- Implement crypto utilities for vault key management (Hybrid-Ansatz)
- PBKDF2 key derivation with 600k iterations
- AES-GCM encryption for vault keys and CRDT data
- Optimized Base64 conversion with Buffer/btoa fallback
- Add Sync Engine Store for server communication
- Vault key storage and retrieval
- CRDT log push/pull operations
- Supabase client integration
- Add Sync Orchestrator Store with realtime subscriptions
- Event-driven sync (push after writes)
- Supabase Realtime for instant sync
- Sync status tracking per backend
- Add haex_sync_status table for reliable sync tracking
