chore: improve toast and show once

src/private/mongo/Admin.jsx

@@ -1,5 +1,5 @@
 import SectionContainer from '../../components/SectionContainer';
-import { useEffect, useState } from 'react';
+import { useEffect, useState, useRef } from 'react';
 import { DataGrid } from '@mui/x-data-grid';
 import { Typography, Button, Dialog, DialogTitle, DialogContent, IconButton, Box } from '@mui/material';
 import EditRoundedIcon from '@mui/icons-material/EditRounded';
@@ -42,11 +42,14 @@ export default function Admin() {
     const [rowToDelete, setRowToDelete] = useState(null);
     const { handleError } = useApiToast();
 
-    useEffect(() => {
-        let isMounted = true;
-        loadData();
-        return () => { isMounted = false };
-    }, []);
+const hasLoaded = useRef(false);
+
+useEffect(() => {
+  if (!hasLoaded.current) {
+    loadData();
+    hasLoaded.current = true;
+  }
+}, []);
 
     const handleEditClick = (params) => {
         setEditingData(params.row);