When opening Proton Calendar on Android, please show the locally cached calendar right away instead of displaying a blocking modal loading spinner for 20–40 seconds while syncing.
The majority of events are already in the local cache. Syncing should happen silently in the background without preventing users from viewing and editing the calendar immediately.

Expected behavior:
Instant display of cached data on app launch
Non-blocking background sync
Subtle “Syncing…” indicator if needed

This would make the app feel much faster and more responsive, especially when offline or on slower connections.