e6710eb19f
- Created sync client for communicating with API server - Implemented conflict resolution strategies (last-write-wins, server-wins, client-wins) - Added offline change queue for queuing changes when server is unreachable - Implemented merge logic for local and remote task lists - Added conflict logging to sync_conflicts.log - Created bidirectional sync with pull/push operations - Extended Config struct with sync settings (URL, API key, client ID, strategy, offline queue) - Added SyncResult display with user-friendly output - Sync handlers already implemented in Phase 1 (GetChanges, PushChanges)