refactor(expo-native-components): remove legacy client sync bridge

[mikepitre]

Description

Stacked on #9956 (stack: main ← #9955 ← #9957 ← #9954 ← #9956 ← this PR). #9956 moved @clerk/expo to the new client sync engine, which only uses configureNative, getDeviceToken, setDeviceToken, refreshClient and the clerkNativeClientInvalidated event from #9957. This PR removes the legacy native sync path from @clerk/expo-native-components that nothing calls any more.

Removed on iOS (ClerkExpoModule.swift, ClerkNativeBridge.swift) and Android (ClerkExpoModule.kt):

• configure(publishableKey, bearerToken), getClientToken() and syncClientStateFromJs(...).
• The clerkNativeClientChanged event, with its emitter and payload builder, and the Android companion emitClientChanged.
• The client observation loop that fed that event: lastObservedClientState, jsOriginatedClientSyncDepth and the client-state snapshot/changes types. On iOS this also removes clientObservationGeneration, syncTokenState and waitForLoadedClient. On Android it removes clientStateObserverJob, emitSyncedClientChanged and the unused sharedInstance. configureNative no longer starts that loop.

Unchanged: auth-flow state and clerkNativeAuthFlowChanged, getAuthFlowState, pending callback URL handling, client invalidation, and the trusted-device / biometric reverification functions. The shared iOS event queue stays because the auth-flow and invalidation emitters still use it.

Native views:

• iOS: ClerkNativeViewHost attaches its controller once ClerkNativeBridge is configured, and retries on the clerkNativeSDKDidConfigure notification. configureNative already posts that notification when it configures or reconfigures the SDK, so views mounted before configuration still attach. The legacy configure posted it only after waiting (up to 3s) for Clerk.shared.isLoaded. configureNative posts it as soon as ClerkKit is configured, as it already did in feat(expo): simplify native client sync engine #9956. The hosted SwiftUI views observe Clerk.shared, so they update when the client loads.
• Android: no view depended on configure awaiting initialization. ClerkAuthViewModule recreates AuthView when Clerk.isInitialized flips, and the UserButton/UserProfile views collect Clerk.userFlow. Only a comment that referred to configure() changed.

No TypeScript types for the legacy methods were left in @clerk/expo or @clerk/expo-native-components. One test mock in @clerk/expo now uses configureNative instead of configure. @clerk/expo-native-components is unreleased, so this uses an empty changeset.

Checklist

• pnpm test runs as expected.
• pnpm build runs as expected.
• (If applicable) JSDoc comments have been added or updated for any package exports
• (If applicable) Documentation has been updated

Type of change

• 🐛 Bug fix
• 🌟 New feature
• 🔨 Breaking change
• 📖 Refactoring / dependency upgrade / documentation
• other:

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated
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[changeset-bot]

🦋 Changeset detected

Latest commit: 5a9f6ab

The changes in this PR will be included in the next version bump.

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