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>

lib/src/player/views/summary_view.dart

@@ -8,17 +8,23 @@ import '../../localization/app_localizations.dart';
 import '../../modes/mode.dart';
 import '../../plans/models/plan.dart';
 import '../../plans/plan_labels.dart';
+import '../../streak/streak.dart';
+import '../../streak/views/streak_views.dart';
 import '../session_runner.dart';
 
 /// Shown when a Session ends: how long it took, what was done and, for
 /// Workouts, every logged set.
 class SummaryView extends StatelessWidget {
-  const SummaryView({super.key, required this.sessionId});
+  const SummaryView({super.key, required this.sessionId, this.justFinished = false});
 
   static const routeName = '/summary';
 
   final String sessionId;
 
+  /// Straight from the Player rather than opened again from History: only
+  /// then is the Session's Streak Day worth pointing out.
+  final bool justFinished;
+
   @override
   Widget build(BuildContext context) {
     final l10n = AppLocalizations.of(context);
@@ -50,6 +56,7 @@ class SummaryView extends StatelessWidget {
                 Text(session.complete ? l10n.summaryComplete : l10n.summaryIncomplete, style: text.headlineLarge),
                 const SizedBox(height: 4),
                 Text(session.planName, style: text.titleMedium?.copyWith(color: s.inkMuted)),
+                if (justFinished && session.complete) _StreakLine(session: session),
                 const SizedBox(height: 28),
                 Row(
                   children: [
@@ -100,6 +107,53 @@ class SummaryView extends StatelessWidget {
   }
 }
 
+/// "Day 12 of your streak", when this Session was the first to complete its day.
+class _StreakLine extends StatelessWidget {
+  const _StreakLine({required this.session});
+
+  final Session session;
+
+  @override
+  Widget build(BuildContext context) {
+    final l10n = AppLocalizations.of(context);
+    final s = ZenStyle.of(context);
+    final sessions = context.read<SessionRepository>();
+    return StreakBuilder(
+      builder: (context, streak) => FutureBuilder(
+        future: sessions.completeEndTimes(),
+        builder: (context, snapshot) {
+          final times = snapshot.data;
+          if (times == null) return const SizedBox.shrink();
+          final before = streakDays(times.where((t) => t != session.endedAt));
+          final fresh = streakDays(times).length > before.length;
+          if (!fresh || streak.current == 0) return const SizedBox.shrink();
+          return Padding(
+            padding: const EdgeInsets.only(top: 12),
+            child: Row(
+              children: [
+                Icon(Icons.local_fire_department_rounded, color: s.accent),
+                const SizedBox(width: 6),
+                Text(
+                  l10n.summaryStreak(streak.current),
+                  style: Theme.of(context).textTheme.titleMedium?.copyWith(color: s.accent),
+                ),
+              ],
+            ),
+          );
+        },
+      ),
+    );
+  }
+}
+
+/// What the summary route takes.
+class SummaryArguments {
+  const SummaryArguments(this.sessionId, {this.justFinished = false});
+
+  final String sessionId;
+  final bool justFinished;
+}
+
 class _Stat extends StatelessWidget {
   const _Stat({required this.label, required this.value});