[WIP] feat: Remote control server + web UI

[quangdang46]

Gap #23 — Medium

Self-hosted remote control server for accessing agent from any device.

Source: claude-code (CCB)

What's needed:

• REST + WebSocket API server
• Environment registration and work polling with heartbeat
• Multi-session spawn modes: same-dir, worktree, single
• Web UI with session management
• Auth layer (JWT, API key, CORS)
• Bridge that connects to server, polls for work, spawns sessions in isolated worktrees

Reference: claude-code packages/remote-control-server/