Feature Request: Enhanced Checkbox Functionality and Mobile Support

[DaxtonD]

Checkbox Indentation Consistency:
Currently, checkboxes can be indented on the web app, but this functionality is missing on the Android mobile app. Please add support for checkbox indentation in the mobile app to maintain feature parity.
Parent-Child Checkbox Behavior:
When a top-level (parent) checkbox is checked, its indented child checkboxes remain unchecked. It would greatly improve usability if checking a parent checkbox automatically checks all its child checkboxes.
Dedicated Completed Items Area:
It would be helpful to have a separate "Completed" section or area where all checked items are moved. This separation improves clarity by distinguishing completed tasks from those still pending. Additionally, if a completed (checked) item is unchecked, it should automatically move back to the active (unchecked) area.
Mobile Drag & Drop:
The mobile app currently lacks the ability to reorder checkboxes via drag & drop. Implementing these features on mobile would improve workflow flexibility and consistency with the web app.