fix: normalizeRoom converts NUMERIC baseRate string to number in api.ts

PostgreSQL NUMERIC columns are returned as strings by node-postgres.
Added normalizeRoom() that coerces baseRate/hourlyRate/floor to JS numbers
before they reach components, eliminating string concatenation bugs like
"300005000.005000.00" in price calculations.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/bookings/BookingModal.tsx

@@ -337,13 +337,14 @@ export function BookingModal({ open, draft, rooms, bookings = [], onClose, onSav
     if (!room || !form.checkIn || nightCount <= 0) return 0
     const catId = room.categoryId
     const catOverrides = catId ? priceOverrides?.[catId] : undefined
-    const fallback = room.baseRate ?? 0
+    // room.baseRate is NUMERIC in DB — pg returns it as a string; always coerce
+    const fallback = Number(room.baseRate) || 0
     if (!catOverrides) return fallback * nightCount
     let sum = 0
     for (let i = 0; i < nightCount; i++) {
       const d = format(addDays(parseISO(form.checkIn), i), 'yyyy-MM-dd')
-      const p = catOverrides[d]
+      const p = Number(catOverrides[d])
-      sum += (typeof p === 'number' && isFinite(p)) ? p : fallback
+      sum += (isFinite(p) && p > 0) ? p : fallback
     }
     return sum
   })()

src/lib/api.ts

@@ -119,6 +119,15 @@ const CHANNEL_DISPLAY_NAMES: Record<string, string> = {
   onetwotrip:    'OneTwoTrip',
 }
 
+function normalizeRoom(r: Room): Room {
+  return {
+    ...r,
+    baseRate:   Number(r.baseRate)  || 0,
+    hourlyRate: r.hourlyRate != null ? Number(r.hourlyRate) : undefined,
+    floor:      Number(r.floor)     || 0,
+  }
+}
+
 function normalizeChannel(raw: Record<string, unknown>): Channel {
   const name = raw.name as ChannelName
   return {
@@ -171,13 +180,13 @@ export const api = {
   // ── Rooms ─────────────────────────────────────────────────────────────────
   rooms: {
     list: (slug: string) =>
-      req<Room[]>('GET', `/api/hotels/${slug}/rooms`),
+      req<Room[]>('GET', `/api/hotels/${slug}/rooms`).then(rooms => rooms.map(normalizeRoom)),
 
     create: (slug: string, data: RoomPayload) =>
-      req<Room>('POST', `/api/hotels/${slug}/rooms`, toRoomPayload(data)),
+      req<Room>('POST', `/api/hotels/${slug}/rooms`, toRoomPayload(data)).then(normalizeRoom),
 
     update: (slug: string, id: string, data: Partial<RoomPayload>) =>
-      req<Room>('PATCH', `/api/hotels/${slug}/rooms/${id}`, toRoomPayload(data)),
+      req<Room>('PATCH', `/api/hotels/${slug}/rooms/${id}`, toRoomPayload(data)).then(normalizeRoom),
 
     delete: (slug: string, id: string) =>
       req<void>('DELETE', `/api/hotels/${slug}/rooms/${id}`),