Add enums, AuthService, and integrate backend registration endpoints

- Add separate enum files: BuildingType, PropertyStatus, BookingStatus, CommissionType, IdentityType, UserRole, City, LoginMethod, OwnerType, CustomerType
- Add AuthService (addToken/getToken/deleteToken)
- Update api.js: use AuthService, add Owner/Add and Customer/Add endpoints
- Update login page to use AuthService for token storage
- Rewrite owner register: 3-step flow with OwnerType dropdown, backend integration, OTP verification
- Rewrite tenant register: 2-step flow with CustomerType dropdown, backend integration, OTP verification
- Update homepage and property detail to use enums instead of hardcoded maps
- Update AddPropertyForm to import from enums directly
- Add console logs and status toasts linked to API response messages

app/utils/constants.js

@@ -1,41 +1,71 @@
-export const PROPERTY_STATUS = {
-  AVAILABLE: 'available',
-  BOOKED: 'booked',
-  MAINTENANCE: 'maintenance'
-};
+/**
+ * Constants — re-exports from enums for backward compatibility
+ *
+ * New code should import directly from:
+ *   import { BuildingType, BookingStatus, City, ... } from '@/app/enums';
+ *
+ * Old imports from '@/app/utils/constants' continue to work.
+ */
 
-export const BOOKING_STATUS = {
-  PENDING: 'pending',
-  OWNER_APPROVED: 'owner_approved',
-  ADMIN_APPROVED: 'admin_approved',
-  REJECTED: 'rejected',
-  ACTIVE: 'active',
-  COMPLETED: 'completed',
-  CANCELLED: 'cancelled'
-};
+// Re-export all enums
+export {
+  BuildingType,
+  BuildingTypeLabels,
+  BuildingTypeKeys,
+  BuildingTypeByKey,
+} from '../enums/BuildingType';
 
-export const COMMISSION_TYPE = {
-  FROM_OWNER: 'from_owner',
-  FROM_TENANT: 'from_tenant',
-  FROM_BOTH: 'from_both'
-};
+export {
+  PropertyStatus,
+  PropertyStatusLabels,
+  PropertyStatusKeys,
+  PropertyStatusByKey,
+} from '../enums/PropertyStatus';
 
-export const IDENTITY_TYPE = {
-  SYRIAN: 'syrian',
-  PASSPORT: 'passport'
-};
+export {
+  BookingStatus,
+  BookingStatusLabels,
+  BookingStatusColors,
+} from '../enums/BookingStatus';
 
-export const PAYMENT_METHOD = {
+export {
+  CommissionType,
+  CommissionTypeLabels,
+} from '../enums/CommissionType';
+
+export {
+  IdentityType,
+  IdentityTypeLabels,
+  IdentityTypeFlags,
+} from '../enums/IdentityType';
+
+export {
+  UserRole,
+  UserRoleLabels,
+  UserRoleColors,
+} from '../enums/UserRole';
+
+export {
+  City,
+  CitiesList,
+  extractCity,
+} from '../enums/City';
+
+export { LoginMethod } from '../enums/LoginMethod';
+export { OwnerType, OwnerTypeLabels } from '../enums/OwnerType';
+export { CustomerType, CustomerTypeLabels } from '../enums/CustomerType';
+
+// ─── Legacy aliases (keep old imports working) ───
+export const PROPERTY_STATUS = PropertyStatusKeys;
+export const BOOKING_STATUS = BookingStatus;
+export const COMMISSION_TYPE = CommissionType;
+export const IDENTITY_TYPE = IdentityType;
+export const CITIES = City;
+
+// ─── Misc constants ───
+export const PAYMENT_METHOD = Object.freeze({
   CASH: 'cash',
-  ELECTRONIC: 'electronic'
-};
+  ELECTRONIC: 'electronic',
+});
 
-export const CITIES = {
-  DAMASCUS: 'damascus',
-  ALEPPO: 'aleppo',
-  HOMS: 'homs',
-  LATTAKIA: 'latakia',
-  DARAA: 'daraa'
-};
-
-export const DEFAULT_COMMISSION_RATE = 5; 
+export const DEFAULT_COMMISSION_RATE = 5;