Remote sessions failed to reconnect after page refresh because
restoreState() and renderSheetList() didn't pass remoteId to
openSession(). Fix:
- state.py: add active_remote_id field to empty_state()
- main.py: extend StatePatch model to accept active_session and
active_remote_id; update PATCH /api/state to selectively update
only fields explicitly provided (using model_fields_set)
- app.js restoreState(): read state.active_remote_id and pass it
as remoteId option so page-refresh reconnects remote sessions
- app.js openSession(): fire-and-forget PATCH /api/state to persist
active_session + active_remote_id after successful connect
- app.js closeSession(): fire-and-forget PATCH /api/state to clear
both fields so refresh doesn't try to reopen a closed session
- app.js renderSheetList(): add data-remote-id to sheet items and
pass remoteId in click handler (previously called openSession(name)
with no remoteId, routing remote sessions to local 404 endpoint)
Fixes: POST /api/sessions/paperclip-adapter/connect 404 when clicking
a remote session from the mobile bottom sheet or after page refresh.
Brian Krabach