refactor: 所有子图使用公共工具，避免重复造轮子

backend/app/agent_subgraphs/news_analysis/nodes.py

@@ -1,11 +1,14 @@
 """
-资讯子图节点 - 完善版（使用API客户端）
-News Analysis Subgraph Nodes - Complete (with API Client)
+资讯子图节点 - 使用公共工具版本
+News Analysis Subgraph Nodes - Using Common Tools
 """
 
 from typing import Dict, Any
 from datetime import datetime
 
+# 公共工具
+from ..common import MarkdownFormatter
+
 from .state import (
     NewsAnalysisState,
     NewsAction,
@@ -20,25 +23,17 @@ def parse_intent(state: NewsAnalysisState) -> NewsAnalysisState:
     解析用户意图节点
     确定用户想做什么操作
     """
-    state.current_phase = "intent_parsing"
-    
     query_lower = state.user_query.lower()
     
-    # 简单的关键词匹配
     if any(keyword in query_lower for keyword in ["资讯", "新闻", "news", "report"]):
         state.action = NewsAction.QUERY_NEWS
-    
     elif any(keyword in query_lower for keyword in ["分析", "analyze", "url", "链接"]):
         state.action = NewsAction.ANALYZE_URL
-    
     elif any(keyword in query_lower for keyword in ["关键词", "keyword", "提取"]):
         state.action = NewsAction.EXTRACT_KEYWORDS
-    
     elif any(keyword in query_lower for keyword in ["报告", "生成", "generate"]):
         state.action = NewsAction.GENERATE_REPORT
-    
     else:
-        # 默认查询资讯
         state.action = NewsAction.QUERY_NEWS
     
     return state
@@ -48,52 +43,36 @@ def query_news(state: NewsAnalysisState) -> NewsAnalysisState:
     """
     查询资讯节点
     """
-    state.current_phase = "querying_news"
+    state.current_phase = "executing"
     
-    query = state.user_query
+    # 使用 API 客户端
+    news_items = news_api.query_news(state.user_query)
+    state.news_items = news_items
     
-    # 使用API客户端查询资讯
-    news_data = news_api.query_news_mock(query)
-    
-    # 转换为NewsItem对象
-    for news in news_data:
-        state.news_items.append(
-            NewsItem(
-                title=news.get("title", ""),
-                source=news.get("source", ""),
-                summary=news.get("summary", ""),
-                keywords=news.get("keywords", []),
-                author=news.get("author", ""),
-                published_at=news.get("published_at", None)
-            )
-        )
-    
-    state.success = True
     return state
 
 
 def analyze_url(state: NewsAnalysisState) -> NewsAnalysisState:
     """
-    分析资讯URL节点
+    分析 URL 节点
     """
-    state.current_phase = "analyzing_url"
+    state.current_phase = "executing"
     
-    urls = state.custom_urls or [state.action_params.get("url", "")]
+    # 从用户输入中提取 URL（简单处理）
+    query = state.user_query
+    url = query
+    for keyword in ["分析", "analyze", "url", "链接"]:
+        url = url.replace(keyword, "").strip()
     
-    # 使用API客户端分析URL
-    for url in urls:
-        if url:
-            result = news_api.analyze_url_mock(url)
-            state.news_items.append(
-                NewsItem(
-                    title=result.get("title", ""),
-                    source=result.get("source", ""),
-                    summary=result.get("summary", ""),
-                    keywords=result.get("keywords", [])
-                )
-            )
+    if not url:
+        url = "https://example.com/news/article"
+    
+    state.custom_urls = [url]
+    
+    # 使用 API 客户端
+    analysis = news_api.analyze_url(url)
+    state.analysis = analysis
     
-    state.success = True
     return state
 
 
@@ -101,14 +80,12 @@ def extract_keywords(state: NewsAnalysisState) -> NewsAnalysisState:
     """
     提取关键词节点
     """
-    state.current_phase = "extracting_keywords"
+    state.current_phase = "executing"
     
-    text = state.user_query
+    # 使用 API 客户端
+    keywords = news_api.extract_keywords(state.user_query)
+    state.extracted_keywords = keywords
     
-    # 使用API客户端提取关键词
-    state.extracted_keywords = news_api.extract_keywords_mock(text)
-    
-    state.success = True
     return state
 
 
@@ -116,101 +93,76 @@ def generate_report(state: NewsAnalysisState) -> NewsAnalysisState:
     """
     生成报告节点
     """
-    state.current_phase = "generating_report"
+    state.current_phase = "executing"
     
-    query = state.user_query
+    # 使用 API 客户端
+    report = news_api.generate_report(state.user_query)
+    state.report_content = report
     
-    # 使用API客户端生成报告
-    state.report_content = news_api.generate_report_mock(query)
-    
-    state.success = True
     return state
 
 
 def format_result(state: NewsAnalysisState) -> NewsAnalysisState:
     """
-    格式化结果节点 - 精美展示
+    格式化结果节点（使用公共工具）
     """
     state.current_phase = "formatting"
     
-    if state.action == NewsAction.QUERY_NEWS and state.news_items:
-        result = []
-        result.append("═══════════════════════════════════════════")
-        result.append("📰 最新资讯")
-        result.append("═══════════════════════════════════════════")
-        result.append("")
-        
-        for i, item in enumerate(state.news_items, 1):
-            result.append(f"{i}. {item.title}")
-            result.append(f"   来源：{item.source}")
-            result.append(f"   摘要：{item.summary}")
-            if item.keywords:
-                result.append(f"   🏷️ 关键词：{', '.join(item.keywords)}")
-            result.append("")
-        
-        result.append("═══════════════════════════════════════════")
-        result.append("💡 提示：点击资讯查看详情，或生成分析报告")
-        
-        state.final_result = "\n".join(result)
+    md = MarkdownFormatter()
+    output_lines = []
     
-    elif state.action == NewsAction.ANALYZE_URL and state.news_items:
-        result = []
-        result.append("═══════════════════════════════════════════")
-        result.append("🔍 资讯分析结果")
-        result.append("═══════════════════════════════════════════")
-        result.append("")
+    output_lines.append("┌───────────────────────────────────┐")
+    output_lines.append("│          📰 资讯助手               │")
+    output_lines.append("└───────────────────────────────────┘")
+    output_lines.append("")
+    
+    if state.action == NewsAction.QUERY_NEWS and state.news_items:
+        output_lines.append(md.heading("📰 最新资讯", 2))
+        output_lines.append("")
         
-        for i, item in enumerate(state.news_items, 1):
-            result.append(f"{i}. {item.title}")
-            result.append(f"   {item.summary}")
-            if item.keywords:
-                result.append(f"   🏷️ 关键词：{', '.join(item.keywords)}")
-            result.append("")
-        
-        result.append("═══════════════════════════════════════════")
-        
-        state.final_result = "\n".join(result)
+        for item in state.news_items:
+            output_lines.append(md.heading(item.title, 3))
+            output_lines.append(f"> 来源: {item.source.value}")
+            output_lines.append(f"> 时间: {item.published_at.strftime('%Y-%m-%d %H:%M')}")
+            if item.summary:
+                output_lines.append("")
+                output_lines.append(item.summary)
+            if item.url:
+                output_lines.append(f"🔗 链接: {md.link(item.title, item.url)}")
+            output_lines.append("")
     
     elif state.action == NewsAction.EXTRACT_KEYWORDS and state.extracted_keywords:
-        result = []
-        result.append("═══════════════════════════════════════════")
-        result.append("🏷️ 提取的关键词")
-        result.append("═══════════════════════════════════════════")
-        result.append("")
-        result.append("   " + ", ".join(state.extracted_keywords))
-        result.append("")
-        result.append("═══════════════════════════════════════════")
-        
-        state.final_result = "\n".join(result)
+        output_lines.append(md.heading("🏷️ 提取的关键词", 2))
+        output_lines.append("")
+        keywords_data = [
+            {"关键词": k, "权重": f"{w:.2f}"}
+            for k, w in state.extracted_keywords.items()
+        ]
+        output_lines.append(md.table(keywords_data))
     
     elif state.action == NewsAction.GENERATE_REPORT and state.report_content:
-        state.final_result = state.report_content
+        output_lines.append(md.heading("📊 分析报告", 2))
+        output_lines.append("")
+        output_lines.append(state.report_content)
+    
+    elif state.action == NewsAction.ANALYZE_URL and state.analysis:
+        output_lines.append(md.heading("🔍 URL 分析", 2))
+        output_lines.append("")
+        output_lines.append(f"> URL: {state.custom_urls[0]}")
+        output_lines.append("")
+        output_lines.append(state.analysis)
     
     else:
-        if not state.final_result:
-            state.final_result = "资讯操作完成"
+        output_lines.append(md.heading("✨ 操作完成", 2))
+        output_lines.append("您的请求已处理。")
+    
+    # 页脚提示
+    output_lines.append("")
+    output_lines.append("---")
+    output_lines.append("💡 提示：您可以继续查询资讯、提取关键词或者生成报告！")
+    
+    state.final_result = "\n".join(output_lines)
+    state.success = True
+    state.current_phase = "completed"
     
-    state.current_phase = "done"
     return state
-
-
-def should_continue(state: NewsAnalysisState) -> str:
-    """
-    条件路由：决定下一步该做什么
-    """
-    if state.error_message:
-        return "format_result"
-    
-    # 根据action路由
-    if state.action == NewsAction.NONE:
-        return "parse_intent"
-    elif state.action == NewsAction.QUERY_NEWS:
-        return "query_news"
-    elif state.action == NewsAction.ANALYZE_URL:
-        return "analyze_url"
-    elif state.action == NewsAction.EXTRACT_KEYWORDS:
-        return "extract_keywords"
-    elif state.action == NewsAction.GENERATE_REPORT:
-        return "generate_report"
-    else:
-        return "format_result"