feat: 完成联网搜索功能实现和依赖更新

backend/app/core/intent.py

@@ -235,17 +235,15 @@ class ReactIntentReasoner:
                 result.metadata["target_subgraph"] = subgraph_name
                 return result
 
-        # 2. 检查是否需要联网搜索
-        web_search_keywords = ["最新", "今天", "近日", "热点", "新闻", "实时", "搜索", "网上", "互联网", "最新消息", "recent", "latest", "hot", "news", "search", "web"]
+        # 2. 检查是否需要联网搜索（谨慎触发）
+        # 只有用户明确要求搜索才触发
+        web_search_keywords = ["搜索", "搜索一下", "帮我搜", "search for", "web search", "搜索资料"]
         has_web_search = any(kw in query_lower for kw in web_search_keywords)
-        # 检查是否包含年份（比如2024、2025等），通常需要最新信息
-        import re
-        has_year = bool(re.search(r'202[3-9]|203[0-9]', query))
         
-        if has_web_search or has_year:
+        if has_web_search:
             result.action = ReasoningAction.WEB_SEARCH
-            result.confidence = 0.85 if has_web_search else 0.7
-            result.reasoning = "需要联网搜索最新信息"
+            result.confidence = 0.9
+            result.reasoning = "用户明确要求联网搜索"
             result.metadata["need_web_search"] = True
             result.metadata["search_query"] = query
             return result