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>

test/views/streak_and_history_test.dart

@@ -0,0 +1,114 @@
+import 'package:clock/clock.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:zenxercise/src/history/session_repository.dart';
+import 'package:zenxercise/src/modes/mode.dart';
+import 'package:zenxercise/src/plans/models/plan.dart';
+import 'package:zenxercise/src/plans/plan_repository.dart';
+import 'package:zenxercise/src/player/session_runner.dart';
+
+import '../support/test_app.dart';
+import '../support/test_database.dart';
+
+/// Noon, so the Grace Hour never shifts what counts as today.
+final noon = DateTime(2026, 10, 29, 12);
+
+void main() {
+  late PlanRepository plans;
+  late SessionRepository sessions;
+  late FakeNotifier notifier;
+
+  setUp(() {
+    final db = testDatabase();
+    addTearDown(db.close);
+    plans = PlanRepository(db);
+    sessions = SessionRepository(db);
+    notifier = FakeNotifier();
+  });
+
+  Plan plan(Mode mode) => Plan(
+    id: 'p1',
+    mode: mode,
+    name: 'Legs',
+    items: const [WorkoutStep(exerciseId: 'Barbell_Squat', sets: 1, target: WorkoutTarget.reps(10))],
+    createdAt: DateTime(2026),
+    updatedAt: DateTime(2026),
+  );
+
+  Future<void> finished(WidgetTester tester, Mode mode, DateTime end, {bool complete = true}) async => tester.runAsync(
+    () => sessions.save(
+      SessionResult(
+        plan: plan(mode),
+        startedAt: end.subtract(const Duration(minutes: 20)),
+        endedAt: end,
+        duration: const Duration(minutes: 20),
+        complete: complete,
+        setLogs: const [SetLog(exerciseId: 'Barbell_Squat', set: 1, reps: 10)],
+      ),
+    ),
+  );
+
+  /// Lets drift's streams deliver (they need real time), then settles.
+  Future<void> settle(WidgetTester tester) async {
+    await tester.runAsync(() => Future<void>.delayed(const Duration(milliseconds: 50)));
+    await tester.pumpAndSettle();
+  }
+
+  testWidgets('the flame counts finished days across both Modes and opens the Streak panel', (tester) async {
+    await withClock(Clock.fixed(noon), () async {
+      await finished(tester, Mode.workout, noon.subtract(const Duration(days: 1)));
+      await finished(tester, Mode.stretching, noon);
+      usePhoneScreen(tester);
+      await pumpApp(tester, plans: plans, sessions: sessions, notifier: notifier);
+      await settle(tester);
+
+      expect(find.descendant(of: find.byTooltip('Streak'), matching: find.text('2')), findsOneWidget);
+
+      await tester.tap(find.byTooltip('Streak'));
+      await settle(tester);
+
+      expect(find.text('2-day streak'), findsOneWidget);
+      expect(find.text('Today is done.'), findsOneWidget);
+      expect(find.text('Freezes: 0 of 2'), findsOneWidget);
+    });
+  });
+
+  testWidgets('History lists the Mode\'s Sessions by day and reopens a summary', (tester) async {
+    await withClock(Clock.fixed(noon), () async {
+      await finished(tester, Mode.workout, noon, complete: false);
+      await finished(tester, Mode.stretching, noon);
+      usePhoneScreen(tester);
+      await pumpApp(tester, plans: plans, sessions: sessions, prefs: {'mode': 'workout'});
+      await tester.tap(find.byTooltip('History'));
+      await settle(tester);
+
+      expect(find.text('Today'), findsOneWidget);
+      expect(find.text('Legs'), findsOneWidget);
+      expect(find.text('Ended early'), findsOneWidget);
+
+      await tester.tap(find.text('Legs'));
+      await settle(tester);
+
+      expect(find.text('Set 1 · 10 reps'), findsOneWidget);
+    });
+  });
+
+  testWidgets('switching a Reminder off in Settings drops its notifications', (tester) async {
+    await withClock(Clock.fixed(noon), () async {
+      usePhoneScreen(tester);
+      await pumpApp(tester, plans: plans, sessions: sessions, notifier: notifier);
+      await tester.tap(find.byTooltip('Settings'));
+      await tester.pumpAndSettle();
+
+      expect(find.text('19:00'), findsOneWidget);
+      expect(find.text('22:30'), findsOneWidget);
+
+      await tester.tap(find.byType(Switch).at(1));
+      await settle(tester);
+
+      expect(notifier.permissionRequests, 0);
+      expect(notifier.scheduled, isNotEmpty);
+      expect(notifier.scheduled.every((r) => r.$1.hour == 19), isTrue);
+    });
+  });
+}