update theme

lib/features/loyalty/presentation/widgets/reward_card.dart

@@ -8,7 +8,6 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';
 import 'package:intl/intl.dart';
-import 'package:worker/core/theme/colors.dart';
 import 'package:worker/features/loyalty/domain/entities/gift_catalog.dart';
 import 'package:worker/features/loyalty/presentation/providers/loyalty_points_provider.dart';
 
@@ -27,6 +26,7 @@ class RewardCard extends ConsumerWidget {
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
+    final colorScheme = Theme.of(context).colorScheme;
     final hasEnoughPoints = ref.watch(hasEnoughPointsProvider(gift.pointsCost));
     final numberFormat = NumberFormat('#,###', 'vi_VN');
 
@@ -39,7 +39,7 @@ class RewardCard extends ConsumerWidget {
         crossAxisAlignment: CrossAxisAlignment.stretch,
         children: [
           // Gift Image
-          _buildImage(),
+          _buildImage(colorScheme),
 
           // Gift Info
           Expanded(
@@ -51,10 +51,10 @@ class RewardCard extends ConsumerWidget {
                   // Gift Name
                   Text(
                     gift.name,
-                    style: const TextStyle(
+                    style: TextStyle(
                       fontSize: 14,
                       fontWeight: FontWeight.w600,
-                      color: AppColors.grey900,
+                      color: colorScheme.onSurface,
                       height: 1.3,
                     ),
                     maxLines: 2,
@@ -66,9 +66,9 @@ class RewardCard extends ConsumerWidget {
                   if (gift.description != null && gift.description!.isNotEmpty)
                     Text(
                       gift.description!,
-                      style: const TextStyle(
+                      style: TextStyle(
                         fontSize: 12,
-                        color: AppColors.grey500,
+                        color: colorScheme.onSurfaceVariant,
                         height: 1.2,
                       ),
                       maxLines: 1,
@@ -81,10 +81,10 @@ class RewardCard extends ConsumerWidget {
                   // Points Cost (at bottom)
                   Text(
                     '${numberFormat.format(gift.pointsCost)} điểm',
-                    style: const TextStyle(
+                    style: TextStyle(
                       fontSize: 14,
                       fontWeight: FontWeight.w700,
-                      color: AppColors.primaryBlue,
+                      color: colorScheme.primary,
                     ),
                   ),
                   const SizedBox(height: 8),
@@ -101,8 +101,8 @@ class RewardCard extends ConsumerWidget {
                         FontAwesomeIcons.gift,
                         size: 14,
                         color: hasEnoughPoints && gift.isAvailable
-                            ? Colors.white
-                            : AppColors.grey500,
+                            ? colorScheme.onPrimary
+                            : colorScheme.onSurfaceVariant,
                       ),
                       label: Text(
                         hasEnoughPoints && gift.isAvailable
@@ -115,11 +115,11 @@ class RewardCard extends ConsumerWidget {
                       ),
                       style: ElevatedButton.styleFrom(
                         backgroundColor: hasEnoughPoints && gift.isAvailable
-                            ? AppColors.primaryBlue
-                            : AppColors.grey100,
+                            ? colorScheme.primary
+                            : colorScheme.surfaceContainerHighest,
                         foregroundColor: hasEnoughPoints && gift.isAvailable
-                            ? Colors.white
-                            : AppColors.grey500,
+                            ? colorScheme.onPrimary
+                            : colorScheme.onSurfaceVariant,
                         elevation: 0,
                         shape: RoundedRectangleBorder(
                           borderRadius: BorderRadius.circular(8),
@@ -141,7 +141,7 @@ class RewardCard extends ConsumerWidget {
   }
 
   /// Build gift image
-  Widget _buildImage() {
+  Widget _buildImage(ColorScheme colorScheme) {
     return SizedBox(
       height: 120,
       child: gift.imageUrl != null && gift.imageUrl!.isNotEmpty
@@ -149,26 +149,26 @@ class RewardCard extends ConsumerWidget {
               imageUrl: gift.imageUrl!,
               fit: BoxFit.cover,
               placeholder: (context, url) => Container(
-                color: AppColors.grey100,
+                color: colorScheme.surfaceContainerHighest,
                 child: const Center(
                   child: CircularProgressIndicator(strokeWidth: 2),
                 ),
               ),
               errorWidget: (context, url, error) => Container(
-                color: AppColors.grey100,
-                child: const FaIcon(
+                color: colorScheme.surfaceContainerHighest,
+                child: FaIcon(
                   FontAwesomeIcons.gift,
                   size: 48,
-                  color: AppColors.grey500,
+                  color: colorScheme.onSurfaceVariant,
                 ),
               ),
             )
           : Container(
-              color: AppColors.grey100,
-              child: const FaIcon(
+              color: colorScheme.surfaceContainerHighest,
+              child: FaIcon(
                 FontAwesomeIcons.gift,
                 size: 48,
-                color: AppColors.grey500,
+                color: colorScheme.onSurfaceVariant,
               ),
             ),
     );