fix(forum): keep closed posts visible without a reload (#3309)

fluxer_app/src/features/forum/hooks/useForumPosts.ts

@@ -38,7 +38,7 @@ export function getForumPostListView(forum: Channel): ForumPostListView {
 	}
 	const list = ForumPosts.getList(forum.id, 'archived');
 	const {pinned, active, archived} = buildForumPostList({
-		active: ChannelThreads.getActiveThreadsForParent(forum.id),
+		known: ChannelThreads.getThreadsForParent(forum.id),
 		extra: resolvePosts(forum.id, list.ids),
 		sortOrder: ForumPosts.getSortOrder(forum),
 		tagIds: ForumPosts.getTagFilter(forum.id),

fluxer_app/src/features/forum/utils/ForumPostList.ts

@@ -30,7 +30,7 @@ export function matchesTagFilter(
 }
 
 export interface ForumPostListInput {
-	active: ReadonlyArray<Channel>;
+	known: ReadonlyArray<Channel>;
 	extra: ReadonlyArray<Channel>;
 	sortOrder: ForumSortOrderType;
 	tagIds: ReadonlyArray<string>;
@@ -44,7 +44,7 @@ export interface ForumPostListResult {
 }
 
 export function buildForumPostList({
-	active,
+	known,
 	extra,
 	sortOrder,
 	tagIds,
@@ -54,7 +54,7 @@ export function buildForumPostList({
 	const activePosts: Array<Channel> = [];
 	const archivedPosts: Array<Channel> = [];
 	let pinned: Channel | null = null;
-	for (const post of [...active, ...extra]) {
+	for (const post of [...known, ...extra]) {
 		if (seen.has(post.id)) continue;
 		seen.add(post.id);
 		if (!matchesTagFilter(post.appliedTags, tagIds, tagSetting)) continue;
@@ -67,5 +67,6 @@ export function buildForumPostList({
 	const byKey = (a: Channel, b: Channel) =>
 		SnowflakeUtils.compare(postSortKey(b, sortOrder), postSortKey(a, sortOrder));
 	activePosts.sort(byKey);
+	archivedPosts.sort(byKey);
 	return {pinned, active: activePosts, archived: archivedPosts};
 }