fix(admin): resolver pantalla en blanco al editar ficha de usuario (GET /admin/users/edit/:id)

backend/app/routes/api/admin.py

@@ -345,6 +345,20 @@ def create_user():
         'user': user.to_dict()
     }), 201
 
+@api_admin_bp.route('/users/<int:id>', methods=['GET'])
+@jwt_required
+def get_user_by_id(id):
+    user = User.query.get_or_404(id)
+    d = user.to_dict()
+    d['role_obj'] = {
+        'id': user.role_obj.id,
+        'name': user.role_obj.name
+    } if user.role_obj else {'id': 1, 'name': user.role or 'Admin'}
+    return jsonify({
+        'status': 'success',
+        'user': d
+    }), 200
+
 @api_admin_bp.route('/users/<int:id>', methods=['PUT'])
 @jwt_required
 def update_user(id):