core: fix owner display on problem & contest (#614)

packages/hydrooj/src/handler/discussion.ts

@@ -173,6 +173,7 @@ class DiscussionDetailHandler extends DiscussionHandler {
             system.get('pagination.reply'),
         );
         const uids = [
+            ...this.vnode.owner ? [this.vnode.owner] : [],
             this.ddoc.owner,
             ...drdocs.map((drdoc) => drdoc.owner),
         ];

packages/hydrooj/src/handler/problem.ts

@@ -376,6 +376,7 @@ export class ProblemDetailHandler extends ContestDetailBaseHandler {
             solutionCount: scnt,
             discussionCount: dcnt,
             tdoc: this.tdoc,
+            owner_udoc: (tid && this.tdoc.owner !== this.pdoc.owner) ? await user.getById(domainId, this.tdoc.owner) : null,
         };
         if (this.tdoc && this.tsdoc) {
             const fields = ['attend', 'startAt'];