chore: Follow up popupmenu theme

lib/config/themes.dart

@@ -57,6 +57,9 @@ abstract class FluffyThemes {
           ? colorScheme.surfaceContainerHighest
           : colorScheme.surfaceContainer,
       popupMenuTheme: PopupMenuThemeData(
+        color: colorScheme.surfaceContainerLow,
+        iconColor: colorScheme.onSurface,
+        textStyle: TextStyle(color: colorScheme.onSurface),
         shape: RoundedRectangleBorder(
           borderRadius: BorderRadius.circular(AppConfig.borderRadius / 2),
         ),