feat: add enable/disable toggle for chore scheduling in ScheduleModal

- Introduced a toggle button to enable or disable chores in the scheduler.
- The toggle will be available in both types of schedulers.
- Added UI design proposal and considerations for mobile dimensions.
- Included E2E tests to ensure toggle state persistence and correct behavior in child view.

backend/api/chore_schedule_api.py

@@ -54,6 +54,10 @@ def set_chore_schedule(child_id, task_id):
     if mode not in ('days', 'interval'):
         return jsonify({'error': 'mode must be "days" or "interval"', 'code': ErrorCodes.INVALID_VALUE}), 400
 
+    enabled = data.get('enabled', True)
+    if not isinstance(enabled, bool):
+        return jsonify({'error': 'enabled must be a boolean', 'code': ErrorCodes.INVALID_VALUE}), 400
+
     if mode == 'days':
         day_configs = data.get('day_configs', [])
         if not isinstance(day_configs, list):
@@ -69,6 +73,7 @@ def set_chore_schedule(child_id, task_id):
             default_hour=default_hour,
             default_minute=default_minute,
             default_has_deadline=default_has_deadline,
+            enabled=enabled,
         )
     else:
         interval_days = data.get('interval_days', 2)
@@ -91,6 +96,7 @@ def set_chore_schedule(child_id, task_id):
             interval_has_deadline=interval_has_deadline,
             interval_hour=interval_hour,
             interval_minute=interval_minute,
+            enabled=enabled,
         )
 
     delete_extension_for_child_task(child_id, task_id)