Function appendThread

src/features/app/hooks/useThreadRows.ts:109–117

(
        thread: ThreadSummary,
        depth: number,
        rows: ThreadRow[],
      )

      const visibleRoots = unpinnedRoots.slice(0, visibleRootCount);

      const appendThread = (
        thread: ThreadSummary,
        depth: number,
        rows: ThreadRow[],
      ) => {
        rows.push({ thread, depth });
        const children = childrenByParent.get(thread.id) ?? [];
        children.forEach((child) => appendThread(child, depth + 1, rows));
      };

      const pinnedRows: ThreadRow[] = [];
      pinnedRoots.forEach((thread) => appendThread(thread, 0, pinnedRows));