chore: fix formatting and lint errors across Makefile, backend, and adminfront

This commit addresses several linting and formatting issues that caused CI checks to fail:
- Makefile: Removed obsolete '--organize-imports-enabled' from Biome and switched to '@biomejs/biome'.
- backend: Fixed spacing and alignment issues according to gofmt.
- adminfront: Fixed multiple unused variables and imports, and configured unsafe fixes in the Biome config to remove dead code.

adminfront/src/features/users/UserListPage.tsx

@@ -13,7 +13,6 @@ import {
   ChevronDown,
   ChevronLeft,
   ChevronRight,
-  Download,
   FileDown,
   FileSpreadsheet,
   LayoutDashboard,
@@ -268,7 +267,7 @@ const UserListSearchControls = React.memo(function UserListSearchControls({
 });
 
 function UserListPage() {
-  const navigate = useNavigate();
+  const _navigate = useNavigate();
   const [page, setPage] = React.useState(1);
   const [search, setSearch] = React.useState("");
   const [selectedCompany, setSelectedCompany] = React.useState<string>("");
@@ -563,7 +562,7 @@ function UserListPage() {
     },
   });
 
-  const handleApplyBulkStatus = () => {
+  const _handleApplyBulkStatus = () => {
     if (selectedUserIds.length === 0 || !selectedBulkStatus) return;
     bulkUpdateMutation.mutate({
       userIds: selectedUserIds,
@@ -571,7 +570,7 @@ function UserListPage() {
     });
   };
 
-  const handleApplyBulkPermission = () => {
+  const _handleApplyBulkPermission = () => {
     if (selectedUserIds.length === 0 || !selectedBulkPermission) return;
     bulkUpdateMutation.mutate({
       userIds: selectedUserIds,
@@ -594,7 +593,7 @@ function UserListPage() {
     }
   };
 
-  const handleDelete = (userId: string, userName: string) => {
+  const _handleDelete = (userId: string, userName: string) => {
     if (
       !window.confirm(
         t(