Retain joins in hour on realtime update

nazara/apps/web/app/day/[date]/realtime.tsx

@@ -26,7 +26,10 @@ export default function RealtimeDayPage({ initialDay }) {
                 const prevHours = day.hours;
                 const newHours = prevHours.map((hour) => {
                     if (hour.id === updatedHour.id) {
-                        return updatedHour;
+                        return {
+                            ...updatedHour,
+                            category: hour.category,
+                        };
                     }
                     return hour;
                 });