feat(locales): add 'chronometer' translation to English and French locales

refactor(workout-session-header): update header to use 'chronometer' instead of 'elapsed time' for better clarity

locales/en.ts

@@ -170,6 +170,7 @@ export default {
       workout_in_progress: "Workout in Progress",
       quit_workout: "Quit Workout",
       elapsed_time: "Elapsed Time",
+      chronometer: "Chronometer",
       exercise_progress: "Exercise Progress",
       current_exercise: "Current Exercise",
       complete: "Complete",

locales/fr.ts

@@ -170,6 +170,7 @@ export default {
       workout_in_progress: "Entraînement en cours",
       quit_workout: "Quitter l'Entraînement",
       elapsed_time: "Temps écoulé",
+      chronometer: "Chronomètre",
       total_workout_time: "Temps total d'entraînement",
       exercise_progress: "Progression",
       current_exercise: "Exercice actuel",

src/features/workout-session/ui/workout-session-header.tsx

@@ -87,7 +87,7 @@ export function WorkoutSessionHeader({
                   <Clock className="h-4 w-4 text-blue-400" />
                 </div>
                 <div>
-                  <h3 className="text-slate-700 dark:text-white font-semibold text-base">{t("workout_builder.session.elapsed_time")}</h3>
+                  <h3 className="text-slate-700 dark:text-white font-semibold text-base">{t("workout_builder.session.chronometer")}</h3>
                 </div>
               </div>