fix: critical mobile and web bug fixes

- Fix gorhom#2642: isLayoutCalculated logic bug (|| should be &&) causing incorrect detent positions
- Fix gorhom#2498: prevent closing two modals at once by guarding splice with sheetIndex !== -1
- Fix gorhom#2342: use Math.floor on animatedIndex to fix Android freeze with reduced animations
- Fix gorhom#2595: React 19 compatibility and type safety for findNodeHandle web utility

Author: TwanLuttik

src/components/bottomSheet/BottomSheet.tsx

@@ -246,7 +246,7 @@ const BottomSheetComponent = forwardRef<BottomSheet, BottomSheetProps>(
       let isContainerHeightCalculated = false;
       //container height was provided.
       if (
-        _providedContainerHeight !== null ||
+        _providedContainerHeight !== null &&
         _providedContainerHeight !== undefined
       ) {
         isContainerHeightCalculated = true;

src/components/bottomSheetBackdrop/BottomSheetBackdrop.tsx

@@ -116,7 +116,7 @@ const BottomSheetBackdropComponent = ({
 
   //#region effects
   useAnimatedReaction(
-    () => animatedIndex.value <= disappearsOnIndex,
+    () => Math.floor(animatedIndex.value) <= disappearsOnIndex,
     (shouldDisableTouchability, previous) => {
       if (shouldDisableTouchability === previous) {
         return;

src/components/bottomSheetModalProvider/BottomSheetModalProvider.tsx

@@ -99,7 +99,9 @@ const BottomSheetModalProviderWrapper = ({
      * Here we remove the unmounted sheet and update
      * the sheets queue.
      */
-    _sheetsQueue.splice(sheetIndex, 1);
+    if (sheetIndex !== -1) {
+      _sheetsQueue.splice(sheetIndex, 1);
+    }
     sheetsQueueRef.current = _sheetsQueue;
 
     /**

src/utilities/findNodeHandle.web.ts

@@ -0,0 +1,54 @@
+import type { NodeHandle } from 'react-native';
+import {
+  findNodeHandle as _findNodeHandle,
+} from 'react-native';
+
+/**
+ * Type bridge for accessing undocumented React Native scroll component internals.
+ * These properties exist at runtime but aren't exposed in RN's public type definitions.
+ *
+ * @see https://github.com/facebook/react-native/blob/main/packages/virtualized-lists/Lists/VirtualizedList.js#L1252
+ */
+interface ScrollComponentInternals {
+  /** Available on ScrollView, FlatList, etc. to get the underlying native scroll ref */
+  getNativeScrollRef?: () => NodeHandle | null;
+  /** Internal property on VirtualizedList storing the scroll ref */
+  _scrollRef?: NodeHandle | null;
+}
+
+export function findNodeHandle(
+  componentOrHandle: Parameters<typeof _findNodeHandle>['0']
+): NodeHandle | null | typeof componentOrHandle {
+  // Early return for null/undefined (React 19 fix)
+  if (componentOrHandle == null) {
+    return null;
+  }
+
+  let nodeHandle: NodeHandle | null = null;
+
+  try {
+    nodeHandle = _findNodeHandle(componentOrHandle);
+    if (nodeHandle) {
+      return nodeHandle;
+    }
+  } catch {}
+
+  // Type bridge: componentOrHandle may have scroll internals at runtime
+  const scrollable = componentOrHandle as unknown as ScrollComponentInternals;
+
+  try {
+    if (typeof scrollable.getNativeScrollRef === 'function') {
+      nodeHandle = scrollable.getNativeScrollRef();
+      if (nodeHandle) {
+        return nodeHandle;
+      }
+    }
+  } catch {}
+
+  if (scrollable._scrollRef != null) {
+    return scrollable._scrollRef;
+  }
+
+  console.warn('could not find scrollable ref!');
+  return componentOrHandle;
+}