Fix several potential memory leaks (#5586)

src/components/story/helpers/ribbonAnimation.ts

@@ -144,6 +144,8 @@ export function animateOpening(isArchived?: boolean) {
             }
             toggleAvatar?.classList.remove('animating');
             peer.classList.remove('animating');
+
+            callbacks.delete(cb);
           });
         }, ANIMATION_DURATION + ANIMATION_END_DELAY);
 
@@ -283,6 +285,8 @@ export function animateClosing(isArchived?: boolean) {
             peer.classList.remove('animating');
             toggleAvatar!.classList.remove('animating');
           });
+
+          callbacks.delete(cb);
         }, ANIMATION_DURATION + ANIMATION_END_DELAY);
 
         callbacks.add(cb);

src/hooks/useIntersectionObserver.ts

@@ -163,6 +163,7 @@ export function useIntersectionObserver({
     function destroy() {
       callbacks.clear();
       observer.disconnect();
+      entriesAccumulator.clear();
     }
 
     controllerRef.current = {

src/lib/teact/teact.ts

@@ -722,6 +722,8 @@ function useEffectBase(
     };
   }
 
+  if (effectConfig) effectConfig.schedule = undefined; // Help GC
+
   byCursor[cursor] = {
     ...effectConfig,
     dependencies,

src/util/animateHorizontalScroll.ts

@@ -57,8 +57,17 @@ export default function animateHorizontalScroll(container: HTMLElement, left: nu
 
       const startAt = Date.now();
 
+      function cleanup() {
+        container.style.scrollSnapType = '';
+        delete container.dataset.scrollId;
+        stopById.delete(id);
+      }
+
       animate(() => {
-        if (isStopped) return false;
+        if (isStopped) {
+          cleanup();
+          return false;
+        }
 
         const t = Math.min((Date.now() - startAt) / duration, 1);
 
@@ -66,9 +75,7 @@ export default function animateHorizontalScroll(container: HTMLElement, left: nu
         container.scrollLeft = Math.round(target - currentPath);
 
         if (t >= 1) {
-          container.style.scrollSnapType = '';
+          cleanup();
-          delete container.dataset.scrollId;
-          stopById.delete(id);
           resolve();
         }