feat(bookings): allow transferring bookings to another PIC

Add UI modal and button to reassign bookings to different contacts
Create API endpoint and repository method to handle PIC transfers

server/utils/booking-repository.ts

@@ -637,6 +637,50 @@ export async function updateBookingRemark(input: {
   return rows[0] ? mapBooking(rows[0]) : null
 }
 
+export async function updateBookingPersonInCharge(input: {
+  bookingId: string
+  currentPersonInChargeId?: string
+  nextPersonInChargeId: string
+}): Promise<PublicBooking | null> {
+  await ensureDatabaseReady()
+  const sql = getSqlClient()
+
+  const rows = input.currentPersonInChargeId
+    ? await sql<DbBookingRow[]>`
+      with updated_booking as (
+        update bookings
+        set
+          person_in_charge_id = ${input.nextPersonInChargeId},
+          updated_at = now()
+        where id = ${input.bookingId}
+          and person_in_charge_id = ${input.currentPersonInChargeId}
+        returning *
+      )
+      select ${bookingSelectColumns(sql)}
+      from updated_booking as bookings
+      ${bookingJoins(sql)}
+      where dinner_events.is_active = true
+      limit 1
+    `
+    : await sql<DbBookingRow[]>`
+      with updated_booking as (
+        update bookings
+        set
+          person_in_charge_id = ${input.nextPersonInChargeId},
+          updated_at = now()
+        where id = ${input.bookingId}
+        returning *
+      )
+      select ${bookingSelectColumns(sql)}
+      from updated_booking as bookings
+      ${bookingJoins(sql)}
+      where dinner_events.is_active = true
+      limit 1
+    `
+
+  return rows[0] ? mapBooking(rows[0]) : null
+}
+
 export async function listBookingSeats(bookingId: string): Promise<PublicBookingSeat[]> {
   await ensureDatabaseReady()
   const sql = getSqlClient()