fix: 会员过期时跳过 API 请求 & 限制 STOMP WebSocket 重连次数

- DynamicNewsDetailPanel: 添加会员过期判断，过期时显示续费提示
  - RelatedConceptsSection: 会员过期时跳过概念 API 请求
  - TransmissionChainAnalysis: 会员过期时跳过传导链 API 请求
  - BytedeskWidget: 限制 STOMP WebSocket 最多重连 3 次，屏蔽相关日志

src/views/EventDetail/components/TransmissionChainAnalysis.js

@@ -1,4 +1,5 @@
 import React, { useEffect, useState, useRef } from 'react';
+import { useSelector } from 'react-redux';
 import {
   Box,
   Button,
@@ -39,6 +40,7 @@ import CitedContent from '../../../components/Citation/CitedContent';
 import { logger } from '../../../utils/logger';
 import { getApiBase } from '../../../utils/apiConfig';
 import { PROFESSIONAL_COLORS } from '../../../constants/professionalTheme';
+import { selectSubscriptionInfo } from '../../../store/slices/subscriptionSlice';
 
 // 节点样式配置 - 完全复刻Flask版本
 const NODE_STYLES = {
@@ -460,6 +462,10 @@ function getSankeyOption(data) {
 }
 
 const TransmissionChainAnalysis = ({ eventId }) => {
+  // 获取订阅信息，用于判断会员是否过期
+  const subscriptionInfo = useSelector(selectSubscriptionInfo);
+  const isSubscriptionExpired = subscriptionInfo.type !== 'free' && !subscriptionInfo.is_active;
+
   // 状态管理
   const [graphData, setGraphData] = useState(null);
   const [sankeyData, setSankeyData] = useState(null);
@@ -474,7 +480,7 @@ const TransmissionChainAnalysis = ({ eventId }) => {
   const [stats, setStats] = useState({
     totalNodes: 0,
     involvedIndustries: 0,
-    relatedCompanies: 0,  
+    relatedCompanies: 0,
     positiveImpact: 0,
     negativeImpact: 0,
     circularEffect: 0
@@ -514,9 +520,18 @@ const TransmissionChainAnalysis = ({ eventId }) => {
     }
   }, [graphData]);
 
-  // 加载数据
+  // 加载数据 - 如果会员过期则跳过 API 请求
   useEffect(() => {
     async function fetchData() {
+      // 会员已过期，不发起 API 请求
+      if (isSubscriptionExpired) {
+        logger.debug('TransmissionChain', '会员已过期，跳过传导链数据加载', { eventId });
+        setLoading(false);
+        setGraphData(null);
+        setSankeyData(null);
+        return;
+      }
+
       setLoading(true);
       setError(null);
       try {
@@ -563,7 +578,7 @@ const TransmissionChainAnalysis = ({ eventId }) => {
     if (eventId) {
       fetchData();
     }
-  }, [eventId]);
+  }, [eventId, isSubscriptionExpired]);
 
   // BFS路径查找 - 完全复刻Flask版本
   function findPath(nodes, edges, fromId, toId) {