feat: 提取VerticalModeLayout - 提升可读性，但耦合度中等

src/views/Community/components/DynamicNewsCard/EventScrollList.js

@@ -5,19 +5,13 @@ import React, { useRef } from 'react';
 import {
   Box,
   Flex,
-  Grid,
-  GridItem,
-  Center,
-  VStack,
-  Text,
   useColorModeValue
 } from '@chakra-ui/react';
-import HorizontalDynamicNewsEventCard from '../EventCard/HorizontalDynamicNewsEventCard';
-import DynamicNewsDetailPanel from '../DynamicNewsDetail';
 import PaginationControl from './PaginationControl';
 import VirtualizedFourRowGrid from './VirtualizedFourRowGrid';
 import PageNavigationButton from './PageNavigationButton';
 import ModeToggleButtons from './ModeToggleButtons';
+import VerticalModeLayout from './VerticalModeLayout';
 
 /**
  * 事件列表组件 - 支持纵向和平铺两种展示模式
@@ -166,68 +160,25 @@ const EventScrollList = ({
           />
         )}
 
-        {/* 模式4: 纵向分栏模式 - 横向布局（时间在左，卡片在右） */}
+        {/* 纵向分栏模式 */}
         {mode === 'vertical' && (
-          <Grid templateColumns="1fr 2fr" gap={6} h="800px">
-            {/* 左侧：事件列表 (33.3%) - 使用虚拟滚动 + 双向无限滚动 */}
-            <GridItem>
-              <VirtualizedFourRowGrid
-                events={displayEvents || events}  // 使用累积列表
-                columnsPerRow={1}  // 单列布局
-                CardComponent={HorizontalDynamicNewsEventCard}  // 使用横向卡片
+          <VerticalModeLayout
+            displayEvents={displayEvents}
+            events={events}
             selectedEvent={selectedEvent}
             onEventSelect={onEventSelect}
             eventFollowStatus={eventFollowStatus}
             onToggleFollow={onToggleFollow}
             getTimelineBoxStyle={getTimelineBoxStyle}
             borderColor={borderColor}
-                loadNextPage={loadNextPage}  // 支持向下无限滚动
-                loadPrevPage={loadPrevPage}  // 支持向上无限滚动（双向滚动）
+            loadNextPage={loadNextPage}
+            loadPrevPage={loadPrevPage}
             hasMore={hasMore}
             loading={loading}
+            scrollbarTrackBg={scrollbarTrackBg}
+            scrollbarThumbBg={scrollbarThumbBg}
+            scrollbarThumbHoverBg={scrollbarThumbHoverBg}
           />
-            </GridItem>
-
-            {/* 右侧：事件详情 (66.7%) */}
-            <GridItem h="100%">
-              <Box
-                pl={2}
-                position="relative"
-                sx={{
-                  height: '100% !important',
-                  maxHeight: '800px !important',
-                  overflowY: 'scroll !important',
-                  overflowX: 'hidden !important',
-                  '&::-webkit-scrollbar': {
-                    width: '3px',
-                  },
-                  '&::-webkit-scrollbar-track': {
-                    background: scrollbarTrackBg,
-                    borderRadius: '10px',
-                  },
-                  '&::-webkit-scrollbar-thumb': {
-                    background: scrollbarThumbBg,
-                    borderRadius: '10px',
-                  },
-                  '&::-webkit-scrollbar-thumb:hover': {
-                    background: scrollbarThumbHoverBg,
-                  },
-                }}
-              >
-                {selectedEvent ? (
-                  <DynamicNewsDetailPanel event={selectedEvent} />
-                ) : (
-                  <Center h="100%" minH="400px">
-                    <VStack spacing={4}>
-                      <Text fontSize="lg" color="gray.500">
-                        请选择左侧事件查看详情
-                      </Text>
-                    </VStack>
-                  </Center>
-                )}
-              </Box>
-            </GridItem>
-          </Grid>
         )}
       </Box>
       </Box>