feat: 接入旧站管理端并完整迁移后台能力

backend/internal/modules/order/handler_error.go

@@ -22,6 +22,8 @@ func writeOrderError(c *gin.Context, err error) {
 		response.Error(c, http.StatusConflict, "listing_unavailable", "该账号暂不可租")
 	case errors.Is(err, ErrCannotRentOwnListing):
 		response.BadRequest(c, "不能租用自己发布的账号")
+	case errors.Is(err, ErrPremiumLevelRequired):
+		response.Error(c, http.StatusForbidden, "platinum_level_required", "成长等级达到铂金及以上才能租用极品专区账号")
 	case errors.Is(err, ErrInsufficientBalance):
 		response.Error(c, http.StatusConflict, "insufficient_balance", "钱包余额不足，请先充值")
 	case errors.Is(err, ErrChannelPaymentRequired):