新增设备类型选项接口

internal/store/postgres/device_store.go

@@ -142,6 +142,23 @@ func (s *DeviceStore) List(ctx context.Context, opts *store.QueryOptions, filter
 	return devices, total, nil
 }
 
+// ListDeviceTypes 查询未删除设备的去重设备类型。
+func (s *DeviceStore) ListDeviceTypes(ctx context.Context) ([]string, error) {
+	types := make([]string, 0)
+	trimmedType := "TRIM(device_type)"
+	err := s.db.WithContext(ctx).
+		Model(&model.Device{}).
+		Where("NULLIF("+trimmedType+", '') IS NOT NULL").
+		Select(trimmedType).
+		Distinct().
+		Order(trimmedType+" ASC").
+		Pluck(trimmedType, &types).Error
+	if err != nil {
+		return nil, err
+	}
+	return types, nil
+}
+
 func (s *DeviceStore) applyDeviceFilters(ctx context.Context, query *gorm.DB, filters map[string]any) *gorm.DB {
 	if virtualNo, ok := filters["virtual_no"].(string); ok && virtualNo != "" {
 		query = query.Where("virtual_no LIKE ?", "%"+virtualNo+"%")