Merge branch 'train-days' into integration

# Conflicts:
#	apps/train/halkyon_train_flutter/lib/src/app/train_paths.dart
#	docs/adr/0030-halkyon-train.md

apps/train/halkyon_train_flutter/test/app/train_app_test.dart

@@ -55,6 +55,8 @@ import 'package:halkyon_train_flutter/src/feature/strength/model/exercise_catalo
 import 'package:halkyon_train_flutter/src/feature/strength/model/strength_plan.dart';
 import 'package:halkyon_train_flutter/src/feature/weather/data/weather_gateway.dart';
 import 'package:halkyon_train_flutter/src/feature/weather/model/workout_weather.dart';
+import 'package:halkyon_train_flutter/src/feature/weight/data/weight_repository.dart';
+import 'package:halkyon_train_flutter/src/feature/weight/widget/weight_card.dart';
 import 'package:halkyon_train_flutter/src/feature/workout/data/workout_repository.dart';
 import 'package:halkyon_train_flutter/src/feature/workout/model/series_chunk.dart';
 import 'package:halkyon_train_flutter/src/feature/workout/model/workout.dart';
@@ -85,6 +87,7 @@ import '../support/memory_plan_gateway.dart';
 import '../support/memory_profile_gateway.dart';
 import '../support/memory_route_gateway.dart';
 import '../support/memory_strength_plan_gateway.dart';
+import '../support/memory_weight_gateway.dart';
 import '../support/memory_workout_gateway.dart';
 
 void main() {
@@ -121,6 +124,7 @@ void main() {
     PlanRepository? plans,
     RouteRepository? routes,
     PlaceRepository? places,
+    WeightRepository? weights,
     StrengthPlanRepository? strengthPlans,
     StrengthSessionStore? strengthSession,
     RoutingGateway? routing,
@@ -193,6 +197,10 @@ void main() {
             opened.add(person);
             return TrainPerson(
               person,
+              sync: SyncService(
+                ({required onMerge}) async {},
+                debounce: const Duration(days: 1),
+              ),
               workouts:
                   workouts ??
                   WorkoutRepository(
@@ -255,6 +263,16 @@ void main() {
                     ),
                   ),
               chosenPlace: ChosenPlaceStore(),
+              weights:
+                  weights ??
+                  WeightRepository(
+                    MemoryWeightGateway(),
+                    TrainKeys(
+                      MemoryContentKeyGateway(),
+                      FakeContentCipher(),
+                      () async => FakeAccountCrypto().keysNumbered(1),
+                    ),
+                  ),
               strengthPlans:
                   strengthPlans ??
                   StrengthPlanRepository(
@@ -505,14 +523,15 @@ void main() {
       }
     });
 
-    testWidgets('Settings groups the training first, then the account, About '
-        'Halkyon Train last and the version small at the very foot', (
-      tester,
-    ) async {
+    testWidgets('Settings groups where sync stands first, with Sync now, then '
+        'the training, then the account, About Halkyon Train last and the '
+        'version small at the very foot', (tester) async {
       await start(tester, usedBefore: true);
       await openSettings(tester);
 
+      expect(find.text('Sync now'), findsOneWidget);
       final order = [
+        'Sync',
         'Your body',
         'Account',
         'Sign out',
@@ -961,6 +980,25 @@ void main() {
       await tester.pumpAndSettle();
     }
 
+    testWidgets("the switches' explanations wait behind their question marks "
+        '(D64)', (tester) async {
+      await openMovement(tester);
+      const hint =
+          'When the phone counted hardly a step for a while; never while '
+          'recording or in a car.';
+      expect(find.text(hint), findsNothing);
+
+      await tester.tap(
+        find.descendant(
+          of: find.widgetWithText(SwitchListTile, 'Remind me to move'),
+          matching: find.byType(HelpButton),
+        ),
+      );
+      await tester.pumpAndSettle();
+      expect(find.text(hint), findsOneWidget);
+      expect(platform.configured, [null], reason: 'nothing switched');
+    });
+
     testWidgets('reminders turned on ask for the permissions, and the job '
         'gets the settings and the words, each change again', (tester) async {
       await openMovement(tester);
@@ -1194,6 +1232,57 @@ void main() {
       expect(find.text('50'), findsOneWidget);
     });
 
+    testWidgets('a weight entered on Progress shows on its card and in Your '
+        'body, and goes again from All (D64)', (tester) async {
+      await start(tester, usedBefore: true, profile: profile);
+      await openProgress(tester);
+      await tester.runAsync(pumpEventQueue);
+      await tester.pump();
+      final card = find.byType(WeightCard);
+      expect(
+        find.descendant(
+          of: card,
+          matching: find.textContaining('Add your weight'),
+        ),
+        findsOneWidget,
+      );
+
+      await tester.tap(
+        find.descendant(of: card, matching: find.byTooltip('Add weight')),
+      );
+      await tester.pumpAndSettle();
+      await tester.enterText(find.byType(TextField), '1000');
+      await tester.tap(find.text('Save'));
+      await tester.pumpAndSettle();
+      expect(find.text('A weight between 20 and 400 kg'), findsOneWidget);
+
+      await tester.enterText(find.byType(TextField), '71,4');
+      await tester.tap(find.text('Save'));
+      await tester.runAsync(pumpEventQueue);
+      await tester.pumpAndSettle();
+      await tester.runAsync(pumpEventQueue);
+      await tester.pumpAndSettle();
+      expect(
+        find.descendant(of: card, matching: find.text('71.4 kg')),
+        findsOneWidget,
+      );
+      expect(
+        find.descendant(
+          of: find.byType(BodyCard),
+          matching: find.textContaining('71.4 kg'),
+        ),
+        findsOneWidget,
+        reason: "the latest weight is the body's",
+      );
+
+      await tester.tap(find.descendant(of: card, matching: find.text('All')));
+      await tester.pumpAndSettle();
+      await tester.tap(find.byTooltip('Delete'));
+      await tester.runAsync(pumpEventQueue);
+      await tester.pumpAndSettle();
+      expect(find.text('71.4 kg'), findsNothing);
+    });
+
     testWidgets("without figures, Profile's card says what they're for", (
       tester,
     ) async {
@@ -2835,6 +2924,8 @@ void main() {
             'recovery': 4,
             'rmssd': 48,
             'baselineRmssd': 45,
+            // Polar's mark for a status it has none of.
+            'ansStatus': -100.0,
           }),
       ),
     );
@@ -2872,16 +2963,36 @@ void main() {
       await tester.tap(find.text('Tuesday, October 27'));
       await tester.pumpAndSettle();
 
-      // Inside Profile, the tabs beside it (D60).
-      expect(find.byType(NavigationBar), findsOneWidget);
+      // A screen of its own over the tabs, the way back at its top left
+      // (the developer's review of 3 Nov 2026).
+      expect(find.byType(NavigationBar), findsNothing);
+      expect(find.byType(BackButton), findsOneWidget);
       expect(find.text('Heart rate'), findsOneWidget);
       expect(find.text('The night'), findsOneWidget);
       expect(find.text('You slept well'), findsOneWidget);
       await tester.scrollUntilVisible(find.text('Nightly Recharge'), 200);
-      expect(
-        find.text('Heart rate variability 48 ms, your usual 45 ms'),
-        findsOneWidget,
+      // The person's figures in rows, each with their usual; Polar's mark
+      // for no value shown nowhere, the explanation behind the question
+      // mark.
+      expect(find.text('Recovery'), findsOneWidget);
+      expect(find.text('4 of 6'), findsOneWidget);
+      expect(find.text('Heart rate variability'), findsOneWidget);
+      expect(find.text('48 ms'), findsOneWidget);
+      expect(find.text('usually 45 ms'), findsOneWidget);
+      expect(find.textContaining('100'), findsNothing);
+      expect(find.text('Autonomic nervous system'), findsNothing);
+      expect(find.textContaining('from −10 to +10'), findsNothing);
+      await tester.tap(
+        find.descendant(
+          of: find.ancestor(
+            of: find.text('Nightly Recharge'),
+            matching: find.byType(Row),
+          ),
+          matching: find.byType(HelpButton),
+        ),
       );
+      await tester.pumpAndSettle();
+      expect(find.textContaining('from −10 to +10'), findsOneWidget);
     });
 
     testWidgets("Home shows today's figures from the band, even before a "