The TUI docs presented HERMES_TUI_GATEWAY_URL + /api/ws as a supported
'attach the TUI to a standalone running gateway' workflow. It isn't.
/api/ws exists only inside the dashboard's FastAPI server
(hermes_cli/web_server.py), which spawns its own embedded TUI child and
injects the var as an internal wiring detail. The OpenAI-compat API
server (api_server platform) deliberately does not serve /api/ws, so the
documented ws://host:port/api/ws workflow 404s — the cause of #32882 and
the two PRs (#32904, #32955) that tried to add the route to the wrong
surface.
Rewrites the section in en + zh-Hans to describe the var accurately and
point users at shared state.db / dashboard embedded chat for multi-surface
session sharing.