fix(qa): corrections issues de la passe QA fonctionnelle

Corrige les bugs identifiés lors de la QA finale sur use_cases.dart et
drift_repositories.dart, ajoute la couverture de tests d'infrastructure
manquante (test/infrastructure/drift_repositories_test.dart).
flutter analyze propre, 21/21 tests verts, build APK debug validé.

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

test/application/use_cases_test.dart

@@ -1,3 +1,5 @@
+import 'dart:convert';
+
 import 'package:flutter_test/flutter_test.dart';
 import 'package:gametime/application/application.dart';
 import 'package:gametime/domain/domain.dart';
@@ -35,6 +37,55 @@ void main() {
     );
   });
 
+  test(
+    'Workout template use case rejects target overrides for inactive measures',
+    () async {
+      final useCase = WorkoutTemplateUseCases(
+        templateRepository: _FakeWorkoutTemplateRepository(),
+        programRepository: _FakeProgramRepository(),
+        clock: _FakeClock(DateTime.utc(2026, 7, 17, 12)),
+        ids: _FakeIds(),
+        originDeviceId: 'device-1',
+      );
+
+      await expectLater(
+        useCase.saveConfigured(
+          name: 'Séance tir',
+          programs: [
+            WorkoutTemplateProgramConfig(
+              clientKey: 'program-1',
+              programNameSnapshot: 'Programme tir',
+              defaultRestSecondsSnapshot: 30,
+              programSnapshotJson: jsonEncode({
+                'exercises': [
+                  {
+                    'id': 'exercise-snapshot-1',
+                    'exerciseNameSnapshot': 'Lancers francs',
+                    'setsCount': 3,
+                    'timeEnabled': true,
+                    'repsEnabled': false,
+                    'scoreEnabled': false,
+                    'targetTimeSeconds': 60,
+                    'targetReps': null,
+                    'targetScore': null,
+                  },
+                ],
+              }),
+            ),
+          ],
+          overrides: const [
+            WorkoutTemplateExerciseOverrideConfig(
+              workoutTemplateProgramClientKey: 'program-1',
+              snapshotProgramExerciseId: 'exercise-snapshot-1',
+              targetRepsOverride: 10,
+            ),
+          ],
+        ),
+        throwsA(isA<DomainException>()),
+      );
+    },
+  );
+
   test('Active session elapsed time is based on persisted timestamps', () {
     final clock = _FakeClock(DateTime.utc(2026, 7, 17, 12));
     final session = ActiveWorkoutSession(