feat(EventList): 功能增强 - 集成NotificationContext和添加动画

**主要变更**：

1. **集成NotificationContext**：
   - 引入 useNotification hook，替代本地通知权限状态
   - 删除本地 notificationPermission 状态和 useEffect
   - 使用 browserPermission 和 requestBrowserPermission
   - 添加 handlePushToggle 函数处理推送开关切换

2. **添加动画支持**：
   - 从 @emotion/react 引入 keyframes
   - 定义 pulseAnimation 脉冲动画（用于S/A级重要性标签）

3. **添加描述展开状态**：
   - 新增 expandedDescriptions 状态管理

**效果**：
- 推送权限管理更集中统一
- 支持动画效果增强视觉体验
- 为后续UI优化做准备

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/views/Community/components/EventList.js

@@ -1,5 +1,6 @@
 // src/views/Community/components/EventList.js
 import React, { useState, useEffect } from 'react';
+import { keyframes } from '@emotion/react';
 import {
     Box,
     VStack,
@@ -57,6 +58,21 @@ import { getApiBase } from '../../../utils/apiConfig';
 import { useEventNotifications } from '../../../hooks/useEventNotifications';
 import { getImportanceConfig, getAllImportanceLevels } from '../../../constants/importanceLevels';
 import { browserNotificationService } from '../../../services/browserNotificationService';
+import { useNotification } from '../../../contexts/NotificationContext';
+
+// ========== 动画定义 ==========
+// 脉冲动画 - 用于S/A级重要性标签
+const pulseAnimation = keyframes`
+  0% {
+    box-shadow: 0 0 0 0 rgba(255, 77, 79, 0.7);
+  }
+  70% {
+    box-shadow: 0 0 0 10px rgba(255, 77, 79, 0);
+  }
+  100% {
+    box-shadow: 0 0 0 0 rgba(255, 77, 79, 0);
+  }
+`;
 
 // ========== 工具函数定义在组件外部 ==========
 // 涨跌颜色配置（中国A股配色：红涨绿跌）- 分档次显示
@@ -137,19 +153,10 @@ const EventList = ({ events, pagination, onPageChange, onEventClick, onViewDetai
     const [followingMap, setFollowingMap] = useState({});
     const [followCountMap, setFollowCountMap] = useState({});
     const [localEvents, setLocalEvents] = useState(events); // 用于实时更新的本地事件列表
-    const [notificationPermission, setNotificationPermission] = useState('default');
+    const [expandedDescriptions, setExpandedDescriptions] = useState({}); // 描述展开状态映射
 
-    // 请求浏览器通知权限
-    useEffect(() => {
-        const requestPermission = async () => {
-            if (browserNotificationService.isSupported()) {
-                const permission = await browserNotificationService.requestPermission();
-                setNotificationPermission(permission);
-                logger.info('EventList', '浏览器通知权限状态', { permission });
-            }
-        };
-        requestPermission();
-    }, []);
+    // 从 NotificationContext 获取推送权限相关状态和方法
+    const { browserPermission, requestBrowserPermission } = useNotification();
 
     // 实时事件推送集成
     const { isConnected } = useEventNotifications({
@@ -178,9 +185,8 @@ const EventList = ({ events, pagination, onPageChange, onEventClick, onViewDetai
 
             // 发送浏览器原生通知
             console.log('[EventList DEBUG] 准备发送浏览器原生通知');
-            const currentPermission = browserNotificationService.getPermissionStatus();
-            console.log('[EventList DEBUG] 通知权限状态:', currentPermission);
-            if (currentPermission === 'granted') {
+            console.log('[EventList DEBUG] 通知权限状态:', browserPermission);
+            if (browserPermission === 'granted') {
                 const importance = getImportanceConfig(event.importance);
                 const notification = browserNotificationService.sendNotification({
                     title: `🔔 ${importance.label}级事件`,
@@ -288,6 +294,43 @@ const EventList = ({ events, pagination, onPageChange, onEventClick, onViewDetai
         }
     };
 
+    // 处理推送开关切换
+    const handlePushToggle = async (e) => {
+        const isChecked = e.target.checked;
+
+        if (isChecked) {
+            // 用户想开启推送
+            logger.info('EventList', '用户请求开启推送');
+            const permission = await requestBrowserPermission();
+
+            if (permission === 'denied') {
+                // 权限被拒绝，显示设置指引
+                logger.warn('EventList', '用户拒绝了推送权限');
+                toast({
+                    title: '推送权限被拒绝',
+                    description: '如需开启推送，请在浏览器设置中允许通知权限',
+                    status: 'warning',
+                    duration: 5000,
+                    isClosable: true,
+                    position: 'top',
+                });
+            } else if (permission === 'granted') {
+                logger.info('EventList', '推送权限已授予');
+            }
+        } else {
+            // 用户想关闭推送 - 提示需在浏览器设置中操作
+            logger.info('EventList', '用户尝试关闭推送');
+            toast({
+                title: '关闭推送通知',
+                description: '如需关闭，请在浏览器设置中撤销通知权限',
+                status: 'info',
+                duration: 5000,
+                isClosable: true,
+                position: 'top',
+            });
+        }
+    };
+
     // 专业的金融配色方案
     const bgColor = useColorModeValue('gray.50', 'gray.900');
     const cardBg = useColorModeValue('white', 'gray.800');