fix "Нова смяна" shift name on manual shifts

pages/cart/calendar/index.tsx

@@ -598,8 +598,10 @@ export default function CalendarPage({ initialEvents, initialShifts }) {
         const lastShiftEndTime = new Date(lastShift.endTime);
         //add 90 minutes
         const newShiftEndTime = new Date(lastShiftEndTime.getTime() + 90 * 60000);
+        // Generate shift name using the same format as displayed shifts (start-end time)
+        const shiftName = common.getTimeRange(lastShiftEndTime, newShiftEndTime);
         await axiosInstance.post(`/api/data/shifts`, {
-            name: "Нова смяна",
+            name: shiftName,
             startTime: lastShiftEndTime,
             endTime: newShiftEndTime,
             isPublished: false,