Battery optimization release.
- Stops second-by-second timer work when the app is backgrounded
- Removes ten-minute background polling
- Uses event-driven widget and notification updates
- Keeps milestone alerts with non-waking phase refreshes
The attached APK is signed with the MyFastingApp release key and reproducibly built from commit d901e0e817ca74e67f4b352ce37de4e8261c32d0.