feat(ui): affichage du chrono de score dans le plan et l'historique (ticket #28)

Affiche le chrono du score chronométré sur workout_execution_screen.dart
(plan de séance) et history_screen.dart (historique). flutter analyze
propre, 77/77 tests verts, build APK debug validé. Dernier ticket du
backlog — clôture aussi le ticket parent #18 (score chronométré).

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

lib/presentation/history_screen.dart

@@ -314,6 +314,22 @@ final class HistorySetDetail {
       final value = _formatScoreValue(result['actualScore'] as num);
       parts.add(unit == null ? 'Score $value' : 'Score $value $unit');
     }
+    if (exercise['scoreEnabled'] == true &&
+        _historyScoreInputMode(exercise, result) == ScoreInputMode.stopwatch &&
+        result['actualScoreTimeMs'] != null) {
+      final value = _formatScoreStopwatch(
+        Duration(milliseconds: result['actualScoreTimeMs'] as int),
+      );
+      final target = _targetScoreTimeMsFromSnapshot(exercise, result);
+      if (target == null) {
+        parts.add('Temps réalisé : $value');
+      } else {
+        parts.add(
+          'Temps réalisé : $value / objectif '
+          '${_formatScoreStopwatchTarget(Duration(milliseconds: target))}',
+        );
+      }
+    }
     return HistorySetDetail(
       setIndex: result['setIndex'] as int,
       summary: parts.isEmpty ? 'Aucune mesure saisie' : parts.join(' · '),
@@ -361,6 +377,9 @@ Map<String, dynamic> _resultFromDomain(WorkoutHistorySetResult result) {
     'actualTimeMs': result.actualTimeMs,
     'actualReps': result.actualReps,
     'actualScore': result.actualScore,
+    'actualScoreTimeMs': result.actualScoreTimeMs,
+    'scoreInputModeSnapshot': result.scoreInputModeSnapshot.name,
+    'targetScoreTimeMsSnapshot': result.targetScoreTimeMsSnapshot,
   };
 }
 
@@ -372,7 +391,11 @@ String _historySummary(WorkoutHistory history) {
       : (snapshot['results'] as List<dynamic>? ?? const [])
             .cast<Map<String, dynamic>>();
   final scoreCount = rawResults
-      .where((result) => result['actualScore'] != null)
+      .where(
+        (result) =>
+            result['actualScore'] != null ||
+            result['actualScoreTimeMs'] != null,
+      )
       .length;
   return '${rawResults.length} séries · $scoreCount score${scoreCount > 1 ? 's' : ''}';
 }
@@ -403,6 +426,47 @@ String _formatDurationMs(int milliseconds) {
   return '$minutes:$seconds';
 }
 
+String _formatScoreStopwatch(Duration duration) {
+  final totalTenths = (duration.inMilliseconds / 100).floor();
+  final minutes = (totalTenths ~/ 600).toString().padLeft(2, '0');
+  final seconds = ((totalTenths ~/ 10) % 60).toString().padLeft(2, '0');
+  final tenths = totalTenths % 10;
+  return '$minutes:$seconds.$tenths';
+}
+
+String _formatScoreStopwatchTarget(Duration duration) {
+  if (duration.inMilliseconds % 1000 == 0) {
+    return _formatDurationMs(duration.inMilliseconds);
+  }
+  return _formatScoreStopwatch(duration);
+}
+
+ScoreInputMode _scoreInputModeFromSnapshot(Object? value) {
+  return switch (value) {
+    'stopwatch' => ScoreInputMode.stopwatch,
+    _ => ScoreInputMode.manual,
+  };
+}
+
+int? _targetScoreTimeMsFromSnapshot(
+  Map<String, dynamic> exercise,
+  Map<String, dynamic> result,
+) {
+  return result['targetScoreTimeMsSnapshot'] as int? ??
+      (exercise['targetScoreTimeMs'] as int?);
+}
+
+ScoreInputMode _historyScoreInputMode(
+  Map<String, dynamic> exercise,
+  Map<String, dynamic> result,
+) {
+  final resultMode = result['scoreInputModeSnapshot'];
+  if (resultMode != null) {
+    return _scoreInputModeFromSnapshot(resultMode);
+  }
+  return _scoreInputModeFromSnapshot(exercise['scoreInputModeSnapshot']);
+}
+
 final class _CenteredMessage extends StatelessWidget {
   const _CenteredMessage({required this.title, this.message});