refactor: replace nanoid with Math.random() for ID generation and remove the react-native-get-random-values dependency.

src/context/AppContext.tsx

@@ -7,7 +7,6 @@
 import React, { createContext, useContext, useEffect, useMemo, useState } from 'react';
 import { Appointment, Barber, BarberShop, CartItem, Order, Product, Service, User, WaitlistEntry, AppNotification } from '../types';
 import { supabase } from '../lib/supabase';
-import { nanoid } from 'nanoid';
 import * as Notifications from 'expo-notifications';
 import * as Device from 'expo-device';
 import { Platform } from 'react-native';
@@ -218,7 +217,7 @@ export const AppProvider = ({ children }: { children: React.ReactNode }) => {
   };
 
   const register = (payload: any) => {
-    const id = nanoid();
+    const id = Math.random().toString(36).substring(2, 15);
     const newUser: User = { ...payload, id };
     setUser(newUser);
     return newUser;
@@ -242,7 +241,7 @@ export const AppProvider = ({ children }: { children: React.ReactNode }) => {
     }, 0);
 
     const newOrder: Order = {
-      id: nanoid(),
+      id: Math.random().toString(36).substring(2, 15),
       shopId,
       customerId,
       items: shopItems,