fix(scatterlab): make StatusBar.currentHeight a lazy getter

As a class field the native constant is read while the module is being loaded. Under the
New Architecture the TurboModule constants are only valid once the module instance
exists, so on Android that read fails during startup and takes the app down with

    TypeError: Cannot read property 'HEIGHT' of undefined

`import {StatusBar} from 'react-native'` alone is enough to trigger it — that is how
@react-navigation/native-stack uses it, so an app crashes before its first screen even
though it never touches StatusBar itself. Upstream closed the same report as not planned
(react#41663).

A getter defers the read to the point where the value is used. The JS spec wrapper does
not cache a failed lookup, so a later read still returns the real height.

Author: kdwkr

.github/scatterlab/allowed-tarball-diff.txt

@@ -11,3 +11,13 @@ scripts/cocoapods/rndependencies.rb
 Libraries/Text/TextInput/Multiline/RCTUITextView.mm
 Libraries/Text/TextInput/Singleline/RCTUITextField.mm
 React/Fabric/Mounting/ComponentViews/TextInput/RCTTextInputComponentView.mm
+
+# `StatusBar.currentHeight` as a lazy getter instead of a class field, see
+# https://github.com/react/react-native/issues/41663. Under the New Architecture the
+# TurboModule constants are only valid once the module instance exists, so evaluating
+# them while this module is being loaded crashes the app on Android - and `import
+# {StatusBar} from 'react-native'` alone is enough to trigger it (that is how
+# @react-navigation/native-stack uses it). The .d.ts is generated from the Flow source
+# at build time, so it differs as well.
+Libraries/Components/StatusBar/StatusBar.js
+types_generated/Libraries/Components/StatusBar/StatusBar.d.ts

packages/react-native/Libraries/Components/StatusBar/StatusBar.js

@@ -249,10 +249,21 @@ class StatusBar extends React.Component<StatusBarProps> {
    *
    * @platform android
    */
-  static currentHeight: ?number =
-    Platform.OS === 'android'
-      ? NativeStatusBarManagerAndroid.getConstants().HEIGHT
+  // A class field would read the native constant while this module is being loaded.
+  // Under the New Architecture the TurboModule constants are only valid once the module
+  // instance exists, so that read crashes the app on Android during startup — and
+  // `import {StatusBar} from 'react-native'` alone is enough to trigger it (that is how
+  // @react-navigation/native-stack uses it). See
+  // https://github.com/react/react-native/issues/41663.
+  //
+  // As a getter this is evaluated when the value is actually read. The JS spec wrapper
+  // does not cache a failed lookup, so a later read still returns the real height; the
+  // optional chaining covers callers that read in between.
+  static get currentHeight(): ?number {
+    return Platform.OS === 'android'
+      ? NativeStatusBarManagerAndroid.getConstants()?.HEIGHT
       : null;
+  }
 
   // Provide an imperative API as static functions of the component.
   // See the corresponding prop for more detail.

packages/react-native/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@scatterlab/react-native",
   "name": "@scatterlab/react-native",
-  "version": "0.87.0-scatterlab.0",
+  "version": "0.87.0-scatterlab.1",
   "description": "A framework for building native apps using React",
   "license": "MIT",
   "publishConfig": {