update

lib/app/theme.dart

@@ -104,38 +104,41 @@ class AppTheme {
   static ThemeData get lightTheme {
     final base = ThemeData.light(useMaterial3: true);
     final textTheme = GoogleFonts.poppinsTextTheme(base.textTheme).apply(
-      bodyColor: const Color(0xFF1A1A24),
+      bodyColor: const Color(0xFF1A1A2E),
-      displayColor: const Color(0xFF1A1A24),
+      displayColor: const Color(0xFF1A1A2E),
     );
 
     return base.copyWith(
       textTheme: textTheme,
-      scaffoldBackgroundColor: const Color(0xFFF5F5F5),
+      scaffoldBackgroundColor: const Color(0xFFF0F0F7),
       colorScheme: const ColorScheme.light(
         surface: Colors.white,
         primary: AppColors.accent,
         secondary: AppColors.accent,
         onPrimary: Colors.white,
-        onSurface: Color(0xFF1A1A24),
+        onSurface: Color(0xFF1A1A2E),
+        onBackground: Color(0xFF1A1A2E),
+        background: Color(0xFFF0F0F7),
       ),
       cardTheme: CardThemeData(
         color: Colors.white,
-        elevation: 0,
+        elevation: 2,
         shape: RoundedRectangleBorder(
           borderRadius: BorderRadius.circular(16),
         ),
         margin: EdgeInsets.zero,
       ),
       appBarTheme: AppBarTheme(
-        backgroundColor: const Color(0xFFF5F5F5),
+        backgroundColor: Colors.white,
+        foregroundColor: const Color(0xFF1A1A2E),
         elevation: 0,
         centerTitle: false,
         titleTextStyle: GoogleFonts.poppins(
-          color: const Color(0xFF1A1A24),
+          color: const Color(0xFF1A1A2E),
           fontSize: 20,
           fontWeight: FontWeight.w600,
         ),
-        iconTheme: const IconThemeData(color: Color(0xFF1A1A24)),
+        iconTheme: const IconThemeData(color: AppColors.accent),
       ),
       navigationBarTheme: NavigationBarThemeData(
         backgroundColor: Colors.white,
@@ -149,7 +152,7 @@ class AppTheme {
             );
           }
           return GoogleFonts.poppins(
-            color: const Color(0xFF666666),
+            color: const Color(0xFF9999BB),
             fontSize: 12,
           );
         }),
@@ -157,26 +160,26 @@ class AppTheme {
           if (states.contains(WidgetState.selected)) {
             return const IconThemeData(color: AppColors.accent);
           }
-          return const IconThemeData(color: Color(0xFF666666));
+          return const IconThemeData(color: Color(0xFF9999BB));
         }),
       ),
       inputDecorationTheme: InputDecorationTheme(
         filled: true,
-        fillColor: Colors.white,
+        fillColor: const Color(0xFFEEEEF8),
         border: OutlineInputBorder(
-          borderRadius: BorderRadius.circular(12),
+          borderRadius: BorderRadius.circular(8),
-          borderSide: const BorderSide(color: Color(0xFFE0E0E0)),
+          borderSide: BorderSide.none,
         ),
         enabledBorder: OutlineInputBorder(
-          borderRadius: BorderRadius.circular(12),
+          borderRadius: BorderRadius.circular(8),
-          borderSide: const BorderSide(color: Color(0xFFE0E0E0)),
+          borderSide: BorderSide.none,
         ),
         focusedBorder: OutlineInputBorder(
-          borderRadius: BorderRadius.circular(12),
+          borderRadius: BorderRadius.circular(8),
           borderSide: const BorderSide(color: AppColors.accent, width: 1.5),
         ),
-        labelStyle: const TextStyle(color: Color(0xFF666666)),
+        labelStyle: const TextStyle(color: Color(0xFF9999BB)),
-        hintStyle: const TextStyle(color: Color(0xFF999999)),
+        hintStyle: const TextStyle(color: Color(0xFF9999BB)),
       ),
       elevatedButtonTheme: ElevatedButtonThemeData(
         style: ElevatedButton.styleFrom(
@@ -193,9 +196,17 @@ class AppTheme {
         ),
       ),
       dividerTheme: const DividerThemeData(
-        color: Color(0xFFE0E0E0),
+        color: Color(0xFFDDDDEE),
         thickness: 1,
       ),
+      iconTheme: const IconThemeData(color: AppColors.accent),
+      chipTheme: ChipThemeData(
+        backgroundColor: const Color(0xFFEEEEF8),
+        selectedColor: AppColors.accent,
+        labelStyle: GoogleFonts.poppins(
+          color: const Color(0xFF1A1A2E),
+        ),
+      ),
     );
   }
 }

lib/features/add_transaction/screen.dart

@@ -26,10 +26,16 @@ class _AddTransactionScreenState extends ConsumerState<AddTransactionScreen> {
   final _formKey = GlobalKey<FormState>();
   final _amountController = TextEditingController();
   final _noteController = TextEditingController();
+  late FocusNode _amountFocusNode;
+  bool _amountFocused = false;
 
   @override
   void initState() {
     super.initState();
+    _amountFocusNode = FocusNode();
+    _amountFocusNode.addListener(() {
+      setState(() => _amountFocused = _amountFocusNode.hasFocus);
+    });
     if (widget.initial != null) {
       _amountController.text = widget.initial!.amount.toString();
       _noteController.text = widget.initial!.note ?? '';
@@ -40,6 +46,7 @@ class _AddTransactionScreenState extends ConsumerState<AddTransactionScreen> {
   void dispose() {
     _amountController.dispose();
     _noteController.dispose();
+    _amountFocusNode.dispose();
     super.dispose();
   }
 
@@ -100,13 +107,46 @@ class _AddTransactionScreenState extends ConsumerState<AddTransactionScreen> {
     final currencyInfo = ref.watch(currencyProvider);
 
     return Scaffold(
-      backgroundColor: AppColors.background,
+      backgroundColor: Theme.of(context).scaffoldBackgroundColor,
       appBar: AppBar(
         title: Text(state.isEditing ? 'Edit Transaction' : 'Add Transaction'),
         leading: IconButton(
           icon: const Icon(Icons.close_rounded),
           onPressed: () => context.pop(),
         ),
+        actions: [
+          if (state.isEditing)
+            IconButton(
+              icon: const Icon(Icons.delete_outline_rounded),
+              color: const Color(0xFFE05C6B),
+              onPressed: () {
+                showDialog(
+                  context: context,
+                  builder: (ctx) => AlertDialog(
+                    title: const Text('Delete transaction?'),
+                    content: const Text('This action cannot be undone.'),
+                    actions: [
+                      TextButton(
+                        onPressed: () => Navigator.pop(ctx),
+                        child: const Text('Cancel'),
+                      ),
+                      TextButton(
+                        onPressed: () {
+                          ref.read(transactionsProvider.notifier).delete(widget.initial!.id);
+                          Navigator.pop(ctx);
+                          context.pop();
+                        },
+                        style: TextButton.styleFrom(
+                          foregroundColor: const Color(0xFFE05C6B),
+                        ),
+                        child: const Text('Delete'),
+                      ),
+                    ],
+                  ),
+                );
+              },
+            ),
+        ],
       ),
       body: SafeArea(
         child: Form(
@@ -125,24 +165,47 @@ class _AddTransactionScreenState extends ConsumerState<AddTransactionScreen> {
               // Amount
               _SectionLabel('Amount'),
               const SizedBox(height: 8),
-              TextFormField(
+              Container(
+                decoration: BoxDecoration(
+                  color: Theme.of(context).inputDecorationTheme.fillColor,
+                  borderRadius: BorderRadius.circular(12),
+                  border: Border.all(
+                    color: _amountFocused ? Theme.of(context).colorScheme.primary : Colors.transparent,
+                    width: 1.5,
+                  ),
+                ),
+                child: Row(
+                  children: [
+                    Padding(
+                      padding: const EdgeInsets.symmetric(horizontal: 12),
+                      child: Text(
+                        currencyInfo.symbol,
+                        style: TextStyle(
+                          fontSize: 20,
+                          fontWeight: FontWeight.w600,
+                          color: Theme.of(context).colorScheme.onSurface,
+                        ),
+                      ),
+                    ),
+                    Expanded(
+                      child: TextFormField(
                         controller: _amountController,
+                        focusNode: _amountFocusNode,
                         keyboardType: const TextInputType.numberWithOptions(decimal: true),
                         inputFormatters: [
                           FilteringTextInputFormatter.allow(RegExp(r'^\d+\.?\d{0,2}')),
                         ],
                         style: Theme.of(context).textTheme.headlineSmall?.copyWith(
-                      color: AppColors.textPrimary,
+                              color: Theme.of(context).colorScheme.onSurface,
-                      fontWeight: FontWeight.w600,
-                    ),
-                decoration: InputDecoration(
-                  prefixText: '${currencyInfo.symbol} ',
-                  prefixStyle: const TextStyle(
-                    color: AppColors.textPrimary,
-                    fontSize: 20,
                               fontWeight: FontWeight.w600,
                             ),
+                        decoration: const InputDecoration(
                           hintText: '0.00',
+                          border: InputBorder.none,
+                          enabledBorder: InputBorder.none,
+                          focusedBorder: InputBorder.none,
+                          filled: false,
+                          contentPadding: EdgeInsets.symmetric(horizontal: 0, vertical: 16),
                         ),
                         onChanged: (v) {
                           final parsed = double.tryParse(v);
@@ -155,6 +218,10 @@ class _AddTransactionScreenState extends ConsumerState<AddTransactionScreen> {
                           return null;
                         },
                       ),
+                    ),
+                  ],
+                ),
+              ),
               const SizedBox(height: 20),
 
               // Category
@@ -177,19 +244,19 @@ class _AddTransactionScreenState extends ConsumerState<AddTransactionScreen> {
                 child: Container(
                   padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
                   decoration: BoxDecoration(
-                    color: AppColors.surface,
+                    color: Theme.of(context).colorScheme.surface,
                     borderRadius: BorderRadius.circular(12),
-                    border: Border.all(color: AppColors.divider),
+                    border: Border.all(color: Theme.of(context).dividerColor),
                   ),
                   child: Row(
                     children: [
-                      const Icon(Icons.calendar_today_rounded,
+                      Icon(Icons.calendar_today_rounded,
-                          color: AppColors.textSecondary, size: 18),
+                          color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6), size: 18),
                       const SizedBox(width: 10),
                       Text(
                         DateFormat('MMMM d, yyyy').format(state.date),
                         style: Theme.of(context).textTheme.bodyMedium?.copyWith(
-                              color: AppColors.textPrimary,
+                              color: Theme.of(context).colorScheme.onSurface,
                             ),
                       ),
                     ],
@@ -242,7 +309,7 @@ class _SectionLabel extends StatelessWidget {
     return Text(
       text,
       style: Theme.of(context).textTheme.bodySmall?.copyWith(
-            color: AppColors.textSecondary,
+            color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
             fontWeight: FontWeight.w600,
             letterSpacing: 0.5,
           ),
@@ -259,9 +326,9 @@ class _TypeToggle extends StatelessWidget {
   Widget build(BuildContext context) {
     return Container(
       decoration: BoxDecoration(
-        color: AppColors.surface,
+        color: Theme.of(context).colorScheme.surface,
         borderRadius: BorderRadius.circular(14),
-        border: Border.all(color: AppColors.divider),
+        border: Border.all(color: Theme.of(context).dividerColor),
       ),
       child: Row(
         children: [
@@ -314,12 +381,12 @@ class _TypeOption extends StatelessWidget {
           child: Row(
             mainAxisAlignment: MainAxisAlignment.center,
             children: [
-              Icon(icon, color: isSelected ? color : AppColors.textSecondary, size: 18),
+              Icon(icon, color: isSelected ? color : Theme.of(context).colorScheme.onSurface.withOpacity(0.6), size: 18),
               const SizedBox(width: 6),
               Text(
                 label,
                 style: Theme.of(context).textTheme.bodyMedium?.copyWith(
-                      color: isSelected ? color : AppColors.textSecondary,
+                      color: isSelected ? color : Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                       fontWeight: isSelected ? FontWeight.w600 : FontWeight.normal,
                     ),
               ),
@@ -356,22 +423,22 @@ class _CategoryPicker extends StatelessWidget {
             duration: const Duration(milliseconds: 200),
             padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 10),
             decoration: BoxDecoration(
-              color: isSelected ? color.withOpacity(0.2) : AppColors.surface,
+              color: isSelected ? color.withOpacity(0.2) : Theme.of(context).colorScheme.surface,
               borderRadius: BorderRadius.circular(12),
               border: Border.all(
-                color: isSelected ? color : AppColors.divider,
+                color: isSelected ? color : Theme.of(context).dividerColor,
                 width: isSelected ? 1.5 : 1,
               ),
             ),
             child: Row(
               mainAxisSize: MainAxisSize.min,
               children: [
-                Icon(icon, color: isSelected ? color : AppColors.textSecondary, size: 16),
+                Icon(icon, color: isSelected ? color : Theme.of(context).colorScheme.onSurface.withOpacity(0.6), size: 16),
                 const SizedBox(width: 6),
                 Text(
                   cat,
                   style: Theme.of(context).textTheme.bodySmall?.copyWith(
-                        color: isSelected ? color : AppColors.textSecondary,
+                        color: isSelected ? color : Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                         fontWeight: isSelected ? FontWeight.w600 : FontWeight.normal,
                       ),
                 ),

lib/features/dashboard/screen.dart

@@ -37,7 +37,7 @@ class _DashboardScreenState extends ConsumerState<DashboardScreen> {
     final budgetExceeded = budget != null && monthExpense > budget;
 
     return Scaffold(
-      backgroundColor: AppColors.background,
+      backgroundColor: Theme.of(context).scaffoldBackgroundColor,
       appBar: AppBar(
         title: Row(
           children: [
@@ -49,13 +49,13 @@ class _DashboardScreenState extends ConsumerState<DashboardScreen> {
                     'My Finances',
                     style: Theme.of(context).textTheme.titleLarge?.copyWith(
                           fontWeight: FontWeight.w700,
-                          color: AppColors.textPrimary,
+                          color: Theme.of(context).colorScheme.onSurface,
                         ),
                   ),
                   Text(
                     DateFormat('MMMM yyyy').format(DateTime.now()),
                     style: Theme.of(context).textTheme.bodySmall?.copyWith(
-                          color: AppColors.textSecondary,
+                          color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                         ),
                   ),
                 ],
@@ -75,7 +75,7 @@ class _DashboardScreenState extends ConsumerState<DashboardScreen> {
       ),
       body: SafeArea(
         child: CustomScrollView(
-          cacheExtent: 500,
+          cacheExtent: 300,
           slivers: [
             SliverToBoxAdapter(
               child: Padding(
@@ -103,7 +103,7 @@ class _DashboardScreenState extends ConsumerState<DashboardScreen> {
                       'Transactions',
                       style: Theme.of(context).textTheme.titleMedium?.copyWith(
                             fontWeight: FontWeight.w600,
-                            color: AppColors.textPrimary,
+                            color: Theme.of(context).colorScheme.onSurface,
                           ),
                     ),
                     const SizedBox(height: 12),
@@ -119,16 +119,14 @@ class _DashboardScreenState extends ConsumerState<DashboardScreen> {
             else
               SliverPadding(
                 padding: const EdgeInsets.fromLTRB(20, 0, 20, 100),
-                sliver: SliverList(
+                sliver: SliverList.builder(
-                  delegate: SliverChildBuilderDelegate(
+                  itemCount: recent.length,
-                    (context, i) => Padding(
+                  itemBuilder: (context, i) => Padding(
                     padding: const EdgeInsets.only(bottom: 10),
-                      child: _TransactionTile(
+                    child: RepaintBoundary(
-                        transaction: recent[i],
+                      child: _TransactionTile(transaction: recent[i]),
                     ),
                   ),
-                    childCount: recent.length,
-                  ),
                 ),
               ),
           ],
@@ -149,11 +147,11 @@ class _SearchBar extends StatelessWidget {
       controller: controller,
       decoration: InputDecoration(
         hintText: 'Search transactions...',
-        prefixIcon: const Icon(Icons.search_rounded, color: AppColors.textSecondary),
+        prefixIcon: Icon(Icons.search_rounded, color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6)),
         suffixIcon: controller.text.isNotEmpty
             ? IconButton(
                 icon: const Icon(Icons.clear_rounded, size: 20),
-                color: AppColors.textSecondary,
+                color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                 onPressed: () {
                   controller.clear();
                   ref.read(searchQueryProvider.notifier).state = '';
@@ -221,17 +219,17 @@ class _FilterChip extends StatelessWidget {
         duration: const Duration(milliseconds: 200),
         padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 8),
         decoration: BoxDecoration(
-          color: isSelected ? chipColor.withOpacity(0.2) : AppColors.surface,
+          color: isSelected ? chipColor.withOpacity(0.2) : Theme.of(context).colorScheme.surface,
           borderRadius: BorderRadius.circular(20),
           border: Border.all(
-            color: isSelected ? chipColor : AppColors.divider,
+            color: isSelected ? chipColor : Theme.of(context).dividerColor,
             width: isSelected ? 1.5 : 1,
           ),
         ),
         child: Text(
           label,
           style: Theme.of(context).textTheme.bodySmall?.copyWith(
-                color: isSelected ? chipColor : AppColors.textSecondary,
+                color: isSelected ? chipColor : Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                 fontWeight: isSelected ? FontWeight.w600 : FontWeight.normal,
               ),
         ),
@@ -258,9 +256,9 @@ class _BudgetProgress extends StatelessWidget {
     return Container(
       padding: const EdgeInsets.all(16),
       decoration: BoxDecoration(
-        color: AppColors.surface,
+        color: Theme.of(context).colorScheme.surface,
         borderRadius: BorderRadius.circular(16),
-        border: Border.all(color: AppColors.divider),
+        border: Border.all(color: Theme.of(context).dividerColor),
       ),
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
@@ -271,7 +269,7 @@ class _BudgetProgress extends StatelessWidget {
               Text(
                 'Monthly Budget',
                 style: Theme.of(context).textTheme.bodyMedium?.copyWith(
-                      color: AppColors.textSecondary,
+                      color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                     ),
               ),
               Text(
@@ -288,7 +286,7 @@ class _BudgetProgress extends StatelessWidget {
             borderRadius: BorderRadius.circular(8),
             child: LinearProgressIndicator(
               value: ratio.clamp(0.0, 1.0),
-              backgroundColor: AppColors.divider,
+              backgroundColor: Theme.of(context).dividerColor,
               valueColor: AlwaysStoppedAnimation<Color>(color),
               minHeight: 8,
             ),
@@ -300,13 +298,13 @@ class _BudgetProgress extends StatelessWidget {
               Text(
                 'Spent: ${currencyInfo.symbol}${spent.toStringAsFixed(2)}',
                 style: Theme.of(context).textTheme.bodySmall?.copyWith(
-                      color: AppColors.textSecondary,
+                      color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                     ),
               ),
               Text(
                 'Limit: ${currencyInfo.symbol}${budget.toStringAsFixed(2)}',
                 style: Theme.of(context).textTheme.bodySmall?.copyWith(
-                      color: AppColors.textSecondary,
+                      color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                     ),
               ),
             ],
@@ -363,8 +361,11 @@ class _BalanceCard extends StatelessWidget {
       width: double.infinity,
       padding: const EdgeInsets.all(24),
       decoration: BoxDecoration(
-        gradient: const LinearGradient(
+        gradient: LinearGradient(
-          colors: [Color(0xFF7C6DED), Color(0xFF5A4FBF)],
+          colors: [
+            Theme.of(context).colorScheme.primary,
+            Theme.of(context).colorScheme.primary.withOpacity(0.7),
+          ],
           begin: Alignment.topLeft,
           end: Alignment.bottomRight,
         ),
@@ -383,14 +384,14 @@ class _BalanceCard extends StatelessWidget {
           Text(
             'Total Balance',
             style: Theme.of(context).textTheme.bodyMedium?.copyWith(
-                  color: Colors.white70,
+                  color: Theme.of(context).colorScheme.onPrimary.withOpacity(0.7),
                 ),
           ),
           const SizedBox(height: 8),
           Text(
             '${currencyInfo.symbol}${balance.toStringAsFixed(2)}',
             style: Theme.of(context).textTheme.headlineMedium?.copyWith(
-                  color: Colors.white,
+                  color: Theme.of(context).colorScheme.onPrimary,
                   fontWeight: FontWeight.w700,
                   letterSpacing: -0.5,
                 ),
@@ -399,7 +400,7 @@ class _BalanceCard extends StatelessWidget {
           Text(
             'Converted to ${currencyInfo.symbol}${currencyInfo.code}',
             style: Theme.of(context).textTheme.bodySmall?.copyWith(
-                  color: Colors.white60,
+                  color: Theme.of(context).colorScheme.onPrimary.withOpacity(0.6),
                   fontSize: 11,
                 ),
           ),
@@ -440,9 +441,9 @@ class _SummaryCard extends StatelessWidget {
     return Container(
       padding: const EdgeInsets.all(16),
       decoration: BoxDecoration(
-        color: AppColors.surface,
+        color: Theme.of(context).colorScheme.surface,
         borderRadius: BorderRadius.circular(16),
-        border: Border.all(color: AppColors.divider),
+        border: Border.all(color: Theme.of(context).dividerColor),
       ),
       child: Row(
         children: [
@@ -459,7 +460,7 @@ class _SummaryCard extends StatelessWidget {
             child: Column(
               crossAxisAlignment: CrossAxisAlignment.start,
               children: [
-                Text(label, style: Theme.of(context).textTheme.bodySmall?.copyWith(color: AppColors.textSecondary)),
+                Text(label, style: Theme.of(context).textTheme.bodySmall?.copyWith(color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6))),
                 const SizedBox(height: 2),
                 Text(
                   '${currencyInfo.symbol}${amount.toStringAsFixed(2)}',
@@ -478,57 +479,25 @@ class _SummaryCard extends StatelessWidget {
   }
 }
 
-class _TransactionTile extends ConsumerWidget {
+class _TransactionTile extends StatelessWidget {
   final Transaction transaction;
   const _TransactionTile({required this.transaction});
 
-  void _showUndoSnackBar(BuildContext context, WidgetRef ref, Transaction tx) {
-    ScaffoldMessenger.of(context).showSnackBar(
-      SnackBar(
-        content: const Text('Transaction deleted'),
-        duration: const Duration(seconds: 5),
-        action: SnackBarAction(
-          label: 'Undo',
-          onPressed: () {
-            ref.read(transactionsProvider.notifier).restore(tx);
-          },
-        ),
-        backgroundColor: AppColors.surface,
-      ),
-    );
-  }
-
   @override
-  Widget build(BuildContext context, WidgetRef ref) {
+  Widget build(BuildContext context) {
     final isIncome = transaction.type == TransactionType.income;
     final color = isIncome ? AppColors.income : AppColors.expense;
     final catColor = AppCategories.colors[transaction.category] ?? AppColors.accent;
     final catIcon = AppCategories.icons[transaction.category] ?? Icons.category_rounded;
 
-    return Dismissible(
+    return GestureDetector(
-      key: Key(transaction.id),
-      direction: DismissDirection.endToStart,
-      background: Container(
-        alignment: Alignment.centerRight,
-        padding: const EdgeInsets.only(right: 20),
-        decoration: BoxDecoration(
-          color: AppColors.expense.withOpacity(0.15),
-          borderRadius: BorderRadius.circular(16),
-        ),
-        child: const Icon(Icons.delete_outline_rounded, color: AppColors.expense),
-      ),
-      onDismissed: (_) {
-        ref.read(transactionsProvider.notifier).delete(transaction.id);
-        _showUndoSnackBar(context, ref, transaction);
-      },
-      child: GestureDetector(
       onTap: () => context.push('/add', extra: transaction),
       child: Container(
         padding: const EdgeInsets.all(14),
         decoration: BoxDecoration(
-            color: AppColors.surface,
+          color: Theme.of(context).colorScheme.surface,
           borderRadius: BorderRadius.circular(16),
-            border: Border.all(color: AppColors.divider),
+          border: Border.all(color: Theme.of(context).dividerColor),
         ),
         child: Row(
           children: [
@@ -549,14 +518,14 @@ class _TransactionTile extends ConsumerWidget {
                     transaction.category,
                     style: Theme.of(context).textTheme.bodyMedium?.copyWith(
                           fontWeight: FontWeight.w600,
-                            color: AppColors.textPrimary,
+                          color: Theme.of(context).colorScheme.onSurface,
                         ),
                   ),
                   if (transaction.note != null && transaction.note!.isNotEmpty)
                     Text(
                       transaction.note!,
                       style: Theme.of(context).textTheme.bodySmall?.copyWith(
-                              color: AppColors.textSecondary,
+                            color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                           ),
                       overflow: TextOverflow.ellipsis,
                     )
@@ -564,7 +533,7 @@ class _TransactionTile extends ConsumerWidget {
                     Text(
                       DateFormat('MMM d, yyyy').format(transaction.date),
                       style: Theme.of(context).textTheme.bodySmall?.copyWith(
-                              color: AppColors.textSecondary,
+                            color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                           ),
                     ),
                 ],
@@ -580,7 +549,6 @@ class _TransactionTile extends ConsumerWidget {
           ],
         ),
       ),
-      ),
     );
   }
 }
@@ -596,21 +564,21 @@ class _EmptyState extends StatelessWidget {
         children: [
           Container(
             padding: const EdgeInsets.all(24),
-            decoration: const BoxDecoration(
+            decoration: BoxDecoration(
-              color: AppColors.surface,
+              color: Theme.of(context).colorScheme.surface,
               shape: BoxShape.circle,
             ),
-            child: const Icon(
+            child: Icon(
               Icons.receipt_long_rounded,
               size: 48,
-              color: AppColors.textSecondary,
+              color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
             ),
           ),
           const SizedBox(height: 16),
           Text(
             'No transactions found',
             style: Theme.of(context).textTheme.titleMedium?.copyWith(
-                  color: AppColors.textPrimary,
+                  color: Theme.of(context).colorScheme.onSurface,
                   fontWeight: FontWeight.w600,
                 ),
           ),
@@ -618,7 +586,7 @@ class _EmptyState extends StatelessWidget {
           Text(
             'Tap + to add your first transaction',
             style: Theme.of(context).textTheme.bodyMedium?.copyWith(
-                  color: AppColors.textSecondary,
+                  color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                 ),
           ),
         ],

lib/features/settings/provider.dart

@@ -21,6 +21,12 @@ class BudgetNotifier extends StateNotifier<double?> {
     await _storage.saveBudget(budget);
     state = budget;
   }
+
+  void onCurrencyChanged(String oldCode, String newCode, ExchangeRateService rates) {
+    if (state == null) return;
+    final converted = rates.convert(state!, oldCode, newCode);
+    setBudget(converted);
+  }
 }
 
 // Currency info: symbol and code

lib/features/settings/screen.dart

@@ -59,7 +59,7 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
     _currencyFmt = NumberFormat.currency(symbol: currencyInfo.symbol, decimalDigits: 2);
 
     return Scaffold(
-      backgroundColor: AppColors.background,
+      backgroundColor: Theme.of(context).scaffoldBackgroundColor,
       appBar: AppBar(
         title: Column(
           crossAxisAlignment: CrossAxisAlignment.start,
@@ -68,13 +68,13 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
               'Settings',
               style: Theme.of(context).textTheme.titleLarge?.copyWith(
                     fontWeight: FontWeight.w700,
-                    color: AppColors.textPrimary,
+                    color: Theme.of(context).colorScheme.onSurface,
                   ),
             ),
             Text(
               'Manage your preferences',
               style: Theme.of(context).textTheme.bodySmall?.copyWith(
-                    color: AppColors.textSecondary,
+                    color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                   ),
             ),
           ],
@@ -98,9 +98,9 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
             Container(
               padding: const EdgeInsets.all(20),
               decoration: BoxDecoration(
-                color: AppColors.surface,
+                color: Theme.of(context).colorScheme.surface,
                 borderRadius: BorderRadius.circular(16),
-                border: Border.all(color: AppColors.divider),
+                border: Border.all(color: Theme.of(context).dividerColor),
               ),
               child: Row(
                 children: [
@@ -125,13 +125,13 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
                           'Dark Mode',
                           style: Theme.of(context).textTheme.titleMedium?.copyWith(
                                 fontWeight: FontWeight.w600,
-                                color: AppColors.textPrimary,
+                                color: Theme.of(context).colorScheme.onSurface,
                               ),
                         ),
                         Text(
                           isDarkMode ? 'Enabled' : 'Disabled',
                           style: Theme.of(context).textTheme.bodySmall?.copyWith(
-                                color: AppColors.textSecondary,
+                                color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                               ),
                         ),
                       ],
@@ -153,9 +153,9 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
             Container(
               padding: const EdgeInsets.all(20),
               decoration: BoxDecoration(
-                color: AppColors.surface,
+                color: Theme.of(context).colorScheme.surface,
                 borderRadius: BorderRadius.circular(16),
-                border: Border.all(color: AppColors.divider),
+                border: Border.all(color: Theme.of(context).dividerColor),
               ),
               child: Column(
                 crossAxisAlignment: CrossAxisAlignment.start,
@@ -180,7 +180,7 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
                           'Currency',
                           style: Theme.of(context).textTheme.titleMedium?.copyWith(
                                 fontWeight: FontWeight.w600,
-                                color: AppColors.textPrimary,
+                                color: Theme.of(context).colorScheme.onSurface,
                               ),
                         ),
                       ),
@@ -196,6 +196,9 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
                           padding: const EdgeInsets.only(right: 8),
                           child: GestureDetector(
                             onTap: () {
+                              final oldCode = ref.read(currencyProvider).code;
+                              final rates = ref.read(exchangeRateServiceProvider);
+                              ref.read(budgetProvider.notifier).onCurrencyChanged(oldCode, code, rates);
                               ref.read(currencyProvider.notifier).setCurrency(code);
                             },
                             child: Container(
@@ -203,10 +206,10 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
                               decoration: BoxDecoration(
                                 color: isSelected
                                     ? AppColors.accent.withOpacity(0.2)
-                                    : AppColors.background,
+                                    : Theme.of(context).scaffoldBackgroundColor,
                                 borderRadius: BorderRadius.circular(12),
                                 border: Border.all(
-                                  color: isSelected ? AppColors.accent : AppColors.divider,
+                                  color: isSelected ? AppColors.accent : Theme.of(context).dividerColor,
                                   width: isSelected ? 1.5 : 1,
                                 ),
                               ),
@@ -215,7 +218,7 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
                                   Text(
                                     info.symbol,
                                     style: Theme.of(context).textTheme.titleLarge?.copyWith(
-                                          color: isSelected ? AppColors.accent : AppColors.textSecondary,
+                                          color: isSelected ? AppColors.accent : Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                                           fontWeight: isSelected ? FontWeight.w700 : FontWeight.normal,
                                         ),
                                   ),
@@ -223,7 +226,7 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
                                   Text(
                                     code,
                                     style: Theme.of(context).textTheme.bodySmall?.copyWith(
-                                          color: isSelected ? AppColors.accent : AppColors.textSecondary,
+                                          color: isSelected ? AppColors.accent : Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                                           fontWeight: isSelected ? FontWeight.w600 : FontWeight.normal,
                                         ),
                                   ),
@@ -244,9 +247,9 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
             Container(
               padding: const EdgeInsets.all(20),
               decoration: BoxDecoration(
-                color: AppColors.surface,
+                color: Theme.of(context).colorScheme.surface,
                 borderRadius: BorderRadius.circular(16),
-                border: Border.all(color: AppColors.divider),
+                border: Border.all(color: Theme.of(context).dividerColor),
               ),
               child: Column(
                 crossAxisAlignment: CrossAxisAlignment.start,
@@ -271,14 +274,14 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
                           'Monthly Budget',
                           style: Theme.of(context).textTheme.titleMedium?.copyWith(
                                 fontWeight: FontWeight.w600,
-                                color: AppColors.textPrimary,
+                                color: Theme.of(context).colorScheme.onSurface,
                               ),
                         ),
                       ),
                       if (!_isEditing)
                         IconButton(
                           icon: const Icon(Icons.edit_rounded, size: 20),
-                          color: AppColors.textSecondary,
+                          color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                           onPressed: () => setState(() => _isEditing = true),
                         ),
                     ],
@@ -334,7 +337,7 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
                               ? _currencyFmt.format(budget)
                               : 'Not set',
                           style: Theme.of(context).textTheme.headlineSmall?.copyWith(
-                                color: budget != null ? AppColors.accent : AppColors.textSecondary,
+                                color: budget != null ? AppColors.accent : Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                                 fontWeight: FontWeight.w700,
                               ),
                         ),
@@ -344,7 +347,7 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
                               ? 'Your monthly spending limit'
                               : 'Set a monthly spending limit to track your budget',
                           style: Theme.of(context).textTheme.bodySmall?.copyWith(
-                                color: AppColors.textSecondary,
+                                color: Theme.of(context).colorScheme.onSurface.withOpacity(0.6),
                               ),
                         ),
                       ],
@@ -368,7 +371,7 @@ class _SettingsScreenState extends ConsumerState<SettingsScreen> {
                     child: Text(
                       'Budget tracking shows on the Dashboard with a progress bar and warning when exceeded.',
                       style: Theme.of(context).textTheme.bodySmall?.copyWith(
-                            color: AppColors.textPrimary,
+                            color: Theme.of(context).colorScheme.onSurface,
                           ),
                     ),
                   ),