Null/undefined items in the Google Calendar API response caused a
TypeError on `item.status` access, silently aborting the sync while
the OAuth callback had already redirected to the success page.
- Filter null items in `upsertGoogleEvents` with an early `continue`
- Await `sync()` in the OAuth callback so errors surface as
`sync_error=google` redirects instead of false success
Resolves#92
Co-authored-by: Ulas Kalayci <ulas.kalayci@googlemail.com>
ulsklyc
19e6569281