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/__init__.py

@@ -5,6 +5,13 @@ def create_app():
     app = Flask(__name__)
     app.config['SECRET_KEY'] = 'your_secret_key'
     
+    # Configure session persistence
+    from datetime import timedelta
+    app.config['PERMANENT_SESSION_LIFETIME'] = timedelta(days=7)
+    app.config['SESSION_COOKIE_SECURE'] = False  # Set to True in production with HTTPS
+    app.config['SESSION_COOKIE_HTTPONLY'] = True
+    app.config['SESSION_COOKIE_SAMESITE'] = 'Lax'
+    
     # Set max upload size to 10GB for large database backups
     app.config['MAX_CONTENT_LENGTH'] = 10 * 1024 * 1024 * 1024  # 10GB