core: fix bugs (#702)

packages/hydrooj/src/handler/problem.ts

@@ -489,19 +489,12 @@ export class ProblemSubmitHandler extends ProblemDetailHandler {
         const langRange = (typeof this.pdoc.config === 'object' && this.pdoc.config.langs)
             ? Object.fromEntries(this.pdoc.config.langs.map((i) => [i, setting.langs[i]?.display || i]))
             : setting.SETTINGS_BY_KEY.codeLang.range;
-        this.response.body = {
-            langRange,
-            pdoc: this.pdoc,
-            udoc: this.udoc,
-            tdoc: this.tdoc,
-            tsdoc: this.tsdoc,
-            title: this.pdoc.title,
-            page_name: this.tdoc
-                ? this.tdoc.rule === 'homework'
-                    ? 'homework_detail_problem_submit'
-                    : 'contest_detail_problem_submit'
-                : 'problem_submit',
-        };
+        this.response.body.langRange = langRange;
+        this.response.body.page_name = this.tdoc
+            ? this.tdoc.rule === 'homework'
+                ? 'homework_detail_problem_submit'
+                : 'contest_detail_problem_submit'
+            : 'problem_submit';
     }
 
     @param('lang', Types.Name)