The desktop app spawns `hermes serve --ws-only` instead of `hermes serve`.
The slim server (tui_gateway/entry_ws.py) uses the bare websockets library
to call handle_ws directly — same dispatch surface, same 158 RPCs, same
events, zero HTTP framework. tui_gateway.server has zero FastAPI imports;
the slim server never touches web_server.py (19.8K lines) at all.
Full backward compat: older runtimes strip --ws-only and fall back to
regular serve (still headless, just through uvicorn).
kshitijk4poor
434ea57eb0