Show API save errors in RoomModal footer

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

src/components/rooms/RoomModal.tsx

@@ -49,9 +49,10 @@ interface RoomModalProps {
   categories?: { id: string; name: string }[]
   onClose: () => void
   onSave: (room: Room) => void
+  error?: string | null
 }
 
-export function RoomModal({ open, room, categories = [], onClose, onSave }: RoomModalProps) {
+export function RoomModal({ open, room, categories = [], onClose, onSave, error }: RoomModalProps) {
   const isEdit = !!room
   const [tab, setTab] = useState<ModalTab>('main')
 
@@ -164,6 +165,9 @@ export function RoomModal({ open, room, categories = [], onClose, onSave }: Room
       size="xl"
       footer={
         <>
+          {error && (
+            <p className="text-sm text-red-600 dark:text-red-400 flex-1 text-left">{error}</p>
+          )}
           <button onClick={onClose} className="btn-secondary">Отмена</button>
           <button onClick={handleSave} className="btn-primary" disabled={!form.number}>
             {isEdit ? 'Сохранить' : 'Добавить номер'}