fix(time-travel): allow deep dive based on historical day response

apps/api/src/services/whatsapp.ts

@@ -413,13 +413,13 @@ export class WhatsAppService {
                 const timeTravelDay = timeTravelDayOverride ?? await getTimeTravelContext(user.id);
                 const effectiveDay = timeTravelDay ?? activeEnrollment.currentDay;
 
-                // 🚨 UNBLOCKING GUARD: Allow 1/APPROFONDIR if a response exists.
+                // 🚨 UNBLOCKING GUARD: Allow 1/APPROFONDIR strictly if a response exists for that effective day.
                 const lastResponse = await prisma.response.findFirst({
                     where: { userId: user.id, dayNumber: effectiveDay },
                     orderBy: { createdAt: 'desc' }
                 });
 
-                if (userProgress?.exerciseStatus === 'COMPLETED' || (userProgress?.exerciseStatus === 'PENDING' && lastResponse)) {
+                if (lastResponse) {
                     await prisma.userProgress.update({
                         where: { id: userProgress!.id },
                         data: { exerciseStatus: 'PENDING_DEEPDIVE' }