Auto save item to save user input when not connected

Is your feature request related to a problem? Please describe.

There's an issue when creating an event in the calendar if the IP changed or network is temporary down.

The page refresh and user input disappear.

Describe the solution you'd like

There's a need to implement a serialisation of the new item to prevent user input loss

Describe alternatives you've considered

I think there's solution to save item in memory or in LocalStorage to prevent issue described, then after the page reloaded, set item back.

By example, the Note app is better implemented in case of temporary missing network.

Additional context

No response

Start by tracing the calendar event-creation flow and compare its behavior with the Note app mentioned in the issue. Review the linked localStorage documentation and determine how new event input can survive a page reload or temporary network loss. Done means unsent user input is restored without being lost when the page refreshes.