calcurse: sync with Google Calendar via calcurse-caldav

Hourly timer started from xmonad, plus UI hooks that sync before load and after exit. calcurse-sync notifies once when the OAuth login expires and restarts the daemon after imports, since it never re-reads its files.

.config/systemd/user/calcurse-sync.timer

@@ -0,0 +1,7 @@
+[Unit]
+Description=Sync calcurse with Google Calendar hourly
+
+[Timer]
+OnActiveSec=1min
+OnCalendar=hourly
+Persistent=true