feat: update aftersales service types and serial format

models/models.go

@@ -272,7 +272,7 @@ type CreateAftersalesOrderDTO struct {
 	CompanyAddress   string `json:"companyAddress" validate:"required"`
 	ContactName      string `json:"contactName" validate:"required"`
 	ContactPhone     string `json:"contactPhone" validate:"required,len=11"`
-	ServiceType      string `json:"serviceType" validate:"required,oneof=software hardware other"`
+	ServiceType      string `json:"serviceType" validate:"required,oneof=software hardware maintenance"`
 	IssueDescription string `json:"issueDescription" validate:"required"`
 	TechnicianID     *uint  `json:"technicianId,omitempty"`
 }
@@ -282,7 +282,7 @@ type UpdateAftersalesOrderDTO struct {
 	CompanyAddress   string `json:"companyAddress,omitempty"`
 	ContactName      string `json:"contactName,omitempty"`
 	ContactPhone     string `json:"contactPhone,omitempty" validate:"omitempty,len=11"`
-	ServiceType      string `json:"serviceType,omitempty" validate:"omitempty,oneof=software hardware other"`
+	ServiceType      string `json:"serviceType,omitempty" validate:"omitempty,oneof=software hardware maintenance"`
 	IssueDescription string `json:"issueDescription,omitempty"`
 	ResolutionNote   string `json:"resolutionNote,omitempty"`
 	TechnicianID     *uint  `json:"technicianId,omitempty"`

services/aftersales_service.go

@@ -108,26 +108,27 @@ func normalizeAftersalesSerial(sn string) string {
 }
 
 // generateUniqueSerial 生成唯一的售后工单序列号
-// 格式：zjbf-sh-YYMMNN，YY=年份后两位，MM=月份，NN=当月第几单（至少 2 位，溢出自然加宽）
+// 格式：zjbf-sh-YYMMDDNN，YY=年份后两位，MM=月份，DD=日期，NN=当天第几单（至少 2 位，溢出自然加宽）
 func (s *AftersalesService) generateUniqueSerial() (string, error) {
 	now := time.Now()
 	yy := now.Year() % 100
 	mm := int(now.Month())
+	dd := now.Day()
 
-	monthStart := time.Date(now.Year(), now.Month(), 1, 0, 0, 0, 0, now.Location())
+	dayStart := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, now.Location())
-	nextMonth := monthStart.AddDate(0, 1, 0)
+	nextDay := dayStart.AddDate(0, 0, 1)
 
-	// 统计本月已创建工单数（含软删除，避免编号回收）
+	// 统计当天已创建工单数（含软删除，避免编号回收）
 	var count int64
 	if err := database.DB.Unscoped().Model(&models.AftersalesOrder{}).
-		Where("created_at >= ? AND created_at < ?", monthStart, nextMonth).
+		Where("created_at >= ? AND created_at < ?", dayStart, nextDay).
 		Count(&count).Error; err != nil {
-		return "", fmt.Errorf("统计当月工单数失败: %w", err)
+		return "", fmt.Errorf("统计当日工单数失败: %w", err)
 	}
 
 	seq := int(count) + 1
 	for attempt := 0; attempt < 100; attempt++ {
-		candidate := fmt.Sprintf("%s%02d%02d%02d", aftersalesSerialPrefix, yy, mm, seq)
+		candidate := fmt.Sprintf("%s%02d%02d%02d%02d", aftersalesSerialPrefix, yy, mm, dd, seq)
 
 		var existing models.AftersalesOrder
 		result := database.DB.Unscoped().Where("serial_number = ?", candidate).First(&existing)

services/aftersales_service_test.go

@@ -55,7 +55,7 @@ func createOrderFor(t *testing.T, user models.User, phone string) *models.Afters
 	return order
 }
 
-func TestAftersalesService_Create_GeneratesYYMMNNSerial(t *testing.T) {
+func TestAftersalesService_Create_GeneratesYYMMDDNNSerial(t *testing.T) {
 	user := seedTechnician(t, "aftersales_create_tech")
 	defer database.DB.Unscoped().Delete(&user)
 
@@ -72,7 +72,7 @@ func TestAftersalesService_Create_GeneratesYYMMNNSerial(t *testing.T) {
 	assert.NoError(t, err)
 	assert.NotNil(t, order)
 	assert.True(t, strings.HasPrefix(order.SerialNumber, "zjbf-sh-"))
-	assert.Len(t, order.SerialNumber, len("zjbf-sh-")+6, "default serial should be 6 digits (YYMMNN)")
+	assert.Len(t, order.SerialNumber, len("zjbf-sh-")+8, "default serial should be 8 digits (YYMMDDNN)")
 	assert.Equal(t, WorkOrderStatusCreated, order.WorkOrderStatus)
 	assert.Equal(t, AuthorizationStatusPending, order.AuthorizationStatus)
 	assert.NotNil(t, order.TechnicianID)
@@ -82,25 +82,25 @@ func TestAftersalesService_Create_GeneratesYYMMNNSerial(t *testing.T) {
 	database.DB.Unscoped().Where("company_name = ?", "AftersalesSerialCo").Delete(&models.Company{})
 }
 
-func TestAftersalesService_Create_SerialIncrementsWithinMonth(t *testing.T) {
+func TestAftersalesService_Create_SerialIncrementsWithinDay(t *testing.T) {
 	user := seedTechnician(t, "aftersales_seq_tech")
 	defer database.DB.Unscoped().Delete(&user)
 
 	svc := AftersalesService{}
 	first, err := svc.Create(models.CreateAftersalesOrderDTO{
 		CompanyName: "SeqCo", CompanyAddress: "addr", ContactName: "A", ContactPhone: "13800002000",
-		ServiceType: "other", IssueDescription: "issue 1",
+		ServiceType: "maintenance", IssueDescription: "issue 1",
 	}, user.ID)
 	assert.NoError(t, err)
 
 	second, err := svc.Create(models.CreateAftersalesOrderDTO{
 		CompanyName: "SeqCo", CompanyAddress: "addr", ContactName: "A", ContactPhone: "13800002000",
-		ServiceType: "other", IssueDescription: "issue 2",
+		ServiceType: "maintenance", IssueDescription: "issue 2",
 	}, user.ID)
 	assert.NoError(t, err)
 
 	assert.NotEqual(t, first.SerialNumber, second.SerialNumber)
-	// 第二单的序号应大于第一单（按月递增）
+	// 第二单的序号应大于第一单（按天递增）
 	assert.True(t, second.SerialNumber > first.SerialNumber)
 
 	database.DB.Unscoped().Delete(first)