fix: use platform-specific stubs for Apple Pay and Google Pay native components

[arstiefel]

Description

Fixes a Metro bundler crash caused by codegenNativeComponent being called at module load time for platform-exclusive native components. On Android, codegenNativeComponent('BoltApplePayButton') runs during bundling even though Apple Pay is iOS-only, and Metro cannot find the Fabric component config, resulting in a hard bundler failure (the inverse applies on iOS for Google Pay).

The fix introduces platform-specific stub files: ApplePay.android.tsx returns null on Android, and GoogleWallet.ios.tsx returns null on iOS. Metro automatically resolves the correct file per platform, so the real codegenNativeComponent calls only execute on their native platform. The stubs are never rendered in practice because the parent components already guard behind Platform.OS checks. Also bumps SDK_VERSION to 0.5.2.

Testing

• Build and run on Android — confirm the Metro bundler error Could not find component config for native component no longer occurs.
• Build and run on iOS — confirm Apple Pay renders and functions correctly.
• Build and run on Android — confirm Google Pay renders and functions correctly.
• Build and run on iOS — confirm Google Pay stub does not cause any crash (guarded by Platform.OS === 'android' in GoogleWallet).
• Verify SDK_VERSION reads 0.5.2 in telemetry output.

Security Review

Important

A security review is required for every PR in this repository to comply with PCI requirements.

• I have considered and reviewed security implications of this PR and included the summary below.

Security Impact Summary

No security-sensitive changes. This PR only modifies how native UI components are resolved per platform at bundle time. It does not affect payment logic, authentication, data handling, or any external integrations.

[snyk-io]

✅ Snyk checks have passed. No issues have been found so far.

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[Copilot]

Pull request overview

Fixes Metro bundler crashes by preventing codegenNativeComponent from running at module load time for platform-exclusive (Apple Pay / Google Pay) Fabric components.

Changes:

• Replaced the cross-platform native component modules with lightweight stubs exporting a plain View.
• Added platform-specific implementations (.ios.ts / .android.ts) that contain the real codegenNativeComponent calls.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 4 comments.

File	Description
src/native/NativeGooglePayButton.ts	Converts the default module into an iOS/non-Android stub to avoid Android-only codegen at bundle time.
src/native/NativeGooglePayButton.android.ts	Adds Android-specific codegenNativeComponent implementation for the Google Pay button.
src/native/NativeApplePayButton.ts	Converts the default module into an Android/non-iOS stub to avoid iOS-only codegen at bundle time.
src/native/NativeApplePayButton.ios.ts	Adds iOS-specific codegenNativeComponent implementation for the Apple Pay button.

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[Copilot]

Pull request overview

Copilot reviewed 4 out of 5 changed files in this pull request and generated 3 comments.

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