The booking timetable no longer flashes when you switch weeks, and add-on details are readable in light mode

Clicking Prev, Today or Next on your booking timetable rebuilt the entire timetable — services, hours, blackout dates and all — just to change the week shown, which looked like a flash or glitch. Only the calendar itself now redraws. Separately, the feature list on each add-on card (SIMCOAI Voices, Premium AI Models and others) was set in colours tuned for dark mode only, so in light mode the text was almost impossible to read. Both are fixed.