ui: better training validation output

packages/ui-default/backendlib/template.js

@@ -146,6 +146,7 @@ env.addGlobal('Math', Math);
 env.addGlobal('process', process);
 env.addGlobal('global', global);
 env.addGlobal('typeof', (o) => typeof o);
+env.addGlobal('instanceof', (a, b) => a instanceof b);
 env.addGlobal('paginate', misc.paginate);
 env.addGlobal('size', misc.size);
 env.addGlobal('utils', { status });

packages/ui-default/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.39.2",
+  "version": "4.39.3",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",

packages/ui-default/templates/error.html

@@ -12,7 +12,11 @@
     <p>{{ _('Arguments') }}:
       <ol>
       {%- for param in error.params -%}
-        <li>{{ param }}</li>
+        {% if instanceof(param, UserFacingError) %}
+          <li>{{ _(param.message).formatFromArray(param.params)}}</li>
+        {% else %}
+          <li>{{ param }}</li>
+        {% endif %}
       {%- endfor -%}
       </ol>
     </p>