[botinc-agent]

Problem

The opt-in language selector added in 4.9.0 could never be enabled on iOS. The JavaScript layer and the Android bridge forward showLanguageSelector, and the iOS bridge's Swift configuration type reads it, but the Objective-C++ config dictionary that crosses into Swift never included the key. Native received no selector flag, so the welcome screen stayed as it was even when an integrator set showLanguageSelector: true.

Solution

• Forward showLanguageSelector in configDictFrom in ios/SdkReactNative.mm, matching the other DiditConfig booleans and the Android parser.
• Add native-config-forwarding.test.ts, which reads the public VerificationConfig type and both native parsers and fails when a key has no counterpart on either platform.

Verification

• New test fails on the iOS showLanguageSelector case before the fix and passes after it.
• yarn lint and yarn typecheck pass.
• yarn test --maxWorkers=2 passes: 16 suites, 142 tests.
• Native sample builds for iOS and Android could not run in this Linux sandbox (no Xcode or Android SDK); the repository's iOS/Android CI jobs remain the build check.