添加html支持

packages/html2md/lib.ts

@@ -2,14 +2,20 @@ import 'hydrooj';
 import TurndownService from 'turndown';
 import { JSDOM } from 'jsdom';
 
-const turndownService = new TurndownService();
+const turndownService = new TurndownService({
+    headingStyle: 'atx',
+    codeBlockStyle: 'fenced',
+    bulletListMarker: '-',
+});
 
 export function convertHTML(html: string) {
     const DOM = new JSDOM(html);
     const eles = DOM.window.document.querySelectorAll('span.katex-mathml');
     eles.forEach((ele) => {
-        const MathML = ele.innerHTML;
-        ele.parentElement.replaceWith(MathML);
+        const MathML = ele.innerHTML
+            .replace(/\\{/gmi, '{')
+            .replace(/\\}/gmi, '}');
+        ele.parentElement.replaceWith(`$${MathML}$`);
     });
     return turndownService.turndown(DOM.serialize());
 }