fix: stream actions not working

Multiple sheets compete with each other and cause silent failure on ios.

js/mobile/src/components/BottomSheet.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useState } from "react";
+import { useCallback, useEffect, useRef, useState } from "react";
 import {
   Dimensions,
   KeyboardAvoidingView,
@@ -30,6 +30,13 @@ const ANIMATION_MS = 240;
 interface BottomSheetProps {
   open: boolean;
   onClose: () => void;
+  /**
+   * Fires after the close animation completes and the underlying Modal has
+   * unmounted. Use this to chain a follow-up sheet/Alert without stacking
+   * iOS Modals — presenting a second Modal while another is still mounted
+   * silently fails on iOS and leaves the app looking frozen.
+   */
+  onClosed?: () => void;
   /** When true, wrap content in KeyboardAvoidingView so the sheet floats above the keyboard. */
   avoidKeyboard?: boolean;
   /**
@@ -49,6 +56,7 @@ interface BottomSheetProps {
 export function BottomSheet({
   open,
   onClose,
+  onClosed,
   avoidKeyboard = false,
   maxHeight = "85%",
   children,
@@ -58,6 +66,18 @@ export function BottomSheet({
   const [mounted, setMounted] = useState(false);
   const translateY = useSharedValue(SCREEN_HEIGHT);
 
+  // Latest onClosed in a ref so the worklet→JS bridge always invokes the
+  // current callback even if the parent re-rendered with a new closure.
+  const onClosedRef = useRef(onClosed);
+  useEffect(() => {
+    onClosedRef.current = onClosed;
+  }, [onClosed]);
+
+  const handleClosed = useCallback(() => {
+    setMounted(false);
+    onClosedRef.current?.();
+  }, []);
+
   useEffect(() => {
     if (open) {
       setMounted(true);
@@ -73,7 +93,7 @@ export function BottomSheet({
         SCREEN_HEIGHT,
         { duration: ANIMATION_MS, easing: Easing.in(Easing.cubic) },
         (finished) => {
-          if (finished) runOnJS(setMounted)(false);
+          if (finished) runOnJS(handleClosed)();
         },
       );
     }