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/utils/sanitize-html.ts

@@ -11,11 +11,12 @@ const ALLOWED_TAGS = new Set([
 ]);
 
 const ALLOWED_ATTRS: Record<string, Set<string>> = {
-  '*': new Set(['class']),
+  '*': new Set(['class', 'style', 'data-w-e-type']),
   a: new Set(['href', 'title']),
   img: new Set(['src', 'alt', 'width', 'height']),
   td: new Set(['colspan', 'rowspan']),
   th: new Set(['colspan', 'rowspan']),
+  span: new Set(['style']),
 };
 
 const URL_ATTRS = new Set(['href', 'src']);