feat(ui): compteur de série visible pendant l'exécution (ticket #34)

Affiche le compteur de série en cours sur workout_execution_screen.dart.
flutter analyze propre, 58/58 tests verts, build APK debug validé.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

lib/presentation/workout_execution_screen.dart

@@ -124,6 +124,11 @@ final class _WorkoutExecutionScreenState extends State<WorkoutExecutionScreen> {
           progressLabel: _plan.progressLabel(_position),
         ),
         const SizedBox(height: 24),
+        _SeriesCounterCard(
+          currentSet: _position.setIndex + 1,
+          totalSets: _exercise.setsCount,
+        ),
+        const SizedBox(height: 16),
         Text(_exercise.name, style: Theme.of(context).textTheme.headlineMedium),
         const SizedBox(height: 16),
         SetMeasureInput(
@@ -168,10 +173,15 @@ final class _WorkoutExecutionScreenState extends State<WorkoutExecutionScreen> {
           ),
           if (next != null && nextExercise != null) ...[
             const SizedBox(height: 24),
+            Text('Ensuite : ${nextExercise.name}', textAlign: TextAlign.center),
+            const SizedBox(height: 8),
             Text(
-              'Ensuite : ${nextExercise.name} · '
               'Série ${next.setIndex + 1} / ${nextExercise.setsCount}',
               textAlign: TextAlign.center,
+              style: Theme.of(context).textTheme.displaySmall?.copyWith(
+                color: Theme.of(context).colorScheme.primary,
+                fontSize: 30,
+              ),
             ),
           ],
           const Spacer(),
@@ -1304,10 +1314,8 @@ final class WorkoutExecutionPlan {
 
   String progressLabel(ExecutionPosition position) {
     final program = programAt(position);
-    final exercise = exerciseAt(position);
     return 'Programme ${position.programIndex + 1}/${programs.length} · '
-        'Exercice ${position.exerciseIndex + 1}/${program.exercises.length} · '
+        'Exercice ${position.exerciseIndex + 1}/${program.exercises.length}';
-        'Série ${position.setIndex + 1}/${exercise.setsCount}';
   }
 }
 
@@ -1463,6 +1471,42 @@ final class _Header extends StatelessWidget {
   }
 }
 
+final class _SeriesCounterCard extends StatelessWidget {
+  const _SeriesCounterCard({required this.currentSet, required this.totalSets});
+
+  final int currentSet;
+  final int totalSets;
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final tokens = courtBlazerTokensOf(context);
+    return CourtBlazerAccentPanel(
+      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Text(
+            'SÉRIE',
+            style: theme.textTheme.labelSmall?.copyWith(
+              color: tokens.mutedText,
+              fontWeight: FontWeight.w600,
+            ),
+          ),
+          const SizedBox(height: 6),
+          Text(
+            '$currentSet / $totalSets',
+            style: theme.textTheme.displayLarge?.copyWith(
+              color: theme.colorScheme.primary,
+              fontSize: 48,
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}
+
 String _formatDuration(Duration duration) {
   final minutes = duration.inMinutes.remainder(60).toString().padLeft(2, '0');
   final seconds = duration.inSeconds.remainder(60).toString().padLeft(2, '0');

test/presentation/workout_execution_screen_test.dart

@@ -165,6 +165,7 @@ void main() {
 
     expect(find.text('Repos avant la prochaine série'), findsOneWidget);
     expect(find.text('00:45'), findsOneWidget);
+    expect(find.text('Série 2 / 2'), findsOneWidget);
 
     await tester.tap(find.text('+15 s'));
     await tester.pump();
@@ -181,6 +182,9 @@ void main() {
   testWidgets('la mesure temps enregistre une durée réelle de série', (
     tester,
   ) async {
+    await tester.binding.setSurfaceSize(const Size(400, 1400));
+    addTearDown(() => tester.binding.setSurfaceSize(null));
+
     final clock = _FakeClock(DateTime.utc(2026, 7, 17, 12));
     final repository = _FakeActiveSessionRepository();
     final session = ActiveWorkoutSession(
@@ -221,6 +225,9 @@ void main() {
   testWidgets(
     'terminer la série 2 avec temps répétitions et score manuel avance',
     (tester) async {
+      await tester.binding.setSurfaceSize(const Size(400, 1400));
+      addTearDown(() => tester.binding.setSurfaceSize(null));
+
       final clock = _FakeClock(DateTime.utc(2026, 7, 17, 12));
       final repository = _FakeActiveSessionRepository();
       final session = ActiveWorkoutSession(
@@ -256,10 +263,9 @@ void main() {
         ),
       );
 
-      expect(
+      expect(find.text('Programme 1/1 · Exercice 1/1'), findsOneWidget);
-        find.text('Programme 1/1 · Exercice 1/1 · Série 2/3'),
+      expect(find.text('SÉRIE'), findsOneWidget);
-        findsOneWidget,
+      expect(find.text('2 / 3'), findsOneWidget);
-      );
       expect(find.text('30 s'), findsOneWidget);
 
       for (var i = 0; i < 3; i++) {
@@ -279,10 +285,8 @@ void main() {
       expect(repository.results.single.actualReps, 3);
       expect(repository.results.single.actualScore, 5);
       expect(repository.session?.currentSetIndex, 2);
-      expect(
+      expect(find.text('Programme 1/1 · Exercice 1/1'), findsOneWidget);
-        find.text('Programme 1/1 · Exercice 1/1 · Série 3/3'),
+      expect(find.text('3 / 3'), findsOneWidget);
-        findsOneWidget,
-      );
     },
   );
 
@@ -445,10 +449,8 @@ void main() {
       await tester.tap(find.byTooltip('Fermer'));
       await tester.pumpAndSettle();
 
-      expect(
+      expect(find.text('Programme 1/1 · Exercice 1/1'), findsOneWidget);
-        find.text('Programme 1/1 · Exercice 1/1 · Série 3/4'),
+      expect(find.text('3 / 4'), findsOneWidget);
-        findsOneWidget,
-      );
     },
   );
 
@@ -493,10 +495,8 @@ void main() {
 
       expect(find.text('Plan de séance'), findsNothing);
       expect(find.text('Modifier la série'), findsNothing);
-      expect(
+      expect(find.text('Programme 1/1 · Exercice 1/1'), findsOneWidget);
-        find.text('Programme 1/1 · Exercice 1/1 · Série 2/3'),
+      expect(find.text('2 / 3'), findsOneWidget);
-        findsOneWidget,
-      );
     },
   );
 }