changed color theme to be black and added the ability to enter the amount in the recipient’s currency

frontend/pweb/lib/pages/2fa/input.dart

@@ -9,7 +9,10 @@ class TwoFactorCodeInput extends StatelessWidget {
   const TwoFactorCodeInput({super.key, required this.onCompleted});
 
   @override
-  Widget build(BuildContext context) => Center(
+  Widget build(BuildContext context){
+    final theme = Theme.of(context).colorScheme;
+    
+    return Center(
     child: ConstrainedBox(
       constraints: const BoxConstraints(maxWidth: 300),
       child: MaterialPinField(
@@ -21,13 +24,18 @@ class TwoFactorCodeInput extends StatelessWidget {
           shape: MaterialPinShape.outlined,
           borderRadius: BorderRadius.circular(4),
           cellSize: Size(40, 48),
-          borderColor: Theme.of(context).colorScheme.primaryContainer,
-          focusedBorderColor: Theme.of(context).colorScheme.primary,
-          cursorColor: Theme.of(context).colorScheme.primary,
+          borderColor: theme.primaryContainer.withValues(alpha: 0.2),
+          focusedBorderColor: theme.primary,
+          filledBorderColor: theme.primary,
+          cursorColor: theme.primary,
+          focusedFillColor: theme.onSecondary,
+          filledFillColor: theme.onSecondary,
+          fillColor: theme.onSecondary,
         ),
         onCompleted: onCompleted,
         onChanged: (_) {},
       ),
     ),
   );
+  }
 }