Background title generation (`_run_background_title_update` and
`_run_background_title_refresh`) writes the title to the WebUI sidecar
JSON but never syncs it back to hermes-agent's `state.db`. This causes
`hermes sessions list` to show blank titles for all WebUI-originated
sessions.
The existing `sync_session_usage` path is gated by the `sync_to_insights`
setting (default: off) and executes before the background title thread
completes, so it cannot cover this case.
Fix: add `sync_session_title()` to `state_sync.py` — an unconditional
(not gated by `sync_to_insights`) title-only sync — and call it from both
title generation paths immediately after persisting the title to the
sidecar.
liuguangyong93
ae8311915b