refactor(money): 统一金额分为纯整数工具

backend/internal/modules/wallet/repository.go

@@ -10,7 +10,6 @@ import (
 
 	"hfb_sys/backend/internal/model"
 	"hfb_sys/backend/internal/timeutil"
-	"hfb_sys/backend/pkg/money"
 
 	"gorm.io/gorm"
 	"gorm.io/gorm/clause"
@@ -264,10 +263,6 @@ func applyEntry(account *model.WalletAccount, entry Entry) (int64, error) {
 	}
 }
 
-func roundWalletMoney(yuan float64) float64 {
-	return money.Round(yuan)
-}
-
 func toAccountDTO(account model.WalletAccount) *AccountDTO {
 	return &AccountDTO{
 		UserID:               account.UserID,

backend/internal/modules/wallet/repository_test.go

@@ -53,10 +53,6 @@ func TestApplyEntryKeepsWalletMoneyAtJiaoPrecision(t *testing.T) {
 	if account.AvailableBalanceCent != 230 {
 		t.Fatalf("AvailableBalanceCent = %d, want 230", account.AvailableBalanceCent)
 	}
-
-	if rounded := roundWalletMoney(2.36); rounded != 2.4 {
-		t.Fatalf("roundWalletMoney(2.36) = %v, want 2.4", rounded)
-	}
 }
 
 func TestNewLedgerNoUsesReadableFormat(t *testing.T) {