Compute guest counts server-side on booking create

src/main/kotlin/com/android/trisolarisserver/controller/BookingFlow.kt

@@ -79,6 +79,17 @@ class BookingFlow(
         val shouldCheckIn = !expectedCheckInAt.isBefore(now)
         val phone = request.guestPhoneE164?.trim()?.takeIf { it.isNotBlank() }
         val guest = resolveGuestForBooking(propertyId, property, actor, now, phone)
+        val hasGuestCounts = request.maleCount != null || request.femaleCount != null || request.childCount != null
+        val adultCount = if (hasGuestCounts) {
+            (request.maleCount ?: 0) + (request.femaleCount ?: 0)
+        } else {
+            null
+        }
+        val totalGuestCount = if (hasGuestCounts) {
+            adultCount + (request.childCount ?: 0)
+        } else {
+            null
+        }
         val booking = com.android.trisolarisserver.models.booking.Booking(
             property = property,
             primaryGuest = guest,
@@ -94,11 +105,11 @@ class BookingFlow(
                 }
                 mode
             },
-            adultCount = request.adultCount,
+            adultCount = adultCount,
             childCount = request.childCount,
             maleCount = request.maleCount,
             femaleCount = request.femaleCount,
-            totalGuestCount = request.totalGuestCount,
+            totalGuestCount = totalGuestCount,
             notes = request.notes,
             createdBy = actor,
             updatedAt = now

src/main/kotlin/com/android/trisolarisserver/controller/dto/BookingDtos.kt

@@ -19,11 +19,9 @@ data class BookingCreateRequest(
     val expectedCheckOutAt: String,
     val guestPhoneE164: String? = null,
     val transportMode: String? = null,
-    val adultCount: Int? = null,
     val childCount: Int? = null,
     val maleCount: Int? = null,
     val femaleCount: Int? = null,
-    val totalGuestCount: Int? = null,
     val notes: String? = null
 )