chore(FE): Remove unused variables and imports across components

src/components/pages/master-data/product-category/ProductCategoryTable.tsx

@@ -1,12 +1,6 @@
 'use client';
 
-import {
-  ChangeEventHandler,
-  useEffect,
-  useMemo,
-  useRef,
-  useState,
-} from 'react';
+import { ChangeEventHandler, useEffect, useMemo, useState } from 'react';
 import { usePathname } from 'next/navigation';
 import useSWR from 'swr';
 import { CellContext, ColumnDef, SortingState } from '@tanstack/react-table';

src/components/pages/master-data/production-standard/form/ProductionStandardForm.tsx

@@ -178,14 +178,7 @@ const ProductionStandardForm = ({
   const router = useRouter();
 
   // ===== Store =====
-  const {
-    formData,
-    setFormData,
-    addDetail,
-    updateDetail,
-    deleteDetail,
-    clearCache,
-  } = useFormStore();
+  const { formData, setFormData, clearCache } = useFormStore();
 
   // ===== Formik =====
   // Initial values - only recalculate when initialValue changes (for edit/detail mode)