feat(content): C端正文富文本渲染(HTML)

- 小程序 content-detail：<RichText nodes=body> 渲染 HTML(图片/视频/排版)，样式对齐
- 网站 Content.jsx 详情展开：dangerouslySetInnerHTML 渲染富文本

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

miniprogram/src/pages/content-detail/index.jsx

@@ -1,4 +1,4 @@
-import { View, Text, Image, Video, ScrollView, Button } from '@tarojs/components';
+import { View, Text, Image, Video, ScrollView, Button, RichText } from '@tarojs/components';
 import Taro from '@tarojs/taro';
 import { useState, useEffect } from 'react';
 import { getContent } from '@/utils/content';
@@ -45,7 +45,9 @@ export default function ContentDetail() {
       </View>
 
       {item.summary ? <Text className="cd-summary">{item.summary}</Text> : null}
-      <Text className="cd-body">{item.body || '暂无正文'}</Text>
+      {item.body
+        ? <RichText className="cd-body" nodes={item.body} />
+        : <Text className="cd-body">暂无正文</Text>}
 
       {/* 图集 */}
       {images.length > 0 && (

miniprogram/src/pages/content-detail/index.scss

@@ -9,7 +9,9 @@
 .cd-dot { font-size: 24rpx; color: #6d6d72; }
 .cd-meta-at { font-size: 24rpx; color: #7c7c80; }
 .cd-summary { display: block; margin: 20rpx 28rpx 0; font-size: 27rpx; color: #c4c2c3; line-height: 1.7; }
-.cd-body { display: block; margin: 20rpx 28rpx 0; font-size: 28rpx; color: #e4e4e6; line-height: 1.8; white-space: pre-wrap; }
+.cd-body { display: block; margin: 20rpx 28rpx 0; font-size: 28rpx; color: #e4e4e6; line-height: 1.8; }
+.cd-body img, .cd-body video { max-width: 100%; border-radius: 14rpx; }
+.cd-body p { margin: 0 0 8rpx; }
 .cd-gallery { display: flex; gap: 12rpx; margin: 24rpx 28rpx 0; white-space: nowrap; }
 .cd-gal-img { width: 240rpx; height: 240rpx; border-radius: 14rpx; flex-shrink: 0; margin-right: 12rpx; }
 .cd-link { margin: 28rpx 28rpx 0; }