feat(admin): add add-music api

src/middlewares/roles.js

@@ -0,0 +1,18 @@
+import User from '../models/User.js';
+
+export const requireAdmin = async (req, res, next) => {
+  try {
+    if (!req.userId) {
+      return res.status(401).json({ success: false, message: 'Unauthorized' });
+    }
+
+    const user = await User.findById(req.userId).select('role').lean();
+    if (!user || user.role !== 'admin') {
+      return res.status(403).json({ success: false, message: 'Forbidden' });
+    }
+
+    return next();
+  } catch (error) {
+    return next(error);
+  }
+};