[Bug]: Widget is permanently stuck in Dark Mode

[xmha97]

Description:
The app widget always renders in dark mode, regardless of the system-wide theme settings or the app's current dark/light mode configuration.

Steps to Reproduce:

1. Set the Android system theme to Light Mode.
2. Add the KashCal widget to the home screen.
3. Observe that the widget remains in dark theme.

Expected Behavior:
The widget should dynamically respect and follow the system's current theme (switching properly between light and dark modes) or adhere to the user's explicit appearance settings inside the app.