修复拉卡拉支付时间偏差

backend/internal/modules/order/repository.go

@@ -14,6 +14,7 @@ import (
 	"hfb_sys/backend/internal/modules/chat"
 	"hfb_sys/backend/internal/modules/notification"
 	"hfb_sys/backend/internal/modules/wallet"
+	"hfb_sys/backend/internal/timeutil"
 	"hfb_sys/backend/pkg/money"
 
 	"gorm.io/datatypes"
@@ -1627,7 +1628,7 @@ func makeAccountSnapshot(account model.GameAccount) (datatypes.JSON, error) {
 func newOrderNo() (string, error) {
 	// 生成格式：RO + YYYYMMDDHHMMSS + 3位随机数
 	// 例如：RO20260603123456789
-	now := time.Now()
+	now := timeutil.ShanghaiNow()
 
 	// 时间部分：年月日时分秒 (14位)
 	timeStr := now.Format("20060102150405")

backend/internal/modules/order/repository_test.go

@@ -5,6 +5,7 @@ import (
 	"time"
 
 	"hfb_sys/backend/internal/model"
+	"hfb_sys/backend/internal/timeutil"
 
 	"gorm.io/datatypes"
 )
@@ -131,3 +132,29 @@ func TestArchiveListingAfterCheckoutMovesListingOffline(t *testing.T) {
 	// - Order should enter completed or closed state
 	_ = time.Now()
 }
+
+func TestNewOrderNoUsesShanghaiTimeWhenLocalIsUTC(t *testing.T) {
+	oldLocal := time.Local
+	time.Local = time.UTC
+	defer func() {
+		time.Local = oldLocal
+	}()
+
+	loc := timeutil.ShanghaiLocation()
+	before := time.Now().In(loc)
+	orderNo, err := newOrderNo()
+	after := time.Now().In(loc)
+	if err != nil {
+		t.Fatalf("newOrderNo() error = %v", err)
+	}
+	if len(orderNo) != len("RO20260603123456789") {
+		t.Fatalf("orderNo length = %d, want %d: %s", len(orderNo), len("RO20260603123456789"), orderNo)
+	}
+	parsed, err := time.ParseInLocation("20060102150405", orderNo[2:16], loc)
+	if err != nil {
+		t.Fatalf("parse order no time: %v", err)
+	}
+	if parsed.Before(before.Add(-2*time.Second)) || parsed.After(after.Add(2*time.Second)) {
+		t.Fatalf("order no time = %s, want between %s and %s", parsed, before, after)
+	}
+}