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/e2e/rental_flow_test.go

@@ -216,7 +216,7 @@ func newFlowServices(db *gorm.DB) flowServices {
 			return refund.Status, nil
 		}),
 	})
-	paymentRepo = payment.NewRepository(db, configRepo, orderRepo, walletRepo)
+	paymentRepo = payment.NewRepository(db, configRepo, orderRepo)
 	disputeRepo := dispute.NewRepository(db, dispute.Dependencies{
 		RefundStarter: dispute.RefundStarterFunc(func(ctx context.Context, orderID uint64, refundAmountCent int64, bizType string, remark string) (string, error) {
 			refund, err := paymentRepo.StartRefund(ctx, orderID, refundAmountCent, bizType, remark)
@@ -230,7 +230,7 @@ func newFlowServices(db *gorm.DB) flowServices {
 	return flowServices{
 		listing:        listing.NewService(listingRepo, fixedConfig{"listing.review_required": "true"}),
 		order:          order.NewService(orderRepo),
-		payment:        payment.NewService(paymentRepo, "development"),
+		payment:        payment.NewService(paymentRepo),
 		paymentConfig:  paymentconfig.NewService(configRepo),
 		paymentAccount: paymentaccount.NewService(paymentaccount.NewRepository(db)),
 		dispute:        dispute.NewService(disputeRepo),