refactor(ui): 移除快捷操作栏盈亏按钮，今日盈亏/总盈亏卡片已有点击跳转

flutter_monisuo/lib/ui/pages/trade/components/coin_selector.dart

@@ -72,7 +72,7 @@ class CoinSelector extends StatelessWidget {
   void _showCoinPicker(BuildContext context) {
     showModalBottomSheet(
       context: context,
-      backgroundColor: const Color(0x00000000),
+      backgroundColor: Colors.transparent,
       isScrollControlled: true,
       builder: (ctx) => Container(
         height: MediaQuery.of(ctx).size.height * 0.65,
@@ -143,7 +143,7 @@ class CoinSelector extends StatelessWidget {
         padding: EdgeInsets.symmetric(
             horizontal: AppSpacing.lg, vertical: AppSpacing.md),
         color:
-            isSelected ? context.colors.primary.withValues(alpha: 0.1) : const Color(0x00000000),
+            isSelected ? context.colors.primary.withValues(alpha: 0.1) : Colors.transparent,
         child: Row(
           children: [
             CoinAvatar(icon: coin.displayIcon),

flutter_monisuo/lib/ui/pages/trade/components/confirm_dialog.dart

@@ -32,7 +32,7 @@ class ConfirmDialog extends StatelessWidget {
         : context.appColors.down;
 
     return Dialog(
-      backgroundColor: const Color(0x00000000),
+      backgroundColor: Colors.transparent,
       child: GlassPanel(
         borderRadius: BorderRadius.circular(AppRadius.lg),
         padding: EdgeInsets.all(AppSpacing.lg),