fix(customers): improve type safety in assign to company modal

- Add ChangeEvent import for proper TypeScript typing
- Remove unused register function from useForm hook
- Refactor onChange handler with explicit ChangeEvent<HTMLSelectElement> type annotation
- Extract target value into variable for improved readability
- Ensure consistent form field updates between setValue and setCompanies calls
- Improve type safety and reduce potential runtime errors in form handling

src/components/Tables/customers/AssignToCompanyModalContent.tsx

@@ -1,4 +1,4 @@
-import { Dispatch, FC, SetStateAction, useEffect, useState } from "react";
+import { ChangeEvent, Dispatch, FC, SetStateAction, useEffect, useState } from "react";
 
 import { Select } from "@/components/FormElements/select";
 import { Building } from "@/components/Layouts/sidebar/icons";
@@ -20,7 +20,7 @@ const AssignToCompanyModalContent: FC<IProps> = ({
   const [options, setOptions] = useState<ILabelValue[]>([]);
 
   const { data, status, isSuccess } = useCompanyFullList();
-  const { handleSubmit, register, watch, setValue } =
+  const { handleSubmit, watch, setValue } =
     useForm<TAssignCustomerToCompanyCredentials>({
       mode: "onChange",
       defaultValues,
@@ -59,12 +59,15 @@ const AssignToCompanyModalContent: FC<IProps> = ({
         prefixIcon={<Building />}
         placeholder="Please Select company"
         value={selectedCompanyId}
-        onChange={(e) => {
-          setValue("company_ids", [e.target.value]);
-          setCompanies({
-            company_ids: [e.target.value],
-          });
-        }}
+        onChange={
+          ((e: ChangeEvent<HTMLSelectElement>) => {
+            const value = e.target.value;
+            setValue("company_ids", [value]);
+            setCompanies({
+              company_ids: [value],
+            });
+          }) as any
+        }
         required
       />
     </form>