action_ping was hitting /health, which returns 200 as long as the
FastAPI app responds — even when Ollama is down, dispatch fails. So the
bot showed online while every DM errored.
Switch to /health/detailed and gate 'online' on db, master_agent and
the active LLM backend (ollama for local privacy mode, claude
otherwise) all reporting 'ok'. Anything else flips the bot to error
or offline, which propagates through _sync_bot_user_presence to a grey
dot in Discuss.
c215b9bf0c