fix(ios): reload sandbox when jsBundleSource prop changes

RCTHost is initialized with a bundleURLProvider closure that calls the
delegate's bundleURL on every reload. Trigger host reload instead of
recreating the entire factory to pick up the new bundle URL.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: CAMOBAP

packages/react-native-sandbox/ios/SandboxReactNativeViewComponentView.mm

@@ -9,6 +9,7 @@
 #import <React/RCTConversions.h>
 #import <React/RCTFabricComponentsPlugins.h>
 #import <React/RCTFollyConvert.h>
+#import <ReactCommon/RCTHost+Internal.h>
 #import <ReactCommon/RCTHost.h>
 
 #import "SandboxReactNativeDelegate.h"
@@ -74,6 +75,10 @@ - (void)updateProps:(const Props::Shared &)props oldProps:(const Props::Shared &
 
     if (oldViewProps.jsBundleSource != newViewProps.jsBundleSource) {
       [self.reactNativeDelegate setJsBundleSource:newViewProps.jsBundleSource];
+      RCTHost *host = self.reactNativeFactory.rootViewFactory.reactHost;
+      if (host) {
+        [host reload];
+      }
     }
 
     if (oldViewProps.allowedTurboModules != newViewProps.allowedTurboModules) {