Stage 5: History, the shared daily Streak and Reminders

- Streak computed from all complete Sessions: Grace Hour (00:00-01:00
  counts for yesterday unless it is done), a Freeze per 7 Streak Days
  (max 2) spent automatically on a missed day (ADR 0006)
- Top bar flame (grey until today is done) opening a panel with current
  and longest Streak, Freezes and a month calendar; 'Day N of your
  streak' on a fresh summary
- History per Mode grouped by day, reopening each summary
- Two adjustable Reminders (19:00, 22:30) scheduled 14 days ahead with
  flutter_local_notifications, none on a done day; permission asked
  after the first complete Session or from Settings
- Settings: Reminders, the Player chime, exercise credits

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

GLOSSARY.md

@@ -100,5 +100,6 @@ per 7 consecutive Streak Days; at most 2 are held. A frozen day shows ❄️ in
 days than Freezes held resets the Streak to 0.
 
 **Reminder**:
-A local notification sent only if no complete Session exists for the current Streak Day. Two by
-default (19:00 and 22:30); each can be switched on/off and moved in Settings. No more than two.
+A local notification sent only if no complete Session exists for that day. Two by default (19:00 and
+22:30); each can be switched on/off and moved in Settings. No more than two. Android may deliver one up
+to about an hour late (see docs/adr/0006).