Top Up Balance logic and Added fixes for routing

frontend/pweb/lib/pages/dashboard/buttons/balance/carousel.dart

@@ -12,11 +12,13 @@ import 'package:pweb/providers/carousel.dart';
 class WalletCarousel extends StatefulWidget {
   final List<Wallet> wallets;
   final ValueChanged<Wallet> onWalletChanged;
+  final ValueChanged<Wallet> onTopUp;
 
   const WalletCarousel({
     super.key,
     required this.wallets,
     required this.onWalletChanged,
+    required this.onTopUp,
   });
 
   @override
@@ -33,6 +35,11 @@ class _WalletCarouselState extends State<WalletCarousel> {
     _pageController = PageController(
       viewportFraction: WalletCardConfig.viewportFraction,
     );
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      if (widget.wallets.isNotEmpty) {
+        widget.onWalletChanged(widget.wallets[_currentPage]);
+      }
+    });
   }
 
   @override
@@ -83,7 +90,10 @@ class _WalletCarouselState extends State<WalletCarousel> {
             itemBuilder: (context, index) {
               return Padding(
                 padding: WalletCardConfig.cardPadding,
-                child: WalletCard(wallet: widget.wallets[index]),
+                child: WalletCard(
+                  wallet: widget.wallets[index],
+                  onTopUp: () => widget.onTopUp(widget.wallets[index]),
+                ),
               );
             },
           ),
@@ -110,4 +120,4 @@ class _WalletCarouselState extends State<WalletCarousel> {
       ],
     );
   }
-}
+}