fix(core): add React Native passkey adapter support for Account class

[anthony23991]

Add optional adapter function parameters so React Native can inject its own passkey implementations. All params are optional — zero breaking changes for existing web consumers.

What changed:

• Account.create() accepts createFn, nativeCreateFn, getFn via options
• Account.get() accepts getFn, rpId via new third param
• Account.import() accepts getFn, rpId via new second param
• PasskeyManager passes these adapters through to the underlying WebAuthn utils
• createLocalStorage() falls back to an in-memory Map when localStorage is unavailable
• PasskeyManager class is now exported from @jaw.id/core

Key design choices:

• nativeCreateFn bypasses crypto.subtle entirely (for RN), while createFn only replaces navigator.credentials.create
• Adapter types use any to avoid type conflicts between viem/ox internals and RN passkey libraries
• Bug fix: storePasskeyAccountForLogin now uses the WebAuthn credential ID param instead of the backend's to prevent encoding mismatches

Usage (future RN app):
const account = await Account.create(config, {
username: 'alice',
nativeCreateFn: rnCreatePasskey,
getFn: rnGetCredential,
});

[vercel]

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3 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
jaw-docs	Ignored		Mar 27, 2026 3:08pm
keys-jaw-id	Ignored		Mar 27, 2026 3:08pm
playground	Ignored		Mar 27, 2026 3:08pm

[linear]

ENGR-1077 rn support in Account class