fix(execution): carrousel de médias et chrono du score (tickets #41, #42, #43)

Corrige l'affichage des images (#41) et de la vidéo (#42) dans le
carrousel de médias, et le format du chrono de score qui n'affichait
que les secondes (#43) sur workout_execution_screen.dart. Ajoute la
dépendance video_player (2.13.0) pour la lecture vidéo. Ajuste
home_screen.dart, history_screen.dart et workout_template_screen.dart
en conséquence. flutter analyze propre, flutter test 77/77 vert (plus
aucun hang), pub get résolu.

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

lib/presentation/history_screen.dart

@@ -13,6 +13,7 @@ final class HistoryListScreen extends StatefulWidget {
     required this.workoutTemplateUseCases,
     required this.activeUseCases,
     required this.closeUseCase,
+    this.mediaUseCases,
     super.key,
   });
 
@@ -20,6 +21,7 @@ final class HistoryListScreen extends StatefulWidget {
   final WorkoutTemplateUseCases workoutTemplateUseCases;
   final ActiveWorkoutSessionUseCases activeUseCases;
   final CloseWorkoutSessionUseCase closeUseCase;
+  final MediaUseCases? mediaUseCases;
 
   @override
   State<HistoryListScreen> createState() => _HistoryListScreenState();
@@ -93,6 +95,7 @@ final class _HistoryListScreenState extends State<HistoryListScreen> {
           workoutTemplateUseCases: widget.workoutTemplateUseCases,
           activeUseCases: widget.activeUseCases,
           closeUseCase: widget.closeUseCase,
+          mediaUseCases: widget.mediaUseCases,
         ),
       ),
     );
@@ -111,6 +114,7 @@ final class HistoryDetailScreen extends StatelessWidget {
     required this.workoutTemplateUseCases,
     required this.activeUseCases,
     required this.closeUseCase,
+    this.mediaUseCases,
     super.key,
   });
 
@@ -119,6 +123,7 @@ final class HistoryDetailScreen extends StatelessWidget {
   final WorkoutTemplateUseCases workoutTemplateUseCases;
   final ActiveWorkoutSessionUseCases activeUseCases;
   final CloseWorkoutSessionUseCase closeUseCase;
+  final MediaUseCases? mediaUseCases;
 
   @override
   Widget build(BuildContext context) {
@@ -191,6 +196,7 @@ final class HistoryDetailScreen extends StatelessWidget {
           closeUseCase: closeUseCase,
           historyUseCases: historyUseCases,
           workoutTemplateUseCases: workoutTemplateUseCases,
+          mediaUseCases: mediaUseCases,
         ),
       ),
     );