Reminders and achievements now behave. 🔔
• Tapping a notification opens the right screen. If the app was already running in the background, the tap used to do nothing at all.
• Study reminders and daily goal reminders arrive reliably again, and keep varying instead of repeating one message.
• Achievement celebrations actually appear, and progress toward an achievement is no longer lost.
• Deleting study sets sticks. They no longer come back later.