diff --git a/.ideai/tickets/78/carnet.md b/.ideai/tickets/78/carnet.md
index 1aafdee..0148e66 100644
--- a/.ideai/tickets/78/carnet.md
+++ b/.ideai/tickets/78/carnet.md
@@ -1,6 +1,6 @@
 ---
 issueRef: "#78"
-version: 1
-updatedBy: {"kind":"agent","agent_id":"f8f40941-ecf7-4830-b9de-8818a099f448"}
-updatedAt: 1784547239512
+version: 2
+updatedBy: {"kind":"agent","agent_id":"57695b92-24d0-4876-837c-76116e70a6ae"}
+updatedAt: 1784549136530
 ---
diff --git a/.ideai/tickets/78/issue.md b/.ideai/tickets/78/issue.md
index 0564f00..45d5b75 100644
--- a/.ideai/tickets/78/issue.md
+++ b/.ideai/tickets/78/issue.md
@@ -2,15 +2,15 @@
 id: "e7769413-3d3d-48af-b55e-361c69aef4b2"
 number: 78
 title: "[DevFrontend] État d'exécution Chrono suivant prêt"
-status: "open"
+status: "qa"
 priority: "medium"
 sprint: null
 links: [{"target":"#73","kind":"relatesTo"},{"target":"#76","kind":"dependsOn"},{"target":"#77","kind":"dependsOn"}]
 agentRefs: [{"agentId":"9933c93a-b8a1-4164-a3bb-7063fdad747d","role":"assigned"}]
 createdBy: {"kind":"agent","agent_id":"f8f40941-ecf7-4830-b9de-8818a099f448"}
-updatedBy: {"kind":"agent","agent_id":"f8f40941-ecf7-4830-b9de-8818a099f448"}
+updatedBy: {"kind":"agent","agent_id":"57695b92-24d0-4876-837c-76116e70a6ae"}
 createdAt: 1784547239512
-updatedAt: 1784547239512
-version: 1
+updatedAt: 1784549136530
+version: 2
 ---
 Adapter l'écran d'exécution des étapes pour afficher `Chrono suivant prêt` quand une étape Temps est prête après une étape Temps et que l'auto-enchaînement effectif est désactivé. Réutiliser `stoppedTimer` côté domaine; l'UI dérive le libellé/bouton depuis l'étape courante, le résultat précédent et la valeur effective. Bouton `Démarrer le chrono`, pas de pause séance, pas de rouge/erreur. Après kill/reprise, l'écran doit revenir à cet état sans démarrage automatique.
\ No newline at end of file
diff --git a/.ideai/tickets/index.json b/.ideai/tickets/index.json
index 29e48b8..234d05f 100644
--- a/.ideai/tickets/index.json
+++ b/.ideai/tickets/index.json
@@ -883,13 +883,13 @@
       "issueRef": "#78",
       "path": "78",
       "title": "[DevFrontend] État d'exécution Chrono suivant prêt",
-      "status": "open",
+      "status": "qa",
       "priority": "medium",
       "sprint": null,
       "assignedAgentIds": [
         "9933c93a-b8a1-4164-a3bb-7063fdad747d"
       ],
-      "updatedAt": 1784547239512
+      "updatedAt": 1784549136530
     },
     {
       "issueRef": "#79",
diff --git a/test/application/use_cases_test.dart b/test/application/use_cases_test.dart
index c70cda7..c195c99 100644
--- a/test/application/use_cases_test.dart
+++ b/test/application/use_cases_test.dart
@@ -1281,6 +1281,76 @@ void main() {
     },
   );
 
+  test(
+    'step chaining disabled stops at first elapsed timed boundary after kill',
+    () async {
+      final clock = _FakeClock(DateTime.utc(2026, 7, 17, 12));
+      final session = _sessionWithSnapshot(
+        currentProgramIndex: 0,
+        currentExerciseIndex: 0,
+        currentSetIndex: 0,
+        setsCount: 1,
+        targetReps: 1,
+        autoStartNextTimedStepSnapshot: false,
+        exerciseSteps: [
+          ..._twoTimedSteps(),
+          _step(
+            id: 'step-3',
+            position: 2,
+            name: 'Centre',
+            type: ExerciseStepType.time,
+            defaultTargetValue: 1,
+          ),
+        ],
+      );
+      final repository = _FakeActiveSessionRepository()..session = session;
+
+      await ActiveExerciseStepUseCases(
+        sessionRepository: repository,
+        clock: clock,
+        ids: _FakeIds(),
+        originDeviceId: 'device-1',
+      ).startOrResumeProgress(
+        sessionId: session.metadata.id,
+        programIndex: 0,
+        exerciseIndex: 0,
+        setIndex: 0,
+      );
+      await ActiveExerciseStepUseCases(
+        sessionRepository: repository,
+        clock: clock,
+        ids: _FakeIds(),
+        originDeviceId: 'device-1',
+      ).startTimer(
+        sessionId: session.metadata.id,
+        programIndex: 0,
+        exerciseIndex: 0,
+        setIndex: 0,
+      );
+      clock.value = clock.value.add(const Duration(milliseconds: 4500));
+
+      final reconstructed = ActiveExerciseStepUseCases(
+        sessionRepository: repository,
+        clock: clock,
+        ids: _FakeIds(),
+        originDeviceId: 'device-1',
+      );
+      final view = await reconstructed.startOrResumeProgress(
+        sessionId: session.metadata.id,
+        programIndex: 0,
+        exerciseIndex: 0,
+        setIndex: 0,
+      );
+
+      expect(view.state.status, ActiveExerciseStepProgressStatus.stoppedTimer);
+      expect(view.state.currentStepIndex, 1);
+      expect(view.state.startedAt, isNull);
+      expect(view.state.accumulatedMs, 0);
+      expect(repository.stepResults, hasLength(1));
+      expect(repository.stepResults.single.stepIndex, 0);
+    },
+  );
+
   test(
     'step chaining resolution uses program override before exercise snapshot',
     () async {