优化

flutter_monisuo/lib/ui/pages/home/bills_page.dart

@@ -8,6 +8,7 @@ import '../../../core/theme/app_spacing.dart';
 import '../../../data/models/account_models.dart';
 import '../../../data/services/bonus_service.dart';
 import '../../../providers/asset_provider.dart';
+import '../../components/coin_icon.dart';
 
 /// 賬單頁面 — 代幣盈虧賬單 + 新人福利賬單 + 推廣福利賬單
 class BillsPage extends StatefulWidget {
@@ -302,17 +303,7 @@ class _BillsPageState extends State<BillsPage> with SingleTickerProviderStateMix
             children: [
               Row(
                 children: [
-                  CircleAvatar(
-                    radius: 16,
-                    backgroundColor: colorScheme.primary.withValues(alpha: 0.1),
-                    child: Text(
-                      h.coinCode.substring(0, 1),
-                      style: AppTextStyles.labelLarge(context).copyWith(
-                        color: colorScheme.primary,
-                        fontWeight: FontWeight.bold,
-                      ),
-                    ),
-                  ),
+                  CoinIcon(symbol: h.coinCode, size: 32),
                   const SizedBox(width: AppSpacing.sm),
                   Text(h.coinCode, style: AppTextStyles.headlineMedium(context).copyWith(
                     fontWeight: FontWeight.bold,