frontend changes: change shift order display, added config map

frontend/src/components/Calendar.jsx

@@ -141,10 +141,16 @@ export default function Calendar({
           const shifts = scheduleData[key] ?? { shift1: [], shift2: [], shift3: [] }
           const isToday   = date.getTime() === today.getTime()
           const isWeekend  = date.getDay() === 0 || date.getDay() === 6
+          // Get next day's shift1 for display
+          const nextDate = addDays(date, 1)
+          const nextKey = toDateKey(nextDate)
+          const nextDayShift1 = scheduleData[nextKey]?.shift1 ?? []
           // Which shifts on this date are part of the active test window?
           const activeShifts = new Set()
           if (key === activeWindow.shift3Date) activeShifts.add(3)
           if (key === activeWindow.shift1Date) activeShifts.add(1)
+          // Check if next day's shift1 is active
+          const nextDayShift1Active = nextKey === activeWindow.shift1Date
           return (
             <DayColumn
               key={key}
@@ -152,6 +158,8 @@ export default function Calendar({
               isToday={isToday}
               activeShifts={activeShifts}
               shifts={shifts}
+              nextDayShift1={nextDayShift1}
+              nextDayShift1Active={nextDayShift1Active}
               showShift2={isWeekend || (daytimeDateKey !== null && key === daytimeDateKey)}
               windowLookup={windowLookup}
               onWindowSelect={onWindowSelect}