Record Streak Freeze rules and Reminder defaults

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

docs/adr/0004-player-flow-streak-and-identity.md

@@ -25,3 +25,6 @@ Status: Accepted (2026-10-28)
 14. **No UI prototype**: the Streak is built directly in the app.
 15. **Build order**: setup/data/designs → Library → Plan editor → Player + summary → History, Streak,
     Reminders. Commit and push after each stage; check in after stages 1 and 4.
+16. **Freeze rules**: earn 1 per 7 consecutive Streak Days, hold max 2, auto-used on a missed day (❄️);
+    more missed days than Freezes resets the Streak.
+17. **Reminder defaults**: 19:00 and 22:30, each toggleable and re-timeable; exactly two slots.