feat(bookings): add internal remark field to bookings

Add a remark column to the bookings table for management-only notes.
Include UI to view and edit remarks directly from the bookings list.
Create API endpoint and database queries to support remark updates.

server/api/bookings/[id]/remark.patch.ts

@@ -0,0 +1,29 @@
+import type { PublicBooking } from '~~/shared/booking'
+
+import { requireAuth } from '../../../utils/auth'
+import { updateBookingRemark } from '../../../utils/booking-repository'
+import { parseBookingRemarkInput } from '../../../utils/bookings'
+import { getRequiredRouteParam, httpError } from '../../../utils/http'
+
+export default defineEventHandler(async (event): Promise<{ booking: PublicBooking }> => {
+  const auth = await requireAuth(event)
+  const bookingId = getRequiredRouteParam(event, 'id', 'Booking ID')
+  const body = await readBody<{
+    remark?: string | null
+  }>(event)
+
+  const input = parseBookingRemarkInput(body)
+  const booking = await updateBookingRemark({
+    bookingId,
+    remark: input.remark,
+    personInChargeId: auth.user.role === 'super_admin' ? undefined : auth.user.id
+  })
+
+  if (!booking) {
+    httpError(404, 'Booking not found')
+  }
+
+  return {
+    booking
+  }
+})