Backend: identity.nostr-encrypt-nip04, identity.nostr-decrypt-nip04,
identity.nostr-encrypt-nip44, identity.nostr-decrypt-nip44 endpoints
with auto-resolve to default identity. Frontend: appLauncher routes
nip04.* and nip44.* postMessage calls to backend RPC.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>