[BUG] Keyboard settings screen is in dark mode

Checks

• I have read the FAQ section, searched the open issues, and still think this is a new bug.

Describe the bug you encountered:

The settings -> app settings -> keyboard settings screen is, by default, in dark mode even when the phone and the rest of the app is in light mode. For those of us who can't use dark mode due to eye problems this makes it very painful to use.

This occurs if the app theme (settings -> app settings -> Display -> Design) is set to the default (System settings), due to this not being in the logic when it decides the theme for just that screen.

Exert from /src/java/KP2ASoftkeyboard_AS/app/src/main/java/keepass2android/softkeyboard/Design.java:

public class Design {
	@SuppressLint("InlinedApi")
	public static void updateTheme(Activity activity, SharedPreferences prefs) {
		
		if (android.os.Build.VERSION.SDK_INT >= 11
            /* android.os.Build.VERSION_CODES.HONEYCOMB */) {
            String design = prefs.getString("design_key", "Light");
            
            if (design.equals("Light")) {
            	activity.setTheme(android.R.style.Theme_Holo_Light);
            } else {
            	activity.setTheme(android.R.style.Theme_Holo);
            }
        }
    }
}

If design_key != 'Light' then the theme will be set to dark mode. Of course, the default will be "System settings" and it will chose dark mode.

Describe what you expected to happen:

That the keyboard settings screen follows the system theme mode (in my case light mode).

What version of Keepass2Android are you using?

1.12-r5

Which version of Android are you on?

Occurs on Android 14 and 15

Start with src/java/KP2ASoftkeyboard_AS/app/src/main/java/keepass2android/softkeyboard/Design.java and its updateTheme method, then reproduce the keyboard settings path with the app theme set to System settings. Done means the keyboard settings screen follows the system light or dark theme instead of defaulting to dark mode.