Removes the unwatched-countdown marker (💤) added in v1.2.0.
Backgrounding Delta Chat does not kill the app — the webview keeps running and the alarm still fires at expiry. Only an OS teardown or an outright exit stops it, and neither delivers a final update, so the marker only appeared in the case where it wasn't needed.
Everything else from v1.2.0 is unchanged: notifications on start, focus completion and break completion; a minute-level chatlist summary that refreshes when the app is reopened; and the tomato counter fix.