Add non-null vehicleNumbers to booking list response

docs/API_REFERENCE.txt

@@ -1574,6 +1574,7 @@ BOOKING APIS
   What it does:
 
   - Lists bookings with summary and computed pending amount.
+  - Each booking item includes `vehicleNumbers` (always non-null: empty list or values).
 
   Request body:
 

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

@@ -189,6 +189,7 @@ class BookingFlow(
     }
 
     @GetMapping
+    @Transactional(readOnly = true)
     fun listBookings(
         @PathVariable propertyId: UUID,
         @AuthenticationPrincipal principal: MyPrincipal?,
@@ -238,6 +239,14 @@ class BookingFlow(
             chargeRepo.sumAmountByBookingIds(bookingIds)
                 .associate { it.bookingId to it.total }
         }
+        val guestIds = bookings.mapNotNull { it.primaryGuest?.id }.distinct()
+        val vehicleNumbersByGuest = if (guestIds.isEmpty()) {
+            emptyMap()
+        } else {
+            guestVehicleRepo.findRowsByGuestIds(guestIds)
+                .groupBy { it.guestId }
+                .mapValues { (_, rows) -> rows.map { it.vehicleNumber }.distinct().sorted() }
+        }
         return bookings.map { booking ->
             val guest = booking.primaryGuest
             val stays = staysByBooking[booking.id].orEmpty()
@@ -261,6 +270,7 @@ class BookingFlow(
                 guestId = guest?.id,
                 guestName = guest?.name,
                 guestPhone = guest?.phoneE164,
+                vehicleNumbers = guest?.id?.let { vehicleNumbersByGuest[it] } ?: emptyList(),
                 roomNumbers = roomNumbersByBooking[booking.id] ?: emptyList(),
                 source = booking.source,
                 billingMode = booking.billingMode.name,

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

@@ -56,6 +56,7 @@ data class BookingListItem(
     val guestId: UUID?,
     val guestName: String?,
     val guestPhone: String?,
+    val vehicleNumbers: List<String>,
     val roomNumbers: List<Int>,
     val source: String?,
     val billingMode: String,

src/main/kotlin/com/android/trisolarisserver/repo/guest/GuestVehicleRepo.kt

@@ -2,6 +2,8 @@ package com.android.trisolarisserver.repo.guest
 
 import com.android.trisolarisserver.models.booking.GuestVehicle
 import org.springframework.data.jpa.repository.JpaRepository
+import org.springframework.data.jpa.repository.Query
+import org.springframework.data.repository.query.Param
 import java.util.UUID
 
 interface GuestVehicleRepo : JpaRepository<GuestVehicle, UUID> {
@@ -9,4 +11,18 @@ interface GuestVehicleRepo : JpaRepository<GuestVehicle, UUID> {
     fun findByGuestIdIn(guestIds: List<UUID>): List<GuestVehicle>
     fun existsByPropertyIdAndVehicleNumberIgnoreCase(propertyId: UUID, vehicleNumber: String): Boolean
     fun existsByGuestId(guestId: UUID): Boolean
+
+    @Query(
+        """
+        select gv.guest.id as guestId, gv.vehicleNumber as vehicleNumber
+        from GuestVehicle gv
+        where gv.guest.id in :guestIds
+        """
+    )
+    fun findRowsByGuestIds(@Param("guestIds") guestIds: List<UUID>): List<GuestVehicleRow>
+}
+
+interface GuestVehicleRow {
+    val guestId: UUID
+    val vehicleNumber: String
 }