fix: Updating ui and other elements

backend/middleware/roleCheck.js

@@ -0,0 +1,20 @@
+const User = require('../models/User');
+
+// Middleware to check if user is admin
+exports.isAdmin = async (req, res, next) => {
+  try {
+    const user = await User.findById(req.user.userId);
+    if (!user) {
+      return res.status(404).json({ message: 'User not found' });
+    }
+
+    if (user.role !== 'admin') {
+      return res.status(403).json({ message: 'Access denied. Admin only.' });
+    }
+
+    next();
+  } catch (error) {
+    console.error('Role check error:', error);
+    res.status(500).json({ message: 'Server error during role check' });
+  }
+};