resolve_session() is a no-op in local mode — no behavior change for existing users.
In cloud mode, injects user-scoped db_path into st.session_state at page load.
- Settings → Search: add-title (＋) and Import buttons crashed with
StreamlitAPIException when writing to _sp_titles_multi after it was
already instantiated. Fix: pending-key pattern (_sp_titles_pending /
_sp_locs_pending) applied before widget renders on next pass.
- Home setup banners: fired for email/notion/keywords even when those
features were already configured. Add 'done' condition callables
(_email_configured, _notion_configured, _keywords_configured) to
suppress banners automatically when config files are present.
- Services tab start/stop buttons: docker CLI was unavailable inside
the container so _docker_available was False and buttons never showed.
Bind-mount host /usr/bin/docker (ro) + /var/run/docker.sock into the
app container so it can control sibling containers via DooD pattern.
