feat(设备列表): 新增 has_active_package 查询条件

- DTO ListDeviceRequest 增加 HasActivePackage *bool 字段（query/json: has_active_package）
- Service List 方法将 HasActivePackage 透传至 filters["has_active_package"]
- Store applyDeviceFilters 新增 applyHasActivePackageFilter：
  true  → EXISTS 子查询（生效中主套餐）
  false → NOT EXISTS 子查询
  均限制 master_usage_id IS NULL、deleted_at IS NULL，状态使用 constants.PackageUsageStatusActive

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

internal/model/dto/device_dto.go

@@ -15,8 +15,9 @@ type ListDeviceRequest struct {
 	BatchNo          string     `json:"batch_no" query:"batch_no" validate:"omitempty,max=100" maxLength:"100" description:"批次号"`
 	DeviceType       string     `json:"device_type" query:"device_type" validate:"omitempty,max=50" maxLength:"50" description:"设备类型"`
 	Manufacturer     string     `json:"manufacturer" query:"manufacturer" validate:"omitempty,max=255" maxLength:"255" description:"制造商(模糊查询)"`
-	CreatedAtStart   *time.Time `json:"created_at_start" query:"created_at_start" description:"创建时间起始"`
-	CreatedAtEnd     *time.Time `json:"created_at_end" query:"created_at_end" description:"创建时间结束"`
+	CreatedAtStart    *time.Time `json:"created_at_start" query:"created_at_start" description:"创建时间起始"`
+	CreatedAtEnd      *time.Time `json:"created_at_end" query:"created_at_end" description:"创建时间结束"`
+	HasActivePackage  *bool      `json:"has_active_package" query:"has_active_package" description:"是否有生效中的套餐（true:有生效中主套餐, false:无生效中主套餐）"`
 }
 
 type DeviceResponse struct {

internal/service/device/service.go

@@ -124,6 +124,9 @@ func (s *Service) List(ctx context.Context, req *dto.ListDeviceRequest) (*dto.Li
 	if req.SeriesID != nil {
 		filters["series_id"] = *req.SeriesID
 	}
+	if req.HasActivePackage != nil {
+		filters["has_active_package"] = *req.HasActivePackage
+	}
 
 	devices, total, err := s.deviceStore.List(ctx, opts, filters)
 	if err != nil {

internal/store/postgres/device_store.go

@@ -177,9 +177,27 @@ func (s *DeviceStore) applyDeviceFilters(query *gorm.DB, filters map[string]any)
 	if seriesID, ok := filters["series_id"].(uint); ok && seriesID > 0 {
 		query = query.Where("series_id = ?", seriesID)
 	}
+	if hasActive, ok := filters["has_active_package"].(bool); ok {
+		query = s.applyHasActivePackageFilter(query, hasActive)
+	}
 	return query
 }
 
+// applyHasActivePackageFilter 按"是否有生效中主套餐"过滤设备。
+// true: 设备在 tb_package_usage 中存在生效中(status=PackageUsageStatusActive)的主套餐记录；
+// false: 不存在上述记录。
+func (s *DeviceStore) applyHasActivePackageFilter(query *gorm.DB, hasActive bool) *gorm.DB {
+	subQuery := `SELECT 1 FROM tb_package_usage AS pu
+		WHERE pu.device_id = tb_device.id
+		  AND pu.status = ?
+		  AND pu.master_usage_id IS NULL
+		  AND pu.deleted_at IS NULL`
+	if hasActive {
+		return query.Where("EXISTS ("+subQuery+")", constants.PackageUsageStatusActive)
+	}
+	return query.Where("NOT EXISTS ("+subQuery+")", constants.PackageUsageStatusActive)
+}
+
 func (s *DeviceStore) applyActivationStatusFilter(query *gorm.DB, activationStatus int) *gorm.DB {
 	activeCondition := `EXISTS (
 		SELECT 1