[Feature] E2E: Verify syncMemoryClientToken on login

[graycyrus]

Summary

Add E2E test verifying that syncMemoryClientToken fires on login and initializes the memory client.

Problem

syncMemoryClientToken() is called in App.tsx PersistGate onBeforeLift. No E2E test verifies this init flow fires with the user's token after authentication.

Acceptance criteria

• E2E spec — After login, verify openhuman.memory_init RPC was called
• Token passed — Verify the JWT token is included in the init call

Related

Parent: #190
File: app/src/utils/tauriCommands.ts