删除钱包充值功能并消除重复入账风险

钱包充值为开发态测试功能(生产环境本就禁用),且支付回调存在重复入账风险:入账与标记 paid 两步非原子、wallet_ledger 去重无唯一索引、幂等键使用了可变的 ProviderOrderID。直接删除该功能从根本上消除风险。

后端:
- payment 移除 StartWalletRecharge/QueryWalletRecharge 及相关 handler/DTO/常量;confirmPaid 增加 OrderID 守卫;解除对 wallet 仓库的依赖
- wallet 移除 Recharge/ConfirmRechargeFromChannel 及相关定义
- 移除三条充值路由;adminfinance 财务统计口径只统计 order_pay
- 清理充值相关测试用例

前端:
- 移除充值 API、WalletView 充值面板/弹窗、admin 充值标签与筛选
- 保留钱包余额、流水、提现等核心能力

go build/vet 与 vue-tsc typecheck 均通过。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/internal/modules/payment/channel_status.go

@@ -34,21 +34,12 @@ func (r *Repository) updateChannelStatus(ctx context.Context, paymentID uint64,
 	return r.db.WithContext(ctx).Model(&model.PaymentOrder{}).Where("id = ?", paymentID).Updates(updates).Error
 }
 func (r *Repository) confirmPaid(ctx context.Context, payment *model.PaymentOrder, status string, paidAt time.Time, raw map[string]string, source string) error {
-	if payment.Status != "paid" {
-		if payment.OrderID == 0 {
-			if r.walletRepo == nil {
-				return ErrDependencyUnavailable
-			}
-			if err := r.walletRepo.ConfirmRechargeFromChannel(ctx, payment.UserID, firstNonEmpty(payment.ProviderOrderID, payment.PaymentNo), payment.AmountCent); err != nil {
-				return err
-			}
-		} else {
-			if r.orderRepo == nil {
-				return ErrDependencyUnavailable
-			}
-			if err := r.orderRepo.ConfirmPaidFromChannel(ctx, payment.OrderID, firstNonEmpty(payment.ProviderOrderID, payment.PaymentNo)); err != nil {
-				return err
-			}
+	if payment.Status != "paid" && payment.OrderID != 0 {
+		if r.orderRepo == nil {
+			return ErrDependencyUnavailable
+		}
+		if err := r.orderRepo.ConfirmPaidFromChannel(ctx, payment.OrderID, firstNonEmpty(payment.ProviderOrderID, payment.PaymentNo)); err != nil {
+			return err
 		}
 	}
 	updates := map[string]any{