Closed streams grow unbounded as teams age and can reach 1000s of items,
while open streams stay bounded by active work. Switch the streams list
to subscribe per-status so each tab only pulls what it renders, and cap
the closed tab to a 50-item window that grows via a Load more action.
The open tab remains unbounded so per-row realtime features — autoplay,
huddle indicators — keep full coverage of the streams that matter.
Closed streams are archived and don't need push behavior, which side-
steps the autoplay baseline-reset and huddle-on-page-2 risks that made
pagination complicated for the open tab.
Refs flowy-live/llink#138.
Claude