feat(web): 构建Flutter Web应用并添加资金管理功能

- 生成Flutter Web构建产物，包括主应用文件、资源文件和CanvasKit支持
- 添加资金订单管理功能，支持资金充值和提现操作
- 更新管理后台界面，优化仪表板和订单页面显示
- 扩展后端API接口，增加资金相关服务和控制器
- 添加数据库索引优化查询性能

flutter_monisuo/lib/ui/pages/orders/fund_order_card.dart

@@ -69,7 +69,7 @@ class _FundOrderCard extends StatelessWidget {
         case 1:
           return '待审批';
         case 2:
-          return '已完成';
+          return '已出款';
         case 3:
           return '已驳回';
         case 4:

flutter_monisuo/lib/ui/pages/orders/fund_orders_page.dart

@@ -214,6 +214,10 @@ class _FundOrdersPageState extends State<FundOrdersPage> {
             const SizedBox(height: AppSpacing.sm),
             _buildRejectionReason(order),
           ],
+          if (order.withdrawContact != null) ...[
+            const SizedBox(height: AppSpacing.sm - AppSpacing.xs),
+            _buildDetailRow('联系方式', order.withdrawContact!, c),
+          ],
           if (order.receivableAmount != null && !order.isDeposit) ...[
             const SizedBox(height: AppSpacing.sm),
             _buildPayableRow(order),
@@ -222,26 +226,42 @@ class _FundOrdersPageState extends State<FundOrdersPage> {
             const SizedBox(height: AppSpacing.sm + AppSpacing.xs),
             _buildActions(order),
           ],
+          const SizedBox(height: AppSpacing.sm),
+          Row(
+            mainAxisAlignment: MainAxisAlignment.spaceBetween,
+            children: [
+              Text(
+                '创建: ${_formatTime(order.createTime)}',
+                style: AppTextStyles.bodySmall(context).copyWith(color: c.mutedText),
+              ),
+              if (order.rejectReason != null)
+                Expanded(
+                  child: Text(
+                    '驳回: ${order.rejectReason}',
+                    style: AppTextStyles.bodySmall(context).copyWith(color: AppColorScheme.getDownColor(_isDark)),
+                    textAlign: TextAlign.right,
+                    overflow: TextOverflow.ellipsis,
+                  ),
+                ),
+            ],
+          ),
         ],
       ),
     );
   }
 
   // ---------------------------------------------------------------------------
-  // Card Header - type badge + status badge
+  // Card Header (order type + status badge)
   // ---------------------------------------------------------------------------
   Widget _buildCardHeader(OrderFund order) {
-    final upColor = AppColorScheme.getUpColor(_isDark);
-    final downColor = AppColorScheme.getDownColor(_isDark);
-    final upBg = AppColorScheme.getUpBackgroundColor(_isDark, opacity: 0.12);
-    final downBg = AppColorScheme.getDownBackgroundColor(_isDark, opacity: 0.12);
-    final typeColor = order.isDeposit ? upColor : downColor;
-    final typeBg = order.isDeposit ? upBg : downBg;
-
+    final c = _colors;
     return Row(
       mainAxisAlignment: MainAxisAlignment.spaceBetween,
       children: [
-        _buildBadge(order.typeText, typeColor, typeBg),
+        Text(
+          order.isDeposit ? '充值' : '提现',
+          style: AppTextStyles.headlineMedium(context).copyWith(color: c.primaryText),
+        ),
         _buildStatusBadge(order),
       ],
     );