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/wallet/repository.go

@@ -64,59 +64,6 @@ func (r *Repository) Ledger(ctx context.Context, userID uint64, page, pageSize i
 	return &PaginatedResult{Items: items, Total: total, Page: page, PageSize: pageSize}, nil
 }
 
-func (r *Repository) Recharge(ctx context.Context, userID uint64, amountCent int64) (*AccountDTO, error) {
-	err := r.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
-		return AppendEntries(tx, Entry{
-			UserID:      userID,
-			Direction:   "in",
-			AmountCent:  amountCent,
-			BalanceType: "available",
-			BizType:     "dev_recharge",
-			BizNo:       "DEV",
-			Remark:      "开发环境充值",
-		})
-	})
-	if err != nil {
-		return nil, err
-	}
-	return r.Account(ctx, userID)
-}
-
-func (r *Repository) ConfirmRechargeFromChannel(ctx context.Context, userID uint64, bizNo string, amountCent int64) error {
-	if userID == 0 || amountCent <= 0 || bizNo == "" {
-		return ErrInvalidAmount
-	}
-	return r.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
-		if err := ensureAccount(tx, userID); err != nil {
-			return err
-		}
-		var account model.WalletAccount
-		if err := tx.Clauses(clause.Locking{Strength: "UPDATE"}).
-			Where("user_id = ?", userID).
-			First(&account).Error; err != nil {
-			return err
-		}
-		var existing int64
-		if err := tx.Model(&model.WalletLedger{}).
-			Where("user_id = ? AND biz_type = ? AND biz_no = ?", userID, "channel_recharge", bizNo).
-			Count(&existing).Error; err != nil {
-			return err
-		}
-		if existing > 0 {
-			return nil
-		}
-		return AppendEntries(tx, Entry{
-			UserID:      userID,
-			Direction:   "in",
-			AmountCent:  amountCent,
-			BalanceType: "available",
-			BizType:     "channel_recharge",
-			BizNo:       bizNo,
-			Remark:      "渠道充值入账",
-		})
-	})
-}
-
 // Withdraw 保留仓库能力；当前公开提现入口在 service 层标记为待开发，不会调用到这里。
 func (r *Repository) Withdraw(ctx context.Context, userID uint64, amountCent int64) (*AccountDTO, error) {
 	if userID == 0 || amountCent <= 0 {