Refactor employee management

src/App.tsx

@@ -31,6 +31,11 @@ const AdminRoutes = () => {
   return <AdminLayout />;
 };
 
+const AdminIndexRedirect = () => {
+  const user = authApi.getCurrentUser();
+  return <Navigate to={user?.role === 'technician' ? 'aftersales' : 'dashboard'} replace />;
+};
+
 function App() {
   return (
     <BrowserRouter>
@@ -46,7 +51,7 @@ function App() {
 
         <Route element={<PrivateRoute />}>
           <Route element={<AdminRoutes />}>
-            <Route path="/admin" element={<Navigate to="dashboard" replace />} />
+            <Route path="/admin" element={<AdminIndexRedirect />} />
             <Route path="/admin/dashboard" element={<DashboardPage />} />
             <Route path="/admin/manage" element={<ManagePage />} />
             <Route path="/admin/employee-serials" element={<EmployeeSerialsPage />} />