feat(mp): 文章详情页改用 mp-html 原生富文本组件

- 引入 mp-html 替代 RichText，支持图文混排、表格等复杂内容
- 新建 RichArticle 组件封装 sanitizeHtml + mp-html
- 通过 native-components 拷贝原生组件到 dist
- 优化文章排版样式（字号、间距、分隔线、底栏安全区）
- sanitize-html 扩展允许 style/data-w-e-type 属性

apps/miniprogram/src/components/RichArticle/index.tsx

@@ -0,0 +1,32 @@
+import { memo, useMemo } from 'react';
+import { View } from '@tarojs/components';
+import { sanitizeHtml } from '@/utils/sanitize-html';
+
+interface RichArticleProps {
+  html: string;
+  className?: string;
+}
+
+function prepareHtml(raw: string): string {
+  return sanitizeHtml(raw);
+}
+
+function RichArticle({ html, className }: RichArticleProps) {
+  const content = useMemo(() => prepareHtml(html), [html]);
+
+  if (!content) return null;
+
+  return (
+    <View className={className}>
+      <mp-html
+        content={content}
+        lazy-load
+        selectable
+        container-style="font-size:16px;color:#5A554F;line-height:1.8;word-break:break-word"
+        tag-style='{"img":"max-width:100%;border-radius:8px;margin:12px auto;display:block","a":"color:#C4623A;text-decoration:none"}'
+      />
+    </View>
+  );
+}
+
+export default memo(RichArticle);