优化账户余额调整功能：新增调整余额的逻辑，更新相关页面以显示账户余额和可用额度，调整路由配置以移除不必要的动画效果。

pkg/models/transaction.go

@@ -544,7 +544,9 @@ func (t *Transaction) ToTransactionInfoResponse(tagIds []int64, editable bool) *
 	destinationAccountId := int64(0)
 	destinationAmount := int64(0)
 
-	if t.Type == TRANSACTION_DB_TYPE_TRANSFER_OUT {
+	if t.Type == TRANSACTION_DB_TYPE_MODIFY_BALANCE {
+		sourceAmount = t.RelatedAccountAmount // always return delta
+	} else if t.Type == TRANSACTION_DB_TYPE_TRANSFER_OUT {
 		destinationAccountId = t.RelatedAccountId
 		destinationAmount = t.RelatedAccountAmount
 	} else if t.Type == TRANSACTION_DB_TYPE_TRANSFER_IN {

pkg/services/transactions.go

@@ -954,7 +954,7 @@ func (s *TransactionService) ModifyTransaction(c core.Context, transaction *mode
 
 		if transaction.Amount != oldTransaction.Amount {
 			if oldTransaction.Type == models.TRANSACTION_DB_TYPE_MODIFY_BALANCE {
-				transaction.RelatedAccountAmount = oldTransaction.RelatedAccountAmount + transaction.Amount - oldTransaction.Amount
+				transaction.RelatedAccountAmount = transaction.Amount // Amount IS the new delta
 				updateCols = append(updateCols, "related_account_amount")
 			}
 
@@ -2251,17 +2251,8 @@ func (s *TransactionService) doCreateTransaction(c core.Context, database *datas
 
 	// Verify balance modification transaction and calculate real amount
 	if transaction.Type == models.TRANSACTION_DB_TYPE_MODIFY_BALANCE {
-		otherTransactionExists, err := sess.Cols("uid", "deleted", "account_id").Where("uid=? AND deleted=? AND account_id=?", transaction.Uid, false, sourceAccount.AccountId).Limit(1).Exist(&models.Transaction{})
-
-		if err != nil {
-			log.Errorf(c, "[transactions.doCreateTransaction] failed to get whether other transactions exist, because %s", err.Error())
-			return err
-		} else if otherTransactionExists {
-			return errs.ErrBalanceModificationTransactionCannotAddWhenNotEmpty
-		}
-
 		transaction.RelatedAccountId = transaction.AccountId
-		transaction.RelatedAccountAmount = transaction.Amount - sourceAccount.Balance
+		transaction.RelatedAccountAmount = transaction.Amount // Amount IS the delta
 	} else { // Not allow to add transaction before balance modification transaction
 		otherTransactionExists := false