fix(booking): prevent past time slots from being selectable for today

apps/frontend/src/features/booking/booking-provider.tsx

@@ -147,6 +147,9 @@ function buildSegmentsForCourt(
   const segments: BookingTimelineSegment[] = [];
   const slotDuration = court.slotDurationMinutes;
 
+  const nowMinutes = timeToMinutes(getNowTime());
+  const isToday = isTodayIso(selectedDate);
+
   const availabilityRanges = court.availability
     .filter((range) => range.dayOfWeek === dayOfWeek)
     .map((range) => ({
@@ -181,6 +184,9 @@ function buildSegmentsForCourt(
       slotStart += slotDuration
     ) {
       const slotEnd = slotStart + slotDuration;
+
+      if (isToday && slotEnd <= nowMinutes) continue;
+
       const isBooked = courtBookings.some((booking) =>
         overlapsBooking(slotStart, slotEnd, booking)
       );