fix(FormFooter, useCreateCustomerPresenter): disable submit button during mutation

- Added a disabled state to the submit button in FormFooter to prevent multiple submissions while a mutation is in progress.
- Included a blank line in useCreateCustomerPresenter for improved code readability.

src/components/forms/customers/useCreateCustomerPresenter.ts

@@ -31,6 +31,7 @@ const useCreateCustomerPresenter = ({
     mode: "onChange",
     defaultValues,
   });
+
   const router = useRouter();
   const { mutate: createCustomer, isPending: isCreating } = useCreateCustomer();
   const { mutate: updateCustomer, isPending: isUpdating } = useUpdateCustomer(

src/components/ui/FormFooter.tsx

@@ -13,6 +13,7 @@ const FormFooter = ({ onCancel }: IProps) => {
     <div className="col-span-2 flex gap-6">
       <button
         type="submit"
+        disabled={isMutating > 0}
         className="mt-6 flex w-fit items-center justify-center rounded-lg bg-primary p-[13px] font-medium text-white hover:bg-opacity-90"
       >
         {isMutating ? (