feat(WatchSidebar): 恢复评论模块，添加 Tab 切换

- 在关注事件面板添加"我的评论" Tab
 - 新增 MyCommentsTab 组件显示用户评论
 - 评论显示：内容、关联事件、点赞/回复数、时间
 - 更新类型定义支持评论数据传递

src/views/Center/Center.tsx

@@ -246,7 +246,7 @@ const CenterDashboard: React.FC = () => {
 
           {/* 右侧固定宽度侧边栏 */}
           <Box
-            w={{ base: '100%', md: '200px' }}
+            w={{ base: '100%', md: '300px' }}
             flexShrink={0}
             display={{ base: 'none', md: 'block' }}
             position="sticky"
@@ -267,8 +267,10 @@ const CenterDashboard: React.FC = () => {
               watchlist={watchlist}
               realtimeQuotes={realtimeQuotes}
               followingEvents={followingEvents}
+              eventComments={eventComments}
               onStockClick={(stock: WatchlistItem) => navigate(`/company/${stock.stock_code}`)}
               onEventClick={(event: FollowingEvent) => navigate(getEventDetailUrl(event.id))}
+              onCommentClick={(comment: EventComment) => navigate(getEventDetailUrl(comment.event_id))}
               onAddStock={() => navigate('/stocks')}
               onAddEvent={() => navigate('/community')}
             />