paginate for open and closed streams

js/desktop/src/hooks/use-stream-particles.ts

@@ -10,8 +10,8 @@ export type StreamParticle = Particle & {
   properties: StreamProperties;
 };
 
-const CLOSED_INITIAL_PAGE_SIZE = 50;
-const CLOSED_PAGE_INCREMENT = 50;
+const INITIAL_PAGE_SIZE = 3;
+const PAGE_INCREMENT = 3;
 
 // Stable where-constraint references so the Firestore subscription only
 // re-attaches when the tab actually changes, not on every render.
@@ -33,6 +33,7 @@ interface UseStreamParticlesOptions {
    * by active work — full realtime coverage is needed for autoplay/huddles).
    * Closed streams are paginated via `loadMore`.
    */
+  // TODO: can't we paginate open streams, and if the top set changes then our auto-play would still trigger?
   status: 'open' | 'closed';
 }
 
@@ -54,21 +55,10 @@ export function useStreamParticles(
   const user = useAuthStore((s) => s.user);
   const visibilityScopes = useVisibilityScopes(user?.id, networkId);
 
-  const [closedLimit, setClosedLimit] = useState(CLOSED_INITIAL_PAGE_SIZE);
-  const [prevStatus, setPrevStatus] = useState(status);
-
-  // Switching back to the closed tab starts a fresh window, avoiding an
-  // ever-growing subscription across a long session.
-  if (status !== prevStatus) {
-    setPrevStatus(status);
-    if (status === 'closed') {
-      setClosedLimit(CLOSED_INITIAL_PAGE_SIZE);
-    }
-  }
+  const [limit, setLimit] = useState(INITIAL_PAGE_SIZE);
 
   const whereFilter: QueryFieldFilterConstraint =
     status === 'open' ? OPEN_STATUS_FILTER : CLOSED_STATUS_FILTER;
-  const limit = status === 'closed' ? closedLimit : undefined;
 
   const { children, isLoading } = useLiveParticleChildren(path, {
     orderByField: 'last_child_created_at',
@@ -85,12 +75,11 @@ export function useStreamParticles(
 
   // Heuristic: if we got back as many items as we asked for, assume there
   // might be more. Clicking load-more when there are no more is a no-op.
-  const canLoadMore = status === 'closed' && streams.length >= closedLimit;
+  const canLoadMore = streams.length >= limit;
 
   const loadMore = useCallback(() => {
-    if (status !== 'closed') return;
-    setClosedLimit((prev) => prev + CLOSED_PAGE_INCREMENT);
-  }, [status]);
+    setLimit((prev) => prev + PAGE_INCREMENT);
+  }, []);
 
   return { streams, isLoading, networkId, canLoadMore, loadMore };
 }