ui: fix training_detail page expand

packages/ui-default/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.26.23",
+  "version": "4.26.24",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",

packages/ui-default/pages/training_detail.page.ts

@@ -11,7 +11,7 @@ async function handleSection(ev, type: string) {
   } else {
     await slideUp($detail, 300, { opacity: 1 }, { opacity: 0 });
   }
-  $section.addClass(`${type}d`);
+  $section.addClass(type === 'expand' ? 'expanded' : 'collapsed');
   $section.removeClass(type === 'expand' ? 'collapsed' : 'expanded');
   $section.removeClass('animating');
 }