feat(ui): écran Historique des séances

Ajoute l'écran d'historique des séances (presentation/history_screen.dart),
avec les ajustements application/domaine/repositories nécessaires et la
navigation depuis l'accueil. Complète le dernier écran du périmètre UI.
flutter analyze propre, 18/18 tests verts, build APK debug validé.

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

test/presentation/workout_execution_screen_test.dart

@@ -33,6 +33,8 @@ void main() {
             clock,
           ),
           closeUseCase: _closeUseCase(_FakeActiveSessionRepository(), clock),
+          historyUseCases: _historyUseCases(clock),
+          workoutTemplateUseCases: _workoutTemplateUseCases(),
         ),
       ),
     );
@@ -141,6 +143,23 @@ CloseWorkoutSessionUseCase _closeUseCase(
   );
 }
 
+WorkoutHistoryUseCases _historyUseCases(_FakeClock clock) {
+  return WorkoutHistoryUseCases(
+    repository: _FakeWorkoutHistoryRepository(),
+    clock: clock,
+  );
+}
+
+WorkoutTemplateUseCases _workoutTemplateUseCases() {
+  return WorkoutTemplateUseCases(
+    templateRepository: _FakeWorkoutTemplateRepository(),
+    programRepository: _FakeProgramRepository(),
+    clock: _FakeClock(DateTime.utc(2026, 7, 17)),
+    ids: _FakeIds(),
+    originDeviceId: 'device-1',
+  );
+}
+
 String _sessionSnapshot({int setsCount = 3, int restSeconds = 0}) {
   return jsonEncode({
     'name': 'Séance jambes',
@@ -260,9 +279,35 @@ final class _FakeWorkoutTemplateRepository
 }
 
 final class _FakeWorkoutHistoryRepository implements WorkoutHistoryRepository {
+  @override
+  Future<void> delete(String id, DateTime deletedAt) async {}
+
+  @override
+  Future<WorkoutHistory?> findById(String id) async => null;
+
+  @override
+  Future<List<WorkoutHistory>> listActive() async => const [];
+
   @override
   Future<void> save(WorkoutHistory history) async {}
 
   @override
   Future<void> saveSetResult(WorkoutHistorySetResult result) async {}
 }
+
+final class _FakeProgramRepository implements ProgramRepository {
+  @override
+  Future<void> replaceExercises(Program program, DateTime deletedAt) async {}
+
+  @override
+  Future<Program?> findById(String id) async => null;
+
+  @override
+  Future<List<Program>> listActive() async => const [];
+
+  @override
+  Future<void> save(Program program) async {}
+
+  @override
+  Future<void> saveExercise(ProgramExercise exercise) async {}
+}