feat: add past slot validation to appointment controllers and update SlotCard component

src/Appointment/Controller/MyAppointmentsController.php

@@ -45,6 +45,10 @@ class MyAppointmentsController extends BaseController
             return $this->error('VALIDATION', 'همه فیلدها الزامی است', 422);
         }
 
+        if ($slotStart < time()) {
+            return $this->error('SLOT_PAST', 'زمان این اسلات گذشته است', 422);
+        }
+
         $doctor = $this->doctorRepo->findByUuid($doctorUuid);
         if (!$doctor) return $this->error('DOCTOR_NOT_FOUND', 'پزشک یافت نشد', 404);