Add remote backend connection support across server and clients

- document remote architecture and setup in `REMOTE.md` and link from README
- add server host override and WebSocket bearer-token auth support
- enable web runtime/env remote WS config and desktop remote mode without local spawn
- extend WS tests for bearer authorization path
3421049d5cJulius Marminge committed on 2/18/2026, 5:00:49 PMparentb236dcc
9 files changedLine totals unavailable