feat: Implement admin user management page with create/delete functionality, add a super-admin-only sidebar link, and expose isSuperAdmin in AuthContext.

src/context/AuthContext.tsx

@@ -8,6 +8,7 @@ interface AuthContextType {
   user: AuthUser | null;
   isLoading: boolean;
   isAuthenticated: boolean;
+  isSuperAdmin: boolean;
   login: (email: string, password: string) => Promise<void>;
   logout: () => Promise<void>;
   error: string | null;
@@ -25,7 +26,7 @@ export function AuthProvider({ children }: { children: React.ReactNode }) {
     try {
       const storedUser = authService.getStoredUser();
 
-      if (storedUser && storedUser.role === 'ADMIN') {
+      if (storedUser && (storedUser.role === 'ADMIN' || storedUser.role === 'SUPER_ADMIN')) {
         setUser(storedUser);
       } else if (storedUser) {
         // Not admin, clear storage
@@ -47,6 +48,13 @@ export function AuthProvider({ children }: { children: React.ReactNode }) {
     setError(null);
     try {
       const response = await authService.login({ email, password });
+
+      // Block non-admin users from admin panel
+      if (response.user.role !== 'ADMIN' && response.user.role !== 'SUPER_ADMIN') {
+        authService.clearAuth();
+        throw new Error('Access denied. Only admin users can login here.');
+      }
+
       setUser(response.user);
       router.push('/dashboard');
     } catch (err) {
@@ -71,6 +79,7 @@ export function AuthProvider({ children }: { children: React.ReactNode }) {
         user,
         isLoading,
         isAuthenticated: !!user,
+        isSuperAdmin: user?.role === 'SUPER_ADMIN',
         login,
         logout,
         error,