Fix superadmin access control and modal aria-hidden warning

- Implement role normalization system to handle role name variants (superadmin, super_admin, administrator)
- Add session persistence configuration (PERMANENT_SESSION_LIFETIME = 7 days)
- Add modules JSON column to users database table schema
- Update setup script with backward compatibility check for modules column
- Fix user_management_simple route to properly fetch and display modules
- Resolve modal aria-hidden accessibility warning by managing focus on close button
- All changes deployed and tested successfully

py_app/app/templates/user_management_simple.html

@@ -949,7 +949,14 @@ function editUser(userId, username, role, modules) {
     
     updateEditModuleSelection();
     
-    const modal = new bootstrap.Modal(document.getElementById('editUserModal'));
+    const modalElement = document.getElementById('editUserModal');
+    const modal = new bootstrap.Modal(modalElement);
+    
+    // Focus on the username field after modal is shown to avoid focus on close button
+    modalElement.addEventListener('shown.bs.modal', function() {
+        document.getElementById('edit_username').focus();
+    }, { once: true });
+    
     modal.show();
 }