FR: Offline support

[mrtncode]

Offline/ caching support for the most important things like calendar events would be great. There are many situations where the calendar would be important but there is no internet connection :)

Read only would be enough

[ulsklyc]

This is now implemented and shipped in v0.78.8 🎉

Read-only offline support is live: the service worker now caches your last-seen data for the calendar, tasks, shopping, contacts, and dashboard, so they stay viewable without a connection. The calendar shows a subtle "Offline – as of: {time}" banner when it's serving cached data.

Details:

• Network-first for a read-only GET whitelist — you always get fresh data when online, and the last cached copy when offline.
• Mutations (creating/editing) aren't possible offline by design and now show a clear message instead of failing silently.
• The offline cache is wiped on logout/session end (safe on shared devices) and refreshes automatically on each app update.

Release: https://github.com/ulsklyc/yuvomi/releases/tag/v0.78.8

Thanks for the suggestion!