Updated libs - Updated Zod v3 to v4.

src/components/Rooms/room-booking.tsx

@@ -61,10 +61,11 @@ function RoomBooking({
 
   const totalSelected = () => {
     let sum = 0;
-    bookingRooms &&
+    if (bookingRooms) {
       bookingRooms.rooms
         .filter((v) => v.roomCategory == roomCategoryId)
         .forEach((v) => (sum += v.amount));
+    }
     return sum;
   };
   const canAddMore: boolean = availableAmount > totalSelected();

src/model/FormSchema.ts

@@ -1,10 +1,10 @@
 "use client";
 
-import { z } from "zod";
+import { z } from "zod/v4";
 
 export const BookingFormSchema = z.object({
   name: z.string().min(2).max(50),
   surname: z.string().min(2).max(50),
-  email: z.string().email(),
+  email: z.email(),
   phone: z.string().min(8),
 });

src/routes/book-page.tsx

@@ -17,7 +17,7 @@ import { useAppStore } from "@/store";
 import { useState } from "react";
 import { useForm } from "react-hook-form";
 import { useNavigate } from "react-router-dom";
-import { z } from "zod";
+import { z } from "zod/v4";
 import { zodResolver } from "@hookform/resolvers/zod";
 
 enum PageState {