refactor: Community 目录结构重组 + 修复导入路径 + 添加 Mock 数据

## 目录重构
- DynamicNewsCard/ → DynamicNews/（含 layouts/, hooks/ 子目录）
- EventCard 原子组件 → EventCard/atoms/
- EventDetailModal 独立目录化
- HotEvents 独立目录化（含 CSS）
- SearchFilters 独立目录化（CompactSearchBox, TradingTimeFilter）

## 导入路径修复
- EventCard/*.js: 统一使用 @constants/, @utils/, @components/ 别名
- atoms/*.js: 修复移动后的相对路径问题
- DynamicNewsCard.js: 更新 contexts, store, constants 导入
- EventHeaderInfo.js, CompactMetaBar.js: 修复 EventFollowButton 导入

## Mock Handler 添加
- /api/events/:eventId/expectation-score - 事件超预期得分
- /api/index/:indexCode/realtime - 指数实时行情

## 警告修复
- CitationMark.js: overlayInnerStyle → styles (Antd 5.x)
- CitedContent.js: 移除不支持的 jsx 属性

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

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

src/views/Community/components/EventCard/atoms/ImportanceStamp.js

@@ -0,0 +1,86 @@
+// src/views/Community/components/EventCard/atoms/ImportanceStamp.js
+// 重要性印章组件
+
+import React from 'react';
+import {
+  Box,
+  Text,
+  useColorModeValue,
+} from '@chakra-ui/react';
+import { getImportanceConfig } from '@constants/importanceLevels';
+
+/**
+ * 重要性印章组件（模拟盖章效果）
+ * @param {Object} props
+ * @param {string} props.importance - 重要性等级 (S/A/B/C)
+ * @param {string} props.size - 印章尺寸 ('sm' | 'md' | 'lg')
+ */
+const ImportanceStamp = ({ importance, size = 'md' }) => {
+  const config = getImportanceConfig(importance);
+
+  // 印章颜色
+  const stampColor = useColorModeValue(config.badgeBg, config.badgeBg);
+
+  // 尺寸配置
+  const sizeConfig = {
+    sm: { outer: '40px', inner: '34px', fontSize: 'md', borderOuter: '2px', borderInner: '1.5px' },
+    md: { outer: '50px', inner: '42px', fontSize: 'xl', borderOuter: '3px', borderInner: '2px' },
+    lg: { outer: '60px', inner: '52px', fontSize: '2xl', borderOuter: '4px', borderInner: '2.5px' },
+  };
+
+  const currentSize = sizeConfig[size];
+
+  return (
+    <Box
+      position="relative"
+      display="inline-block"
+    >
+      {/* 外层圆形边框（双圈） */}
+      <Box
+        position="relative"
+        w={currentSize.outer}
+        h={currentSize.outer}
+        borderRadius="50%"
+        borderWidth={currentSize.borderOuter}
+        borderColor={stampColor}
+        display="flex"
+        alignItems="center"
+        justifyContent="center"
+        transform="rotate(-15deg)"
+        opacity={0.9}
+        boxShadow="0 3px 12px rgba(0,0,0,0.2)"
+        bg={useColorModeValue('white', 'gray.800')}
+        _hover={{
+          opacity: 1,
+          transform: "rotate(-15deg) scale(1.15)",
+          boxShadow: "0 4px 16px rgba(0,0,0,0.3)",
+        }}
+        transition="all 0.3s ease"
+      >
+        {/* 内层圆形边框 */}
+        <Box
+          position="absolute"
+          w={currentSize.inner}
+          h={currentSize.inner}
+          borderRadius="50%"
+          borderWidth={currentSize.borderInner}
+          borderColor={stampColor}
+        />
+
+        {/* 印章文字 */}
+        <Text
+          fontSize={currentSize.fontSize}
+          fontWeight="black"
+          color={stampColor}
+          fontFamily={config.stampFont}
+          letterSpacing="2px"
+          textShadow="0 0 2px currentColor"
+        >
+          {config.stampText}
+        </Text>
+      </Box>
+    </Box>
+  );
+};
+
+export default ImportanceStamp;