This is something I may look into as part of my Institutional module: New Institutional Module: Is it time? - #39 by sjpadgett
I currently have a protection for short term workflow changes during outage:
Downtime mode runs a Service Worker that caches a facility snapshot to IndexedDB. If the network drops, nurses continue entering arrivals, vitals, and status notes into a browser-side write queue. On reconnect, the sync endpoint replays the queue in order.