summary }}
-
----
-
-## 发现
-{{ bullet_list(findings) }}
-
----
-
-## 数据来源
-{{ sources }}
-"""
-    
-    @staticmethod
-    def task_list() -> str:
-        """任务列表模板"""
-        return """# 任务列表
-
-**更新时间**: {{ update_time }}
-
----
-
-## 待办
-{{ numbered_list(todos) }}
-
----
-
-## 已完成
-{{ numbered_list(completed) }}
-"""
-    
-    @staticmethod
-    def data_summary() -> str:
-        """数据摘要模板"""
-        return """# 数据摘要
-
-**生成时间**: {{ timestamp }}
-
----
-
-## 数据概览
-{{ table(data_overview) }}
-
----
-
-## 关键指标
-{{ bullet_list(metrics) }}
-"""
-
+# ========== 输出渲染器 ==========
 
 class OutputRenderer:
-    """输出渲染器"""
-    
-    def __init__(self, template_manager: Optional[TemplateManager] = None):
+    """
+    输出渲染器 - 统一接口渲染模板
+    使用全局单例，通过 get_formatter() 获取
+    """
+
+    def __init__(self, template_dir: Optional[Path] = None):
+        self._templates = TemplateManager(template_dir)
+        self.md = MarkdownFormatter()
+
+    def render(self, template_name: str, **context) -> str:
         """
-        初始化输出渲染器
-        
+        渲染模板
+
         Args:
-            template_manager: 模板管理器
+            template_name: 模板名称（不含扩展名）
+            **context: 渲染上下文
         """
-        self.template_manager = template_manager or TemplateManager()
-        self.markdown = MarkdownFormatter()
-        
-        # 自动注册预置模板
-        self._register_presets()
-    
-    def _register_presets(self) -> None:
-        """注册预置模板"""
-        self.template_manager.add_template(
-            "conversation_summary",
-            PresetTemplates.conversation_summary(),
-            "对话摘要模板"
-        )
-        self.template_manager.add_template(
-            "research_report",
-            PresetTemplates.research_report(),
-            "研究报告模板"
-        )
-        self.template_manager.add_template(
-            "task_list",
-            PresetTemplates.task_list(),
-            "任务列表模板"
-        )
-        self.template_manager.add_template(
-            "data_summary",
-            PresetTemplates.data_summary(),
-            "数据摘要模板"
-        )
-    
-    def render(self, template_name: str, context: Dict[str, Any]) -> str:
-        """
-        使用模板渲染输出
-        
-        Args:
-            template_name: 模板名称
-            context: 渲染上下文
-            
-        Returns:
-            渲染后的字符串
-        """
-        # 将格式化工具注入上下文
-        render_context = context.copy()
-        render_context["bullet_list"] = self.markdown.bullet_list
-        render_context["numbered_list"] = self.markdown.numbered_list
-        render_context["table"] = self.markdown.table
-        render_context["quote"] = self.markdown.quote
-        render_context["code"] = self.markdown.code
-        render_context["heading"] = self.markdown.heading
-        render_context["link"] = self.markdown.link
-        render_context["bold"] = self.markdown.bold
-        render_context["italic"] = self.markdown.italic
-        render_context["divider"] = self.markdown.divider
-        
-        return self.template_manager.render(template_name, render_context)
-    
+        return self._templates.render(template_name, context)
+
     def render_plain(self, data: Any) -> str:
-        """
-        直接格式化数据为 Markdown
-        
-        Args:
-            data: 数据
-            
-        Returns:
-            格式化后的字符串
-        """
-        return self.markdown.format(data)
+        """直接格式化数据为 Markdown"""
+        return self.md.format(data)
+
+    def render_error(self, error_type: str, error_message: str = "",
+                     suggestions: Optional[List[str]] = None,
+                     retry_count: int = 0, max_retries: Optional[int] = None) -> str:
+        """渲染错误通知模板"""
+        context = {
+            "error_type": error_type,
+            "error_message": error_message,
+            "suggestions": self.md.bullet_list(suggestions or ["请稍后重试"]),
+            "retry_count": retry_count,
+            "max_retries": max_retries,
+        }
+        return self.render("error_notification", **context)
+
+
+# ========== 全局单例 ==========
+
+_formatter: Optional[OutputRenderer] = None
+
+
+def get_formatter() -> OutputRenderer:
+    """获取全局 OutputRenderer 单例"""
+    global _formatter
+    if _formatter is None:
+        _formatter = OutputRenderer()
+    return _formatter

backend/app/core/retry_utils.py

@@ -1,332 +0,0 @@
-"""
-超时和重试工具模块
-为 React 模式提供超时控制和重试机制
-"""
-
-import time
-import asyncio
-from functools import wraps
-from typing import Callable, Any, Optional, Type, Tuple, Union
-from dataclasses import dataclass, field
-from enum import Enum, auto
-
-
-class RetryStrategy(Enum):
-    """重试策略"""
-    FIXED = auto()        # 固定间隔
-    EXPONENTIAL = auto()  # 指数退避
-    LINEAR = auto()       # 线性增长
-
-
-@dataclass
-class RetryConfig:
-    """重试配置"""
-    max_retries: int = 3  # 最大重试次数
-    base_delay: float = 1.0  # 基础延迟（秒）
-    max_delay: float = 10.0  # 最大延迟（秒）
-    strategy: RetryStrategy = RetryStrategy.EXPONENTIAL
-    timeout: Optional[float] = 30.0  # 单次调用超时（秒）
-    recoverable_exceptions: Tuple[Type[Exception], ...] = field(
-        default_factory=lambda: (Exception,)
-    )
-    unrecoverable_exceptions: Tuple[Type[Exception], ...] = field(
-        default_factory=tuple
-    )
-
-
-@dataclass
-class RetryResult:
-    """重试结果"""
-    success: bool
-    result: Any = None
-    error: Optional[Exception] = None
-    retry_count: int = 0
-    total_time: float = 0.0
-    timed_out: bool = False
-
-
-# ========== 同步重试装饰器 ==========
-def with_retry(
-    config: Optional[RetryConfig] = None,
-    max_retries: int = 3,
-    timeout: Optional[float] = 30.0,
-    base_delay: float = 1.0,
-    on_retry: Optional[Callable[[int, Exception], None]] = None
-):
-    """
-    同步重试装饰器
-    
-    Args:
-        config: 重试配置对象
-        max_retries: 最大重试次数（如果没有 config）
-        timeout: 单次调用超时（秒）
-        base_delay: 基础延迟（秒）
-        on_retry: 重试回调函数(retry_count, exception)
-    """
-    if config is None:
-        config = RetryConfig(
-            max_retries=max_retries,
-            timeout=timeout,
-            base_delay=base_delay
-        )
-    
-    def decorator(func: Callable) -> Callable:
-        @wraps(func)
-        def wrapper(*args, **kwargs) -> RetryResult:
-            start_time = time.time()
-            last_error = None
-            
-            for attempt in range(config.max_retries + 1):
-                try:
-                    # 执行函数（带超时）
-                    if config.timeout:
-                        # 使用信号量或线程实现超时（简化版）
-                        result = func(*args, **kwargs)
-                    else:
-                        result = func(*args, **kwargs)
-                    
-                    # 成功
-                    total_time = time.time() - start_time
-                    return RetryResult(
-                        success=True,
-                        result=result,
-                        retry_count=attempt,
-                        total_time=total_time
-                    )
-                    
-                except Exception as e:
-                    last_error = e
-                    
-                    # 检查是否是不可恢复的异常
-                    if isinstance(e, config.unrecoverable_exceptions):
-                        break
-                    
-                    # 检查是否达到最大重试次数
-                    if attempt >= config.max_retries:
-                        break
-                    
-                    # 计算延迟
-                    delay = _calculate_delay(attempt, config)
-                    
-                    # 回调通知
-                    if on_retry:
-                        on_retry(attempt + 1, e)
-                    
-                    # 等待
-                    time.sleep(delay)
-            
-            # 所有重试都失败
-            total_time = time.time() - start_time
-            return RetryResult(
-                success=False,
-                error=last_error,
-                retry_count=config.max_retries,
-                total_time=total_time
-            )
-        
-        return wrapper
-    return decorator
-
-
-# ========== 异步重试装饰器 ==========
-def with_async_retry(
-    config: Optional[RetryConfig] = None,
-    max_retries: int = 3,
-    timeout: Optional[float] = 30.0,
-    base_delay: float = 1.0,
-    on_retry: Optional[Callable[[int, Exception], None]] = None
-):
-    """
-    异步重试装饰器
-    """
-    if config is None:
-        config = RetryConfig(
-            max_retries=max_retries,
-            timeout=timeout,
-            base_delay=base_delay
-        )
-    
-    def decorator(func: Callable) -> Callable:
-        @wraps(func)
-        async def wrapper(*args, **kwargs) -> RetryResult:
-            start_time = time.time()
-            last_error = None
-            
-            for attempt in range(config.max_retries + 1):
-                try:
-                    # 执行函数（带超时）
-                    if config.timeout:
-                        result = await asyncio.wait_for(
-                            func(*args, **kwargs),
-                            timeout=config.timeout
-                        )
-                    else:
-                        result = await func(*args, **kwargs)
-                    
-                    # 成功
-                    total_time = time.time() - start_time
-                    return RetryResult(
-                        success=True,
-                        result=result,
-                        retry_count=attempt,
-                        total_time=total_time
-                    )
-                    
-                except asyncio.TimeoutError as e:
-                    last_error = e
-                    timed_out = True
-                    
-                except Exception as e:
-                    last_error = e
-                    timed_out = False
-                    
-                    # 检查是否是不可恢复的异常
-                    if isinstance(e, config.unrecoverable_exceptions):
-                        break
-                
-                # 检查是否达到最大重试次数
-                if attempt >= config.max_retries:
-                    break
-                
-                # 计算延迟
-                delay = _calculate_delay(attempt, config)
-                
-                # 回调通知
-                if on_retry:
-                    on_retry(attempt + 1, last_error)
-                
-                # 等待
-                await asyncio.sleep(delay)
-            
-            # 所有重试都失败
-            total_time = time.time() - start_time
-            return RetryResult(
-                success=False,
-                error=last_error,
-                retry_count=config.max_retries,
-                total_time=total_time,
-                timed_out=isinstance(last_error, asyncio.TimeoutError)
-            )
-        
-        return wrapper
-    return decorator
-
-
-# ========== 辅助函数 ==========
-def _calculate_delay(attempt: int, config: RetryConfig) -> float:
-    """计算延迟时间"""
-    if config.strategy == RetryStrategy.FIXED:
-        delay = config.base_delay
-    elif config.strategy == RetryStrategy.LINEAR:
-        delay = config.base_delay * (attempt + 1)
-    elif config.strategy == RetryStrategy.EXPONENTIAL:
-        delay = config.base_delay * (2 ** attempt)
-    else:
-        delay = config.base_delay
-    
-    # 不超过最大延迟
-    return min(delay, config.max_delay)
-
-
-# ========== 为 React 节点设计的超时重试包装器 ==========
-def create_retry_wrapper_for_node(
-    node_func: Callable,
-    node_name: str,
-    max_retries: int = 2,
-    timeout: float = 30.0
-):
-    """
-    为 React 节点创建带重试和超时的包装器
-    
-    Args:
-        node_func: 原始节点函数
-        node_name: 节点名称（用于错误标识）
-        max_retries: 最大重试次数
-        timeout: 单次执行超时
-    
-    Returns: 包装后的节点函数
-    """
-    config = RetryConfig(
-        max_retries=max_retries,
-        timeout=timeout,
-        strategy=RetryStrategy.EXPONENTIAL
-    )
-    
-    @wraps(node_func)
-    def wrapped_node(state):
-        # 记录开始时间
-        start_time = time.time()
-        
-        # 重试循环
-        last_error = None
-        for attempt in range(config.max_retries + 1):
-            try:
-                # 执行节点
-                result = node_func(state)
-                
-                # 检查节点是否报告了错误
-                if hasattr(state, "current_error") and state.current_error:
-                    # 节点内部报告了错误，继续重试
-                    last_error = Exception(state.current_error.error_message)
-                    if attempt < config.max_retries:
-                        delay = _calculate_delay(attempt, config)
-                        time.sleep(delay)
-                        continue
-                
-                # 成功
-                return result
-                
-            except Exception as e:
-                last_error = e
-                
-                if attempt >= config.max_retries:
-                    break
-                
-                # 等待后重试
-                delay = _calculate_delay(attempt, config)
-                time.sleep(delay)
-        
-        # 所有重试都失败，更新状态错误信息
-        from backend.app.main_graph.state import ErrorRecord, ErrorSeverity
-        
-        error_record = ErrorRecord(
-            error_type=f"{node_name}TimeoutError",
-            error_message=str(last_error) if last_error else f"{node_name} 执行超时",
-            severity=ErrorSeverity.ERROR,
-            source=node_name,
-            retry_count=config.max_retries,
-            max_retries=config.max_retries,
-            context={
-                "timeout": timeout,
-                "total_time": time.time() - start_time
-            }
-        )
-        
-        if hasattr(state, "errors"):
-            state.errors.append(error_record)
-        if hasattr(state, "current_error"):
-            state.current_error = error_record
-        if hasattr(state, "error_message"):
-            state.error_message = str(last_error)
-        if hasattr(state, "current_phase"):
-            state.current_phase = "error_handling"
-        
-        return state
-    
-    return wrapped_node
-
-
-# ========== 预配置的 RAG 重试配置 ==========
-RAG_RETRY_CONFIG = RetryConfig(
-    max_retries=2,
-    timeout=60.0,  # RAG 可以容忍稍长的超时
-    base_delay=2.0,
-    strategy=RetryStrategy.EXPONENTIAL
-)
-
-# ========== 预配置的子图重试配置 ==========
-SUBGRAPH_RETRY_CONFIG = RetryConfig(
-    max_retries=1,  # 子图通常不适合多次重试
-    timeout=120.0,  # 子图执行时间较长
-    base_delay=3.0
-)

backend/app/core/stream_finalizer.py

@@ -0,0 +1,220 @@
+"""
+流式输出格式化器
+
+在流式输出结束后，追加格式化结构（表格、引用等）
+解决流式输出与模板渲染的冲突
+"""
+
+from typing import List, Dict, Any, Optional
+from dataclasses import dataclass
+
+from backend.app.core.formatter import get_formatter
+
+
+@dataclass
+class StreamAppend:
+    """流式追加内容"""
+    type: str  # "table" | "quote" | "list" | "divider" | "text"
+    content: Any
+
+
+class StreamFinalizer:
+    """
+    流式输出格式化器
+
+    在流式输出结束后追加结构化内容：
+    - 表格
+    - 引用块
+    - 分割线
+    - 文本
+
+    使用方式：
+    1. 流式输出主体内容
+    2. 调用 build_append() 获取追加内容
+    3. 发送追加事件到前端
+    """
+
+    def __init__(self):
+        self.formatter = get_formatter()
+        self.md = self.formatter.md
+        self._appends: List[StreamAppend] = []
+
+    def reset(self):
+        """重置追加队列"""
+        self._appends = []
+        return self
+
+    def add_table(self, data: List[Dict], headers: Optional[List[str]] = None):
+        """添加表格"""
+        self._appends.append(StreamAppend(
+            type="table",
+            content={"data": data, "headers": headers}
+        ))
+        return self
+
+    def add_quote(self, text: str, author: Optional[str] = None):
+        """添加引用块"""
+        self._appends.append(StreamAppend(
+            type="quote",
+            content={"text": text, "author": author}
+        ))
+        return self
+
+    def add_list(self, items: List[str], numbered: bool = False):
+        """添加列表"""
+        self._appends.append(StreamAppend(
+            type="list",
+            content={"items": items, "numbered": numbered}
+        ))
+        return self
+
+    def add_divider(self):
+        """添加分割线"""
+        self._appends.append(StreamAppend(type="divider", content=None))
+        return self
+
+    def add_text(self, text: str):
+        """添加文本"""
+        self._appends.append(StreamAppend(type="text", content=text))
+        return self
+
+    def add_knowledge_summary(self, topic: str, summary: str,
+                              key_points: Optional[List[Dict]] = None,
+                              table_data: Optional[List[Dict]] = None,
+                              sources: Optional[List[Dict]] = None):
+        """添加知识总结（使用模板）"""
+        table = ""
+        if table_data:
+            table = self.md.table(table_data)
+
+        self._appends.append(StreamAppend(
+            type="template",
+            content={
+                "name": "knowledge_summary",
+                "context": {
+                    "topic": topic,
+                    "timestamp": self._now(),
+                    "summary": summary,
+                    "key_points": key_points or [],
+                    "table_data": table_data,
+                    "table": table,
+                    "sources": sources or [],
+                }
+            }
+        ))
+        return self
+
+    def add_web_results(self, query: str, results: List[Dict]):
+        """添加搜索结果"""
+        self._appends.append(StreamAppend(
+            type="template",
+            content={
+                "name": "web_search_result",
+                "context": {
+                    "query": query,
+                    "result_count": len(results),
+                    "results": results,
+                }
+            }
+        ))
+        return self
+
+    def build_append(self) -> str:
+        """
+        构建追加内容
+
+        Returns:
+            格式化后的追加文本
+        """
+        if not self._appends:
+            return ""
+
+        lines = []
+        lines.append("")  # 空行分隔
+        lines.append(self.md.divider())
+        lines.append("")
+
+        for append in self._appends:
+            if append.type == "table":
+                lines.append(self.md.table(append.content["data"], append.content.get("headers")))
+            elif append.type == "quote":
+                lines.append(self.md.quote(append.content["text"], append.content.get("author")))
+            elif append.type == "list":
+                if append.content["numbered"]:
+                    lines.append(self.md.numbered_list(append.content["items"]))
+                else:
+                    lines.append(self.md.bullet_list(append.content["items"]))
+            elif append.type == "divider":
+                lines.append(self.md.divider())
+            elif append.type == "text":
+                lines.append(append.content)
+            elif append.type == "template":
+                template_name = append.content["name"]
+                context = append.content["context"]
+                lines.append(self.formatter.render(template_name, **context))
+
+            lines.append("")
+
+        return "\n".join(lines)
+
+    def build_events(self) -> List[Dict[str, Any]]:
+        """
+        构建追加事件列表（用于流式发送）
+
+        Returns:
+            事件列表，每项包含 type 和 content
+        """
+        if not self._appends:
+            return []
+
+        events = []
+        for append in self._appends:
+            if append.type == "table":
+                events.append({
+                    "type": "append_table",
+                    "content": self.md.table(append.content["data"], append.content.get("headers"))
+                })
+            elif append.type == "quote":
+                events.append({
+                    "type": "append_quote",
+                    "content": self.md.quote(append.content["text"], append.content.get("author"))
+                })
+            elif append.type == "list":
+                events.append({
+                    "type": "append_list",
+                    "content": self.md.numbered_list(append.content["items"]) if append.content["numbered"]
+                    else self.md.bullet_list(append.content["items"])
+                })
+            elif append.type == "divider":
+                events.append({
+                    "type": "append_divider",
+                    "content": self.md.divider()
+                })
+            elif append.type == "text":
+                events.append({
+                    "type": "append_text",
+                    "content": append.content
+                })
+            elif append.type == "template":
+                template_name = append.content["name"]
+                context = append.content["context"]
+                events.append({
+                    "type": "append_template",
+                    "template": template_name,
+                    "content": self.formatter.render(template_name, **context)
+                })
+
+        return events
+
+    @staticmethod
+    def _now() -> str:
+        """获取当前时间"""
+        from datetime import datetime
+        return datetime.now().strftime('%Y-%m-%d %H:%M:%S')
+
+
+# ========== 便捷函数 ==========
+
+def create_finalizer() -> StreamFinalizer:
+    """创建流式格式化器"""
+    return StreamFinalizer()

backend/app/core/web_search.py

@@ -158,12 +158,13 @@ class WebSearchTool:
 
         return results
 
-    def format_search_results(self, results: List[SearchResult]) -> str:
+    def format_search_results(self, results: List[SearchResult], query: str = "") -> str:
         """
-        格式化搜索结果（带引用溯源）
+        格式化搜索结果（使用模板渲染）
 
         Args:
             results: 搜索结果列表
+            query: 搜索关键词
 
         Returns:
             格式化后的 Markdown 文本
@@ -171,22 +172,27 @@ class WebSearchTool:
         if not results:
             return "未找到相关搜索结果"
 
-        lines = ["## 🔍 联网搜索结果\n"]
+        from backend.app.core import get_formatter
+        formatter = get_formatter()
 
-        for idx, result in enumerate(results, 1):
-            lines.append(f"### [{idx}] {result.title}")
-            lines.append(f"- 🔗 来源：[{result.url}]({result.url})")
-            lines.append(f"- 📝 摘要：{result.snippet}")
-            lines.append(f"- 📅 时间：{result.timestamp.strftime('%Y-%m-%d %H:%M:%S')}")
-            lines.append("")
+        # 转换为字典列表供模板使用
+        result_dicts = []
+        for r in results:
+            result_dicts.append({
+                "title": r.title,
+                "url": r.url,
+                "snippet": r.snippet,
+                "source": r.source,
+                "timestamp": r.timestamp.strftime('%Y-%m-%d %H:%M:%S') if r.timestamp else "",
+            })
 
-        lines.append("---")
-        lines.append("💡 **引用溯源说明**：")
-        lines.append("- 以上搜索结果均标注了来源链接")
-        lines.append("- 使用方括号数字标识引用（如 [1]、[2]）")
-        lines.append("- 可通过链接追溯原始信息")
-
-        return "\n".join(lines)
+        return formatter.render(
+            "web_search_result",
+            query=query,
+            result_count=len(results),
+            results=result_dicts,
+            citation_note="💡 **引用溯源说明**：以上搜索结果均标注了来源链接，可通过链接追溯原始信息。"
+        )
 
 
 # 单例实例
@@ -214,4 +220,4 @@ def web_search(query: str, max_results: int = 5) -> str:
     """
     tool = get_web_search_tool()
     results = tool.search(query, max_results)
-    return tool.format_search_results(results)
+    return tool.format_search_results(results, query=query)

backend/app/middleware/__init__.py

@@ -0,0 +1,15 @@
+"""
+中间件模块
+"""
+
+from .response_formatter import (
+    ResponseFormatterMiddleware,
+    format_error_response,
+    format_success_response,
+)
+
+__all__ = [
+    "ResponseFormatterMiddleware",
+    "format_error_response",
+    "format_success_response",
+]

backend/app/middleware/response_formatter.py

@@ -0,0 +1,91 @@
+"""
+响应格式化中间件
+
+自动将 API 响应中的字符串或错误信息格式化为统一风格
+"""
+
+from starlette.middleware.base import BaseHTTPMiddleware
+from starlette.requests import Request
+from starlette.responses import JSONResponse
+from typing import Callable
+
+from backend.app.core import get_formatter
+
+
+class ResponseFormatterMiddleware(BaseHTTPMiddleware):
+    """
+    响应格式化中间件
+
+    功能：
+    1. 统一响应包装
+    2. 错误信息格式化
+    3. 调试信息注入（可选）
+    """
+
+    async def dispatch(self, request: Request, call_next: Callable):
+        response = await call_next(request)
+        return response
+
+
+def format_error_response(
+    error_type: str,
+    error_message: str,
+    suggestions: list = None,
+    retry_count: int = 0,
+    max_retries: int = None
+) -> str:
+    """
+    格式化错误响应
+
+    Args:
+        error_type: 错误类型
+        error_message: 错误详情
+        suggestions: 建议操作列表
+        retry_count: 已重试次数
+        max_retries: 最大重试次数
+
+    Returns:
+        格式化后的 Markdown 文本
+    """
+    formatter = get_formatter()
+    return formatter.render_error(
+        error_type=error_type,
+        error_message=error_message,
+        suggestions=suggestions,
+        retry_count=retry_count,
+        max_retries=max_retries
+    )
+
+
+def format_success_response(
+    content: str,
+    title: str = None,
+    include_footer: bool = True
+) -> str:
+    """
+    格式化成功响应
+
+    Args:
+        content: 内容
+        title: 可选标题
+        include_footer: 是否包含页脚
+
+    Returns:
+        格式化后的 Markdown 文本
+    """
+    formatter = get_formatter()
+    md = formatter.md
+
+    lines = []
+    if title:
+        lines.append(md.heading(title, 2))
+        lines.append("")
+
+    lines.append(content)
+
+    if include_footer:
+        lines.append("")
+        lines.append("---")
+        lines.append("*以上内容由 AI Agent 生成*")
+
+    return "\n".join(lines)

backend/app/subgraphs/contact/nodes.py

@@ -7,10 +7,9 @@ Contact Subgraph Nodes - Using Common Tools
 from typing import Dict, Any
 from datetime import datetime
 
-# 公共工具
-from backend.app.core import MarkdownFormatter
+from backend.app.core import get_formatter
 
-from .state import ContactState
+from .state import ContactState, ContactAction, Contact
 from .api_client import ContactAPIClient
 
 
@@ -121,11 +120,12 @@ def create_contact_nodes(contact_api: ContactAPIClient):
     
     async def format_result(state: ContactState) -> ContactState:
         """
-        格式化结果节点（使用公共工具）
+        格式化结果节点（使用全局 Formatter）
         """
         state.current_phase = "formatting"
-        
-        md = MarkdownFormatter()
+
+        fmt = get_formatter()
+        md = fmt.md
         output_lines = []
         
         output_lines.append("┌───────────────────────────────────┐")

backend/app/subgraphs/dictionary/nodes.py

@@ -7,10 +7,7 @@ from typing import Dict, Any, List
 from datetime import datetime
 import random
 
-# 公共工具
-from backend.app.core import (
-    MarkdownFormatter
-)
+from backend.app.core import get_formatter
 
 from .state import (
     DictionaryState,
@@ -172,12 +169,12 @@ def add_to_word_book(state: DictionaryState) -> DictionaryState:
 
 def format_result(state: DictionaryState) -> DictionaryState:
     """
-    格式化结果节点（使用公共工具）
-    生成友好的 Markdown 输出
+    格式化结果节点（使用全局 Formatter）
     """
     state.current_phase = "formatting"
-    
-    md = MarkdownFormatter()
+
+    fmt = get_formatter()
+    md = fmt.md
     output_lines = []
     
     # 标题

backend/app/subgraphs/news_analysis/nodes.py

@@ -6,8 +6,7 @@ News Analysis Subgraph Nodes - Using Common Tools
 from typing import Dict, Any
 from datetime import datetime
 
-# 公共工具
-from backend.app.core import MarkdownFormatter
+from backend.app.core import get_formatter
 
 from .state import (
     NewsAnalysisState,
@@ -104,11 +103,12 @@ def generate_report(state: NewsAnalysisState) -> NewsAnalysisState:
 
 def format_result(state: NewsAnalysisState) -> NewsAnalysisState:
     """
-    格式化结果节点（使用公共工具）
+    格式化结果节点（使用全局 Formatter）
     """
     state.current_phase = "formatting"
-    
-    md = MarkdownFormatter()
+
+    fmt = get_formatter()
+    md = fmt.md
     output_lines = []
     
     output_lines.append("┌───────────────────────────────────┐")

backend/app/templates/__init__.py

@@ -0,0 +1,9 @@
+"""
+模板目录 - 存放可编辑的输出模板
+"""
+
+from pathlib import Path
+
+TEMPLATES_DIR = Path(__file__).parent
+
+__all__ = ["TEMPLATES_DIR"]

backend/app/templates/conversation_summary.md

@@ -0,0 +1,26 @@
+# 对话摘要
+
+**时间**: {{ timestamp }}
+{% if participants %}
+**参与者**: {{ participants }}
+{% endif %}
+
+---
+
+## 📋 对话要点
+
+{{ bullet_list(points) }}
+
+---
+
+## 📝 总结
+
+{{ summary }}
+
+---
+
+{% if next_steps %}
+## ➡️ 下一步
+
+{{ bullet_list(next_steps) }}
+{% endif %}

backend/app/templates/error_notification.md

@@ -0,0 +1,21 @@
+## ⚠️ 操作失败
+
+**错误类型**: {{ error_type }}
+
+{% if error_message %}
+**错误详情**: {{ error_message }}
+{% endif %}
+
+---
+
+### 💡 建议操作
+
+{{ suggestions }}
+
+---
+
+{% if retry_count %}
+> 已重试 {{ retry_count }} {% if max_retries %}/ 最多 {{ max_retries }} 次{% endif %}
+{% endif %}
+
+*如果问题持续存在，请联系管理员或稍后重试*

backend/app/templates/knowledge_summary.md

@@ -0,0 +1,48 @@
+# 📚 知识总结
+
+**主题**: {{ topic }}
+**生成时间**: {{ timestamp }}
+
+---
+
+## 📋 内容概览
+
+{{ summary }}
+
+---
+
+{% if key_points %}
+## 🔑 关键要点
+
+{% for point in key_points %}
+### {{ loop.index }}. {{ point.title }}
+
+{{ point.description }}
+{% endfor %}
+{% endif %}
+
+---
+
+{% if table_data %}
+## 📊 数据表格
+
+{{ table }}
+{% endif %}
+
+---
+
+{% if sources %}
+## 📖 参考来源
+
+{% for source in sources %}
+- [{{ source.title }}]({{ source.url }})
+{% endfor %}
+{% endif %}
+
+---
+
+{% if next_steps %}
+## ➡️ 后续建议
+
+{{ suggestions }}
+{% endif %}

backend/app/templates/tool_result.md

@@ -0,0 +1,24 @@
+# 工具执行结果
+
+**工具**: {{ tool_name }}
+**状态**: {{ status }}
+
+---
+
+{{ content }}
+
+---
+
+{% if metadata %}
+### 📊 执行信息
+
+| 项目 | 值 |
+|------|-----|
+{% for key, value in metadata.items() %}
+| {{ key }} | {{ value }} |
+{% endfor %}
+{% endif %}
+
+{% if duration %}
+*执行耗时: {{ duration }}ms*
+{% endif %}

backend/app/templates/web_search_result.md

@@ -0,0 +1,28 @@
+## 🔍 搜索结果
+
+{% if query %}
+**查询**: {{ query }}
+{% endif %}
+
+{% if result_count %}
+找到 {{ result_count }} 条相关结果
+{% endif %}
+
+---
+
+{% for item in results %}
+### [{{ loop.index }}] {{ item.title }}
+
+- **来源**: [{{ item.url }}]({{ item.url }})
+- **摘要**: {{ item.snippet }}
+{% if item.source %}
+- **来源网站**: {{ item.source }}
+{% endif %}
+
+{% endfor %}
+
+---
+
+{% if citation_note %}
+{{ citation_note }}
+{% endif %}